1 /*
2 * merge.c: merging
3 *
4 * ====================================================================
5 * Licensed to the Apache Software Foundation (ASF) under one
6 * or more contributor license agreements. See the NOTICE file
7 * distributed with this work for additional information
8 * regarding copyright ownership. The ASF licenses this file
9 * to you under the Apache License, Version 2.0 (the
10 * "License"); you may not use this file except in compliance
11 * with the License. You may obtain a copy of the License at
12 *
13 * http://www.apache.org/licenses/LICENSE-2.0
14 *
15 * Unless required by applicable law or agreed to in writing,
16 * software distributed under the License is distributed on an
17 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
18 * KIND, either express or implied. See the License for the
19 * specific language governing permissions and limitations
20 * under the License.
21 * ====================================================================
22 */
23
24 /* ==================================================================== */
25
26
27
28 /*** Includes ***/
29
30 #include <assert.h>
31 #include <apr_strings.h>
32 #include <apr_tables.h>
33 #include <apr_hash.h>
34 #include "svn_types.h"
35 #include "svn_hash.h"
36 #include "svn_wc.h"
37 #include "svn_delta.h"
38 #include "svn_diff.h"
39 #include "svn_mergeinfo.h"
40 #include "svn_client.h"
41 #include "svn_string.h"
42 #include "svn_error.h"
43 #include "svn_dirent_uri.h"
44 #include "svn_path.h"
45 #include "svn_io.h"
46 #include "svn_utf.h"
47 #include "svn_pools.h"
48 #include "svn_config.h"
49 #include "svn_props.h"
50 #include "svn_time.h"
51 #include "svn_sorts.h"
52 #include "svn_subst.h"
53 #include "svn_ra.h"
54 #include "client.h"
55 #include "mergeinfo.h"
56
57 #include "private/svn_opt_private.h"
58 #include "private/svn_wc_private.h"
59 #include "private/svn_mergeinfo_private.h"
60 #include "private/svn_fspath.h"
61 #include "private/svn_ra_private.h"
62 #include "private/svn_client_private.h"
63 #include "private/svn_subr_private.h"
64
65 #include "svn_private_config.h"
66
67
68 /*-----------------------------------------------------------------------*/
69
70 /* MERGEINFO MERGE SOURCE NORMALIZATION
71 *
72 * Nearly any helper function herein that accepts two URL/revision
73 * pairs (or equivalent struct merge_source_t) expects one of two things
74 * to be true:
75 *
76 * 1. that mergeinfo is not being recorded at all for this
77 * operation, or
78 *
79 * 2. that the pairs represent two locations along a single line
80 * of version history such that there are no copies in the
81 * history of the object between the locations when treating
82 * the oldest of the two locations as non-inclusive. In other
83 * words, if there is a copy at all between them, there is only
84 * one copy and its source was the oldest of the two locations.
85 *
86 * We use svn_ra_get_location_segments() to split a given range of
87 * revisions across an object's history into several which obey these
88 * rules. For example, an extract from the log of Subversion's own
89 * /subversion/tags/1.4.5 directory shows the following copies between
90 * r859500 and r866500 (omitting the '/subversion' prefix for clarity):
91 *
92 * r859598:
93 * A /branches/1.4.x (from /trunk:859597)
94 *
95 * r865417:
96 * A /tags/1.4.4 (from /branches/1.4.x:865262)
97 * # Notice that this copy leaves a gap between 865262 and 865417.
98 *
99 * r866420:
100 * A /branches/1.4.5 (from /tags/1.4.4:866419)
101 *
102 * r866425:
103 * D /branches/1.4.5
104 * A /tags/1.4.5 (from /branches/1.4.5:866424)
105 *
106 * In graphical form:
107 *
108 * 859500 859597 865262 866419 866424 866500
109 * . . . . . .
110 * trunk ------------------------------------------------
111 * \ . . .
112 * branches/1.4.x A-------------------------------------
113 * . \______ . .
114 * . \ . .
115 * tags/1.4.4 . A-----------------------
116 * . . \ .
117 * branches/1.4.5 . . A------D
118 * . . . \.
119 * tags/1.4.5 . . . A---------
120 * . . . .
121 * 859598 865417 866420 866425
122 *
123 * A merge of the difference between r859500 and r866500 of this directory
124 * gets split into sequential merges of the following location pairs.
125 *
126 * 859500 859597 865262 865416 866419 866424 866500
127 * . . . . . . .
128 * trunk (======] . . . . .
129 * . . . . .
130 * trunk ( . . . . .
131 * branches/1.4.x ======] . . . .
132 * . . . .
133 * branches/1.4.x ( . . . .
134 * tags/1.4.4 =============] . .
135 * implicit_src_gap (======] . . .
136 * . . .
137 * tags/1.4.4 ( . .
138 * branches/1.4.5 ======] .
139 * . .
140 * branches/1.4.5 ( .
141 * tags/1.4.5 ======]
142 *
143 * which are represented in merge_source_t as:
144 *
145 * [/trunk:859500, /trunk:859597]
146 * (recorded in svn:mergeinfo as /trunk:859501-859597)
147 *
148 * [/trunk:859597, /branches/1.4.x:865262]
149 * (recorded in svn:mergeinfo as /branches/1.4.x:859598-865262)
150 *
151 * [/branches/1.4.x:865262, /tags/1.4.4@866419]
152 * (recorded in svn:mergeinfo as /tags/1.4.4:865263-866419)
153 * (and there is a gap, the revision range [865262, 865416])
154 *
155 * [/tags/1.4.4@866419, /branches/1.4.5@866424]
156 * (recorded in svn:mergeinfo as /branches/1.4.5:866420-866424)
157 *
158 * [/branches/1.4.5@866424, /tags/1.4.5@866500]
159 * (recorded in svn:mergeinfo as /tags/1.4.5:866425-866500)
160 *
161 * Our helper functions would then operate on one of these location
162 * pairs at a time.
163 */
164
165 /* WHICH SVN_CLIENT_MERGE* API DO I WANT?
166 *
167 * libsvn_client has three public merge APIs; they are all wrappers
168 * around the do_merge engine. Which one to use depends on the number
169 * of URLs passed as arguments and whether or not specific merge
170 * ranges (-c/-r) are specified.
171 *
172 * 1 URL 2 URLs
173 * +----+--------------------------------+---------------------+
174 * | -c | mergeinfo-driven | |
175 * | or | cherrypicking | |
176 * | -r | (svn_client_merge_peg) | |
177 * |----+--------------------------------+ |
178 * | | mergeinfo-driven | unsupported |
179 * | | 'cherry harvest', i.e. merge | |
180 * | | all revisions from URL that | |
181 * | no | have not already been merged | |
182 * | -c | (svn_client_merge_peg) | |
183 * | or +--------------------------------+---------------------+
184 * | -r | mergeinfo-driven | mergeinfo-writing |
185 * | | whole-branch | diff-and-apply |
186 * | | heuristic merge | (svn_client_merge) |
187 * | | (svn_client_merge_reintegrate) | |
188 * +----+--------------------------------+---------------------+
189 *
190 *
191 */
192
193 /* THE CHILDREN_WITH_MERGEINFO ARRAY
194 *
195 * Many of the helper functions in this file pass around an
196 * apr_array_header_t *CHILDREN_WITH_MERGEINFO. This is a depth first
197 * sorted array filled with svn_client__merge_path_t * describing the
198 * merge target and any of its subtrees which have explicit mergeinfo
199 * or otherwise need special attention during a merge.
200 *
201 * During mergeinfo unaware merges, CHILDREN_WITH_MERGEINFO contains
202 * contains only one element (added by do_mergeinfo_unaware_dir_merge)
203 * describing a contiguous range to be merged to the WC merge target.
204 *
205 * During mergeinfo aware merges CHILDREN_WITH_MERGEINFO is created
206 * by get_mergeinfo_paths() and outside of that function and its helpers
207 * should always meet the criteria dictated in get_mergeinfo_paths()'s doc
208 * string. The elements of CHILDREN_WITH_MERGEINFO should never be NULL.
209 *
210 * For clarification on mergeinfo aware vs. mergeinfo unaware merges, see
211 * the doc string for HONOR_MERGEINFO().
212 */
213
214
215 /*-----------------------------------------------------------------------*/
216
217 /*** Repos-Diff Editor Callbacks ***/
218
219 /* */
220 typedef struct merge_source_t
221 {
222 /* "left" side URL and revision (inclusive iff youngest) */
223 const svn_client__pathrev_t *loc1;
224
225 /* "right" side URL and revision (inclusive iff youngest) */
226 const svn_client__pathrev_t *loc2;
227
228 /* True iff LOC1 is an ancestor of LOC2 or vice-versa (history-wise). */
229 svn_boolean_t ancestral;
230 } merge_source_t;
231
232 /* Description of the merge target root node (a WC working node) */
233 typedef struct merge_target_t
234 {
235 /* Absolute path to the WC node */
236 const char *abspath;
237
238 /* The repository location of the base node of the target WC. If the node
239 * is locally added, then URL & REV are NULL & SVN_INVALID_REVNUM.
240 * REPOS_ROOT_URL and REPOS_UUID are always valid. */
241 svn_client__pathrev_t loc;
242
243 } merge_target_t;
244
245 typedef struct merge_cmd_baton_t {
246 svn_boolean_t force_delete; /* Delete a file/dir even if modified */
247 svn_boolean_t dry_run;
248 svn_boolean_t record_only; /* Whether to merge only mergeinfo
249 differences. */
250 svn_boolean_t same_repos; /* Whether the merge source repository
251 is the same repository as the
252 target. Defaults to FALSE if DRY_RUN
253 is TRUE.*/
254 svn_boolean_t mergeinfo_capable; /* Whether the merge source server
255 is capable of Merge Tracking. */
256 svn_boolean_t ignore_mergeinfo; /* Don't honor mergeinfo; see
257 doc string of do_merge(). FALSE if
258 MERGE_SOURCE->ancestral is FALSE. */
259 svn_boolean_t diff_ignore_ancestry; /* Diff unrelated nodes as if related; see
260 doc string of do_merge(). FALSE if
261 MERGE_SOURCE->ancestral is FALSE. */
262 svn_boolean_t reintegrate_merge; /* Whether this is a --reintegrate
263 merge or not. */
264 const merge_target_t *target; /* Description of merge target node */
265
266 /* The left and right URLs and revs. The value of this field changes to
267 reflect the merge_source_t *currently* being merged by do_merge(). */
268 merge_source_t merge_source;
269
270 /* Rangelist containing single range which describes the gap, if any,
271 in the natural history of the merge source currently being processed.
272 See http://subversion.tigris.org/issues/show_bug.cgi?id=3432.
273 Updated during each call to do_directory_merge(). May be NULL if there
274 is no gap. */
275 svn_rangelist_t *implicit_src_gap;
276
277 svn_client_ctx_t *ctx; /* Client context for callbacks, etc. */
278
279 /* The list of any paths which remained in conflict after a
280 resolution attempt was made. We track this in-memory, rather
281 than just using WC entry state, since the latter doesn't help us
282 when in dry_run mode.
283 ### And because we only want to resolve conflicts that were
284 generated by this merge, not pre-existing ones? */
285 apr_hash_t *conflicted_paths;
286
287 /* A list of absolute paths which had no explicit mergeinfo prior to the
288 merge but got explicit mergeinfo added by the merge. This is populated
289 by merge_change_props() and is allocated in POOL so it is subject to the
290 lifetime limitations of POOL. Is NULL if no paths are found which
291 meet the criteria or DRY_RUN is true. */
292 apr_hash_t *paths_with_new_mergeinfo;
293
294 /* A list of absolute paths whose mergeinfo doesn't need updating after
295 the merge. This can be caused by the removal of mergeinfo by the merge
296 or by deleting the node itself. This is populated by merge_change_props()
297 and the delete callbacks and is allocated in POOL so it is subject to the
298 lifetime limitations of POOL. Is NULL if no paths are found which
299 meet the criteria or DRY_RUN is true. */
300 apr_hash_t *paths_with_deleted_mergeinfo;
301
302 /* The list of absolute skipped paths, which should be examined and
303 cleared after each invocation of the callback. The paths
304 are absolute. Is NULL if MERGE_B->MERGE_SOURCE->ancestral and
305 MERGE_B->REINTEGRATE_MERGE are both false. */
306 apr_hash_t *skipped_abspaths;
307
308 /* The list of absolute merged paths. Unused if MERGE_B->MERGE_SOURCE->ancestral
309 and MERGE_B->REINTEGRATE_MERGE are both false. */
310 apr_hash_t *merged_abspaths;
311
312 /* A hash of (const char *) absolute WC paths mapped to the same which
313 represent the roots of subtrees added by the merge. */
314 apr_hash_t *added_abspaths;
315
316 /* A list of tree conflict victim absolute paths which may be NULL. */
317 apr_hash_t *tree_conflicted_abspaths;
318
319 /* The diff3_cmd in ctx->config, if any, else null. We could just
320 extract this as needed, but since more than one caller uses it,
321 we just set it up when this baton is created. */
322 const char *diff3_cmd;
323 const apr_array_header_t *merge_options;
324
325 /* Array of file extension patterns to preserve as extensions in
326 generated conflict files. */
327 const apr_array_header_t *ext_patterns;
328
329 /* RA sessions used throughout a merge operation. Opened/re-parented
330 as needed.
331
332 NOTE: During the actual merge editor drive, RA_SESSION1 is used
333 for the primary editing and RA_SESSION2 for fetching additional
334 information -- as necessary -- from the repository. So during
335 this phase of the merge, you *must not* reparent RA_SESSION1; use
336 (temporarily reparenting if you must) RA_SESSION2 instead. */
337 svn_ra_session_t *ra_session1;
338 svn_ra_session_t *ra_session2;
339
340 /* During the merge, *USE_SLEEP is set to TRUE if a sleep will be required
341 afterwards to ensure timestamp integrity, or unchanged if not. */
342 svn_boolean_t *use_sleep;
343
344 /* Pool which has a lifetime limited to one iteration over a given
345 merge source, i.e. it is cleared on every call to do_directory_merge()
346 or do_file_merge() in do_merge(). */
347 apr_pool_t *pool;
348
349
350 /* State for notify_merge_begin() */
351 struct notify_begin_state_t
352 {
353 /* Cache of which abspath was last notified. */
354 const char *last_abspath;
355
356 /* Reference to the one-and-only CHILDREN_WITH_MERGEINFO (see global
357 comment) or a similar list for single-file-merges */
358 const apr_array_header_t *nodes_with_mergeinfo;
359 } notify_begin;
360
361 } merge_cmd_baton_t;
362
363
364 /* Return TRUE iff we should be taking account of mergeinfo in deciding what
365 changes to merge, for the merge described by MERGE_B. Specifically, that
366 is if the merge source server is capable of merge tracking, the left-side
367 merge source is an ancestor of the right-side (or vice-versa), the merge
368 source is in the same repository as the merge target, and we are not
369 ignoring mergeinfo. */
370 #define HONOR_MERGEINFO(merge_b) ((merge_b)->mergeinfo_capable \
371 && (merge_b)->merge_source.ancestral \
372 && (merge_b)->same_repos \
373 && (! (merge_b)->ignore_mergeinfo))
374
375
376 /* Return TRUE iff we should be recording mergeinfo for the merge described
377 by MERGE_B. Specifically, that is if we are honoring mergeinfo and the
378 merge is not a dry run. */
379 #define RECORD_MERGEINFO(merge_b) (HONOR_MERGEINFO(merge_b) \
380 && !(merge_b)->dry_run)
381
382
383 /*-----------------------------------------------------------------------*/
384
385 /*** Utilities ***/
386
387 /* Return TRUE iff the session URL of RA_SESSION is equal to URL. Useful in
388 * asserting preconditions. */
389 static svn_boolean_t
session_url_is(svn_ra_session_t * ra_session,const char * url,apr_pool_t * scratch_pool)390 session_url_is(svn_ra_session_t *ra_session,
391 const char *url,
392 apr_pool_t *scratch_pool)
393 {
394 const char *session_url;
395 svn_error_t *err
396 = svn_ra_get_session_url(ra_session, &session_url, scratch_pool);
397
398 SVN_ERR_ASSERT_NO_RETURN(! err);
399 return strcmp(url, session_url) == 0;
400 }
401
402 /* Return a new merge_source_t structure, allocated in RESULT_POOL,
403 * initialized with deep copies of LOC1 and LOC2 and ANCESTRAL. */
404 static merge_source_t *
merge_source_create(const svn_client__pathrev_t * loc1,const svn_client__pathrev_t * loc2,svn_boolean_t ancestral,apr_pool_t * result_pool)405 merge_source_create(const svn_client__pathrev_t *loc1,
406 const svn_client__pathrev_t *loc2,
407 svn_boolean_t ancestral,
408 apr_pool_t *result_pool)
409 {
410 merge_source_t *s
411 = apr_palloc(result_pool, sizeof(*s));
412
413 s->loc1 = svn_client__pathrev_dup(loc1, result_pool);
414 s->loc2 = svn_client__pathrev_dup(loc2, result_pool);
415 s->ancestral = ancestral;
416 return s;
417 }
418
419 /* Return a deep copy of SOURCE, allocated in RESULT_POOL. */
420 static merge_source_t *
merge_source_dup(const merge_source_t * source,apr_pool_t * result_pool)421 merge_source_dup(const merge_source_t *source,
422 apr_pool_t *result_pool)
423 {
424 merge_source_t *s = apr_palloc(result_pool, sizeof(*s));
425
426 s->loc1 = svn_client__pathrev_dup(source->loc1, result_pool);
427 s->loc2 = svn_client__pathrev_dup(source->loc2, result_pool);
428 s->ancestral = source->ancestral;
429 return s;
430 }
431
432 /* Return SVN_ERR_UNSUPPORTED_FEATURE if URL is not inside the repository
433 of LOCAL_ABSPATH. Use SCRATCH_POOL for temporary allocations. */
434 static svn_error_t *
check_repos_match(const merge_target_t * target,const char * local_abspath,const char * url,apr_pool_t * scratch_pool)435 check_repos_match(const merge_target_t *target,
436 const char *local_abspath,
437 const char *url,
438 apr_pool_t *scratch_pool)
439 {
440 if (!svn_uri__is_ancestor(target->loc.repos_root_url, url))
441 return svn_error_createf(
442 SVN_ERR_UNSUPPORTED_FEATURE, NULL,
443 _("URL '%s' of '%s' is not in repository '%s'"),
444 url, svn_dirent_local_style(local_abspath, scratch_pool),
445 target->loc.repos_root_url);
446
447 return SVN_NO_ERROR;
448 }
449
450 /* Return TRUE iff the repository of LOCATION1 is the same as
451 * that of LOCATION2. If STRICT_URLS is true, the URLs must
452 * match (and the UUIDs, just to be sure), otherwise just the UUIDs must
453 * match and the URLs can differ (a common case is http versus https). */
454 static svn_boolean_t
is_same_repos(const svn_client__pathrev_t * location1,const svn_client__pathrev_t * location2,svn_boolean_t strict_urls)455 is_same_repos(const svn_client__pathrev_t *location1,
456 const svn_client__pathrev_t *location2,
457 svn_boolean_t strict_urls)
458 {
459 if (strict_urls)
460 return (strcmp(location1->repos_root_url, location2->repos_root_url) == 0
461 && strcmp(location1->repos_uuid, location2->repos_uuid) == 0);
462 else
463 return (strcmp(location1->repos_uuid, location2->repos_uuid) == 0);
464 }
465
466 /* If the repository identified of LOCATION1 is not the same as that
467 * of LOCATION2, throw a SVN_ERR_CLIENT_UNRELATED_RESOURCES
468 * error mentioning PATH1 and PATH2. For STRICT_URLS, see is_same_repos().
469 */
470 static svn_error_t *
check_same_repos(const svn_client__pathrev_t * location1,const char * path1,const svn_client__pathrev_t * location2,const char * path2,svn_boolean_t strict_urls,apr_pool_t * scratch_pool)471 check_same_repos(const svn_client__pathrev_t *location1,
472 const char *path1,
473 const svn_client__pathrev_t *location2,
474 const char *path2,
475 svn_boolean_t strict_urls,
476 apr_pool_t *scratch_pool)
477 {
478 if (! is_same_repos(location1, location2, strict_urls))
479 return svn_error_createf(SVN_ERR_CLIENT_UNRELATED_RESOURCES, NULL,
480 _("'%s' must be from the same repository as "
481 "'%s'"), path1, path2);
482 return SVN_NO_ERROR;
483 }
484
485 /* Store LOCAL_ABSPATH in PATH_HASH after duplicating it into the pool
486 containing PATH_HASH. */
487 static APR_INLINE void
store_path(apr_hash_t * path_hash,const char * local_abspath)488 store_path(apr_hash_t *path_hash, const char *local_abspath)
489 {
490 const char *dup_path = apr_pstrdup(apr_hash_pool_get(path_hash),
491 local_abspath);
492
493 svn_hash_sets(path_hash, dup_path, dup_path);
494 }
495
496 /* Store LOCAL_ABSPATH in *PATH_HASH_P after duplicating it into the pool
497 containing *PATH_HASH_P. If *PATH_HASH_P is NULL, then first set
498 *PATH_HASH_P to a new hash allocated from POOL. */
499 static APR_INLINE void
alloc_and_store_path(apr_hash_t ** path_hash_p,const char * local_abspath,apr_pool_t * pool)500 alloc_and_store_path(apr_hash_t **path_hash_p,
501 const char *local_abspath,
502 apr_pool_t *pool)
503 {
504 if (! *path_hash_p)
505 *path_hash_p = apr_hash_make(pool);
506 store_path(*path_hash_p, local_abspath);
507 }
508
509 /* Return whether any WC path was put in conflict by the merge
510 operation corresponding to MERGE_B. */
511 static APR_INLINE svn_boolean_t
is_path_conflicted_by_merge(merge_cmd_baton_t * merge_b)512 is_path_conflicted_by_merge(merge_cmd_baton_t *merge_b)
513 {
514 return (merge_b->conflicted_paths &&
515 apr_hash_count(merge_b->conflicted_paths) > 0);
516 }
517
518 /* Return a state indicating whether the WC metadata matches the
519 * node kind on disk of the local path LOCAL_ABSPATH.
520 * Use MERGE_B to determine the dry-run details; particularly, if a dry run
521 * noted that it deleted this path, assume matching node kinds (as if both
522 * kinds were svn_node_none).
523 *
524 * - Return svn_wc_notify_state_inapplicable if the node kind matches.
525 * - Return 'obstructed' if there is a node on disk where none or a
526 * different kind is expected, or if the disk node cannot be read.
527 * - Return 'missing' if there is no node on disk but one is expected.
528 * Also return 'missing' for server-excluded nodes (not here due to
529 * authz or other reasons determined by the server).
530 *
531 * Optionally return a bit more info for interested users.
532 **/
533 static svn_error_t *
perform_obstruction_check(svn_wc_notify_state_t * obstruction_state,svn_boolean_t * deleted,svn_boolean_t * excluded,svn_node_kind_t * kind,svn_depth_t * parent_depth,const merge_cmd_baton_t * merge_b,const char * local_abspath,apr_pool_t * scratch_pool)534 perform_obstruction_check(svn_wc_notify_state_t *obstruction_state,
535 svn_boolean_t *deleted,
536 svn_boolean_t *excluded,
537 svn_node_kind_t *kind,
538 svn_depth_t *parent_depth,
539 const merge_cmd_baton_t *merge_b,
540 const char *local_abspath,
541 apr_pool_t *scratch_pool)
542 {
543 svn_wc_context_t *wc_ctx = merge_b->ctx->wc_ctx;
544 svn_node_kind_t wc_kind;
545 svn_boolean_t check_root;
546
547 SVN_ERR_ASSERT(svn_dirent_is_absolute(local_abspath));
548
549 *obstruction_state = svn_wc_notify_state_inapplicable;
550
551 if (deleted)
552 *deleted = FALSE;
553 if (kind)
554 *kind = svn_node_none;
555
556 if (kind == NULL)
557 kind = &wc_kind;
558
559 check_root = ! strcmp(local_abspath, merge_b->target->abspath);
560
561 SVN_ERR(svn_wc__check_for_obstructions(obstruction_state,
562 kind,
563 deleted,
564 excluded,
565 parent_depth,
566 wc_ctx, local_abspath,
567 check_root,
568 scratch_pool));
569 return SVN_NO_ERROR;
570 }
571
572 /* Create *LEFT and *RIGHT conflict versions for conflict victim
573 * at VICTIM_ABSPATH, with kind NODE_KIND, using information obtained
574 * from MERGE_SOURCE and TARGET.
575 * Allocate returned conflict versions in RESULT_POOL. */
576 static svn_error_t *
make_conflict_versions(const svn_wc_conflict_version_t ** left,const svn_wc_conflict_version_t ** right,const char * victim_abspath,svn_node_kind_t node_kind,const merge_source_t * merge_source,const merge_target_t * target,apr_pool_t * result_pool,apr_pool_t * scratch_pool)577 make_conflict_versions(const svn_wc_conflict_version_t **left,
578 const svn_wc_conflict_version_t **right,
579 const char *victim_abspath,
580 svn_node_kind_t node_kind,
581 const merge_source_t *merge_source,
582 const merge_target_t *target,
583 apr_pool_t *result_pool,
584 apr_pool_t *scratch_pool)
585 {
586 const char *child = svn_dirent_skip_ancestor(target->abspath,
587 victim_abspath);
588 const char *left_relpath, *right_relpath;
589
590 SVN_ERR_ASSERT(child != NULL);
591 left_relpath = svn_client__pathrev_relpath(merge_source->loc1,
592 scratch_pool);
593 right_relpath = svn_client__pathrev_relpath(merge_source->loc2,
594 scratch_pool);
595
596 *left = svn_wc_conflict_version_create2(
597 merge_source->loc1->repos_root_url,
598 merge_source->loc1->repos_uuid,
599 svn_relpath_join(left_relpath, child, scratch_pool),
600 merge_source->loc1->rev, node_kind, result_pool);
601
602 *right = svn_wc_conflict_version_create2(
603 merge_source->loc2->repos_root_url,
604 merge_source->loc2->repos_uuid,
605 svn_relpath_join(right_relpath, child, scratch_pool),
606 merge_source->loc2->rev, node_kind, result_pool);
607
608 return SVN_NO_ERROR;
609 }
610
611 /* Helper for filter_self_referential_mergeinfo()
612
613 *MERGEINFO is a non-empty, non-null collection of mergeinfo.
614
615 Remove all mergeinfo from *MERGEINFO that describes revision ranges
616 greater than REVISION. Put a copy of any removed mergeinfo, allocated
617 in POOL, into *YOUNGER_MERGEINFO.
618
619 If no mergeinfo is removed from *MERGEINFO then *YOUNGER_MERGEINFO is set
620 to NULL. If all mergeinfo is removed from *MERGEINFO then *MERGEINFO is
621 set to NULL.
622 */
623 static svn_error_t*
split_mergeinfo_on_revision(svn_mergeinfo_t * younger_mergeinfo,svn_mergeinfo_t * mergeinfo,svn_revnum_t revision,apr_pool_t * pool)624 split_mergeinfo_on_revision(svn_mergeinfo_t *younger_mergeinfo,
625 svn_mergeinfo_t *mergeinfo,
626 svn_revnum_t revision,
627 apr_pool_t *pool)
628 {
629 apr_hash_index_t *hi;
630 apr_pool_t *iterpool = svn_pool_create(pool);
631
632 *younger_mergeinfo = NULL;
633 for (hi = apr_hash_first(pool, *mergeinfo); hi; hi = apr_hash_next(hi))
634 {
635 int i;
636 const char *merge_source_path = svn__apr_hash_index_key(hi);
637 svn_rangelist_t *rangelist = svn__apr_hash_index_val(hi);
638
639 svn_pool_clear(iterpool);
640
641 for (i = 0; i < rangelist->nelts; i++)
642 {
643 svn_merge_range_t *range =
644 APR_ARRAY_IDX(rangelist, i, svn_merge_range_t *);
645 if (range->end <= revision)
646 {
647 /* This entirely of this range is as old or older than
648 REVISION, so leave it in *MERGEINFO. */
649 continue;
650 }
651 else
652 {
653 /* Since the rangelists in svn_mergeinfo_t's are sorted in
654 increasing order we know that part or all of *this* range
655 and *all* of the remaining ranges in *RANGELIST are younger
656 than REVISION. Remove the younger rangelists from
657 *MERGEINFO and put them in *YOUNGER_MERGEINFO. */
658 int j;
659 svn_rangelist_t *younger_rangelist =
660 apr_array_make(pool, 1, sizeof(svn_merge_range_t *));
661
662 for (j = i; j < rangelist->nelts; j++)
663 {
664 svn_merge_range_t *younger_range = svn_merge_range_dup(
665 APR_ARRAY_IDX(rangelist, j, svn_merge_range_t *), pool);
666
667 /* REVISION might intersect with the first range where
668 range->end > REVISION. If that is the case then split
669 the current range into two, putting the younger half
670 into *YOUNGER_MERGEINFO and leaving the older half in
671 *MERGEINFO. */
672 if (j == i && range->start + 1 <= revision)
673 younger_range->start = range->end = revision;
674
675 APR_ARRAY_PUSH(younger_rangelist, svn_merge_range_t *) =
676 younger_range;
677 }
678
679 /* So far we've only been manipulating rangelists, now we
680 actually create *YOUNGER_MERGEINFO and then remove the older
681 ranges from *MERGEINFO */
682 if (!(*younger_mergeinfo))
683 *younger_mergeinfo = apr_hash_make(pool);
684 svn_hash_sets(*younger_mergeinfo, merge_source_path,
685 younger_rangelist);
686 SVN_ERR(svn_mergeinfo_remove2(mergeinfo, *younger_mergeinfo,
687 *mergeinfo, TRUE, pool, iterpool));
688 break; /* ...out of for (i = 0; i < rangelist->nelts; i++) */
689 }
690 }
691 }
692
693 svn_pool_destroy(iterpool);
694
695 return SVN_NO_ERROR;
696 }
697
698
699 /* Make a copy of PROPCHANGES (array of svn_prop_t) into *TRIMMED_PROPCHANGES,
700 omitting any svn:mergeinfo changes. */
701 static svn_error_t *
omit_mergeinfo_changes(apr_array_header_t ** trimmed_propchanges,const apr_array_header_t * propchanges,apr_pool_t * result_pool)702 omit_mergeinfo_changes(apr_array_header_t **trimmed_propchanges,
703 const apr_array_header_t *propchanges,
704 apr_pool_t *result_pool)
705 {
706 int i;
707
708 *trimmed_propchanges = apr_array_make(result_pool,
709 propchanges->nelts,
710 sizeof(svn_prop_t));
711
712 for (i = 0; i < propchanges->nelts; ++i)
713 {
714 const svn_prop_t *change = &APR_ARRAY_IDX(propchanges, i, svn_prop_t);
715
716 /* If this property is not svn:mergeinfo, then copy it. */
717 if (strcmp(change->name, SVN_PROP_MERGEINFO) != 0)
718 APR_ARRAY_PUSH(*trimmed_propchanges, svn_prop_t) = *change;
719 }
720
721 return SVN_NO_ERROR;
722 }
723
724
725 /* Helper for merge_props_changed().
726
727 *PROPS is an array of svn_prop_t structures representing regular properties
728 to be added to the working copy TARGET_ABSPATH.
729
730 The merge source and target are assumed to be in the same repository.
731
732 Filter out mergeinfo property additions to TARGET_ABSPATH when
733 those additions refer to the same line of history as TARGET_ABSPATH as
734 described below.
735
736 Examine the added mergeinfo, looking at each range (or single rev)
737 of each source path. If a source_path/range refers to the same line of
738 history as TARGET_ABSPATH (pegged at its base revision), then filter out
739 that range. If the entire rangelist for a given path is filtered then
740 filter out the path as well.
741
742 RA_SESSION is an open RA session to the repository
743 in which both the source and target live, else RA_SESSION is not used. It
744 may be temporarily reparented as needed by this function.
745
746 Use CTX for any further client operations.
747
748 If any filtering occurs, set outgoing *PROPS to a shallow copy (allocated
749 in POOL) of incoming *PROPS minus the filtered mergeinfo. */
750 static svn_error_t *
filter_self_referential_mergeinfo(apr_array_header_t ** props,const char * target_abspath,svn_ra_session_t * ra_session,svn_client_ctx_t * ctx,apr_pool_t * pool)751 filter_self_referential_mergeinfo(apr_array_header_t **props,
752 const char *target_abspath,
753 svn_ra_session_t *ra_session,
754 svn_client_ctx_t *ctx,
755 apr_pool_t *pool)
756 {
757 apr_array_header_t *adjusted_props;
758 int i;
759 apr_pool_t *iterpool;
760 svn_boolean_t is_copy;
761 const char *repos_relpath;
762 svn_client__pathrev_t target_base;
763
764 /* If PATH itself has been added there is no need to filter. */
765 SVN_ERR(svn_wc__node_get_origin(&is_copy, &target_base.rev, &repos_relpath,
766 &target_base.repos_root_url,
767 &target_base.repos_uuid, NULL,
768 ctx->wc_ctx, target_abspath, FALSE,
769 pool, pool));
770
771 if (is_copy || !repos_relpath)
772 return SVN_NO_ERROR; /* A copy or a local addition */
773
774 target_base.url = svn_path_url_add_component2(target_base.repos_root_url,
775 repos_relpath, pool);
776
777 adjusted_props = apr_array_make(pool, (*props)->nelts, sizeof(svn_prop_t));
778 iterpool = svn_pool_create(pool);
779 for (i = 0; i < (*props)->nelts; ++i)
780 {
781 svn_prop_t *prop = &APR_ARRAY_IDX((*props), i, svn_prop_t);
782
783 svn_mergeinfo_t mergeinfo, younger_mergeinfo;
784 svn_mergeinfo_t filtered_mergeinfo = NULL;
785 svn_mergeinfo_t filtered_younger_mergeinfo = NULL;
786 svn_error_t *err;
787
788 /* If this property isn't mergeinfo or is NULL valued (i.e. prop removal)
789 or empty mergeinfo it does not require any special handling. There
790 is nothing to filter out of empty mergeinfo and the concept of
791 filtering doesn't apply if we are trying to remove mergeinfo
792 entirely. */
793 if ((strcmp(prop->name, SVN_PROP_MERGEINFO) != 0)
794 || (! prop->value) /* Removal of mergeinfo */
795 || (! prop->value->len)) /* Empty mergeinfo */
796 {
797 APR_ARRAY_PUSH(adjusted_props, svn_prop_t) = *prop;
798 continue;
799 }
800
801 svn_pool_clear(iterpool);
802
803 /* Non-empty mergeinfo; filter self-referential mergeinfo out. */
804
805 /* Parse the incoming mergeinfo to allow easier manipulation. */
806 err = svn_mergeinfo_parse(&mergeinfo, prop->value->data, iterpool);
807
808 if (err)
809 {
810 /* Issue #3896: If we can't parse it, we certainly can't
811 filter it. */
812 if (err->apr_err == SVN_ERR_MERGEINFO_PARSE_ERROR)
813 {
814 svn_error_clear(err);
815 APR_ARRAY_PUSH(adjusted_props, svn_prop_t) = *prop;
816 continue;
817 }
818 else
819 {
820 return svn_error_trace(err);
821 }
822 }
823
824 /* The working copy target PATH is at BASE_REVISION. Divide the
825 incoming mergeinfo into two groups. One where all revision ranges
826 are as old or older than BASE_REVISION and one where all revision
827 ranges are younger.
828
829 Note: You may be wondering why we do this.
830
831 For the incoming mergeinfo "older" than target's base revision we
832 can filter out self-referential mergeinfo efficiently using
833 svn_client__get_history_as_mergeinfo(). We simply look at PATH's
834 natural history as mergeinfo and remove that from any incoming
835 mergeinfo.
836
837 For mergeinfo "younger" than the base revision we can't use
838 svn_ra_get_location_segments() to look into PATH's future
839 history. Instead we must use svn_client__repos_locations() and
840 look at each incoming source/range individually and see if PATH
841 at its base revision and PATH at the start of the incoming range
842 exist on the same line of history. If they do then we can filter
843 out the incoming range. But since we have to do this for each
844 range there is a substantial performance penalty to pay if the
845 incoming ranges are not contiguous, i.e. we call
846 svn_client__repos_locations for each discrete range and incur
847 the cost of a roundtrip communication with the repository. */
848 SVN_ERR(split_mergeinfo_on_revision(&younger_mergeinfo,
849 &mergeinfo,
850 target_base.rev,
851 iterpool));
852
853 /* Filter self-referential mergeinfo from younger_mergeinfo. */
854 if (younger_mergeinfo)
855 {
856 apr_hash_index_t *hi;
857 const char *merge_source_root_url;
858
859 SVN_ERR(svn_ra_get_repos_root2(ra_session,
860 &merge_source_root_url, iterpool));
861
862 for (hi = apr_hash_first(iterpool, younger_mergeinfo);
863 hi; hi = apr_hash_next(hi))
864 {
865 int j;
866 const char *source_path = svn__apr_hash_index_key(hi);
867 svn_rangelist_t *rangelist = svn__apr_hash_index_val(hi);
868 const char *merge_source_url;
869 svn_rangelist_t *adjusted_rangelist =
870 apr_array_make(iterpool, 0, sizeof(svn_merge_range_t *));
871
872 merge_source_url =
873 svn_path_url_add_component2(merge_source_root_url,
874 source_path + 1, iterpool);
875
876 for (j = 0; j < rangelist->nelts; j++)
877 {
878 svn_error_t *err2;
879 svn_client__pathrev_t *start_loc;
880 svn_merge_range_t *range =
881 APR_ARRAY_IDX(rangelist, j, svn_merge_range_t *);
882
883 /* Because the merge source normalization code
884 ensures mergeinfo refers to real locations on
885 the same line of history, there's no need to
886 look at the whole range, just the start. */
887
888 /* Check if PATH@BASE_REVISION exists at
889 RANGE->START on the same line of history.
890 (start+1 because RANGE->start is not inclusive.) */
891 err2 = svn_client__repos_location(&start_loc, ra_session,
892 &target_base,
893 range->start + 1,
894 ctx, iterpool, iterpool);
895 if (err2)
896 {
897 if (err2->apr_err == SVN_ERR_CLIENT_UNRELATED_RESOURCES
898 || err2->apr_err == SVN_ERR_FS_NOT_FOUND
899 || err2->apr_err == SVN_ERR_FS_NO_SUCH_REVISION)
900 {
901 /* PATH@BASE_REVISION didn't exist at
902 RANGE->START + 1 or is unrelated to the
903 resource PATH@RANGE->START. Some of the
904 requested revisions may not even exist in
905 the repository; a real possibility since
906 mergeinfo is hand editable. In all of these
907 cases clear and ignore the error and don't
908 do any filtering.
909
910 Note: In this last case it is possible that
911 we will allow self-referential mergeinfo to
912 be applied, but fixing it here is potentially
913 very costly in terms of finding what part of
914 a range is actually valid. Simply allowing
915 the merge to proceed without filtering the
916 offending range seems the least worst
917 option. */
918 svn_error_clear(err2);
919 err2 = NULL;
920 APR_ARRAY_PUSH(adjusted_rangelist,
921 svn_merge_range_t *) = range;
922 }
923 else
924 {
925 return svn_error_trace(err2);
926 }
927 }
928 else
929 {
930 /* PATH@BASE_REVISION exists on the same
931 line of history at RANGE->START and RANGE->END.
932 Now check that PATH@BASE_REVISION's path
933 names at RANGE->START and RANGE->END are the same.
934 If the names are not the same then the mergeinfo
935 describing PATH@RANGE->START through
936 PATH@RANGE->END actually belong to some other
937 line of history and we want to record this
938 mergeinfo, not filter it. */
939 if (strcmp(start_loc->url, merge_source_url) != 0)
940 {
941 APR_ARRAY_PUSH(adjusted_rangelist,
942 svn_merge_range_t *) = range;
943 }
944 }
945 /* else no need to add, this mergeinfo is
946 all on the same line of history. */
947 } /* for (j = 0; j < rangelist->nelts; j++) */
948
949 /* Add any rangelists for source_path that are not
950 self-referential. */
951 if (adjusted_rangelist->nelts)
952 {
953 if (!filtered_younger_mergeinfo)
954 filtered_younger_mergeinfo = apr_hash_make(iterpool);
955 svn_hash_sets(filtered_younger_mergeinfo, source_path,
956 adjusted_rangelist);
957 }
958
959 } /* Iteration over each merge source in younger_mergeinfo. */
960 } /* if (younger_mergeinfo) */
961
962 /* Filter self-referential mergeinfo from "older" mergeinfo. */
963 if (mergeinfo)
964 {
965 svn_mergeinfo_t implicit_mergeinfo;
966
967 SVN_ERR(svn_client__get_history_as_mergeinfo(
968 &implicit_mergeinfo, NULL,
969 &target_base, target_base.rev, SVN_INVALID_REVNUM,
970 ra_session, ctx, iterpool));
971
972 /* Remove PATH's implicit mergeinfo from the incoming mergeinfo. */
973 SVN_ERR(svn_mergeinfo_remove2(&filtered_mergeinfo,
974 implicit_mergeinfo,
975 mergeinfo, TRUE, iterpool, iterpool));
976 }
977
978 /* Combine whatever older and younger filtered mergeinfo exists
979 into filtered_mergeinfo. */
980 if (filtered_mergeinfo && filtered_younger_mergeinfo)
981 SVN_ERR(svn_mergeinfo_merge2(filtered_mergeinfo,
982 filtered_younger_mergeinfo, iterpool,
983 iterpool));
984 else if (filtered_younger_mergeinfo)
985 filtered_mergeinfo = filtered_younger_mergeinfo;
986
987 /* If there is any incoming mergeinfo remaining after filtering
988 then put it in adjusted_props. */
989 if (filtered_mergeinfo && apr_hash_count(filtered_mergeinfo))
990 {
991 /* Convert filtered_mergeinfo to a svn_prop_t and put it
992 back in the array. */
993 svn_string_t *filtered_mergeinfo_str;
994 svn_prop_t *adjusted_prop = apr_pcalloc(pool,
995 sizeof(*adjusted_prop));
996 SVN_ERR(svn_mergeinfo_to_string(&filtered_mergeinfo_str,
997 filtered_mergeinfo,
998 pool));
999 adjusted_prop->name = SVN_PROP_MERGEINFO;
1000 adjusted_prop->value = filtered_mergeinfo_str;
1001 APR_ARRAY_PUSH(adjusted_props, svn_prop_t) = *adjusted_prop;
1002 }
1003 }
1004 svn_pool_destroy(iterpool);
1005
1006 *props = adjusted_props;
1007 return SVN_NO_ERROR;
1008 }
1009
1010 /* Prepare a set of property changes PROPCHANGES to be used for a merge
1011 operation on LOCAL_ABSPATH.
1012
1013 Remove all non-regular prop-changes (entry-props and WC-props).
1014 Remove all non-mergeinfo prop-changes if it's a record-only merge.
1015 Remove self-referential mergeinfo (### in some cases...)
1016 Remove foreign-repository mergeinfo (### in some cases...)
1017
1018 Store the resulting property changes in *PROP_UPDATES.
1019 Store information on where mergeinfo is updated in MERGE_B.
1020
1021 Used for both file and directory property merges. */
1022 static svn_error_t *
prepare_merge_props_changed(const apr_array_header_t ** prop_updates,const char * local_abspath,const apr_array_header_t * propchanges,merge_cmd_baton_t * merge_b,apr_pool_t * result_pool,apr_pool_t * scratch_pool)1023 prepare_merge_props_changed(const apr_array_header_t **prop_updates,
1024 const char *local_abspath,
1025 const apr_array_header_t *propchanges,
1026 merge_cmd_baton_t *merge_b,
1027 apr_pool_t *result_pool,
1028 apr_pool_t *scratch_pool)
1029 {
1030 apr_array_header_t *props;
1031
1032 SVN_ERR_ASSERT(svn_dirent_is_absolute(local_abspath));
1033
1034 /* We only want to merge "regular" version properties: by
1035 definition, 'svn merge' shouldn't touch any data within .svn/ */
1036 SVN_ERR(svn_categorize_props(propchanges, NULL, NULL, &props,
1037 result_pool));
1038
1039 /* If we are only applying mergeinfo changes then we need to do
1040 additional filtering of PROPS so it contains only mergeinfo changes. */
1041 if (merge_b->record_only && props->nelts)
1042 {
1043 apr_array_header_t *mergeinfo_props =
1044 apr_array_make(result_pool, 1, sizeof(svn_prop_t));
1045 int i;
1046
1047 for (i = 0; i < props->nelts; i++)
1048 {
1049 svn_prop_t *prop = &APR_ARRAY_IDX(props, i, svn_prop_t);
1050
1051 if (strcmp(prop->name, SVN_PROP_MERGEINFO) == 0)
1052 {
1053 APR_ARRAY_PUSH(mergeinfo_props, svn_prop_t) = *prop;
1054 break;
1055 }
1056 }
1057 props = mergeinfo_props;
1058 }
1059
1060 if (props->nelts)
1061 {
1062 /* Issue #3383: We don't want mergeinfo from a foreign repos.
1063
1064 If this is a merge from a foreign repository we must strip all
1065 incoming mergeinfo (including mergeinfo deletions). */
1066 if (! merge_b->same_repos)
1067 SVN_ERR(omit_mergeinfo_changes(&props, props, result_pool));
1068
1069 /* If this is a forward merge then don't add new mergeinfo to
1070 PATH that is already part of PATH's own history, see
1071 http://svn.haxx.se/dev/archive-2008-09/0006.shtml. If the
1072 merge sources are not ancestral then there is no concept of a
1073 'forward' or 'reverse' merge and we filter unconditionally. */
1074 if (merge_b->merge_source.loc1->rev < merge_b->merge_source.loc2->rev
1075 || !merge_b->merge_source.ancestral)
1076 {
1077 if (HONOR_MERGEINFO(merge_b) || merge_b->reintegrate_merge)
1078 SVN_ERR(filter_self_referential_mergeinfo(&props,
1079 local_abspath,
1080 merge_b->ra_session2,
1081 merge_b->ctx,
1082 result_pool));
1083 }
1084 }
1085 *prop_updates = props;
1086
1087 /* Make a record in BATON if we find a PATH where mergeinfo is added
1088 where none existed previously or PATH is having its existing
1089 mergeinfo deleted. */
1090 if (props->nelts)
1091 {
1092 int i;
1093
1094 for (i = 0; i < props->nelts; ++i)
1095 {
1096 svn_prop_t *prop = &APR_ARRAY_IDX(props, i, svn_prop_t);
1097
1098 if (strcmp(prop->name, SVN_PROP_MERGEINFO) == 0)
1099 {
1100 /* Does LOCAL_ABSPATH have any pristine mergeinfo? */
1101 svn_boolean_t has_pristine_mergeinfo = FALSE;
1102 apr_hash_t *pristine_props;
1103
1104 SVN_ERR(svn_wc_get_pristine_props(&pristine_props,
1105 merge_b->ctx->wc_ctx,
1106 local_abspath,
1107 scratch_pool,
1108 scratch_pool));
1109
1110 if (pristine_props
1111 && svn_hash_gets(pristine_props, SVN_PROP_MERGEINFO))
1112 has_pristine_mergeinfo = TRUE;
1113
1114 if (!has_pristine_mergeinfo && prop->value)
1115 {
1116 alloc_and_store_path(&merge_b->paths_with_new_mergeinfo,
1117 local_abspath, merge_b->pool);
1118 }
1119 else if (has_pristine_mergeinfo && !prop->value)
1120 {
1121 alloc_and_store_path(&merge_b->paths_with_deleted_mergeinfo,
1122 local_abspath, merge_b->pool);
1123 }
1124 }
1125 }
1126 }
1127
1128 return SVN_NO_ERROR;
1129 }
1130
1131 #define CONFLICT_REASON_NONE ((svn_wc_conflict_reason_t)-1)
1132 #define CONFLICT_REASON_SKIP ((svn_wc_conflict_reason_t)-2)
1133 #define CONFLICT_REASON_SKIP_WC ((svn_wc_conflict_reason_t)-3)
1134
1135 /* Baton used for testing trees for being editted while performing tree
1136 conflict detection for incoming deletes */
1137 struct dir_delete_baton_t
1138 {
1139 /* Reference to dir baton of directory that is the root of the deletion */
1140 struct merge_dir_baton_t *del_root;
1141
1142 /* Boolean indicating that some edit is found. Allows avoiding more work */
1143 svn_boolean_t found_edit;
1144
1145 /* A list of paths that are compared. Kept up to date until FOUND_EDIT is
1146 set to TRUE */
1147 apr_hash_t *compared_abspaths;
1148 };
1149
1150 /* Baton for the merge_dir_*() functions. Initialized in merge_dir_opened() */
1151 struct merge_dir_baton_t
1152 {
1153 /* Reference to the parent baton, unless the parent is the anchor, in which
1154 case PARENT_BATON is NULL */
1155 struct merge_dir_baton_t *parent_baton;
1156
1157 /* The pool containing this baton. Use for RESULT_POOL for storing in this
1158 baton */
1159 apr_pool_t *pool;
1160
1161 /* This directory doesn't have a representation in the working copy, so any
1162 operation on it will be skipped and possibly cause a tree conflict on the
1163 shadow root */
1164 svn_boolean_t shadowed;
1165
1166 /* This node or one of its descendants received operational changes from the
1167 merge. If this node is the shadow root its tree conflict status has been
1168 applied */
1169 svn_boolean_t edited;
1170
1171 /* If a tree conflict will be installed once edited, it's reason. If a skip
1172 should be produced its reason. Otherwise CONFLICT_REASON_NONE for no tree
1173 conflict.
1174
1175 Special values:
1176 CONFLICT_REASON_SKIP:
1177 The node will be skipped with content and property state as stored in
1178 SKIP_REASON.
1179
1180 CONFLICT_REASON_SKIP_WC:
1181 The node will be skipped as an obstructing working copy.
1182 */
1183 svn_wc_conflict_reason_t tree_conflict_reason;
1184 svn_wc_conflict_action_t tree_conflict_action;
1185
1186 /* When TREE_CONFLICT_REASON is CONFLICT_REASON_SKIP, the skip state to
1187 add to the notification */
1188 svn_wc_notify_state_t skip_reason;
1189
1190 /* TRUE if the node was added by this merge. Otherwise FALSE */
1191 svn_boolean_t added;
1192 svn_boolean_t add_is_replace; /* Add is second part of replace */
1193
1194 /* TRUE if we are taking over an existing directory as addition, otherwise
1195 FALSE. */
1196 svn_boolean_t add_existing;
1197
1198 /* NULL, or an hashtable mapping const char * local_abspaths to
1199 const char *kind mapping, containing deleted nodes that still need a delete
1200 notification (which may be a replaced notification if the node is not just
1201 deleted) */
1202 apr_hash_t *pending_deletes;
1203
1204 /* NULL, or an hashtable mapping const char * LOCAL_ABSPATHs to
1205 a const svn_wc_conflict_description2_t * instance, describing the just
1206 installed conflict */
1207 apr_hash_t *new_tree_conflicts;
1208
1209 /* If not NULL, a reference to the information of the delete test that is
1210 currently in progress. Allocated in the root-directory baton, referenced
1211 from all descendants */
1212 struct dir_delete_baton_t *delete_state;
1213 };
1214
1215 /* Baton for the merge_dir_*() functions. Initialized in merge_file_opened() */
1216 struct merge_file_baton_t
1217 {
1218 /* Reference to the parent baton, unless the parent is the anchor, in which
1219 case PARENT_BATON is NULL */
1220 struct merge_dir_baton_t *parent_baton;
1221
1222 /* This file doesn't have a representation in the working copy, so any
1223 operation on it will be skipped and possibly cause a tree conflict
1224 on the shadow root */
1225 svn_boolean_t shadowed;
1226
1227 /* This node received operational changes from the merge. If this node
1228 is the shadow root its tree conflict status has been applied */
1229 svn_boolean_t edited;
1230
1231 /* If a tree conflict will be installed once edited, it's reason. If a skip
1232 should be produced its reason. Some special values are defined. See the
1233 merge_tree_baton_t for an explanation. */
1234 svn_wc_conflict_reason_t tree_conflict_reason;
1235 svn_wc_conflict_action_t tree_conflict_action;
1236
1237 /* When TREE_CONFLICT_REASON is CONFLICT_REASON_SKIP, the skip state to
1238 add to the notification */
1239 svn_wc_notify_state_t skip_reason;
1240
1241 /* TRUE if the node was added by this merge. Otherwise FALSE */
1242 svn_boolean_t added;
1243 svn_boolean_t add_is_replace; /* Add is second part of replace */
1244 };
1245
1246 /* Forward declaration */
1247 static svn_error_t *
1248 notify_merge_begin(merge_cmd_baton_t *merge_b,
1249 const char *local_abspath,
1250 svn_boolean_t delete_action,
1251 apr_pool_t *scratch_pool);
1252
1253 /* Record the skip for future processing and (later) produce the
1254 skip notification */
1255 static svn_error_t *
record_skip(merge_cmd_baton_t * merge_b,const char * local_abspath,svn_node_kind_t kind,svn_wc_notify_action_t action,svn_wc_notify_state_t state,apr_pool_t * scratch_pool)1256 record_skip(merge_cmd_baton_t *merge_b,
1257 const char *local_abspath,
1258 svn_node_kind_t kind,
1259 svn_wc_notify_action_t action,
1260 svn_wc_notify_state_t state,
1261 apr_pool_t *scratch_pool)
1262 {
1263 if (merge_b->record_only)
1264 return SVN_NO_ERROR; /* ### Why? - Legacy compatibility */
1265
1266 if (merge_b->merge_source.ancestral
1267 || merge_b->reintegrate_merge)
1268 {
1269 store_path(merge_b->skipped_abspaths, local_abspath);
1270 }
1271
1272 if (merge_b->ctx->notify_func2)
1273 {
1274 svn_wc_notify_t *notify;
1275
1276 SVN_ERR(notify_merge_begin(merge_b, local_abspath, FALSE, scratch_pool));
1277
1278 notify = svn_wc_create_notify(local_abspath, action, scratch_pool);
1279 notify->kind = kind;
1280 notify->content_state = notify->prop_state = state;
1281
1282 (*merge_b->ctx->notify_func2)(merge_b->ctx->notify_baton2, notify,
1283 scratch_pool);
1284 }
1285 return SVN_NO_ERROR;
1286 }
1287
1288 /* Record a tree conflict in the WC, unless this is a dry run or a record-
1289 * only merge, or if a tree conflict is already flagged for the VICTIM_PATH.
1290 * (The latter can happen if a merge-tracking-aware merge is doing multiple
1291 * editor drives because of a gap in the range of eligible revisions.)
1292 *
1293 * The tree conflict, with its victim specified by VICTIM_PATH, is
1294 * assumed to have happened during a merge using merge baton MERGE_B.
1295 *
1296 * NODE_KIND must be the node kind of "old" and "theirs" and "mine";
1297 * this function cannot cope with node kind clashes.
1298 * ACTION and REASON correspond to the fields
1299 * of the same names in svn_wc_tree_conflict_description_t.
1300 */
1301 static svn_error_t *
record_tree_conflict(merge_cmd_baton_t * merge_b,const char * local_abspath,struct merge_dir_baton_t * parent_baton,svn_node_kind_t node_kind,svn_wc_conflict_action_t action,svn_wc_conflict_reason_t reason,const svn_wc_conflict_description2_t * existing_conflict,svn_boolean_t notify_tc,apr_pool_t * scratch_pool)1302 record_tree_conflict(merge_cmd_baton_t *merge_b,
1303 const char *local_abspath,
1304 struct merge_dir_baton_t *parent_baton,
1305 svn_node_kind_t node_kind,
1306 svn_wc_conflict_action_t action,
1307 svn_wc_conflict_reason_t reason,
1308 const svn_wc_conflict_description2_t *existing_conflict,
1309 svn_boolean_t notify_tc,
1310 apr_pool_t *scratch_pool)
1311 {
1312 svn_wc_context_t *wc_ctx = merge_b->ctx->wc_ctx;
1313
1314 if (merge_b->record_only)
1315 return SVN_NO_ERROR;
1316
1317 if (merge_b->merge_source.ancestral
1318 || merge_b->reintegrate_merge)
1319 {
1320 store_path(merge_b->tree_conflicted_abspaths, local_abspath);
1321 }
1322
1323 alloc_and_store_path(&merge_b->conflicted_paths, local_abspath,
1324 merge_b->pool);
1325
1326 if (!merge_b->dry_run)
1327 {
1328 svn_wc_conflict_description2_t *conflict;
1329 const svn_wc_conflict_version_t *left;
1330 const svn_wc_conflict_version_t *right;
1331 apr_pool_t *result_pool = parent_baton ? parent_baton->pool
1332 : scratch_pool;
1333
1334 if (reason == svn_wc_conflict_reason_deleted)
1335 {
1336 const char *moved_to_abspath;
1337
1338 SVN_ERR(svn_wc__node_was_moved_away(&moved_to_abspath, NULL,
1339 wc_ctx, local_abspath,
1340 scratch_pool, scratch_pool));
1341
1342 if (moved_to_abspath)
1343 {
1344 /* Local abspath itself has been moved away. If only a
1345 descendant is moved away, we call the node itself deleted */
1346 reason = svn_wc_conflict_reason_moved_away;
1347 }
1348 }
1349 else if (reason == svn_wc_conflict_reason_added)
1350 {
1351 const char *moved_from_abspath;
1352 SVN_ERR(svn_wc__node_was_moved_here(&moved_from_abspath, NULL,
1353 wc_ctx, local_abspath,
1354 scratch_pool, scratch_pool));
1355 if (moved_from_abspath)
1356 reason = svn_wc_conflict_reason_moved_here;
1357 }
1358
1359 SVN_ERR(make_conflict_versions(&left, &right, local_abspath, node_kind,
1360 &merge_b->merge_source, merge_b->target,
1361 result_pool, scratch_pool));
1362
1363 /* Fix up delete of file, add of dir replacement (or other way around) */
1364 if (existing_conflict != NULL && existing_conflict->src_left_version)
1365 left = existing_conflict->src_left_version;
1366
1367 conflict = svn_wc_conflict_description_create_tree2(
1368 local_abspath, node_kind, svn_wc_operation_merge,
1369 left, right, result_pool);
1370
1371 conflict->action = action;
1372 conflict->reason = reason;
1373
1374 /* May return SVN_ERR_WC_PATH_UNEXPECTED_STATUS */
1375 if (existing_conflict)
1376 SVN_ERR(svn_wc__del_tree_conflict(wc_ctx, local_abspath,
1377 scratch_pool));
1378
1379 SVN_ERR(svn_wc__add_tree_conflict(merge_b->ctx->wc_ctx, conflict,
1380 scratch_pool));
1381
1382 if (parent_baton)
1383 {
1384 if (! parent_baton->new_tree_conflicts)
1385 parent_baton->new_tree_conflicts = apr_hash_make(result_pool);
1386
1387 svn_hash_sets(parent_baton->new_tree_conflicts,
1388 apr_pstrdup(result_pool, local_abspath),
1389 conflict);
1390 }
1391
1392 /* ### TODO: Store in parent baton */
1393 }
1394
1395 /* On a replacement we currently get two tree conflicts */
1396 if (merge_b->ctx->notify_func2 && notify_tc)
1397 {
1398 svn_wc_notify_t *notify;
1399
1400 SVN_ERR(notify_merge_begin(merge_b, local_abspath, FALSE, scratch_pool));
1401
1402 notify = svn_wc_create_notify(local_abspath, svn_wc_notify_tree_conflict,
1403 scratch_pool);
1404 notify->kind = node_kind;
1405
1406 (*merge_b->ctx->notify_func2)(merge_b->ctx->notify_baton2, notify,
1407 scratch_pool);
1408 }
1409
1410 return SVN_NO_ERROR;
1411 }
1412
1413 /* Record the add for future processing and produce the
1414 update_add notification
1415 */
1416 static svn_error_t *
record_update_add(merge_cmd_baton_t * merge_b,const char * local_abspath,svn_node_kind_t kind,svn_boolean_t notify_replaced,apr_pool_t * scratch_pool)1417 record_update_add(merge_cmd_baton_t *merge_b,
1418 const char *local_abspath,
1419 svn_node_kind_t kind,
1420 svn_boolean_t notify_replaced,
1421 apr_pool_t *scratch_pool)
1422 {
1423 if (merge_b->merge_source.ancestral || merge_b->reintegrate_merge)
1424 {
1425 store_path(merge_b->merged_abspaths, local_abspath);
1426 }
1427
1428 if (merge_b->ctx->notify_func2)
1429 {
1430 svn_wc_notify_t *notify;
1431 svn_wc_notify_action_t action = svn_wc_notify_update_add;
1432
1433 SVN_ERR(notify_merge_begin(merge_b, local_abspath, FALSE, scratch_pool));
1434
1435 if (notify_replaced)
1436 action = svn_wc_notify_update_replace;
1437
1438 notify = svn_wc_create_notify(local_abspath, action, scratch_pool);
1439 notify->kind = kind;
1440
1441 (*merge_b->ctx->notify_func2)(merge_b->ctx->notify_baton2, notify,
1442 scratch_pool);
1443 }
1444
1445 return SVN_NO_ERROR;
1446 }
1447
1448 /* Record the update for future processing and produce the
1449 update_update notification */
1450 static svn_error_t *
record_update_update(merge_cmd_baton_t * merge_b,const char * local_abspath,svn_node_kind_t kind,svn_wc_notify_state_t content_state,svn_wc_notify_state_t prop_state,apr_pool_t * scratch_pool)1451 record_update_update(merge_cmd_baton_t *merge_b,
1452 const char *local_abspath,
1453 svn_node_kind_t kind,
1454 svn_wc_notify_state_t content_state,
1455 svn_wc_notify_state_t prop_state,
1456 apr_pool_t *scratch_pool)
1457 {
1458 if (merge_b->merge_source.ancestral || merge_b->reintegrate_merge)
1459 {
1460 store_path(merge_b->merged_abspaths, local_abspath);
1461 }
1462
1463 if (merge_b->ctx->notify_func2)
1464 {
1465 svn_wc_notify_t *notify;
1466
1467 SVN_ERR(notify_merge_begin(merge_b, local_abspath, FALSE, scratch_pool));
1468
1469 notify = svn_wc_create_notify(local_abspath, svn_wc_notify_update_update,
1470 scratch_pool);
1471 notify->kind = kind;
1472 notify->content_state = content_state;
1473 notify->prop_state = prop_state;
1474
1475 (*merge_b->ctx->notify_func2)(merge_b->ctx->notify_baton2, notify,
1476 scratch_pool);
1477 }
1478
1479 return SVN_NO_ERROR;
1480 }
1481
1482 /* Record the delete for future processing and for (later) producing the
1483 update_delete notification */
1484 static svn_error_t *
record_update_delete(merge_cmd_baton_t * merge_b,struct merge_dir_baton_t * parent_db,const char * local_abspath,svn_node_kind_t kind,apr_pool_t * scratch_pool)1485 record_update_delete(merge_cmd_baton_t *merge_b,
1486 struct merge_dir_baton_t *parent_db,
1487 const char *local_abspath,
1488 svn_node_kind_t kind,
1489 apr_pool_t *scratch_pool)
1490 {
1491 /* Update the lists of merged, skipped, tree-conflicted and added paths. */
1492 if (merge_b->merge_source.ancestral
1493 || merge_b->reintegrate_merge)
1494 {
1495 /* Issue #4166: If a previous merge added NOTIFY_ABSPATH, but we
1496 are now deleting it, then remove it from the list of added
1497 paths. */
1498 svn_hash_sets(merge_b->added_abspaths, local_abspath, NULL);
1499 store_path(merge_b->merged_abspaths, local_abspath);
1500 }
1501
1502 SVN_ERR(notify_merge_begin(merge_b, local_abspath, TRUE, scratch_pool));
1503
1504 if (parent_db)
1505 {
1506 const char *dup_abspath = apr_pstrdup(parent_db->pool, local_abspath);
1507
1508 if (!parent_db->pending_deletes)
1509 parent_db->pending_deletes = apr_hash_make(parent_db->pool);
1510
1511 svn_hash_sets(parent_db->pending_deletes, dup_abspath,
1512 svn_node_kind_to_word(kind));
1513 }
1514
1515 return SVN_NO_ERROR;
1516 }
1517
1518 /* Notify the pending 'D'eletes, that were waiting to see if a matching 'A'dd
1519 might make them a 'R'eplace. */
1520 static svn_error_t *
handle_pending_notifications(merge_cmd_baton_t * merge_b,struct merge_dir_baton_t * db,apr_pool_t * scratch_pool)1521 handle_pending_notifications(merge_cmd_baton_t *merge_b,
1522 struct merge_dir_baton_t *db,
1523 apr_pool_t *scratch_pool)
1524 {
1525 if (merge_b->ctx->notify_func2 && db->pending_deletes)
1526 {
1527 apr_hash_index_t *hi;
1528
1529 for (hi = apr_hash_first(scratch_pool, db->pending_deletes);
1530 hi;
1531 hi = apr_hash_next(hi))
1532 {
1533 const char *del_abspath = svn__apr_hash_index_key(hi);
1534 svn_wc_notify_t *notify;
1535
1536 notify = svn_wc_create_notify(del_abspath,
1537 svn_wc_notify_update_delete,
1538 scratch_pool);
1539 notify->kind = svn_node_kind_from_word(
1540 svn__apr_hash_index_val(hi));
1541
1542 (*merge_b->ctx->notify_func2)(merge_b->ctx->notify_baton2,
1543 notify, scratch_pool);
1544 }
1545
1546 db->pending_deletes = NULL;
1547 }
1548 return SVN_NO_ERROR;
1549 }
1550
1551 /* Helper function for the merge_dir_*() and merge_file_*() functions.
1552
1553 Installs and notifies pre-recorded tree conflicts and skips for
1554 ancestors of operational merges
1555 */
1556 static svn_error_t *
mark_dir_edited(merge_cmd_baton_t * merge_b,struct merge_dir_baton_t * db,const char * local_abspath,apr_pool_t * scratch_pool)1557 mark_dir_edited(merge_cmd_baton_t *merge_b,
1558 struct merge_dir_baton_t *db,
1559 const char *local_abspath,
1560 apr_pool_t *scratch_pool)
1561 {
1562 /* ### Too much common code with mark_file_edited */
1563 if (db->edited)
1564 return SVN_NO_ERROR;
1565
1566 if (db->parent_baton && !db->parent_baton->edited)
1567 {
1568 const char *dir_abspath = svn_dirent_dirname(local_abspath,
1569 scratch_pool);
1570
1571 SVN_ERR(mark_dir_edited(merge_b, db->parent_baton, dir_abspath,
1572 scratch_pool));
1573 }
1574
1575 db->edited = TRUE;
1576
1577 if (! db->shadowed)
1578 return SVN_NO_ERROR; /* Easy out */
1579
1580 if (db->parent_baton
1581 && db->parent_baton->delete_state
1582 && db->tree_conflict_reason != CONFLICT_REASON_NONE)
1583 {
1584 db->parent_baton->delete_state->found_edit = TRUE;
1585 }
1586 else if (db->tree_conflict_reason == CONFLICT_REASON_SKIP
1587 || db->tree_conflict_reason == CONFLICT_REASON_SKIP_WC)
1588 {
1589 /* open_directory() decided not to flag a tree conflict, but
1590 for clarity we produce a skip for this node that
1591 most likely isn't touched by the merge itself */
1592
1593 if (merge_b->ctx->notify_func2)
1594 {
1595 svn_wc_notify_t *notify;
1596
1597 SVN_ERR(notify_merge_begin(merge_b, local_abspath, FALSE,
1598 scratch_pool));
1599
1600 notify = svn_wc_create_notify(
1601 local_abspath,
1602 (db->tree_conflict_reason == CONFLICT_REASON_SKIP)
1603 ? svn_wc_notify_skip
1604 : svn_wc_notify_update_skip_obstruction,
1605 scratch_pool);
1606 notify->kind = svn_node_dir;
1607 notify->content_state = notify->prop_state = db->skip_reason;
1608
1609 (*merge_b->ctx->notify_func2)(merge_b->ctx->notify_baton2,
1610 notify,
1611 scratch_pool);
1612 }
1613
1614 if (merge_b->merge_source.ancestral
1615 || merge_b->reintegrate_merge)
1616 {
1617 store_path(merge_b->skipped_abspaths, local_abspath);
1618 }
1619 }
1620 else if (db->tree_conflict_reason != CONFLICT_REASON_NONE)
1621 {
1622 /* open_directory() decided that a tree conflict should be raised */
1623
1624 SVN_ERR(record_tree_conflict(merge_b, local_abspath, db->parent_baton,
1625 svn_node_dir, db->tree_conflict_action,
1626 db->tree_conflict_reason,
1627 NULL, TRUE,
1628 scratch_pool));
1629 }
1630
1631 return SVN_NO_ERROR;
1632 }
1633
1634 /* Helper function for the merge_file_*() functions.
1635
1636 Installs and notifies pre-recorded tree conflicts and skips for
1637 ancestors of operational merges
1638 */
1639 static svn_error_t *
mark_file_edited(merge_cmd_baton_t * merge_b,struct merge_file_baton_t * fb,const char * local_abspath,apr_pool_t * scratch_pool)1640 mark_file_edited(merge_cmd_baton_t *merge_b,
1641 struct merge_file_baton_t *fb,
1642 const char *local_abspath,
1643 apr_pool_t *scratch_pool)
1644 {
1645 /* ### Too much common code with mark_dir_edited */
1646 if (fb->edited)
1647 return SVN_NO_ERROR;
1648
1649 if (fb->parent_baton && !fb->parent_baton->edited)
1650 {
1651 const char *dir_abspath = svn_dirent_dirname(local_abspath,
1652 scratch_pool);
1653
1654 SVN_ERR(mark_dir_edited(merge_b, fb->parent_baton, dir_abspath,
1655 scratch_pool));
1656 }
1657
1658 fb->edited = TRUE;
1659
1660 if (! fb->shadowed)
1661 return SVN_NO_ERROR; /* Easy out */
1662
1663 if (fb->parent_baton
1664 && fb->parent_baton->delete_state
1665 && fb->tree_conflict_reason != CONFLICT_REASON_NONE)
1666 {
1667 fb->parent_baton->delete_state->found_edit = TRUE;
1668 }
1669 else if (fb->tree_conflict_reason == CONFLICT_REASON_SKIP
1670 || fb->tree_conflict_reason == CONFLICT_REASON_SKIP_WC)
1671 {
1672 /* open_directory() decided not to flag a tree conflict, but
1673 for clarity we produce a skip for this node that
1674 most likely isn't touched by the merge itself */
1675
1676 if (merge_b->ctx->notify_func2)
1677 {
1678 svn_wc_notify_t *notify;
1679
1680 SVN_ERR(notify_merge_begin(merge_b, local_abspath, FALSE,
1681 scratch_pool));
1682
1683 notify = svn_wc_create_notify(local_abspath, svn_wc_notify_skip,
1684 scratch_pool);
1685 notify->kind = svn_node_file;
1686 notify->content_state = notify->prop_state = fb->skip_reason;
1687
1688 (*merge_b->ctx->notify_func2)(merge_b->ctx->notify_baton2,
1689 notify,
1690 scratch_pool);
1691 }
1692
1693 if (merge_b->merge_source.ancestral
1694 || merge_b->reintegrate_merge)
1695 {
1696 store_path(merge_b->skipped_abspaths, local_abspath);
1697 }
1698 }
1699 else if (fb->tree_conflict_reason != CONFLICT_REASON_NONE)
1700 {
1701 /* open_file() decided that a tree conflict should be raised */
1702
1703 SVN_ERR(record_tree_conflict(merge_b, local_abspath, fb->parent_baton,
1704 svn_node_file, fb->tree_conflict_action,
1705 fb->tree_conflict_reason,
1706 NULL, TRUE,
1707 scratch_pool));
1708 }
1709
1710 return SVN_NO_ERROR;
1711 }
1712
1713 /* An svn_diff_tree_processor_t function.
1714
1715 Called before either merge_file_changed(), merge_file_added(),
1716 merge_file_deleted() or merge_file_closed(), unless it sets *SKIP to TRUE.
1717
1718 When *SKIP is TRUE, the diff driver avoids work on getting the details
1719 for the closing callbacks.
1720 */
1721 static svn_error_t *
merge_file_opened(void ** new_file_baton,svn_boolean_t * skip,const char * relpath,const svn_diff_source_t * left_source,const svn_diff_source_t * right_source,const svn_diff_source_t * copyfrom_source,void * dir_baton,const struct svn_diff_tree_processor_t * processor,apr_pool_t * result_pool,apr_pool_t * scratch_pool)1722 merge_file_opened(void **new_file_baton,
1723 svn_boolean_t *skip,
1724 const char *relpath,
1725 const svn_diff_source_t *left_source,
1726 const svn_diff_source_t *right_source,
1727 const svn_diff_source_t *copyfrom_source,
1728 void *dir_baton,
1729 const struct svn_diff_tree_processor_t *processor,
1730 apr_pool_t *result_pool,
1731 apr_pool_t *scratch_pool)
1732 {
1733 merge_cmd_baton_t *merge_b = processor->baton;
1734 struct merge_dir_baton_t *pdb = dir_baton;
1735 struct merge_file_baton_t *fb;
1736 const char *local_abspath = svn_dirent_join(merge_b->target->abspath,
1737 relpath, scratch_pool);
1738
1739 fb = apr_pcalloc(result_pool, sizeof(*fb));
1740 fb->tree_conflict_reason = CONFLICT_REASON_NONE;
1741 fb->tree_conflict_action = svn_wc_conflict_action_edit;
1742 fb->skip_reason = svn_wc_notify_state_unknown;
1743
1744 *new_file_baton = fb;
1745
1746 if (pdb)
1747 {
1748 fb->parent_baton = pdb;
1749 fb->shadowed = pdb->shadowed;
1750 fb->skip_reason = pdb->skip_reason;
1751 }
1752
1753 if (fb->shadowed)
1754 {
1755 /* An ancestor is tree conflicted. Nothing to do here. */
1756 }
1757 else if (left_source != NULL)
1758 {
1759 /* Node is expected to be a file, which will be changed or deleted. */
1760 svn_node_kind_t kind;
1761 svn_boolean_t is_deleted;
1762 svn_boolean_t excluded;
1763 svn_depth_t parent_depth;
1764
1765 if (! right_source)
1766 fb->tree_conflict_action = svn_wc_conflict_action_delete;
1767
1768 {
1769 svn_wc_notify_state_t obstr_state;
1770
1771 SVN_ERR(perform_obstruction_check(&obstr_state, &is_deleted, &excluded,
1772 &kind, &parent_depth,
1773 merge_b, local_abspath,
1774 scratch_pool));
1775
1776 if (obstr_state != svn_wc_notify_state_inapplicable)
1777 {
1778 fb->shadowed = TRUE;
1779 fb->tree_conflict_reason = CONFLICT_REASON_SKIP;
1780 fb->skip_reason = obstr_state;
1781 return SVN_NO_ERROR;
1782 }
1783
1784 if (is_deleted)
1785 kind = svn_node_none;
1786 }
1787
1788 if (kind == svn_node_none)
1789 {
1790 fb->shadowed = TRUE;
1791
1792 /* If this is not the merge target and the parent is too shallow to
1793 contain this directory, and the directory is not present
1794 via exclusion or depth filtering, skip it instead of recording
1795 a tree conflict.
1796
1797 Non-inheritable mergeinfo will be recorded, allowing
1798 future merges into non-shallow working copies to merge
1799 changes we missed this time around. */
1800 if (pdb && (excluded
1801 || (parent_depth != svn_depth_unknown &&
1802 parent_depth < svn_depth_files)))
1803 {
1804 fb->shadowed = TRUE;
1805
1806 fb->tree_conflict_reason = CONFLICT_REASON_SKIP;
1807 fb->skip_reason = svn_wc_notify_state_missing;
1808 return SVN_NO_ERROR;
1809 }
1810
1811 if (is_deleted)
1812 fb->tree_conflict_reason = svn_wc_conflict_reason_deleted;
1813 else
1814 fb->tree_conflict_reason = svn_wc_conflict_reason_missing;
1815
1816 /* ### Similar to directory */
1817 *skip = TRUE;
1818 SVN_ERR(mark_file_edited(merge_b, fb, local_abspath, scratch_pool));
1819 return SVN_NO_ERROR;
1820 /* ### /Similar */
1821 }
1822 else if (kind != svn_node_file)
1823 {
1824 fb->shadowed = TRUE;
1825
1826 fb->tree_conflict_reason = svn_wc_conflict_reason_obstructed;
1827
1828 /* ### Similar to directory */
1829 *skip = TRUE;
1830 SVN_ERR(mark_file_edited(merge_b, fb, local_abspath, scratch_pool));
1831 return SVN_NO_ERROR;
1832 /* ### /Similar */
1833 }
1834
1835 if (! right_source)
1836 {
1837 /* We want to delete the directory */
1838 fb->tree_conflict_action = svn_wc_conflict_action_delete;
1839 SVN_ERR(mark_file_edited(merge_b, fb, local_abspath, scratch_pool));
1840
1841 if (fb->shadowed)
1842 {
1843 return SVN_NO_ERROR; /* Already set a tree conflict */
1844 }
1845
1846 /* Comparison mode to verify for delete tree conflicts? */
1847 if (pdb && pdb->delete_state
1848 && pdb->delete_state->found_edit)
1849 {
1850 /* Earlier nodes found a conflict. Done. */
1851 *skip = TRUE;
1852 }
1853 }
1854 }
1855 else
1856 {
1857 const svn_wc_conflict_description2_t *old_tc = NULL;
1858
1859 /* The node doesn't exist pre-merge: We have an addition */
1860 fb->added = TRUE;
1861 fb->tree_conflict_action = svn_wc_conflict_action_add;
1862
1863 if (pdb && pdb->pending_deletes
1864 && svn_hash_gets(pdb->pending_deletes, local_abspath))
1865 {
1866 fb->add_is_replace = TRUE;
1867 fb->tree_conflict_action = svn_wc_conflict_action_replace;
1868
1869 svn_hash_sets(pdb->pending_deletes, local_abspath, NULL);
1870 }
1871
1872 if (pdb
1873 && pdb->new_tree_conflicts
1874 && (old_tc = svn_hash_gets(pdb->new_tree_conflicts, local_abspath)))
1875 {
1876 fb->tree_conflict_action = svn_wc_conflict_action_replace;
1877 fb->tree_conflict_reason = old_tc->reason;
1878
1879 /* Update the tree conflict to store that this is a replace */
1880 SVN_ERR(record_tree_conflict(merge_b, local_abspath, pdb,
1881 svn_node_file,
1882 fb->tree_conflict_action,
1883 fb->tree_conflict_reason,
1884 old_tc, FALSE,
1885 scratch_pool));
1886
1887 if (old_tc->reason == svn_wc_conflict_reason_deleted
1888 || old_tc->reason == svn_wc_conflict_reason_moved_away)
1889 {
1890 /* Issue #3806: Incoming replacements on local deletes produce
1891 inconsistent result.
1892
1893 In this specific case we can continue applying the add part
1894 of the replacement. */
1895 }
1896 else
1897 {
1898 *skip = TRUE;
1899
1900 return SVN_NO_ERROR;
1901 }
1902 }
1903 else if (! (merge_b->dry_run
1904 && ((pdb && pdb->added) || fb->add_is_replace)))
1905 {
1906 svn_wc_notify_state_t obstr_state;
1907 svn_node_kind_t kind;
1908 svn_boolean_t is_deleted;
1909
1910 SVN_ERR(perform_obstruction_check(&obstr_state, &is_deleted, NULL,
1911 &kind, NULL,
1912 merge_b, local_abspath,
1913 scratch_pool));
1914
1915 if (obstr_state != svn_wc_notify_state_inapplicable)
1916 {
1917 /* Skip the obstruction */
1918 fb->shadowed = TRUE;
1919 fb->tree_conflict_reason = CONFLICT_REASON_SKIP;
1920 fb->skip_reason = obstr_state;
1921 }
1922 else if (kind != svn_node_none && !is_deleted)
1923 {
1924 /* Set a tree conflict */
1925 fb->shadowed = TRUE;
1926 fb->tree_conflict_reason = svn_wc_conflict_reason_obstructed;
1927 }
1928 }
1929
1930 /* Handle pending conflicts */
1931 SVN_ERR(mark_file_edited(merge_b, fb, local_abspath, scratch_pool));
1932 }
1933
1934 return SVN_NO_ERROR;
1935 }
1936
1937 /* An svn_diff_tree_processor_t function.
1938 *
1939 * Called after merge_file_opened() when a node receives only text and/or
1940 * property changes between LEFT_SOURCE and RIGHT_SOURCE.
1941 *
1942 * left_file and right_file can be NULL when the file is not modified.
1943 * left_props and right_props are always available.
1944 */
1945 static svn_error_t *
merge_file_changed(const char * relpath,const svn_diff_source_t * left_source,const svn_diff_source_t * right_source,const char * left_file,const char * right_file,apr_hash_t * left_props,apr_hash_t * right_props,svn_boolean_t file_modified,const apr_array_header_t * prop_changes,void * file_baton,const struct svn_diff_tree_processor_t * processor,apr_pool_t * scratch_pool)1946 merge_file_changed(const char *relpath,
1947 const svn_diff_source_t *left_source,
1948 const svn_diff_source_t *right_source,
1949 const char *left_file,
1950 const char *right_file,
1951 /*const*/ apr_hash_t *left_props,
1952 /*const*/ apr_hash_t *right_props,
1953 svn_boolean_t file_modified,
1954 const apr_array_header_t *prop_changes,
1955 void *file_baton,
1956 const struct svn_diff_tree_processor_t *processor,
1957 apr_pool_t *scratch_pool)
1958 {
1959 merge_cmd_baton_t *merge_b = processor->baton;
1960 struct merge_file_baton_t *fb = file_baton;
1961 svn_client_ctx_t *ctx = merge_b->ctx;
1962 const char *local_abspath = svn_dirent_join(merge_b->target->abspath,
1963 relpath, scratch_pool);
1964 const svn_wc_conflict_version_t *left;
1965 const svn_wc_conflict_version_t *right;
1966 svn_wc_notify_state_t text_state;
1967 svn_wc_notify_state_t property_state;
1968
1969 SVN_ERR_ASSERT(local_abspath && svn_dirent_is_absolute(local_abspath));
1970 SVN_ERR_ASSERT(!left_file || svn_dirent_is_absolute(left_file));
1971 SVN_ERR_ASSERT(!right_file || svn_dirent_is_absolute(right_file));
1972
1973 SVN_ERR(mark_file_edited(merge_b, fb, local_abspath, scratch_pool));
1974
1975 if (fb->shadowed)
1976 {
1977 if (fb->tree_conflict_reason == CONFLICT_REASON_NONE)
1978 {
1979 /* We haven't notified for this node yet: report a skip */
1980 SVN_ERR(record_skip(merge_b, local_abspath, svn_node_file,
1981 svn_wc_notify_update_shadowed_update,
1982 fb->skip_reason, scratch_pool));
1983 }
1984
1985 return SVN_NO_ERROR;
1986 }
1987
1988 /* This callback is essentially no more than a wrapper around
1989 svn_wc_merge5(). Thank goodness that all the
1990 diff-editor-mechanisms are doing the hard work of getting the
1991 fulltexts! */
1992
1993 property_state = svn_wc_notify_state_unchanged;
1994 text_state = svn_wc_notify_state_unchanged;
1995
1996 SVN_ERR(prepare_merge_props_changed(&prop_changes, local_abspath,
1997 prop_changes, merge_b,
1998 scratch_pool, scratch_pool));
1999
2000 SVN_ERR(make_conflict_versions(&left, &right, local_abspath,
2001 svn_node_file, &merge_b->merge_source, merge_b->target,
2002 scratch_pool, scratch_pool));
2003
2004 /* Do property merge now, if we are not going to perform a text merge */
2005 if ((merge_b->record_only || !left_file) && prop_changes->nelts)
2006 {
2007 SVN_ERR(svn_wc_merge_props3(&property_state, ctx->wc_ctx, local_abspath,
2008 left, right,
2009 left_props, prop_changes,
2010 merge_b->dry_run,
2011 NULL, NULL,
2012 ctx->cancel_func, ctx->cancel_baton,
2013 scratch_pool));
2014 if (property_state == svn_wc_notify_state_conflicted)
2015 {
2016 alloc_and_store_path(&merge_b->conflicted_paths, local_abspath,
2017 merge_b->pool);
2018 }
2019 }
2020
2021 /* Easy out: We are only applying mergeinfo differences. */
2022 if (merge_b->record_only)
2023 {
2024 /* NO-OP */
2025 }
2026 else if (left_file)
2027 {
2028 svn_boolean_t has_local_mods;
2029 enum svn_wc_merge_outcome_t content_outcome;
2030 const char *target_label;
2031 const char *left_label;
2032 const char *right_label;
2033 const char *path_ext = "";
2034
2035 if (merge_b->ext_patterns && merge_b->ext_patterns->nelts)
2036 {
2037 svn_path_splitext(NULL, &path_ext, local_abspath, scratch_pool);
2038 if (! (*path_ext
2039 && svn_cstring_match_glob_list(path_ext,
2040 merge_b->ext_patterns)))
2041 {
2042 path_ext = "";
2043 }
2044 }
2045
2046 /* xgettext: the '.working', '.merge-left.r%ld' and
2047 '.merge-right.r%ld' strings are used to tag onto a file
2048 name in case of a merge conflict */
2049
2050 target_label = apr_psprintf(scratch_pool, _(".working%s%s"),
2051 *path_ext ? "." : "", path_ext);
2052 left_label = apr_psprintf(scratch_pool,
2053 _(".merge-left.r%ld%s%s"),
2054 left_source->revision,
2055 *path_ext ? "." : "", path_ext);
2056 right_label = apr_psprintf(scratch_pool,
2057 _(".merge-right.r%ld%s%s"),
2058 right_source->revision,
2059 *path_ext ? "." : "", path_ext);
2060
2061 SVN_ERR(svn_wc_text_modified_p2(&has_local_mods, ctx->wc_ctx,
2062 local_abspath, FALSE, scratch_pool));
2063
2064 /* Do property merge and text merge in one step so that keyword expansion
2065 takes into account the new property values. */
2066 SVN_ERR(svn_wc_merge5(&content_outcome, &property_state, ctx->wc_ctx,
2067 left_file, right_file, local_abspath,
2068 left_label, right_label, target_label,
2069 left, right,
2070 merge_b->dry_run, merge_b->diff3_cmd,
2071 merge_b->merge_options,
2072 left_props, prop_changes,
2073 NULL, NULL,
2074 ctx->cancel_func,
2075 ctx->cancel_baton,
2076 scratch_pool));
2077
2078 if (content_outcome == svn_wc_merge_conflict
2079 || property_state == svn_wc_notify_state_conflicted)
2080 {
2081 alloc_and_store_path(&merge_b->conflicted_paths, local_abspath,
2082 merge_b->pool);
2083 }
2084
2085 if (content_outcome == svn_wc_merge_conflict)
2086 text_state = svn_wc_notify_state_conflicted;
2087 else if (has_local_mods
2088 && content_outcome != svn_wc_merge_unchanged)
2089 text_state = svn_wc_notify_state_merged;
2090 else if (content_outcome == svn_wc_merge_merged)
2091 text_state = svn_wc_notify_state_changed;
2092 else if (content_outcome == svn_wc_merge_no_merge)
2093 text_state = svn_wc_notify_state_missing;
2094 else /* merge_outcome == svn_wc_merge_unchanged */
2095 text_state = svn_wc_notify_state_unchanged;
2096 }
2097
2098 if (text_state == svn_wc_notify_state_conflicted
2099 || text_state == svn_wc_notify_state_merged
2100 || text_state == svn_wc_notify_state_changed
2101 || property_state == svn_wc_notify_state_conflicted
2102 || property_state == svn_wc_notify_state_merged
2103 || property_state == svn_wc_notify_state_changed)
2104 {
2105 SVN_ERR(record_update_update(merge_b, local_abspath, svn_node_file,
2106 text_state, property_state,
2107 scratch_pool));
2108 }
2109
2110 return SVN_NO_ERROR;
2111 }
2112
2113 /* An svn_diff_tree_processor_t function.
2114 *
2115 * Called after merge_file_opened() when a node doesn't exist in LEFT_SOURCE,
2116 * but does in RIGHT_SOURCE.
2117 *
2118 * When a node is replaced instead of just added a separate opened+deleted will
2119 * be invoked before the current open+added.
2120 */
2121 static svn_error_t *
merge_file_added(const char * relpath,const svn_diff_source_t * copyfrom_source,const svn_diff_source_t * right_source,const char * copyfrom_file,const char * right_file,apr_hash_t * copyfrom_props,apr_hash_t * right_props,void * file_baton,const struct svn_diff_tree_processor_t * processor,apr_pool_t * scratch_pool)2122 merge_file_added(const char *relpath,
2123 const svn_diff_source_t *copyfrom_source,
2124 const svn_diff_source_t *right_source,
2125 const char *copyfrom_file,
2126 const char *right_file,
2127 /*const*/ apr_hash_t *copyfrom_props,
2128 /*const*/ apr_hash_t *right_props,
2129 void *file_baton,
2130 const struct svn_diff_tree_processor_t *processor,
2131 apr_pool_t *scratch_pool)
2132 {
2133 merge_cmd_baton_t *merge_b = processor->baton;
2134 struct merge_file_baton_t *fb = file_baton;
2135 const char *local_abspath = svn_dirent_join(merge_b->target->abspath,
2136 relpath, scratch_pool);
2137 apr_hash_t *pristine_props;
2138 apr_hash_t *new_props;
2139
2140 SVN_ERR_ASSERT(svn_dirent_is_absolute(local_abspath));
2141
2142 SVN_ERR(mark_file_edited(merge_b, fb, local_abspath, scratch_pool));
2143
2144 if (fb->shadowed)
2145 {
2146 if (fb->tree_conflict_reason == CONFLICT_REASON_NONE)
2147 {
2148 /* We haven't notified for this node yet: report a skip */
2149 SVN_ERR(record_skip(merge_b, local_abspath, svn_node_file,
2150 svn_wc_notify_update_shadowed_add,
2151 fb->skip_reason, scratch_pool));
2152 }
2153
2154 return SVN_NO_ERROR;
2155 }
2156
2157 /* Easy out: We are only applying mergeinfo differences. */
2158 if (merge_b->record_only)
2159 {
2160 return SVN_NO_ERROR;
2161 }
2162
2163 if ((merge_b->merge_source.ancestral || merge_b->reintegrate_merge)
2164 && ( !fb->parent_baton || !fb->parent_baton->added))
2165 {
2166 /* Store the roots of added subtrees */
2167 store_path(merge_b->added_abspaths, local_abspath);
2168 }
2169
2170 if (!merge_b->dry_run)
2171 {
2172 const char *copyfrom_url;
2173 svn_revnum_t copyfrom_rev;
2174 svn_stream_t *new_contents, *pristine_contents;
2175
2176 /* If this is a merge from the same repository as our
2177 working copy, we handle adds as add-with-history.
2178 Otherwise, we'll use a pure add. */
2179 if (merge_b->same_repos)
2180 {
2181 const char *child =
2182 svn_dirent_skip_ancestor(merge_b->target->abspath,
2183 local_abspath);
2184 SVN_ERR_ASSERT(child != NULL);
2185 copyfrom_url = svn_path_url_add_component2(
2186 merge_b->merge_source.loc2->url,
2187 child, scratch_pool);
2188 copyfrom_rev = right_source->revision;
2189 SVN_ERR(check_repos_match(merge_b->target, local_abspath,
2190 copyfrom_url, scratch_pool));
2191 SVN_ERR(svn_stream_open_readonly(&pristine_contents,
2192 right_file,
2193 scratch_pool,
2194 scratch_pool));
2195 new_contents = NULL; /* inherit from new_base_contents */
2196
2197 pristine_props = right_props; /* Includes last_* information */
2198 new_props = NULL; /* No local changes */
2199
2200 if (svn_hash_gets(pristine_props, SVN_PROP_MERGEINFO))
2201 {
2202 alloc_and_store_path(&merge_b->paths_with_new_mergeinfo,
2203 local_abspath, merge_b->pool);
2204 }
2205 }
2206 else
2207 {
2208 apr_array_header_t *regular_props;
2209
2210 copyfrom_url = NULL;
2211 copyfrom_rev = SVN_INVALID_REVNUM;
2212
2213 pristine_contents = svn_stream_empty(scratch_pool);
2214 SVN_ERR(svn_stream_open_readonly(&new_contents, right_file,
2215 scratch_pool, scratch_pool));
2216
2217 pristine_props = apr_hash_make(scratch_pool); /* Local addition */
2218
2219 /* We don't want any foreign properties */
2220 SVN_ERR(svn_categorize_props(svn_prop_hash_to_array(right_props,
2221 scratch_pool),
2222 NULL, NULL, ®ular_props,
2223 scratch_pool));
2224
2225 new_props = svn_prop_array_to_hash(regular_props, scratch_pool);
2226
2227 /* Issue #3383: We don't want mergeinfo from a foreign repository. */
2228 svn_hash_sets(new_props, SVN_PROP_MERGEINFO, NULL);
2229 }
2230
2231 /* Do everything like if we had called 'svn cp PATH1 PATH2'. */
2232 SVN_ERR(svn_wc_add_repos_file4(merge_b->ctx->wc_ctx,
2233 local_abspath,
2234 pristine_contents,
2235 new_contents,
2236 pristine_props, new_props,
2237 copyfrom_url, copyfrom_rev,
2238 merge_b->ctx->cancel_func,
2239 merge_b->ctx->cancel_baton,
2240 scratch_pool));
2241
2242 /* Caller must call svn_sleep_for_timestamps() */
2243 *merge_b->use_sleep = TRUE;
2244 }
2245
2246 SVN_ERR(record_update_add(merge_b, local_abspath, svn_node_file,
2247 fb->add_is_replace, scratch_pool));
2248
2249 return SVN_NO_ERROR;
2250 }
2251
2252 /* Compare the two sets of properties PROPS1 and PROPS2, ignoring the
2253 * "svn:mergeinfo" property, and noticing only "normal" props. Set *SAME to
2254 * true if the rest of the properties are identical or false if they differ.
2255 */
2256 static svn_error_t *
properties_same_p(svn_boolean_t * same,apr_hash_t * props1,apr_hash_t * props2,apr_pool_t * scratch_pool)2257 properties_same_p(svn_boolean_t *same,
2258 apr_hash_t *props1,
2259 apr_hash_t *props2,
2260 apr_pool_t *scratch_pool)
2261 {
2262 apr_array_header_t *prop_changes;
2263 int i, diffs;
2264
2265 /* Examine the properties that differ */
2266 SVN_ERR(svn_prop_diffs(&prop_changes, props1, props2, scratch_pool));
2267 diffs = 0;
2268 for (i = 0; i < prop_changes->nelts; i++)
2269 {
2270 const char *pname = APR_ARRAY_IDX(prop_changes, i, svn_prop_t).name;
2271
2272 /* Count the properties we're interested in; ignore the rest */
2273 if (svn_wc_is_normal_prop(pname)
2274 && strcmp(pname, SVN_PROP_MERGEINFO) != 0)
2275 diffs++;
2276 }
2277 *same = (diffs == 0);
2278 return SVN_NO_ERROR;
2279 }
2280
2281 /* Compare the file OLDER_ABSPATH (together with its normal properties in
2282 * ORIGINAL_PROPS which may also contain WC props and entry props) with the
2283 * versioned file MINE_ABSPATH (together with its versioned properties).
2284 * Set *SAME to true if they are the same or false if they differ, ignoring
2285 * the "svn:mergeinfo" property, and ignoring differences in keyword
2286 * expansion and end-of-line style. */
2287 static svn_error_t *
files_same_p(svn_boolean_t * same,const char * older_abspath,apr_hash_t * original_props,const char * mine_abspath,svn_wc_context_t * wc_ctx,apr_pool_t * scratch_pool)2288 files_same_p(svn_boolean_t *same,
2289 const char *older_abspath,
2290 apr_hash_t *original_props,
2291 const char *mine_abspath,
2292 svn_wc_context_t *wc_ctx,
2293 apr_pool_t *scratch_pool)
2294 {
2295 apr_hash_t *working_props;
2296
2297 SVN_ERR(svn_wc_prop_list2(&working_props, wc_ctx, mine_abspath,
2298 scratch_pool, scratch_pool));
2299
2300 /* Compare the properties */
2301 SVN_ERR(properties_same_p(same, original_props, working_props,
2302 scratch_pool));
2303 if (*same)
2304 {
2305 svn_stream_t *mine_stream;
2306 svn_stream_t *older_stream;
2307 svn_opt_revision_t working_rev = { svn_opt_revision_working, { 0 } };
2308
2309 /* Compare the file content, translating 'mine' to 'normal' form. */
2310 if (svn_prop_get_value(working_props, SVN_PROP_SPECIAL) != NULL)
2311 SVN_ERR(svn_subst_read_specialfile(&mine_stream, mine_abspath,
2312 scratch_pool, scratch_pool));
2313 else
2314 SVN_ERR(svn_client__get_normalized_stream(&mine_stream, wc_ctx,
2315 mine_abspath, &working_rev,
2316 FALSE, TRUE, NULL, NULL,
2317 scratch_pool, scratch_pool));
2318
2319 SVN_ERR(svn_stream_open_readonly(&older_stream, older_abspath,
2320 scratch_pool, scratch_pool));
2321
2322 SVN_ERR(svn_stream_contents_same2(same, mine_stream, older_stream,
2323 scratch_pool));
2324
2325 }
2326
2327 return SVN_NO_ERROR;
2328 }
2329
2330 /* An svn_diff_tree_processor_t function.
2331 *
2332 * Called after merge_file_opened() when a node does exist in LEFT_SOURCE, but
2333 * no longer exists (or is replaced) in RIGHT_SOURCE.
2334 *
2335 * When a node is replaced instead of just added a separate opened+added will
2336 * be invoked after the current open+deleted.
2337 */
2338 static svn_error_t *
merge_file_deleted(const char * relpath,const svn_diff_source_t * left_source,const char * left_file,apr_hash_t * left_props,void * file_baton,const struct svn_diff_tree_processor_t * processor,apr_pool_t * scratch_pool)2339 merge_file_deleted(const char *relpath,
2340 const svn_diff_source_t *left_source,
2341 const char *left_file,
2342 /*const*/ apr_hash_t *left_props,
2343 void *file_baton,
2344 const struct svn_diff_tree_processor_t *processor,
2345 apr_pool_t *scratch_pool)
2346 {
2347 merge_cmd_baton_t *merge_b = processor->baton;
2348 struct merge_file_baton_t *fb = file_baton;
2349 const char *local_abspath = svn_dirent_join(merge_b->target->abspath,
2350 relpath, scratch_pool);
2351 svn_boolean_t same;
2352
2353 SVN_ERR(mark_file_edited(merge_b, fb, local_abspath, scratch_pool));
2354
2355 if (fb->shadowed)
2356 {
2357 if (fb->tree_conflict_reason == CONFLICT_REASON_NONE)
2358 {
2359 /* We haven't notified for this node yet: report a skip */
2360 SVN_ERR(record_skip(merge_b, local_abspath, svn_node_file,
2361 svn_wc_notify_update_shadowed_delete,
2362 fb->skip_reason, scratch_pool));
2363 }
2364
2365 return SVN_NO_ERROR;
2366 }
2367
2368 /* Easy out: We are only applying mergeinfo differences. */
2369 if (merge_b->record_only)
2370 {
2371 return SVN_NO_ERROR;
2372 }
2373
2374 /* If the files are identical, attempt deletion */
2375 if (merge_b->force_delete)
2376 same = TRUE;
2377 else
2378 SVN_ERR(files_same_p(&same, left_file, left_props,
2379 local_abspath, merge_b->ctx->wc_ctx,
2380 scratch_pool));
2381
2382 if (fb->parent_baton
2383 && fb->parent_baton->delete_state)
2384 {
2385 if (same)
2386 {
2387 /* Note that we checked this file */
2388 store_path(fb->parent_baton->delete_state->compared_abspaths,
2389 local_abspath);
2390 }
2391 else
2392 {
2393 /* We found some modification. Parent should raise a tree conflict */
2394 fb->parent_baton->delete_state->found_edit = TRUE;
2395 }
2396
2397 return SVN_NO_ERROR;
2398 }
2399 else if (same)
2400 {
2401 if (!merge_b->dry_run)
2402 SVN_ERR(svn_wc_delete4(merge_b->ctx->wc_ctx, local_abspath,
2403 FALSE /* keep_local */, FALSE /* unversioned */,
2404 merge_b->ctx->cancel_func,
2405 merge_b->ctx->cancel_baton,
2406 NULL, NULL /* no notify */,
2407 scratch_pool));
2408
2409 /* Record that we might have deleted mergeinfo */
2410 alloc_and_store_path(&merge_b->paths_with_deleted_mergeinfo,
2411 local_abspath, merge_b->pool);
2412
2413 /* And notify the deletion */
2414 SVN_ERR(record_update_delete(merge_b, fb->parent_baton, local_abspath,
2415 svn_node_file, scratch_pool));
2416 }
2417 else
2418 {
2419 /* The files differ, so raise a conflict instead of deleting */
2420
2421 /* This is use case 5 described in the paper attached to issue
2422 * #2282. See also notes/tree-conflicts/detection.txt
2423 */
2424 SVN_ERR(record_tree_conflict(merge_b, local_abspath, fb->parent_baton,
2425 svn_node_file,
2426 svn_wc_conflict_action_delete,
2427 svn_wc_conflict_reason_edited,
2428 NULL, TRUE,
2429 scratch_pool));
2430 }
2431
2432 return SVN_NO_ERROR;
2433 }
2434
2435 /* An svn_diff_tree_processor_t function.
2436
2437 Called before either merge_dir_changed(), merge_dir_added(),
2438 merge_dir_deleted() or merge_dir_closed(), unless it sets *SKIP to TRUE.
2439
2440 After this call and before the close call, all descendants will receive
2441 their changes, unless *SKIP_CHILDREN is set to TRUE.
2442
2443 When *SKIP is TRUE, the diff driver avoids work on getting the details
2444 for the closing callbacks.
2445
2446 The SKIP and SKIP_DESCENDANTS work independantly.
2447 */
2448 static svn_error_t *
merge_dir_opened(void ** new_dir_baton,svn_boolean_t * skip,svn_boolean_t * skip_children,const char * relpath,const svn_diff_source_t * left_source,const svn_diff_source_t * right_source,const svn_diff_source_t * copyfrom_source,void * parent_dir_baton,const struct svn_diff_tree_processor_t * processor,apr_pool_t * result_pool,apr_pool_t * scratch_pool)2449 merge_dir_opened(void **new_dir_baton,
2450 svn_boolean_t *skip,
2451 svn_boolean_t *skip_children,
2452 const char *relpath,
2453 const svn_diff_source_t *left_source,
2454 const svn_diff_source_t *right_source,
2455 const svn_diff_source_t *copyfrom_source,
2456 void *parent_dir_baton,
2457 const struct svn_diff_tree_processor_t *processor,
2458 apr_pool_t *result_pool,
2459 apr_pool_t *scratch_pool)
2460 {
2461 merge_cmd_baton_t *merge_b = processor->baton;
2462 struct merge_dir_baton_t *db;
2463 struct merge_dir_baton_t *pdb = parent_dir_baton;
2464
2465 const char *local_abspath = svn_dirent_join(merge_b->target->abspath,
2466 relpath, scratch_pool);
2467
2468 db = apr_pcalloc(result_pool, sizeof(*db));
2469 db->pool = result_pool;
2470 db->tree_conflict_reason = CONFLICT_REASON_NONE;
2471 db->tree_conflict_action = svn_wc_conflict_action_edit;
2472 db->skip_reason = svn_wc_notify_state_unknown;
2473
2474 *new_dir_baton = db;
2475
2476 if (pdb)
2477 {
2478 db->parent_baton = pdb;
2479 db->shadowed = pdb->shadowed;
2480 db->skip_reason = pdb->skip_reason;
2481 }
2482
2483 if (db->shadowed)
2484 {
2485 /* An ancestor is tree conflicted. Nothing to do here. */
2486 if (! left_source)
2487 db->added = TRUE;
2488 }
2489 else if (left_source != NULL)
2490 {
2491 /* Node is expected to be a directory. */
2492 svn_node_kind_t kind;
2493 svn_boolean_t is_deleted;
2494 svn_boolean_t excluded;
2495 svn_depth_t parent_depth;
2496
2497 if (! right_source)
2498 db->tree_conflict_action = svn_wc_conflict_action_delete;
2499
2500 /* Check for an obstructed or missing node on disk. */
2501 {
2502 svn_wc_notify_state_t obstr_state;
2503 SVN_ERR(perform_obstruction_check(&obstr_state, &is_deleted, &excluded,
2504 &kind, &parent_depth,
2505 merge_b, local_abspath,
2506 scratch_pool));
2507
2508 if (obstr_state != svn_wc_notify_state_inapplicable)
2509 {
2510 db->shadowed = TRUE;
2511
2512 if (obstr_state == svn_wc_notify_state_obstructed)
2513 {
2514 svn_boolean_t is_wcroot;
2515
2516 SVN_ERR(svn_wc_check_root(&is_wcroot, NULL, NULL,
2517 merge_b->ctx->wc_ctx,
2518 local_abspath, scratch_pool));
2519
2520 if (is_wcroot)
2521 {
2522 db->tree_conflict_reason = CONFLICT_REASON_SKIP_WC;
2523 return SVN_NO_ERROR;
2524 }
2525 }
2526
2527 db->tree_conflict_reason = CONFLICT_REASON_SKIP;
2528 db->skip_reason = obstr_state;
2529
2530 if (! right_source)
2531 {
2532 *skip = *skip_children = TRUE;
2533 SVN_ERR(mark_dir_edited(merge_b, db, local_abspath,
2534 scratch_pool));
2535 }
2536
2537 return SVN_NO_ERROR;
2538 }
2539
2540 if (is_deleted)
2541 kind = svn_node_none;
2542 }
2543
2544 if (kind == svn_node_none)
2545 {
2546 db->shadowed = TRUE;
2547
2548 /* If this is not the merge target and the parent is too shallow to
2549 contain this directory, and the directory is not presen
2550 via exclusion or depth filtering, skip it instead of recording
2551 a tree conflict.
2552
2553 Non-inheritable mergeinfo will be recorded, allowing
2554 future merges into non-shallow working copies to merge
2555 changes we missed this time around. */
2556 if (pdb && (excluded
2557 || (parent_depth != svn_depth_unknown &&
2558 parent_depth < svn_depth_immediates)))
2559 {
2560 db->shadowed = TRUE;
2561
2562 db->tree_conflict_reason = CONFLICT_REASON_SKIP;
2563 db->skip_reason = svn_wc_notify_state_missing;
2564
2565 return SVN_NO_ERROR;
2566 }
2567
2568 if (is_deleted)
2569 db->tree_conflict_reason = svn_wc_conflict_reason_deleted;
2570 else
2571 db->tree_conflict_reason = svn_wc_conflict_reason_missing;
2572
2573 /* ### To avoid breaking tests */
2574 *skip = TRUE;
2575 *skip_children = TRUE;
2576 SVN_ERR(mark_dir_edited(merge_b, db, local_abspath, scratch_pool));
2577 return SVN_NO_ERROR;
2578 /* ### /avoid breaking tests */
2579 }
2580 else if (kind != svn_node_dir)
2581 {
2582 db->shadowed = TRUE;
2583
2584 db->tree_conflict_reason = svn_wc_conflict_reason_obstructed;
2585
2586 /* ### To avoid breaking tests */
2587 *skip = TRUE;
2588 *skip_children = TRUE;
2589 SVN_ERR(mark_dir_edited(merge_b, db, local_abspath, scratch_pool));
2590 return SVN_NO_ERROR;
2591 /* ### /avoid breaking tests */
2592 }
2593
2594 if (! right_source)
2595 {
2596 /* We want to delete the directory */
2597 /* Mark PB edited now? */
2598 db->tree_conflict_action = svn_wc_conflict_action_delete;
2599 SVN_ERR(mark_dir_edited(merge_b, db, local_abspath, scratch_pool));
2600
2601 if (db->shadowed)
2602 {
2603 *skip_children = TRUE;
2604 return SVN_NO_ERROR; /* Already set a tree conflict */
2605 }
2606
2607 db->delete_state = (pdb != NULL) ? pdb->delete_state : NULL;
2608
2609 if (db->delete_state && db->delete_state->found_edit)
2610 {
2611 /* A sibling found a conflict. Done. */
2612 *skip = TRUE;
2613 *skip_children = TRUE;
2614 }
2615 else if (merge_b->force_delete)
2616 {
2617 /* No comparison necessary */
2618 *skip_children = TRUE;
2619 }
2620 else if (! db->delete_state)
2621 {
2622 /* Start descendant comparison */
2623 db->delete_state = apr_pcalloc(db->pool,
2624 sizeof(*db->delete_state));
2625
2626 db->delete_state->del_root = db;
2627 db->delete_state->compared_abspaths = apr_hash_make(db->pool);
2628 }
2629 }
2630 }
2631 else
2632 {
2633 const svn_wc_conflict_description2_t *old_tc = NULL;
2634
2635 /* The node doesn't exist pre-merge: We have an addition */
2636 db->added = TRUE;
2637 db->tree_conflict_action = svn_wc_conflict_action_add;
2638
2639 if (pdb && pdb->pending_deletes
2640 && svn_hash_gets(pdb->pending_deletes, local_abspath))
2641 {
2642 db->add_is_replace = TRUE;
2643 db->tree_conflict_action = svn_wc_conflict_action_replace;
2644
2645 svn_hash_sets(pdb->pending_deletes, local_abspath, NULL);
2646 }
2647
2648 if (pdb
2649 && pdb->new_tree_conflicts
2650 && (old_tc = svn_hash_gets(pdb->new_tree_conflicts, local_abspath)))
2651 {
2652 db->tree_conflict_action = svn_wc_conflict_action_replace;
2653 db->tree_conflict_reason = old_tc->reason;
2654
2655 if (old_tc->reason == svn_wc_conflict_reason_deleted
2656 || old_tc->reason == svn_wc_conflict_reason_moved_away)
2657 {
2658 /* Issue #3806: Incoming replacements on local deletes produce
2659 inconsistent result.
2660
2661 In this specific case we can continue applying the add part
2662 of the replacement. */
2663 }
2664 else
2665 {
2666 *skip = TRUE;
2667 *skip_children = TRUE;
2668
2669 /* Update the tree conflict to store that this is a replace */
2670 SVN_ERR(record_tree_conflict(merge_b, local_abspath, pdb,
2671 svn_node_dir,
2672 db->tree_conflict_action,
2673 db->tree_conflict_reason,
2674 old_tc, FALSE,
2675 scratch_pool));
2676
2677 return SVN_NO_ERROR;
2678 }
2679 }
2680
2681 if (! (merge_b->dry_run
2682 && ((pdb && pdb->added) || db->add_is_replace)))
2683 {
2684 svn_wc_notify_state_t obstr_state;
2685 svn_node_kind_t kind;
2686 svn_boolean_t is_deleted;
2687
2688 SVN_ERR(perform_obstruction_check(&obstr_state, &is_deleted, NULL,
2689 &kind, NULL,
2690 merge_b, local_abspath,
2691 scratch_pool));
2692
2693 /* In this case of adding a directory, we have an exception to the
2694 * usual "skip if it's inconsistent" rule. If the directory exists
2695 * on disk unexpectedly, we simply make it versioned, because we can
2696 * do so without risk of destroying data. Only skip if it is
2697 * versioned but unexpectedly missing from disk, or is unversioned
2698 * but obstructed by a node of the wrong kind. */
2699 if (obstr_state == svn_wc_notify_state_obstructed
2700 && (is_deleted || kind == svn_node_none))
2701 {
2702 svn_node_kind_t disk_kind;
2703
2704 SVN_ERR(svn_io_check_path(local_abspath, &disk_kind,
2705 scratch_pool));
2706
2707 if (disk_kind == svn_node_dir)
2708 {
2709 obstr_state = svn_wc_notify_state_inapplicable;
2710 db->add_existing = TRUE; /* Take over existing directory */
2711 }
2712 }
2713
2714 if (obstr_state != svn_wc_notify_state_inapplicable)
2715 {
2716 /* Skip the obstruction */
2717 db->shadowed = TRUE;
2718 db->tree_conflict_reason = CONFLICT_REASON_SKIP;
2719 db->skip_reason = obstr_state;
2720 }
2721 else if (kind != svn_node_none && !is_deleted)
2722 {
2723 /* Set a tree conflict */
2724 db->shadowed = TRUE;
2725 db->tree_conflict_reason = svn_wc_conflict_reason_obstructed;
2726 }
2727 }
2728
2729 /* Handle pending conflicts */
2730 SVN_ERR(mark_dir_edited(merge_b, db, local_abspath, scratch_pool));
2731
2732 if (db->shadowed)
2733 {
2734 /* Notified and done. Skip children? */
2735 }
2736 else if (merge_b->record_only)
2737 {
2738 /* Ok, we are done for this node and its descendants */
2739 *skip = TRUE;
2740 *skip_children = TRUE;
2741 }
2742 else if (! merge_b->dry_run)
2743 {
2744 /* Create the directory on disk, to allow descendants to be added */
2745 if (! db->add_existing)
2746 SVN_ERR(svn_io_dir_make(local_abspath, APR_OS_DEFAULT,
2747 scratch_pool));
2748
2749 if (old_tc)
2750 {
2751 /* svn_wc_add4 and svn_wc_add_from_disk2 can't add a node
2752 over an existing tree conflict */
2753
2754 /* ### These functions should take some tree conflict argument
2755 and allow overwriting the tc when one is passed */
2756
2757 SVN_ERR(svn_wc__del_tree_conflict(merge_b->ctx->wc_ctx,
2758 local_abspath,
2759 scratch_pool));
2760 }
2761
2762 if (merge_b->same_repos)
2763 {
2764 const char *original_url;
2765
2766 original_url = svn_path_url_add_component2(
2767 merge_b->merge_source.loc2->url,
2768 relpath, scratch_pool);
2769
2770 /* Limitation (aka HACK):
2771 We create a newly added directory with an original URL and
2772 revision as that in the repository, but without its properties
2773 and children.
2774
2775 When the merge is cancelled before the final dir_added(), the
2776 copy won't really represent the in-repository state of the node.
2777 */
2778 SVN_ERR(svn_wc_add4(merge_b->ctx->wc_ctx, local_abspath,
2779 svn_depth_infinity,
2780 original_url,
2781 right_source->revision,
2782 merge_b->ctx->cancel_func,
2783 merge_b->ctx->cancel_baton,
2784 NULL, NULL /* no notify! */,
2785 scratch_pool));
2786 }
2787 else
2788 {
2789 SVN_ERR(svn_wc_add_from_disk2(merge_b->ctx->wc_ctx, local_abspath,
2790 apr_hash_make(scratch_pool),
2791 NULL, NULL /* no notify! */,
2792 scratch_pool));
2793 }
2794
2795 if (old_tc != NULL)
2796 {
2797 /* ### Should be atomic with svn_wc_add(4|_from_disk2)() */
2798 SVN_ERR(record_tree_conflict(merge_b, local_abspath, pdb,
2799 svn_node_dir,
2800 db->tree_conflict_action,
2801 db->tree_conflict_reason,
2802 old_tc, FALSE,
2803 scratch_pool));
2804 }
2805 }
2806
2807 if (! db->shadowed && !merge_b->record_only)
2808 SVN_ERR(record_update_add(merge_b, local_abspath, svn_node_dir,
2809 db->add_is_replace, scratch_pool));
2810 }
2811 return SVN_NO_ERROR;
2812 }
2813
2814 /* An svn_diff_tree_processor_t function.
2815 *
2816 * Called after merge_dir_opened() when a node exists in both the left and
2817 * right source, but has its properties changed inbetween.
2818 *
2819 * After the merge_dir_opened() but before the call to this merge_dir_changed()
2820 * function all descendants will have been updated.
2821 */
2822 static svn_error_t *
merge_dir_changed(const char * relpath,const svn_diff_source_t * left_source,const svn_diff_source_t * right_source,apr_hash_t * left_props,apr_hash_t * right_props,const apr_array_header_t * prop_changes,void * dir_baton,const struct svn_diff_tree_processor_t * processor,apr_pool_t * scratch_pool)2823 merge_dir_changed(const char *relpath,
2824 const svn_diff_source_t *left_source,
2825 const svn_diff_source_t *right_source,
2826 /*const*/ apr_hash_t *left_props,
2827 /*const*/ apr_hash_t *right_props,
2828 const apr_array_header_t *prop_changes,
2829 void *dir_baton,
2830 const struct svn_diff_tree_processor_t *processor,
2831 apr_pool_t *scratch_pool)
2832 {
2833 merge_cmd_baton_t *merge_b = processor->baton;
2834 struct merge_dir_baton_t *db = dir_baton;
2835 const apr_array_header_t *props;
2836 const char *local_abspath = svn_dirent_join(merge_b->target->abspath,
2837 relpath, scratch_pool);
2838
2839 SVN_ERR(handle_pending_notifications(merge_b, db, scratch_pool));
2840
2841 SVN_ERR(mark_dir_edited(merge_b, db, local_abspath, scratch_pool));
2842
2843 if (db->shadowed)
2844 {
2845 if (db->tree_conflict_reason == CONFLICT_REASON_NONE)
2846 {
2847 /* We haven't notified for this node yet: report a skip */
2848 SVN_ERR(record_skip(merge_b, local_abspath, svn_node_dir,
2849 svn_wc_notify_update_shadowed_update,
2850 db->skip_reason, scratch_pool));
2851 }
2852
2853 return SVN_NO_ERROR;
2854 }
2855
2856 SVN_ERR(prepare_merge_props_changed(&props, local_abspath, prop_changes,
2857 merge_b, scratch_pool, scratch_pool));
2858
2859 if (props->nelts)
2860 {
2861 const svn_wc_conflict_version_t *left;
2862 const svn_wc_conflict_version_t *right;
2863 svn_client_ctx_t *ctx = merge_b->ctx;
2864 svn_wc_notify_state_t prop_state;
2865
2866 SVN_ERR(make_conflict_versions(&left, &right, local_abspath,
2867 svn_node_dir, &merge_b->merge_source,
2868 merge_b->target,
2869 scratch_pool, scratch_pool));
2870
2871 SVN_ERR(svn_wc_merge_props3(&prop_state, ctx->wc_ctx, local_abspath,
2872 left, right,
2873 left_props, props,
2874 merge_b->dry_run,
2875 NULL, NULL,
2876 ctx->cancel_func, ctx->cancel_baton,
2877 scratch_pool));
2878
2879 if (prop_state == svn_wc_notify_state_conflicted)
2880 {
2881 alloc_and_store_path(&merge_b->conflicted_paths, local_abspath,
2882 merge_b->pool);
2883 }
2884
2885 if (prop_state == svn_wc_notify_state_conflicted
2886 || prop_state == svn_wc_notify_state_merged
2887 || prop_state == svn_wc_notify_state_changed)
2888 {
2889 SVN_ERR(record_update_update(merge_b, local_abspath, svn_node_file,
2890 svn_wc_notify_state_inapplicable,
2891 prop_state, scratch_pool));
2892 }
2893 }
2894
2895 return SVN_NO_ERROR;
2896 }
2897
2898
2899 /* An svn_diff_tree_processor_t function.
2900 *
2901 * Called after merge_dir_opened() when a node doesn't exist in LEFT_SOURCE,
2902 * but does in RIGHT_SOURCE. After the merge_dir_opened() but before the call
2903 * to this merge_dir_added() function all descendants will have been added.
2904 *
2905 * When a node is replaced instead of just added a separate opened+deleted will
2906 * be invoked before the current open+added.
2907 */
2908 static svn_error_t *
merge_dir_added(const char * relpath,const svn_diff_source_t * copyfrom_source,const svn_diff_source_t * right_source,apr_hash_t * copyfrom_props,apr_hash_t * right_props,void * dir_baton,const struct svn_diff_tree_processor_t * processor,apr_pool_t * scratch_pool)2909 merge_dir_added(const char *relpath,
2910 const svn_diff_source_t *copyfrom_source,
2911 const svn_diff_source_t *right_source,
2912 /*const*/ apr_hash_t *copyfrom_props,
2913 /*const*/ apr_hash_t *right_props,
2914 void *dir_baton,
2915 const struct svn_diff_tree_processor_t *processor,
2916 apr_pool_t *scratch_pool)
2917 {
2918 merge_cmd_baton_t *merge_b = processor->baton;
2919 struct merge_dir_baton_t *db = dir_baton;
2920 const char *local_abspath = svn_dirent_join(merge_b->target->abspath,
2921 relpath, scratch_pool);
2922
2923 /* For consistency; usually a no-op from _dir_added() */
2924 SVN_ERR(handle_pending_notifications(merge_b, db, scratch_pool));
2925 SVN_ERR(mark_dir_edited(merge_b, db, local_abspath, scratch_pool));
2926
2927 if (db->shadowed)
2928 {
2929 if (db->tree_conflict_reason == CONFLICT_REASON_NONE)
2930 {
2931 /* We haven't notified for this node yet: report a skip */
2932 SVN_ERR(record_skip(merge_b, local_abspath, svn_node_dir,
2933 svn_wc_notify_update_shadowed_add,
2934 db->skip_reason, scratch_pool));
2935 }
2936
2937 return SVN_NO_ERROR;
2938 }
2939
2940 SVN_ERR_ASSERT(
2941 db->edited /* Marked edited from merge_open_dir() */
2942 && ! merge_b->record_only /* Skip details from merge_open_dir() */
2943 );
2944
2945 if ((merge_b->merge_source.ancestral || merge_b->reintegrate_merge)
2946 && ( !db->parent_baton || !db->parent_baton->added))
2947 {
2948 /* Store the roots of added subtrees */
2949 store_path(merge_b->added_abspaths, local_abspath);
2950 }
2951
2952 if (merge_b->same_repos)
2953 {
2954 /* When the directory was added in merge_dir_added() we didn't update its
2955 pristine properties. Instead we receive the property changes later and
2956 apply them in this function.
2957
2958 If we would apply them as changes (such as before fixing issue #3405),
2959 we would see the unmodified properties as local changes, and the
2960 pristine properties would be out of sync with what the repository
2961 expects for this directory.
2962
2963 Instead of doing that we now simply set the properties as the pristine
2964 properties via a private libsvn_wc api.
2965 */
2966
2967 const char *copyfrom_url;
2968 svn_revnum_t copyfrom_rev;
2969 const char *parent_abspath;
2970 const char *child;
2971
2972 /* Creating a hash containing regular and entry props */
2973 apr_hash_t *new_pristine_props = right_props;
2974
2975 parent_abspath = svn_dirent_dirname(local_abspath, scratch_pool);
2976 child = svn_dirent_is_child(merge_b->target->abspath, local_abspath, NULL);
2977 SVN_ERR_ASSERT(child != NULL);
2978
2979 copyfrom_url = svn_path_url_add_component2(merge_b->merge_source.loc2->url,
2980 child, scratch_pool);
2981 copyfrom_rev = right_source->revision;
2982
2983 SVN_ERR(check_repos_match(merge_b->target, parent_abspath, copyfrom_url,
2984 scratch_pool));
2985
2986 if (!merge_b->dry_run)
2987 {
2988 SVN_ERR(svn_wc__complete_directory_add(merge_b->ctx->wc_ctx,
2989 local_abspath,
2990 new_pristine_props,
2991 copyfrom_url, copyfrom_rev,
2992 scratch_pool));
2993 }
2994
2995 if (svn_hash_gets(new_pristine_props, SVN_PROP_MERGEINFO))
2996 {
2997 alloc_and_store_path(&merge_b->paths_with_new_mergeinfo,
2998 local_abspath, merge_b->pool);
2999 }
3000 }
3001 else
3002 {
3003 apr_array_header_t *regular_props;
3004 apr_hash_t *new_props;
3005 svn_wc_notify_state_t prop_state;
3006
3007 SVN_ERR(svn_categorize_props(svn_prop_hash_to_array(right_props,
3008 scratch_pool),
3009 NULL, NULL, ®ular_props, scratch_pool));
3010
3011 new_props = svn_prop_array_to_hash(regular_props, scratch_pool);
3012
3013 svn_hash_sets(new_props, SVN_PROP_MERGEINFO, NULL);
3014
3015 /* ### What is the easiest way to set new_props on LOCAL_ABSPATH?
3016
3017 ### This doesn't need a merge as we just added the node
3018 ### (or installed a tree conflict and skipped this node)*/
3019
3020 SVN_ERR(svn_wc_merge_props3(&prop_state, merge_b->ctx->wc_ctx,
3021 local_abspath,
3022 NULL, NULL,
3023 apr_hash_make(scratch_pool),
3024 svn_prop_hash_to_array(new_props,
3025 scratch_pool),
3026 merge_b->dry_run,
3027 NULL, NULL,
3028 merge_b->ctx->cancel_func,
3029 merge_b->ctx->cancel_baton,
3030 scratch_pool));
3031 if (prop_state == svn_wc_notify_state_conflicted)
3032 {
3033 alloc_and_store_path(&merge_b->conflicted_paths, local_abspath,
3034 merge_b->pool);
3035 }
3036 }
3037
3038 return SVN_NO_ERROR;
3039 }
3040
3041 /* Helper for merge_dir_deleted. Implement svn_wc_status_func4_t */
3042 static svn_error_t *
verify_touched_by_del_check(void * baton,const char * local_abspath,const svn_wc_status3_t * status,apr_pool_t * scratch_pool)3043 verify_touched_by_del_check(void *baton,
3044 const char *local_abspath,
3045 const svn_wc_status3_t *status,
3046 apr_pool_t *scratch_pool)
3047 {
3048 struct dir_delete_baton_t *delb = baton;
3049
3050 if (svn_hash_gets(delb->compared_abspaths, local_abspath))
3051 return SVN_NO_ERROR;
3052
3053 switch (status->node_status)
3054 {
3055 case svn_wc_status_deleted:
3056 case svn_wc_status_ignored:
3057 case svn_wc_status_none:
3058 return SVN_NO_ERROR;
3059
3060 default:
3061 delb->found_edit = TRUE;
3062 return svn_error_create(SVN_ERR_CEASE_INVOCATION, NULL, NULL);
3063 }
3064 }
3065
3066 /* An svn_diff_tree_processor_t function.
3067 *
3068 * Called after merge_dir_opened() when a node existed only in the left source.
3069 *
3070 * After the merge_dir_opened() but before the call to this merge_dir_deleted()
3071 * function all descendants that existed in left_source will have been deleted.
3072 *
3073 * If this node is replaced, an _opened() followed by a matching _add() will
3074 * be invoked after this function.
3075 */
3076 static svn_error_t *
merge_dir_deleted(const char * relpath,const svn_diff_source_t * left_source,apr_hash_t * left_props,void * dir_baton,const struct svn_diff_tree_processor_t * processor,apr_pool_t * scratch_pool)3077 merge_dir_deleted(const char *relpath,
3078 const svn_diff_source_t *left_source,
3079 /*const*/ apr_hash_t *left_props,
3080 void *dir_baton,
3081 const struct svn_diff_tree_processor_t *processor,
3082 apr_pool_t *scratch_pool)
3083 {
3084 merge_cmd_baton_t *merge_b = processor->baton;
3085 struct merge_dir_baton_t *db = dir_baton;
3086 const char *local_abspath = svn_dirent_join(merge_b->target->abspath,
3087 relpath, scratch_pool);
3088 svn_boolean_t same;
3089 apr_hash_t *working_props;
3090
3091 SVN_ERR(handle_pending_notifications(merge_b, db, scratch_pool));
3092 SVN_ERR(mark_dir_edited(merge_b, db, local_abspath, scratch_pool));
3093
3094 if (db->shadowed)
3095 {
3096 if (db->tree_conflict_reason == CONFLICT_REASON_NONE)
3097 {
3098 /* We haven't notified for this node yet: report a skip */
3099 SVN_ERR(record_skip(merge_b, local_abspath, svn_node_dir,
3100 svn_wc_notify_update_shadowed_delete,
3101 db->skip_reason, scratch_pool));
3102 }
3103
3104 return SVN_NO_ERROR;
3105 }
3106
3107 /* Easy out: We are only applying mergeinfo differences. */
3108 if (merge_b->record_only)
3109 {
3110 return SVN_NO_ERROR;
3111 }
3112
3113 SVN_ERR(svn_wc_prop_list2(&working_props,
3114 merge_b->ctx->wc_ctx, local_abspath,
3115 scratch_pool, scratch_pool));
3116
3117 if (merge_b->force_delete)
3118 {
3119 /* In this legacy mode we just assume that a directory delete
3120 matches any directory. db->delete_state is NULL */
3121 same = TRUE;
3122 }
3123 else
3124 {
3125 struct dir_delete_baton_t *delb;
3126
3127 /* Compare the properties */
3128 SVN_ERR(properties_same_p(&same, left_props, working_props,
3129 scratch_pool));
3130 delb = db->delete_state;
3131 assert(delb != NULL);
3132
3133 if (! same)
3134 {
3135 delb->found_edit = TRUE;
3136 }
3137 else
3138 {
3139 store_path(delb->compared_abspaths, local_abspath);
3140 }
3141
3142 if (delb->del_root != db)
3143 return SVN_NO_ERROR;
3144
3145 if (delb->found_edit)
3146 same = FALSE;
3147 else
3148 {
3149 apr_array_header_t *ignores;
3150 svn_error_t *err;
3151 same = TRUE;
3152
3153 SVN_ERR(svn_wc_get_default_ignores(&ignores, merge_b->ctx->config,
3154 scratch_pool));
3155
3156 /* None of the descendants was modified, but maybe there are
3157 descendants we haven't walked?
3158
3159 Note that we aren't interested in changes, as we already verified
3160 changes in the paths touched by the merge. And the existence of
3161 other paths is enough to mark the directory edited */
3162 err = svn_wc_walk_status(merge_b->ctx->wc_ctx, local_abspath,
3163 svn_depth_infinity, TRUE /* get-all */,
3164 FALSE /* no-ignore */,
3165 TRUE /* ignore-text-mods */, ignores,
3166 verify_touched_by_del_check, delb,
3167 merge_b->ctx->cancel_func,
3168 merge_b->ctx->cancel_baton,
3169 scratch_pool);
3170
3171 if (err)
3172 {
3173 if (err->apr_err != SVN_ERR_CEASE_INVOCATION)
3174 return svn_error_trace(err);
3175
3176 svn_error_clear(err);
3177 }
3178
3179 same = ! delb->found_edit;
3180 }
3181 }
3182
3183 if (same && !merge_b->dry_run)
3184 {
3185 svn_error_t *err;
3186
3187 err = svn_wc_delete4(merge_b->ctx->wc_ctx, local_abspath,
3188 FALSE /* keep_local */, FALSE /* unversioned */,
3189 merge_b->ctx->cancel_func,
3190 merge_b->ctx->cancel_baton,
3191 NULL, NULL /* no notify */,
3192 scratch_pool);
3193
3194 if (err)
3195 {
3196 if (err->apr_err != SVN_ERR_WC_LEFT_LOCAL_MOD)
3197 return svn_error_trace(err);
3198
3199 svn_error_clear(err);
3200 same = FALSE;
3201 }
3202 }
3203
3204 if (! same)
3205 {
3206 /* If the attempt to delete an existing directory failed,
3207 * the directory has local modifications (e.g. locally added
3208 * files, or property changes). Flag a tree conflict. */
3209
3210 /* This handles use case 5 described in the paper attached to issue
3211 * #2282. See also notes/tree-conflicts/detection.txt
3212 */
3213 SVN_ERR(record_tree_conflict(merge_b, local_abspath, db->parent_baton,
3214 svn_node_dir,
3215 svn_wc_conflict_action_delete,
3216 svn_wc_conflict_reason_edited,
3217 NULL, TRUE,
3218 scratch_pool));
3219 }
3220 else
3221 {
3222 /* Record that we might have deleted mergeinfo */
3223 if (working_props
3224 && svn_hash_gets(working_props, SVN_PROP_MERGEINFO))
3225 {
3226 alloc_and_store_path(&merge_b->paths_with_deleted_mergeinfo,
3227 local_abspath, merge_b->pool);
3228 }
3229
3230 SVN_ERR(record_update_delete(merge_b, db->parent_baton, local_abspath,
3231 svn_node_dir, scratch_pool));
3232 }
3233
3234 return SVN_NO_ERROR;
3235 }
3236
3237 /* An svn_diff_tree_processor_t function.
3238 *
3239 * Called after merge_dir_opened() when a node itself didn't change between
3240 * the left and right source.
3241 *
3242 * After the merge_dir_opened() but before the call to this merge_dir_closed()
3243 * function all descendants will have been processed.
3244 */
3245 static svn_error_t *
merge_dir_closed(const char * relpath,const svn_diff_source_t * left_source,const svn_diff_source_t * right_source,void * dir_baton,const struct svn_diff_tree_processor_t * processor,apr_pool_t * scratch_pool)3246 merge_dir_closed(const char *relpath,
3247 const svn_diff_source_t *left_source,
3248 const svn_diff_source_t *right_source,
3249 void *dir_baton,
3250 const struct svn_diff_tree_processor_t *processor,
3251 apr_pool_t *scratch_pool)
3252 {
3253 merge_cmd_baton_t *merge_b = processor->baton;
3254 struct merge_dir_baton_t *db = dir_baton;
3255
3256 SVN_ERR(handle_pending_notifications(merge_b, db, scratch_pool));
3257
3258 return SVN_NO_ERROR;
3259 }
3260
3261 /* An svn_diff_tree_processor_t function.
3262
3263 Called when the diff driver wants to report an absent path.
3264
3265 In case of merges this happens when the diff encounters a server-excluded
3266 path.
3267
3268 We register a skipped path, which will make parent mergeinfo non-
3269 inheritable. This ensures that a future merge might see these skipped
3270 changes as eligable for merging.
3271
3272 For legacy reasons we also notify the path as skipped.
3273 */
3274 static svn_error_t *
merge_node_absent(const char * relpath,void * dir_baton,const svn_diff_tree_processor_t * processor,apr_pool_t * scratch_pool)3275 merge_node_absent(const char *relpath,
3276 void *dir_baton,
3277 const svn_diff_tree_processor_t *processor,
3278 apr_pool_t *scratch_pool)
3279 {
3280 merge_cmd_baton_t *merge_b = processor->baton;
3281
3282 const char *local_abspath = svn_dirent_join(merge_b->target->abspath,
3283 relpath, scratch_pool);
3284
3285 SVN_ERR(record_skip(merge_b, local_abspath, svn_node_unknown,
3286 svn_wc_notify_skip, svn_wc_notify_state_missing,
3287 scratch_pool));
3288
3289 return SVN_NO_ERROR;
3290 }
3291
3292 /*-----------------------------------------------------------------------*/
3293
3294 /*** Merge Notification ***/
3295
3296
3297 /* Finds a nearest ancestor in CHILDREN_WITH_MERGEINFO for LOCAL_ABSPATH. If
3298 PATH_IS_OWN_ANCESTOR is TRUE then a child in CHILDREN_WITH_MERGEINFO
3299 where child->abspath == PATH is considered PATH's ancestor. If FALSE,
3300 then child->abspath must be a proper ancestor of PATH.
3301
3302 CHILDREN_WITH_MERGEINFO is expected to be sorted in Depth first
3303 order of path. */
3304 static svn_client__merge_path_t *
find_nearest_ancestor(const apr_array_header_t * children_with_mergeinfo,svn_boolean_t path_is_own_ancestor,const char * local_abspath)3305 find_nearest_ancestor(const apr_array_header_t *children_with_mergeinfo,
3306 svn_boolean_t path_is_own_ancestor,
3307 const char *local_abspath)
3308 {
3309 int i;
3310
3311 SVN_ERR_ASSERT_NO_RETURN(children_with_mergeinfo != NULL);
3312
3313 for (i = children_with_mergeinfo->nelts - 1; i >= 0 ; i--)
3314 {
3315 svn_client__merge_path_t *child =
3316 APR_ARRAY_IDX(children_with_mergeinfo, i, svn_client__merge_path_t *);
3317
3318 if (svn_dirent_is_ancestor(child->abspath, local_abspath)
3319 && (path_is_own_ancestor
3320 || strcmp(child->abspath, local_abspath) != 0))
3321 return child;
3322 }
3323 return NULL;
3324 }
3325
3326 /* Find the highest level path in a merge target (possibly the merge target
3327 itself) to use in a merge notification header.
3328
3329 Return the svn_client__merge_path_t * representing the most distant
3330 ancestor in CHILDREN_WITH_MERGEINFO of LOCAL_ABSPATH where said
3331 ancestor's first remaining ranges element (per the REMAINING_RANGES
3332 member of the ancestor) intersect with the first remaining ranges element
3333 for every intermediate ancestor svn_client__merge_path_t * of
3334 LOCAL_ABSPATH. If no such ancestor is found return NULL.
3335
3336 If the remaining ranges of the elements in CHILDREN_WITH_MERGEINFO
3337 represent a forward merge, then set *START to the oldest revision found
3338 in any of the intersecting ancestors and *END to the youngest revision
3339 found. If the remaining ranges of the elements in CHILDREN_WITH_MERGEINFO
3340 represent a reverse merge, then set *START to the youngest revision
3341 found and *END to the oldest revision found. If no ancestors are found
3342 then set *START and *END to SVN_INVALID_REVNUM.
3343
3344 If PATH_IS_OWN_ANCESTOR is TRUE then a child in CHILDREN_WITH_MERGEINFO
3345 where child->abspath == PATH is considered PATH's ancestor. If FALSE,
3346 then child->abspath must be a proper ancestor of PATH.
3347
3348 See the CHILDREN_WITH_MERGEINFO ARRAY global comment for more
3349 information. */
3350 static svn_client__merge_path_t *
find_nearest_ancestor_with_intersecting_ranges(svn_revnum_t * start,svn_revnum_t * end,const apr_array_header_t * children_with_mergeinfo,svn_boolean_t path_is_own_ancestor,const char * local_abspath)3351 find_nearest_ancestor_with_intersecting_ranges(
3352 svn_revnum_t *start,
3353 svn_revnum_t *end,
3354 const apr_array_header_t *children_with_mergeinfo,
3355 svn_boolean_t path_is_own_ancestor,
3356 const char *local_abspath)
3357 {
3358 int i;
3359 svn_client__merge_path_t *nearest_ancestor = NULL;
3360
3361 *start = SVN_INVALID_REVNUM;
3362 *end = SVN_INVALID_REVNUM;
3363
3364 SVN_ERR_ASSERT_NO_RETURN(children_with_mergeinfo != NULL);
3365
3366 for (i = children_with_mergeinfo->nelts - 1; i >= 0 ; i--)
3367 {
3368 svn_client__merge_path_t *child =
3369 APR_ARRAY_IDX(children_with_mergeinfo, i, svn_client__merge_path_t *);
3370
3371 if (svn_dirent_is_ancestor(child->abspath, local_abspath)
3372 && (path_is_own_ancestor
3373 || strcmp(child->abspath, local_abspath) != 0))
3374 {
3375 if (nearest_ancestor == NULL)
3376 {
3377 /* Found an ancestor. */
3378 nearest_ancestor = child;
3379
3380 if (child->remaining_ranges)
3381 {
3382 svn_merge_range_t *r1 = APR_ARRAY_IDX(
3383 child->remaining_ranges, 0, svn_merge_range_t *);
3384 *start = r1->start;
3385 *end = r1->end;
3386 }
3387 else
3388 {
3389 /* If CHILD->REMAINING_RANGES is null then LOCAL_ABSPATH
3390 is inside an absent subtree in the merge target. */
3391 *start = SVN_INVALID_REVNUM;
3392 *end = SVN_INVALID_REVNUM;
3393 break;
3394 }
3395 }
3396 else
3397 {
3398 /* We'e found another ancestor for LOCAL_ABSPATH. Do its
3399 first remaining range intersect with the previously
3400 found ancestor? */
3401 svn_merge_range_t *r1 =
3402 APR_ARRAY_IDX(nearest_ancestor->remaining_ranges, 0,
3403 svn_merge_range_t *);
3404 svn_merge_range_t *r2 =
3405 APR_ARRAY_IDX(child->remaining_ranges, 0,
3406 svn_merge_range_t *);
3407
3408 if (r1 && r2)
3409 {
3410 svn_merge_range_t range1;
3411 svn_merge_range_t range2;
3412 svn_boolean_t reverse_merge = r1->start > r2->end;
3413
3414 /* Flip endpoints if this is a reverse merge. */
3415 if (reverse_merge)
3416 {
3417 range1.start = r1->end;
3418 range1.end = r1->start;
3419 range2.start = r2->end;
3420 range2.end = r2->start;
3421 }
3422 else
3423 {
3424 range1.start = r1->start;
3425 range1.end = r1->end;
3426 range2.start = r2->start;
3427 range2.end = r2->end;
3428 }
3429
3430 if (range1.start < range2.end && range2.start < range1.end)
3431 {
3432 *start = reverse_merge ?
3433 MAX(r1->start, r2->start) : MIN(r1->start, r2->start);
3434 *end = reverse_merge ?
3435 MIN(r1->end, r2->end) : MAX(r1->end, r2->end);
3436 nearest_ancestor = child;
3437 }
3438 }
3439 }
3440 }
3441 }
3442 return nearest_ancestor;
3443 }
3444
3445 /* Notify that we're starting to record mergeinfo for the merge of the
3446 * revision range RANGE into TARGET_ABSPATH. RANGE should be null if the
3447 * merge sources are not from the same URL.
3448 *
3449 * This calls the client's notification receiver (as found in the client
3450 * context), with a WC abspath.
3451 */
3452 static void
notify_mergeinfo_recording(const char * target_abspath,const svn_merge_range_t * range,svn_client_ctx_t * ctx,apr_pool_t * pool)3453 notify_mergeinfo_recording(const char *target_abspath,
3454 const svn_merge_range_t *range,
3455 svn_client_ctx_t *ctx,
3456 apr_pool_t *pool)
3457 {
3458 if (ctx->notify_func2)
3459 {
3460 svn_wc_notify_t *n = svn_wc_create_notify(
3461 target_abspath, svn_wc_notify_merge_record_info_begin, pool);
3462
3463 n->merge_range = range ? svn_merge_range_dup(range, pool) : NULL;
3464 ctx->notify_func2(ctx->notify_baton2, n, pool);
3465 }
3466 }
3467
3468 /* Notify that we're completing the merge into TARGET_ABSPATH.
3469 *
3470 * This calls the client's notification receiver (as found in the client
3471 * context), with a WC abspath.
3472 */
3473 static void
notify_merge_completed(const char * target_abspath,svn_client_ctx_t * ctx,apr_pool_t * pool)3474 notify_merge_completed(const char *target_abspath,
3475 svn_client_ctx_t *ctx,
3476 apr_pool_t *pool)
3477 {
3478 if (ctx->notify_func2)
3479 {
3480 svn_wc_notify_t *n
3481 = svn_wc_create_notify(target_abspath, svn_wc_notify_merge_completed,
3482 pool);
3483 ctx->notify_func2(ctx->notify_baton2, n, pool);
3484 }
3485 }
3486
3487 /* Is the notification the result of a real operative merge? */
3488 #define IS_OPERATIVE_NOTIFICATION(notify) \
3489 (notify->content_state == svn_wc_notify_state_conflicted \
3490 || notify->content_state == svn_wc_notify_state_merged \
3491 || notify->content_state == svn_wc_notify_state_changed \
3492 || notify->prop_state == svn_wc_notify_state_conflicted \
3493 || notify->prop_state == svn_wc_notify_state_merged \
3494 || notify->prop_state == svn_wc_notify_state_changed \
3495 || notify->action == svn_wc_notify_update_add \
3496 || notify->action == svn_wc_notify_tree_conflict)
3497
3498
3499 /* Remove merge source gaps from range used for merge notifications.
3500 See http://subversion.tigris.org/issues/show_bug.cgi?id=4138
3501
3502 If IMPLICIT_SRC_GAP is not NULL then it is a rangelist containing a
3503 single range (see the implicit_src_gap member of merge_cmd_baton_t).
3504 RANGE describes a (possibly reverse) merge.
3505
3506 If IMPLICIT_SRC_GAP is not NULL and it's sole range intersects with
3507 the older revision in *RANGE, then remove IMPLICIT_SRC_GAP's range
3508 from *RANGE. */
3509 static void
remove_source_gap(svn_merge_range_t * range,apr_array_header_t * implicit_src_gap)3510 remove_source_gap(svn_merge_range_t *range,
3511 apr_array_header_t *implicit_src_gap)
3512 {
3513 if (implicit_src_gap)
3514 {
3515 svn_merge_range_t *gap_range =
3516 APR_ARRAY_IDX(implicit_src_gap, 0, svn_merge_range_t *);
3517 if (range->start < range->end)
3518 {
3519 if (gap_range->start == range->start)
3520 range->start = gap_range->end;
3521 }
3522 else /* Reverse merge */
3523 {
3524 if (gap_range->start == range->end)
3525 range->end = gap_range->end;
3526 }
3527 }
3528 }
3529
3530 /* Notify that we're starting a merge
3531 *
3532 * This calls the client's notification receiver (as found in the client
3533 * context), with a WC abspath.
3534 */
3535 static svn_error_t *
notify_merge_begin(merge_cmd_baton_t * merge_b,const char * local_abspath,svn_boolean_t delete_action,apr_pool_t * scratch_pool)3536 notify_merge_begin(merge_cmd_baton_t *merge_b,
3537 const char *local_abspath,
3538 svn_boolean_t delete_action,
3539 apr_pool_t *scratch_pool)
3540 {
3541 svn_wc_notify_t *notify;
3542 svn_merge_range_t n_range =
3543 {SVN_INVALID_REVNUM, SVN_INVALID_REVNUM, TRUE};
3544 const char *notify_abspath;
3545
3546 if (! merge_b->ctx->notify_func2)
3547 return SVN_NO_ERROR;
3548
3549 /* If our merge sources are ancestors of one another... */
3550 if (merge_b->merge_source.ancestral)
3551 {
3552 const svn_client__merge_path_t *child;
3553 /* Find NOTIFY->PATH's nearest ancestor in
3554 NOTIFY->CHILDREN_WITH_MERGEINFO. Normally we consider a child in
3555 NOTIFY->CHILDREN_WITH_MERGEINFO representing PATH to be an
3556 ancestor of PATH, but if this is a deletion of PATH then the
3557 notification must be for a proper ancestor of PATH. This ensures
3558 we don't get notifications like:
3559
3560 --- Merging rX into 'PARENT/CHILD'
3561 D PARENT/CHILD
3562
3563 But rather:
3564
3565 --- Merging rX into 'PARENT'
3566 D PARENT/CHILD
3567 */
3568
3569 child = find_nearest_ancestor_with_intersecting_ranges(
3570 &(n_range.start), &(n_range.end),
3571 merge_b->notify_begin.nodes_with_mergeinfo,
3572 ! delete_action, local_abspath);
3573
3574 if (!child && delete_action)
3575 {
3576 /* Triggered by file replace in single-file-merge */
3577 child = find_nearest_ancestor(merge_b->notify_begin.nodes_with_mergeinfo,
3578 TRUE, local_abspath);
3579 }
3580
3581 assert(child != NULL); /* Should always find the merge anchor */
3582
3583 if (! child)
3584 return SVN_NO_ERROR;
3585
3586 if (merge_b->notify_begin.last_abspath != NULL
3587 && strcmp(child->abspath, merge_b->notify_begin.last_abspath) == 0)
3588 {
3589 /* Don't notify the same merge again */
3590 return SVN_NO_ERROR;
3591 }
3592
3593 merge_b->notify_begin.last_abspath = child->abspath;
3594
3595 if (child->absent || child->remaining_ranges->nelts == 0
3596 || !SVN_IS_VALID_REVNUM(n_range.start))
3597 {
3598 /* No valid information for an header */
3599 return SVN_NO_ERROR;
3600 }
3601
3602 notify_abspath = child->abspath;
3603 }
3604 else
3605 {
3606 if (merge_b->notify_begin.last_abspath)
3607 return SVN_NO_ERROR; /* already notified */
3608
3609 notify_abspath = merge_b->target->abspath;
3610 /* Store something in last_abspath. Any value would do */
3611 merge_b->notify_begin.last_abspath = merge_b->target->abspath;
3612 }
3613
3614 notify = svn_wc_create_notify(notify_abspath,
3615 merge_b->same_repos
3616 ? svn_wc_notify_merge_begin
3617 : svn_wc_notify_foreign_merge_begin,
3618 scratch_pool);
3619
3620 if (SVN_IS_VALID_REVNUM(n_range.start))
3621 {
3622 /* If the merge source has a gap, then don't mention
3623 those gap revisions in the notification. */
3624 remove_source_gap(&n_range, merge_b->implicit_src_gap);
3625 notify->merge_range = &n_range;
3626 }
3627 else
3628 {
3629 notify->merge_range = NULL;
3630 }
3631
3632 (*merge_b->ctx->notify_func2)(merge_b->ctx->notify_baton2, notify,
3633 scratch_pool);
3634
3635 return SVN_NO_ERROR;
3636 }
3637
3638 /* Set *OUT_RANGELIST to the intersection of IN_RANGELIST with the simple
3639 * (inheritable) revision range REV1:REV2, according to CONSIDER_INHERITANCE.
3640 * If REV1 is equal to REV2, the result is an empty rangelist, otherwise
3641 * REV1 must be less than REV2.
3642 *
3643 * Note: If CONSIDER_INHERITANCE is FALSE, the effect is to treat any non-
3644 * inheritable input ranges as if they were inheritable. If it is TRUE, the
3645 * effect is to discard any non-inheritable input ranges. Therefore the
3646 * ranges in *OUT_RANGELIST will always be inheritable. */
3647 static svn_error_t *
rangelist_intersect_range(svn_rangelist_t ** out_rangelist,const svn_rangelist_t * in_rangelist,svn_revnum_t rev1,svn_revnum_t rev2,svn_boolean_t consider_inheritance,apr_pool_t * result_pool,apr_pool_t * scratch_pool)3648 rangelist_intersect_range(svn_rangelist_t **out_rangelist,
3649 const svn_rangelist_t *in_rangelist,
3650 svn_revnum_t rev1,
3651 svn_revnum_t rev2,
3652 svn_boolean_t consider_inheritance,
3653 apr_pool_t *result_pool,
3654 apr_pool_t *scratch_pool)
3655 {
3656 SVN_ERR_ASSERT(rev1 <= rev2);
3657
3658 if (rev1 < rev2)
3659 {
3660 svn_rangelist_t *simple_rangelist =
3661 svn_rangelist__initialize(rev1, rev2, TRUE, scratch_pool);
3662
3663 SVN_ERR(svn_rangelist_intersect(out_rangelist,
3664 simple_rangelist, in_rangelist,
3665 consider_inheritance, result_pool));
3666 }
3667 else
3668 {
3669 *out_rangelist = apr_array_make(result_pool, 0,
3670 sizeof(svn_merge_range_t *));
3671 }
3672 return SVN_NO_ERROR;
3673 }
3674
3675 /* Helper for fix_deleted_subtree_ranges(). Like fix_deleted_subtree_ranges()
3676 this function should only be called when honoring mergeinfo.
3677
3678 CHILD, PARENT, REVISION1, REVISION2, and RA_SESSION are all cascaded from
3679 fix_deleted_subtree_ranges() -- see that function for more information on
3680 each.
3681
3682 If PARENT is not the merge target then PARENT must have already have been
3683 processed by this function as a child. Specifically, this means that
3684 PARENT->REMAINING_RANGES must already be populated -- it can be an empty
3685 rangelist but cannot be NULL.
3686
3687 PRIMARY_URL is the merge source url of CHILD at the younger of REVISION1
3688 and REVISION2.
3689
3690 Since this function is only invoked for subtrees of the merge target, the
3691 guarantees afforded by normalize_merge_sources() don't apply - see the
3692 'MERGEINFO MERGE SOURCE NORMALIZATION' comment at the top of this file.
3693 Therefore it is possible that PRIMARY_URL@REVISION1 and
3694 PRIMARY_URL@REVISION2 don't describe the endpoints of an unbroken line of
3695 history. The purpose of this helper is to identify these cases of broken
3696 history and adjust CHILD->REMAINING_RANGES in such a way we don't later try
3697 to describe nonexistent path/revisions to the merge report editor -- see
3698 drive_merge_report_editor().
3699
3700 If PRIMARY_URL@REVISION1 and PRIMARY_URL@REVISION2 describe an unbroken
3701 line of history then do nothing and leave CHILD->REMAINING_RANGES as-is.
3702
3703 If neither PRIMARY_URL@REVISION1 nor PRIMARY_URL@REVISION2 exist then
3704 there is nothing to merge to CHILD->ABSPATH so set CHILD->REMAINING_RANGES
3705 equal to PARENT->REMAINING_RANGES. This will cause the subtree to
3706 effectively ignore CHILD -- see 'Note: If the first svn_merge_range_t...'
3707 in drive_merge_report_editor()'s doc string.
3708
3709 If PRIMARY_URL@REVISION1 *xor* PRIMARY_URL@REVISION2 exist then we take the
3710 subset of REVISION1:REVISION2 in CHILD->REMAINING_RANGES at which
3711 PRIMARY_URL doesn't exist and set that subset equal to
3712 PARENT->REMAINING_RANGES' intersection with that non-existent range. Why?
3713 Because this causes CHILD->REMAINING_RANGES to be identical to
3714 PARENT->REMAINING_RANGES for revisions between REVISION1 and REVISION2 at
3715 which PRIMARY_URL doesn't exist. As mentioned above this means that
3716 drive_merge_report_editor() won't attempt to describe these non-existent
3717 subtree path/ranges to the reporter (which would break the merge).
3718
3719 If the preceding paragraph wasn't terribly clear then what follows spells
3720 out this function's behavior a bit more explicitly:
3721
3722 For forward merges (REVISION1 < REVISION2)
3723
3724 If PRIMARY_URL@REVISION1 exists but PRIMARY_URL@REVISION2 doesn't, then
3725 find the revision 'N' in which PRIMARY_URL@REVISION1 was deleted. Leave
3726 the subset of CHILD->REMAINING_RANGES that intersects with
3727 REVISION1:(N - 1) as-is and set the subset of CHILD->REMAINING_RANGES
3728 that intersects with (N - 1):REVISION2 equal to PARENT->REMAINING_RANGES'
3729 intersection with (N - 1):REVISION2.
3730
3731 If PRIMARY_URL@REVISION1 doesn't exist but PRIMARY_URL@REVISION2 does,
3732 then find the revision 'M' in which PRIMARY_URL@REVISION2 came into
3733 existence. Leave the subset of CHILD->REMAINING_RANGES that intersects with
3734 (M - 1):REVISION2 as-is and set the subset of CHILD->REMAINING_RANGES
3735 that intersects with REVISION1:(M - 1) equal to PARENT->REMAINING_RANGES'
3736 intersection with REVISION1:(M - 1).
3737
3738 For reverse merges (REVISION1 > REVISION2)
3739
3740 If PRIMARY_URL@REVISION1 exists but PRIMARY_URL@REVISION2 doesn't, then
3741 find the revision 'N' in which PRIMARY_URL@REVISION1 came into existence.
3742 Leave the subset of CHILD->REMAINING_RANGES that intersects with
3743 REVISION2:(N - 1) as-is and set the subset of CHILD->REMAINING_RANGES
3744 that intersects with (N - 1):REVISION1 equal to PARENT->REMAINING_RANGES'
3745 intersection with (N - 1):REVISION1.
3746
3747 If PRIMARY_URL@REVISION1 doesn't exist but PRIMARY_URL@REVISION2 does,
3748 then find the revision 'M' in which PRIMARY_URL@REVISION2 came into
3749 existence. Leave the subset of CHILD->REMAINING_RANGES that intersects with
3750 REVISION2:(M - 1) as-is and set the subset of CHILD->REMAINING_RANGES
3751 that intersects with (M - 1):REVISION1 equal to PARENT->REMAINING_RANGES'
3752 intersection with REVISION1:(M - 1).
3753
3754 SCRATCH_POOL is used for all temporary allocations. Changes to CHILD are
3755 allocated in RESULT_POOL. */
3756 static svn_error_t *
adjust_deleted_subtree_ranges(svn_client__merge_path_t * child,svn_client__merge_path_t * parent,svn_revnum_t revision1,svn_revnum_t revision2,const char * primary_url,svn_ra_session_t * ra_session,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)3757 adjust_deleted_subtree_ranges(svn_client__merge_path_t *child,
3758 svn_client__merge_path_t *parent,
3759 svn_revnum_t revision1,
3760 svn_revnum_t revision2,
3761 const char *primary_url,
3762 svn_ra_session_t *ra_session,
3763 svn_client_ctx_t *ctx,
3764 apr_pool_t *result_pool,
3765 apr_pool_t *scratch_pool)
3766 {
3767 svn_boolean_t is_rollback = revision2 < revision1;
3768 svn_revnum_t younger_rev = is_rollback ? revision1 : revision2;
3769 svn_revnum_t peg_rev = younger_rev;
3770 svn_revnum_t older_rev = is_rollback ? revision2 : revision1;
3771 apr_array_header_t *segments;
3772 svn_error_t *err;
3773
3774 SVN_ERR_ASSERT(parent->remaining_ranges);
3775
3776 err = svn_client__repos_location_segments(&segments, ra_session,
3777 primary_url, peg_rev,
3778 younger_rev, older_rev, ctx,
3779 scratch_pool);
3780
3781 /* If PRIMARY_URL@peg_rev doesn't exist then
3782 svn_client__repos_location_segments() typically returns an
3783 SVN_ERR_FS_NOT_FOUND error, but if it doesn't exist for a
3784 forward merge over ra_neon then we get SVN_ERR_RA_DAV_REQUEST_FAILED.
3785 http://subversion.tigris.org/issues/show_bug.cgi?id=3137 fixed some of
3786 the cases where different RA layers returned different error codes to
3787 signal the "path not found"...but it looks like there is more to do.
3788
3789 ### Do we still need to special case for ra_neon (since it no longer
3790 exists)? */
3791 if (err)
3792 {
3793 if (err->apr_err == SVN_ERR_FS_NOT_FOUND
3794 || err->apr_err == SVN_ERR_RA_DAV_REQUEST_FAILED)
3795 {
3796 /* PRIMARY_URL@peg_rev doesn't exist. Check if PRIMARY_URL@older_rev
3797 exists, if neither exist then the editor can simply ignore this
3798 subtree. */
3799 const char *rel_source_path; /* PRIMARY_URL relative to RA_SESSION */
3800 svn_node_kind_t kind;
3801
3802 svn_error_clear(err);
3803 err = NULL;
3804
3805 SVN_ERR(svn_ra_get_path_relative_to_session(
3806 ra_session, &rel_source_path, primary_url, scratch_pool));
3807
3808 SVN_ERR(svn_ra_check_path(ra_session, rel_source_path,
3809 older_rev, &kind, scratch_pool));
3810 if (kind == svn_node_none)
3811 {
3812 /* Neither PRIMARY_URL@peg_rev nor PRIMARY_URL@older_rev exist,
3813 so there is nothing to merge. Set CHILD->REMAINING_RANGES
3814 identical to PARENT's. */
3815 child->remaining_ranges =
3816 svn_rangelist_dup(parent->remaining_ranges, scratch_pool);
3817 }
3818 else
3819 {
3820 svn_rangelist_t *deleted_rangelist;
3821 svn_revnum_t rev_primary_url_deleted;
3822
3823 /* PRIMARY_URL@older_rev exists, so it was deleted at some
3824 revision prior to peg_rev, find that revision. */
3825 SVN_ERR(svn_ra_get_deleted_rev(ra_session, rel_source_path,
3826 older_rev, younger_rev,
3827 &rev_primary_url_deleted,
3828 scratch_pool));
3829
3830 /* PRIMARY_URL@older_rev exists and PRIMARY_URL@peg_rev doesn't,
3831 so svn_ra_get_deleted_rev() should always find the revision
3832 PRIMARY_URL@older_rev was deleted. */
3833 SVN_ERR_ASSERT(SVN_IS_VALID_REVNUM(rev_primary_url_deleted));
3834
3835 /* If this is a reverse merge reorder CHILD->REMAINING_RANGES and
3836 PARENT->REMAINING_RANGES so both will work with the
3837 svn_rangelist_* APIs below. */
3838 if (is_rollback)
3839 {
3840 /* svn_rangelist_reverse operates in place so it's safe
3841 to use our scratch_pool. */
3842 SVN_ERR(svn_rangelist_reverse(child->remaining_ranges,
3843 scratch_pool));
3844 SVN_ERR(svn_rangelist_reverse(parent->remaining_ranges,
3845 scratch_pool));
3846 }
3847
3848 /* Find the intersection of CHILD->REMAINING_RANGES with the
3849 range over which PRIMARY_URL@older_rev exists (ending at
3850 the youngest revision at which it still exists). */
3851 SVN_ERR(rangelist_intersect_range(&child->remaining_ranges,
3852 child->remaining_ranges,
3853 older_rev,
3854 rev_primary_url_deleted - 1,
3855 FALSE,
3856 scratch_pool, scratch_pool));
3857
3858 /* Merge into CHILD->REMAINING_RANGES the intersection of
3859 PARENT->REMAINING_RANGES with the range beginning when
3860 PRIMARY_URL@older_rev was deleted until younger_rev. */
3861 SVN_ERR(rangelist_intersect_range(&deleted_rangelist,
3862 parent->remaining_ranges,
3863 rev_primary_url_deleted - 1,
3864 peg_rev,
3865 FALSE,
3866 scratch_pool, scratch_pool));
3867 SVN_ERR(svn_rangelist_merge2(child->remaining_ranges,
3868 deleted_rangelist, scratch_pool,
3869 scratch_pool));
3870
3871 /* Return CHILD->REMAINING_RANGES and PARENT->REMAINING_RANGES
3872 to reverse order if necessary. */
3873 if (is_rollback)
3874 {
3875 SVN_ERR(svn_rangelist_reverse(child->remaining_ranges,
3876 scratch_pool));
3877 SVN_ERR(svn_rangelist_reverse(parent->remaining_ranges,
3878 scratch_pool));
3879 }
3880 }
3881 }
3882 else
3883 {
3884 return svn_error_trace(err);
3885 }
3886 }
3887 else /* PRIMARY_URL@peg_rev exists. */
3888 {
3889 svn_rangelist_t *non_existent_rangelist;
3890 svn_location_segment_t *segment =
3891 APR_ARRAY_IDX(segments, (segments->nelts - 1),
3892 svn_location_segment_t *);
3893
3894 /* We know PRIMARY_URL@peg_rev exists as the call to
3895 svn_client__repos_location_segments() succeeded. If there is only
3896 one segment that starts at oldest_rev then we know that
3897 PRIMARY_URL@oldest_rev:PRIMARY_URL@peg_rev describes an unbroken
3898 line of history, so there is nothing more to adjust in
3899 CHILD->REMAINING_RANGES. */
3900 if (segment->range_start == older_rev)
3901 {
3902 return SVN_NO_ERROR;
3903 }
3904
3905 /* If this is a reverse merge reorder CHILD->REMAINING_RANGES and
3906 PARENT->REMAINING_RANGES so both will work with the
3907 svn_rangelist_* APIs below. */
3908 if (is_rollback)
3909 {
3910 SVN_ERR(svn_rangelist_reverse(child->remaining_ranges,
3911 scratch_pool));
3912 SVN_ERR(svn_rangelist_reverse(parent->remaining_ranges,
3913 scratch_pool));
3914 }
3915
3916 /* Intersect CHILD->REMAINING_RANGES with the range where PRIMARY_URL
3917 exists. Since segment doesn't span older_rev:peg_rev we know
3918 PRIMARY_URL@peg_rev didn't come into existence until
3919 segment->range_start + 1. */
3920 SVN_ERR(rangelist_intersect_range(&child->remaining_ranges,
3921 child->remaining_ranges,
3922 segment->range_start, peg_rev,
3923 FALSE, scratch_pool, scratch_pool));
3924
3925 /* Merge into CHILD->REMAINING_RANGES the intersection of
3926 PARENT->REMAINING_RANGES with the range before PRIMARY_URL@peg_rev
3927 came into existence. */
3928 SVN_ERR(rangelist_intersect_range(&non_existent_rangelist,
3929 parent->remaining_ranges,
3930 older_rev, segment->range_start,
3931 FALSE, scratch_pool, scratch_pool));
3932 SVN_ERR(svn_rangelist_merge2(child->remaining_ranges,
3933 non_existent_rangelist, scratch_pool,
3934 scratch_pool));
3935
3936 /* Return CHILD->REMAINING_RANGES and PARENT->REMAINING_RANGES
3937 to reverse order if necessary. */
3938 if (is_rollback)
3939 {
3940 SVN_ERR(svn_rangelist_reverse(child->remaining_ranges,
3941 scratch_pool));
3942 SVN_ERR(svn_rangelist_reverse(parent->remaining_ranges,
3943 scratch_pool));
3944 }
3945 }
3946
3947 /* Make a lasting copy of CHILD->REMAINING_RANGES using POOL. */
3948 child->remaining_ranges = svn_rangelist_dup(child->remaining_ranges,
3949 result_pool);
3950 return SVN_NO_ERROR;
3951 }
3952
3953 /* Helper for do_directory_merge().
3954
3955 SOURCE is cascaded from the argument of the same name in
3956 do_directory_merge(). TARGET is the merge target. RA_SESSION is the
3957 session for the younger of SOURCE->loc1 and SOURCE->loc2.
3958
3959 Adjust the subtrees in CHILDREN_WITH_MERGEINFO so that we don't
3960 later try to describe invalid paths in drive_merge_report_editor().
3961 This function is just a thin wrapper around
3962 adjust_deleted_subtree_ranges(), which see for further details.
3963
3964 SCRATCH_POOL is used for all temporary allocations. Changes to
3965 CHILDREN_WITH_MERGEINFO are allocated in RESULT_POOL.
3966 */
3967 static svn_error_t *
fix_deleted_subtree_ranges(const merge_source_t * source,const merge_target_t * target,svn_ra_session_t * ra_session,apr_array_header_t * children_with_mergeinfo,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)3968 fix_deleted_subtree_ranges(const merge_source_t *source,
3969 const merge_target_t *target,
3970 svn_ra_session_t *ra_session,
3971 apr_array_header_t *children_with_mergeinfo,
3972 svn_client_ctx_t *ctx,
3973 apr_pool_t *result_pool,
3974 apr_pool_t *scratch_pool)
3975 {
3976 int i;
3977 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
3978 svn_boolean_t is_rollback = source->loc2->rev < source->loc1->rev;
3979
3980 assert(session_url_is(ra_session,
3981 (is_rollback ? source->loc1 : source->loc2)->url,
3982 scratch_pool));
3983
3984 /* CHILDREN_WITH_MERGEINFO is sorted in depth-first order, so
3985 start at index 1 to examine only subtrees. */
3986 for (i = 1; i < children_with_mergeinfo->nelts; i++)
3987 {
3988 svn_client__merge_path_t *child =
3989 APR_ARRAY_IDX(children_with_mergeinfo, i, svn_client__merge_path_t *);
3990 svn_client__merge_path_t *parent;
3991 svn_rangelist_t *deleted_rangelist, *added_rangelist;
3992
3993 SVN_ERR_ASSERT(child);
3994 if (child->absent)
3995 continue;
3996
3997 svn_pool_clear(iterpool);
3998
3999 /* Find CHILD's parent. */
4000 parent = find_nearest_ancestor(children_with_mergeinfo,
4001 FALSE, child->abspath);
4002
4003 /* Since CHILD is a subtree then its parent must be in
4004 CHILDREN_WITH_MERGEINFO, see the global comment
4005 'THE CHILDREN_WITH_MERGEINFO ARRAY'. */
4006 SVN_ERR_ASSERT(parent);
4007
4008 /* If this is a reverse merge reorder CHILD->REMAINING_RANGES
4009 so it will work with the svn_rangelist_diff API. */
4010 if (is_rollback)
4011 {
4012 SVN_ERR(svn_rangelist_reverse(child->remaining_ranges, iterpool));
4013 SVN_ERR(svn_rangelist_reverse(parent->remaining_ranges, iterpool));
4014 }
4015
4016 SVN_ERR(svn_rangelist_diff(&deleted_rangelist, &added_rangelist,
4017 child->remaining_ranges,
4018 parent->remaining_ranges,
4019 TRUE, iterpool));
4020
4021 if (is_rollback)
4022 {
4023 SVN_ERR(svn_rangelist_reverse(child->remaining_ranges, iterpool));
4024 SVN_ERR(svn_rangelist_reverse(parent->remaining_ranges, iterpool));
4025 }
4026
4027 /* If CHILD is the merge target we then know that SOURCE is provided
4028 by normalize_merge_sources() -- see 'MERGEINFO MERGE SOURCE
4029 NORMALIZATION'. Due to this normalization we know that SOURCE
4030 describes an unbroken line of history such that the entire range
4031 described by SOURCE can potentially be merged to CHILD.
4032
4033 But if CHILD is a subtree we don't have the same guarantees about
4034 SOURCE as we do for the merge target. SOURCE->loc1 and/or
4035 SOURCE->loc2 might not exist.
4036
4037 If one or both doesn't exist, then adjust CHILD->REMAINING_RANGES
4038 such that we don't later try to describe invalid subtrees in
4039 drive_merge_report_editor(), as that will break the merge.
4040 If CHILD has the same remaining ranges as PARENT however, then
4041 there is no need to make these adjustments, since
4042 drive_merge_report_editor() won't attempt to describe CHILD in this
4043 case, see the 'Note' in drive_merge_report_editor's docstring. */
4044 if (deleted_rangelist->nelts || added_rangelist->nelts)
4045 {
4046 const char *child_primary_source_url;
4047 const char *child_repos_src_path =
4048 svn_dirent_is_child(target->abspath, child->abspath, iterpool);
4049
4050 /* This loop is only processing subtrees, so CHILD->ABSPATH
4051 better be a proper child of the merge target. */
4052 SVN_ERR_ASSERT(child_repos_src_path);
4053
4054 child_primary_source_url =
4055 svn_path_url_add_component2((source->loc1->rev < source->loc2->rev)
4056 ? source->loc2->url : source->loc1->url,
4057 child_repos_src_path, iterpool);
4058
4059 SVN_ERR(adjust_deleted_subtree_ranges(child, parent,
4060 source->loc1->rev,
4061 source->loc2->rev,
4062 child_primary_source_url,
4063 ra_session,
4064 ctx, result_pool, iterpool));
4065 }
4066 }
4067
4068 svn_pool_destroy(iterpool);
4069 return SVN_NO_ERROR;
4070 }
4071
4072 /*-----------------------------------------------------------------------*/
4073
4074 /*** Determining What Remains To Be Merged ***/
4075
4076 /* Get explicit and/or implicit mergeinfo for the working copy path
4077 TARGET_ABSPATH.
4078
4079 If RECORDED_MERGEINFO is not NULL then set *RECORDED_MERGEINFO
4080 to TARGET_ABSPATH's explicit or inherited mergeinfo as dictated by
4081 INHERIT.
4082
4083 If IMPLICIT_MERGEINFO is not NULL then set *IMPLICIT_MERGEINFO
4084 to TARGET_ABSPATH's implicit mergeinfo (a.k.a. natural history).
4085
4086 If both RECORDED_MERGEINFO and IMPLICIT_MERGEINFO are not NULL and
4087 *RECORDED_MERGEINFO is inherited, then *IMPLICIT_MERGEINFO will be
4088 removed from *RECORDED_MERGEINFO.
4089
4090 If INHERITED is not NULL set *INHERITED to TRUE if *RECORDED_MERGEINFO
4091 is inherited rather than explicit. If RECORDED_MERGEINFO is NULL then
4092 INHERITED is ignored.
4093
4094
4095 If IMPLICIT_MERGEINFO is not NULL then START and END are limits on
4096 the natural history sought, must both be valid revision numbers, and
4097 START must be greater than END. If TARGET_ABSPATH's base revision
4098 is older than START, then the base revision is used as the younger
4099 bound in place of START.
4100
4101 RA_SESSION is an RA session open to the repository in which TARGET_ABSPATH
4102 lives. It may be temporarily reparented as needed by this function.
4103
4104 Allocate *RECORDED_MERGEINFO and *IMPLICIT_MERGEINFO in RESULT_POOL.
4105 Use SCRATCH_POOL for any temporary allocations. */
4106 static svn_error_t *
get_full_mergeinfo(svn_mergeinfo_t * recorded_mergeinfo,svn_mergeinfo_t * implicit_mergeinfo,svn_boolean_t * inherited,svn_mergeinfo_inheritance_t inherit,svn_ra_session_t * ra_session,const char * target_abspath,svn_revnum_t start,svn_revnum_t end,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)4107 get_full_mergeinfo(svn_mergeinfo_t *recorded_mergeinfo,
4108 svn_mergeinfo_t *implicit_mergeinfo,
4109 svn_boolean_t *inherited,
4110 svn_mergeinfo_inheritance_t inherit,
4111 svn_ra_session_t *ra_session,
4112 const char *target_abspath,
4113 svn_revnum_t start,
4114 svn_revnum_t end,
4115 svn_client_ctx_t *ctx,
4116 apr_pool_t *result_pool,
4117 apr_pool_t *scratch_pool)
4118 {
4119 /* First, we get the real mergeinfo. */
4120 if (recorded_mergeinfo)
4121 {
4122 SVN_ERR(svn_client__get_wc_or_repos_mergeinfo(recorded_mergeinfo,
4123 inherited,
4124 NULL /* from_repos */,
4125 FALSE,
4126 inherit, ra_session,
4127 target_abspath,
4128 ctx, result_pool));
4129 }
4130
4131 if (implicit_mergeinfo)
4132 {
4133 svn_client__pathrev_t *target;
4134
4135 /* Assert that we have sane input. */
4136 SVN_ERR_ASSERT(SVN_IS_VALID_REVNUM(start) && SVN_IS_VALID_REVNUM(end)
4137 && (start > end));
4138
4139 /* Retrieve the origin (original_*) of the node, or just the
4140 url if the node was not copied. */
4141 SVN_ERR(svn_client__wc_node_get_origin(&target, target_abspath, ctx,
4142 scratch_pool, scratch_pool));
4143
4144 if (! target)
4145 {
4146 /* We've been asked to operate on a locally added target, so its
4147 * implicit mergeinfo is empty. */
4148 *implicit_mergeinfo = apr_hash_make(result_pool);
4149 }
4150 else if (target->rev <= end)
4151 {
4152 /* We're asking about a range outside our natural history
4153 altogether. That means our implicit mergeinfo is empty. */
4154 *implicit_mergeinfo = apr_hash_make(result_pool);
4155 }
4156 else
4157 {
4158 /* Fetch so-called "implicit mergeinfo" (that is, natural
4159 history). */
4160
4161 /* Do not ask for implicit mergeinfo from TARGET_ABSPATH's future.
4162 TARGET_ABSPATH might not even exist, and even if it does the
4163 working copy is *at* TARGET_REV so its implicit history ends
4164 at TARGET_REV! */
4165 if (target->rev < start)
4166 start = target->rev;
4167
4168 /* Fetch the implicit mergeinfo. */
4169 SVN_ERR(svn_client__get_history_as_mergeinfo(implicit_mergeinfo,
4170 NULL,
4171 target, start, end,
4172 ra_session, ctx,
4173 result_pool));
4174 }
4175 } /*if (implicit_mergeinfo) */
4176
4177 return SVN_NO_ERROR;
4178 }
4179
4180 /* Helper for ensure_implicit_mergeinfo().
4181
4182 PARENT, CHILD, REVISION1, REVISION2 and CTX
4183 are all cascaded from the arguments of the same names in
4184 ensure_implicit_mergeinfo(). PARENT and CHILD must both exist, i.e.
4185 this function should never be called where CHILD is the merge target.
4186
4187 If PARENT->IMPLICIT_MERGEINFO is NULL, obtain it from the server.
4188
4189 Set CHILD->IMPLICIT_MERGEINFO to the mergeinfo inherited from
4190 PARENT->IMPLICIT_MERGEINFO. CHILD->IMPLICIT_MERGEINFO is allocated
4191 in RESULT_POOL.
4192
4193 RA_SESSION is an RA session open to the repository that contains CHILD.
4194 It may be temporarily reparented by this function.
4195 */
4196 static svn_error_t *
inherit_implicit_mergeinfo_from_parent(svn_client__merge_path_t * parent,svn_client__merge_path_t * child,svn_revnum_t revision1,svn_revnum_t revision2,svn_ra_session_t * ra_session,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)4197 inherit_implicit_mergeinfo_from_parent(svn_client__merge_path_t *parent,
4198 svn_client__merge_path_t *child,
4199 svn_revnum_t revision1,
4200 svn_revnum_t revision2,
4201 svn_ra_session_t *ra_session,
4202 svn_client_ctx_t *ctx,
4203 apr_pool_t *result_pool,
4204 apr_pool_t *scratch_pool)
4205 {
4206 const char *path_diff;
4207
4208 /* This only works on subtrees! */
4209 SVN_ERR_ASSERT(parent);
4210 SVN_ERR_ASSERT(child);
4211
4212 /* While PARENT must exist, it is possible we've deferred
4213 getting its implicit mergeinfo. If so get it now. */
4214 if (!parent->implicit_mergeinfo)
4215 SVN_ERR(get_full_mergeinfo(NULL, &(parent->implicit_mergeinfo),
4216 NULL, svn_mergeinfo_inherited,
4217 ra_session, child->abspath,
4218 MAX(revision1, revision2),
4219 MIN(revision1, revision2),
4220 ctx, result_pool, scratch_pool));
4221
4222 /* Let CHILD inherit PARENT's implicit mergeinfo. */
4223
4224 path_diff = svn_dirent_is_child(parent->abspath, child->abspath,
4225 scratch_pool);
4226 /* PARENT->PATH better be an ancestor of CHILD->ABSPATH! */
4227 SVN_ERR_ASSERT(path_diff);
4228
4229 SVN_ERR(svn_mergeinfo__add_suffix_to_mergeinfo(
4230 &child->implicit_mergeinfo, parent->implicit_mergeinfo,
4231 path_diff, result_pool, scratch_pool));
4232 child->implicit_mergeinfo = svn_mergeinfo_dup(child->implicit_mergeinfo,
4233 result_pool);
4234 return SVN_NO_ERROR;
4235 }
4236
4237 /* Helper of filter_merged_revisions().
4238
4239 If we have deferred obtaining CHILD->IMPLICIT_MERGEINFO, then get
4240 it now, allocating it in RESULT_POOL. If CHILD_INHERITS_PARENT is true
4241 then set CHILD->IMPLICIT_MERGEINFO to the mergeinfo inherited from
4242 PARENT->IMPLICIT_MERGEINFO, otherwise contact the repository. Use
4243 SCRATCH_POOL for all temporary allocations.
4244
4245 RA_SESSION is an RA session open to the repository that contains CHILD.
4246 It may be temporarily reparented by this function.
4247
4248 PARENT, CHILD, REVISION1, REVISION2 and
4249 CTX are all cascaded from the arguments of the same name in
4250 filter_merged_revisions() and the same conditions for that function
4251 hold here. */
4252 static svn_error_t *
ensure_implicit_mergeinfo(svn_client__merge_path_t * parent,svn_client__merge_path_t * child,svn_boolean_t child_inherits_parent,svn_revnum_t revision1,svn_revnum_t revision2,svn_ra_session_t * ra_session,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)4253 ensure_implicit_mergeinfo(svn_client__merge_path_t *parent,
4254 svn_client__merge_path_t *child,
4255 svn_boolean_t child_inherits_parent,
4256 svn_revnum_t revision1,
4257 svn_revnum_t revision2,
4258 svn_ra_session_t *ra_session,
4259 svn_client_ctx_t *ctx,
4260 apr_pool_t *result_pool,
4261 apr_pool_t *scratch_pool)
4262 {
4263 /* If we haven't already found CHILD->IMPLICIT_MERGEINFO then
4264 contact the server to get it. */
4265
4266 if (child->implicit_mergeinfo)
4267 return SVN_NO_ERROR;
4268
4269 if (child_inherits_parent)
4270 SVN_ERR(inherit_implicit_mergeinfo_from_parent(parent,
4271 child,
4272 revision1,
4273 revision2,
4274 ra_session,
4275 ctx,
4276 result_pool,
4277 scratch_pool));
4278 else
4279 SVN_ERR(get_full_mergeinfo(NULL,
4280 &(child->implicit_mergeinfo),
4281 NULL, svn_mergeinfo_inherited,
4282 ra_session, child->abspath,
4283 MAX(revision1, revision2),
4284 MIN(revision1, revision2),
4285 ctx, result_pool, scratch_pool));
4286
4287 return SVN_NO_ERROR;
4288 }
4289
4290 /* Helper for calculate_remaining_ranges().
4291
4292 Initialize CHILD->REMAINING_RANGES to a rangelist representing the
4293 requested merge of REVISION1:REVISION2 from MERGEINFO_PATH to
4294 CHILD->ABSPATH.
4295
4296 For forward merges remove any ranges from CHILD->REMAINING_RANGES that
4297 have already been merged to CHILD->ABSPATH per TARGET_MERGEINFO or
4298 CHILD->IMPLICIT_MERGEINFO. For reverse merges remove any ranges from
4299 CHILD->REMAINING_RANGES that have not already been merged to CHILD->ABSPATH
4300 per TARGET_MERGEINFO or CHILD->IMPLICIT_MERGEINFO. If we have deferred
4301 obtaining CHILD->IMPLICIT_MERGEINFO and it is necessary to use it for
4302 these calculations, then get it from the server, allocating it in
4303 RESULT_POOL.
4304
4305 CHILD represents a working copy path which is the merge target or one of
4306 the target's subtrees. If not NULL, PARENT is CHILD's nearest path-wise
4307 ancestor - see 'THE CHILDREN_WITH_MERGEINFO ARRAY'.
4308
4309 If the function needs to consider CHILD->IMPLICIT_MERGEINFO and
4310 CHILD_INHERITS_IMPLICIT is true, then set CHILD->IMPLICIT_MERGEINFO to the
4311 mergeinfo inherited from PARENT->IMPLICIT_MERGEINFO. Otherwise contact
4312 the repository for CHILD->IMPLICIT_MERGEINFO.
4313
4314 NOTE: If PARENT is present then this function must have previously been
4315 called for PARENT, i.e. if populate_remaining_ranges() is calling this
4316 function for a set of svn_client__merge_path_t* the calls must be made
4317 in depth-first order.
4318
4319 MERGEINFO_PATH is the merge source relative to the repository root.
4320
4321 REVISION1 and REVISION2 describe the merge range requested from
4322 MERGEINFO_PATH.
4323
4324 TARGET_RANGELIST is the portion of CHILD->ABSPATH's explicit or inherited
4325 mergeinfo that intersects with the merge history described by
4326 MERGEINFO_PATH@REVISION1:MERGEINFO_PATH@REVISION2. TARGET_RANGELIST
4327 should be NULL if there is no explicit or inherited mergeinfo on
4328 CHILD->ABSPATH or an empty list if CHILD->ABSPATH has empty mergeinfo or
4329 explicit mergeinfo that exclusively describes non-intersecting history
4330 with MERGEINFO_PATH@REVISION1:MERGEINFO_PATH@REVISION2.
4331
4332 SCRATCH_POOL is used for all temporary allocations.
4333
4334 NOTE: This should only be called when honoring mergeinfo.
4335
4336 NOTE: Like calculate_remaining_ranges() if PARENT is present then this
4337 function must have previously been called for PARENT.
4338 */
4339 static svn_error_t *
filter_merged_revisions(svn_client__merge_path_t * parent,svn_client__merge_path_t * child,const char * mergeinfo_path,svn_rangelist_t * target_rangelist,svn_revnum_t revision1,svn_revnum_t revision2,svn_boolean_t child_inherits_implicit,svn_ra_session_t * ra_session,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)4340 filter_merged_revisions(svn_client__merge_path_t *parent,
4341 svn_client__merge_path_t *child,
4342 const char *mergeinfo_path,
4343 svn_rangelist_t *target_rangelist,
4344 svn_revnum_t revision1,
4345 svn_revnum_t revision2,
4346 svn_boolean_t child_inherits_implicit,
4347 svn_ra_session_t *ra_session,
4348 svn_client_ctx_t *ctx,
4349 apr_pool_t *result_pool,
4350 apr_pool_t *scratch_pool)
4351 {
4352 svn_rangelist_t *requested_rangelist,
4353 *target_implicit_rangelist, *explicit_rangelist;
4354
4355 /* Convert REVISION1 and REVISION2 to a rangelist.
4356
4357 Note: Talking about a requested merge range's inheritability
4358 doesn't make much sense, but as we are using svn_merge_range_t
4359 to describe it we need to pick *something*. Since all the
4360 rangelist manipulations in this function either don't consider
4361 inheritance by default or we are requesting that they don't (i.e.
4362 svn_rangelist_remove and svn_rangelist_intersect) then we could
4363 set the inheritability as FALSE, it won't matter either way. */
4364 requested_rangelist = svn_rangelist__initialize(revision1, revision2,
4365 TRUE, scratch_pool);
4366
4367 /* Now filter out revisions that have already been merged to CHILD. */
4368
4369 if (revision1 > revision2) /* This is a reverse merge. */
4370 {
4371 svn_rangelist_t *added_rangelist, *deleted_rangelist;
4372
4373 /* The revert range and will need to be reversed for
4374 our svn_rangelist_* APIs to work properly. */
4375 SVN_ERR(svn_rangelist_reverse(requested_rangelist, scratch_pool));
4376
4377 /* Set EXPLICIT_RANGELIST to the list of source-range revs that are
4378 already recorded as merged to target. */
4379 if (target_rangelist)
4380 {
4381 /* Return the intersection of the revs which are both already
4382 represented by CHILD's explicit or inherited mergeinfo.
4383
4384 We don't consider inheritance when determining intersecting
4385 ranges. If we *did* consider inheritance, then our calculation
4386 would be wrong. For example, if the CHILD->REMAINING_RANGES is
4387 5:3 and TARGET_RANGELIST is r5* (non-inheritable) then the
4388 intersection would be r4. And that would be wrong as we clearly
4389 want to reverse merge both r4 and r5 in this case. Ignoring the
4390 ranges' inheritance results in an intersection of r4-5.
4391
4392 You might be wondering about CHILD's children, doesn't the above
4393 imply that we will reverse merge r4-5 from them? Nope, this is
4394 safe to do because any path whose parent has non-inheritable
4395 ranges is always considered a subtree with differing mergeinfo
4396 even if that path has no explicit mergeinfo prior to the
4397 merge -- See condition 3 in the doc string for
4398 merge.c:get_mergeinfo_paths(). */
4399 SVN_ERR(svn_rangelist_intersect(&explicit_rangelist,
4400 target_rangelist,
4401 requested_rangelist,
4402 FALSE, scratch_pool));
4403 }
4404 else
4405 {
4406 explicit_rangelist =
4407 apr_array_make(result_pool, 0, sizeof(svn_merge_range_t *));
4408 }
4409
4410 /* Was any part of the requested reverse merge not accounted for in
4411 CHILD's explicit or inherited mergeinfo? */
4412 SVN_ERR(svn_rangelist_diff(&deleted_rangelist, &added_rangelist,
4413 requested_rangelist, explicit_rangelist,
4414 FALSE, scratch_pool));
4415
4416 if (deleted_rangelist->nelts == 0)
4417 {
4418 /* The whole of REVISION1:REVISION2 was represented in CHILD's
4419 explicit/inherited mergeinfo, allocate CHILD's remaining
4420 ranges in POOL and then we are done. */
4421 SVN_ERR(svn_rangelist_reverse(requested_rangelist, scratch_pool));
4422 child->remaining_ranges = svn_rangelist_dup(requested_rangelist,
4423 result_pool);
4424 }
4425 else /* We need to check CHILD's implicit mergeinfo. */
4426 {
4427 svn_rangelist_t *implicit_rangelist;
4428
4429 SVN_ERR(ensure_implicit_mergeinfo(parent,
4430 child,
4431 child_inherits_implicit,
4432 revision1,
4433 revision2,
4434 ra_session,
4435 ctx,
4436 result_pool,
4437 scratch_pool));
4438
4439 target_implicit_rangelist = svn_hash_gets(child->implicit_mergeinfo,
4440 mergeinfo_path);
4441
4442 if (target_implicit_rangelist)
4443 SVN_ERR(svn_rangelist_intersect(&implicit_rangelist,
4444 target_implicit_rangelist,
4445 requested_rangelist,
4446 FALSE, scratch_pool));
4447 else
4448 implicit_rangelist = apr_array_make(scratch_pool, 0,
4449 sizeof(svn_merge_range_t *));
4450
4451 SVN_ERR(svn_rangelist_merge2(implicit_rangelist,
4452 explicit_rangelist, scratch_pool,
4453 scratch_pool));
4454 SVN_ERR(svn_rangelist_reverse(implicit_rangelist, scratch_pool));
4455 child->remaining_ranges = svn_rangelist_dup(implicit_rangelist,
4456 result_pool);
4457 }
4458 }
4459 else /* This is a forward merge */
4460 {
4461 /* Set EXPLICIT_RANGELIST to the list of source-range revs that are
4462 NOT already recorded as merged to target. */
4463 if (target_rangelist)
4464 {
4465 /* See earlier comment preceding svn_rangelist_intersect() for
4466 why we don't consider inheritance here. */
4467 SVN_ERR(svn_rangelist_remove(&explicit_rangelist,
4468 target_rangelist,
4469 requested_rangelist, FALSE,
4470 scratch_pool));
4471 }
4472 else
4473 {
4474 explicit_rangelist = svn_rangelist_dup(requested_rangelist,
4475 scratch_pool);
4476 }
4477
4478 if (explicit_rangelist->nelts == 0)
4479 {
4480 child->remaining_ranges =
4481 apr_array_make(result_pool, 0, sizeof(svn_merge_range_t *));
4482 }
4483 else
4484 /* ### TODO: Which evil shall we choose?
4485 ###
4486 ### If we allow all forward-merges not already found in recorded
4487 ### mergeinfo, we destroy the ability to, say, merge the whole of a
4488 ### branch to the trunk while automatically ignoring the revisions
4489 ### common to both. That's bad.
4490 ###
4491 ### If we allow only forward-merges not found in either recorded
4492 ### mergeinfo or implicit mergeinfo (natural history), then the
4493 ### previous scenario works great, but we can't reverse-merge a
4494 ### previous change made to our line of history and then remake it
4495 ### (because the reverse-merge will leave no mergeinfo trace, and
4496 ### the remake-it attempt will still find the original change in
4497 ### natural mergeinfo. But you know, that we happen to use 'merge'
4498 ### for revision undoing is somewhat unnatural anyway, so I'm
4499 ### finding myself having little interest in caring too much about
4500 ### this. That said, if we had a way of storing reverse merge
4501 ### ranges, we'd be in good shape either way.
4502 */
4503 #ifdef SVN_MERGE__ALLOW_ALL_FORWARD_MERGES_FROM_SELF
4504 {
4505 /* ### Don't consider implicit mergeinfo. */
4506 child->remaining_ranges = svn_rangelist_dup(explicit_rangelist,
4507 pool);
4508 }
4509 #else
4510 {
4511 /* Based on CHILD's TARGET_MERGEINFO there are ranges to merge.
4512 Check CHILD's implicit mergeinfo to see if these remaining
4513 ranges are represented there. */
4514 SVN_ERR(ensure_implicit_mergeinfo(parent,
4515 child,
4516 child_inherits_implicit,
4517 revision1,
4518 revision2,
4519 ra_session,
4520 ctx,
4521 result_pool,
4522 scratch_pool));
4523
4524 target_implicit_rangelist = svn_hash_gets(child->implicit_mergeinfo,
4525 mergeinfo_path);
4526 if (target_implicit_rangelist)
4527 SVN_ERR(svn_rangelist_remove(&(child->remaining_ranges),
4528 target_implicit_rangelist,
4529 explicit_rangelist,
4530 FALSE, result_pool));
4531 else
4532 child->remaining_ranges = svn_rangelist_dup(explicit_rangelist,
4533 result_pool);
4534 }
4535 #endif
4536 }
4537
4538 return SVN_NO_ERROR;
4539 }
4540
4541 /* Helper for do_file_merge and do_directory_merge (by way of
4542 populate_remaining_ranges() for the latter).
4543
4544 Determine what portions of SOURCE have already
4545 been merged to CHILD->ABSPATH and populate CHILD->REMAINING_RANGES with
4546 the ranges that still need merging.
4547
4548 SOURCE and CTX are all cascaded from the caller's arguments of the same
4549 names. Note that this means SOURCE adheres to the requirements noted in
4550 `MERGEINFO MERGE SOURCE NORMALIZATION'.
4551
4552 CHILD represents a working copy path which is the merge target or one of
4553 the target's subtrees. If not NULL, PARENT is CHILD's nearest path-wise
4554 ancestor - see 'THE CHILDREN_WITH_MERGEINFO ARRAY'. TARGET_MERGEINFO is
4555 the working mergeinfo on CHILD.
4556
4557 RA_SESSION is the session for the younger of SOURCE->loc1 and
4558 SOURCE->loc2.
4559
4560 If the function needs to consider CHILD->IMPLICIT_MERGEINFO and
4561 CHILD_INHERITS_IMPLICIT is true, then set CHILD->IMPLICIT_MERGEINFO to the
4562 mergeinfo inherited from PARENT->IMPLICIT_MERGEINFO. Otherwise contact
4563 the repository for CHILD->IMPLICIT_MERGEINFO.
4564
4565 If not null, IMPLICIT_SRC_GAP is the gap, if any, in the natural history
4566 of SOURCE, see merge_cmd_baton_t.implicit_src_gap.
4567
4568 SCRATCH_POOL is used for all temporary allocations. Changes to CHILD and
4569 PARENT are made in RESULT_POOL.
4570
4571 NOTE: This should only be called when honoring mergeinfo.
4572
4573 NOTE: If PARENT is present then this function must have previously been
4574 called for PARENT, i.e. if populate_remaining_ranges() is calling this
4575 function for a set of svn_client__merge_path_t* the calls must be made
4576 in depth-first order.
4577
4578 NOTE: When performing reverse merges, return
4579 SVN_ERR_CLIENT_NOT_READY_TO_MERGE if both locations in SOURCE and
4580 CHILD->ABSPATH are all on the same line of history but CHILD->ABSPATH's
4581 base revision is older than the SOURCE->rev1:rev2 range, see comment re
4582 issue #2973 below.
4583 */
4584 static svn_error_t *
calculate_remaining_ranges(svn_client__merge_path_t * parent,svn_client__merge_path_t * child,const merge_source_t * source,svn_mergeinfo_t target_mergeinfo,const apr_array_header_t * implicit_src_gap,svn_boolean_t child_inherits_implicit,svn_ra_session_t * ra_session,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)4585 calculate_remaining_ranges(svn_client__merge_path_t *parent,
4586 svn_client__merge_path_t *child,
4587 const merge_source_t *source,
4588 svn_mergeinfo_t target_mergeinfo,
4589 const apr_array_header_t *implicit_src_gap,
4590 svn_boolean_t child_inherits_implicit,
4591 svn_ra_session_t *ra_session,
4592 svn_client_ctx_t *ctx,
4593 apr_pool_t *result_pool,
4594 apr_pool_t *scratch_pool)
4595 {
4596 const svn_client__pathrev_t *primary_src
4597 = (source->loc1->rev < source->loc2->rev) ? source->loc2 : source->loc1;
4598 const char *mergeinfo_path = svn_client__pathrev_fspath(primary_src,
4599 scratch_pool);
4600 /* Intersection of TARGET_MERGEINFO and the merge history
4601 described by SOURCE. */
4602 svn_rangelist_t *target_rangelist;
4603 svn_revnum_t child_base_revision;
4604
4605 /* Since this function should only be called when honoring mergeinfo and
4606 * SOURCE adheres to the requirements noted in 'MERGEINFO MERGE SOURCE
4607 * NORMALIZATION', SOURCE must be 'ancestral'. */
4608 SVN_ERR_ASSERT(source->ancestral);
4609
4610 /* Determine which of the requested ranges to consider merging... */
4611
4612 /* Set TARGET_RANGELIST to the portion of TARGET_MERGEINFO that refers
4613 to SOURCE (excluding any gap in SOURCE): first get all ranges from
4614 TARGET_MERGEINFO that refer to the path of SOURCE, and then prune
4615 any ranges that lie in the gap in SOURCE.
4616
4617 ### [JAF] In fact, that may still leave some ranges that lie entirely
4618 outside the range of SOURCE; it seems we don't care about that. */
4619 if (target_mergeinfo)
4620 target_rangelist = svn_hash_gets(target_mergeinfo, mergeinfo_path);
4621 else
4622 target_rangelist = NULL;
4623 if (implicit_src_gap && target_rangelist)
4624 {
4625 /* Remove any mergeinfo referring to the 'gap' in SOURCE, as that
4626 mergeinfo doesn't really refer to SOURCE at all but instead
4627 refers to locations that are non-existent or on a different
4628 line of history. (Issue #3242.) */
4629 SVN_ERR(svn_rangelist_remove(&target_rangelist,
4630 implicit_src_gap, target_rangelist,
4631 FALSE, result_pool));
4632 }
4633
4634 /* Initialize CHILD->REMAINING_RANGES and filter out revisions already
4635 merged (or, in the case of reverse merges, ranges not yet merged). */
4636 SVN_ERR(filter_merged_revisions(parent, child, mergeinfo_path,
4637 target_rangelist,
4638 source->loc1->rev, source->loc2->rev,
4639 child_inherits_implicit,
4640 ra_session, ctx, result_pool,
4641 scratch_pool));
4642
4643 /* Issue #2973 -- from the continuing series of "Why, since the advent of
4644 merge tracking, allowing merges into mixed rev and locally modified
4645 working copies isn't simple and could be considered downright evil".
4646
4647 If reverse merging a range to the WC path represented by CHILD, from
4648 that path's own history, where the path inherits no locally modified
4649 mergeinfo from its WC parents (i.e. there is no uncommitted merge to
4650 the WC), and the path's base revision is older than the range, then
4651 the merge will always be a no-op. This is because we only allow reverse
4652 merges of ranges in the path's explicit or natural mergeinfo and a
4653 reverse merge from the path's future history obviously isn't going to be
4654 in either, hence the no-op.
4655
4656 The problem is two-fold. First, in a mixed rev WC, the change we
4657 want to revert might actually be to some child of the target path
4658 which is at a younger base revision. Sure, we can merge directly
4659 to that child or update the WC or even use --ignore-ancestry and then
4660 successfully run the reverse merge, but that gets to the second
4661 problem: Those courses of action are not very obvious. Before 1.5 if
4662 a user committed a change that didn't touch the commit target, then
4663 immediately decided to revert that change via a reverse merge it would
4664 just DTRT. But with the advent of merge tracking the user gets a no-op.
4665
4666 So in the name of user friendliness, return an error suggesting a helpful
4667 course of action.
4668 */
4669 SVN_ERR(svn_wc__node_get_base(NULL, &child_base_revision,
4670 NULL, NULL, NULL, NULL,
4671 ctx->wc_ctx, child->abspath,
4672 TRUE /* ignore_enoent */,
4673 FALSE /* show_hidden */,
4674 scratch_pool, scratch_pool));
4675 /* If CHILD has no base revision then it hasn't been committed yet, so it
4676 can't have any "future" history. */
4677 if (SVN_IS_VALID_REVNUM(child_base_revision)
4678 && ((child->remaining_ranges)->nelts == 0) /* Inoperative merge */
4679 && (source->loc2->rev < source->loc1->rev) /* Reverse merge */
4680 && (child_base_revision <= source->loc2->rev)) /* From CHILD's future */
4681 {
4682 /* Hmmm, an inoperative reverse merge from the "future". If it is
4683 from our own future return a helpful error. */
4684 svn_error_t *err;
4685 svn_client__pathrev_t *start_loc;
4686
4687 err = svn_client__repos_location(&start_loc,
4688 ra_session,
4689 source->loc1,
4690 child_base_revision,
4691 ctx, scratch_pool, scratch_pool);
4692 if (err)
4693 {
4694 if (err->apr_err == SVN_ERR_FS_NOT_FOUND
4695 || err->apr_err == SVN_ERR_CLIENT_UNRELATED_RESOURCES)
4696 svn_error_clear(err);
4697 else
4698 return svn_error_trace(err);
4699 }
4700 else
4701 {
4702 const char *url;
4703
4704 SVN_ERR(svn_wc__node_get_url(&url, ctx->wc_ctx, child->abspath,
4705 scratch_pool, scratch_pool));
4706 if (strcmp(start_loc->url, url) == 0)
4707 return svn_error_create(SVN_ERR_CLIENT_MERGE_UPDATE_REQUIRED, NULL,
4708 _("Cannot reverse-merge a range from a "
4709 "path's own future history; try "
4710 "updating first"));
4711 }
4712 }
4713
4714 return SVN_NO_ERROR;
4715 }
4716
4717 /* Helper for populate_remaining_ranges().
4718
4719 SOURCE is cascaded from the arguments of the same name in
4720 populate_remaining_ranges().
4721
4722 Note: The following comments assume a forward merge, i.e.
4723 SOURCE->loc1->rev < SOURCE->loc2->rev. If this is a reverse merge then
4724 all the following comments still apply, but with SOURCE->loc1 switched
4725 with SOURCE->loc2.
4726
4727 Like populate_remaining_ranges(), SOURCE must adhere to the restrictions
4728 documented in 'MERGEINFO MERGE SOURCE NORMALIZATION'. These restrictions
4729 allow for a *single* gap in SOURCE, GAP_REV1:GAP_REV2 exclusive:inclusive
4730 (where SOURCE->loc1->rev == GAP_REV1 <= GAP_REV2 < SOURCE->loc2->rev),
4731 if SOURCE->loc2->url@(GAP_REV2+1) was copied from SOURCE->loc1. If such
4732 a gap exists, set *GAP_START and *GAP_END to the starting and ending
4733 revisions of the gap. Otherwise set both to SVN_INVALID_REVNUM.
4734
4735 For example, if the natural history of URL@2:URL@9 is 'trunk/:2,7-9' this
4736 would indicate that trunk@7 was copied from trunk@2. This function would
4737 return GAP_START:GAP_END of 2:6 in this case. Note that a path 'trunk'
4738 might exist at r3-6, but it would not be on the same line of history as
4739 trunk@9.
4740
4741 ### GAP_START is basically redundant, as (if there is a gap at all) it is
4742 necessarily the older revision of SOURCE.
4743
4744 RA_SESSION is an open RA session to the repository in which SOURCE lives.
4745 */
4746 static svn_error_t *
find_gaps_in_merge_source_history(svn_revnum_t * gap_start,svn_revnum_t * gap_end,const merge_source_t * source,svn_ra_session_t * ra_session,svn_client_ctx_t * ctx,apr_pool_t * scratch_pool)4747 find_gaps_in_merge_source_history(svn_revnum_t *gap_start,
4748 svn_revnum_t *gap_end,
4749 const merge_source_t *source,
4750 svn_ra_session_t *ra_session,
4751 svn_client_ctx_t *ctx,
4752 apr_pool_t *scratch_pool)
4753 {
4754 svn_mergeinfo_t implicit_src_mergeinfo;
4755 svn_revnum_t old_rev = MIN(source->loc1->rev, source->loc2->rev);
4756 const svn_client__pathrev_t *primary_src
4757 = (source->loc1->rev < source->loc2->rev) ? source->loc2 : source->loc1;
4758 const char *merge_src_fspath = svn_client__pathrev_fspath(primary_src,
4759 scratch_pool);
4760 svn_rangelist_t *rangelist;
4761
4762 SVN_ERR_ASSERT(source->ancestral);
4763
4764 /* Start by assuming there is no gap. */
4765 *gap_start = *gap_end = SVN_INVALID_REVNUM;
4766
4767 /* Easy out: There can't be a gap between adjacent revisions. */
4768 if (abs(source->loc1->rev - source->loc2->rev) == 1)
4769 return SVN_NO_ERROR;
4770
4771 /* Get SOURCE as mergeinfo. */
4772 SVN_ERR(svn_client__get_history_as_mergeinfo(&implicit_src_mergeinfo, NULL,
4773 primary_src,
4774 primary_src->rev, old_rev,
4775 ra_session,
4776 ctx, scratch_pool));
4777
4778 rangelist = svn_hash_gets(implicit_src_mergeinfo, merge_src_fspath);
4779
4780 if (!rangelist) /* ### Can we ever not find a rangelist? */
4781 return SVN_NO_ERROR;
4782
4783 /* A gap in natural history can result from either a copy or
4784 a rename. If from a copy then history as mergeinfo will look
4785 something like this:
4786
4787 '/trunk:X,Y-Z'
4788
4789 If from a rename it will look like this:
4790
4791 '/trunk_old_name:X'
4792 '/trunk_new_name:Y-Z'
4793
4794 In both cases the gap, if it exists, is M-N, where M = X + 1 and
4795 N = Y - 1.
4796
4797 Note that per the rules of 'MERGEINFO MERGE SOURCE NORMALIZATION' we
4798 should never have multiple gaps, e.g. if we see anything like the
4799 following then something is quite wrong:
4800
4801 '/trunk_old_name:A,B-C'
4802 '/trunk_new_name:D-E'
4803 */
4804
4805 if (rangelist->nelts > 1) /* Copy */
4806 {
4807 const svn_merge_range_t *gap;
4808 /* As mentioned above, multiple gaps *shouldn't* be possible. */
4809 SVN_ERR_ASSERT(apr_hash_count(implicit_src_mergeinfo) == 1);
4810
4811 gap = APR_ARRAY_IDX(rangelist, rangelist->nelts - 1,
4812 const svn_merge_range_t *);
4813
4814 *gap_start = MIN(source->loc1->rev, source->loc2->rev);
4815 *gap_end = gap->start;
4816
4817 /* ### Issue #4132:
4818 ### This assertion triggers in merge_tests.py svnmucc_abuse_1()
4819 ### when a node is replaced by an older copy of itself.
4820
4821 BH: I think we should review this and the 'rename' case to find
4822 out which behavior we really want, and if we can really
4823 determine what happened this way. */
4824 SVN_ERR_ASSERT(*gap_start < *gap_end);
4825 }
4826 else if (apr_hash_count(implicit_src_mergeinfo) > 1) /* Rename */
4827 {
4828 svn_rangelist_t *requested_rangelist =
4829 svn_rangelist__initialize(MIN(source->loc1->rev, source->loc2->rev),
4830 MAX(source->loc1->rev, source->loc2->rev),
4831 TRUE, scratch_pool);
4832 svn_rangelist_t *implicit_rangelist =
4833 apr_array_make(scratch_pool, 2, sizeof(svn_merge_range_t *));
4834 svn_rangelist_t *gap_rangelist;
4835
4836 SVN_ERR(svn_rangelist__merge_many(implicit_rangelist,
4837 implicit_src_mergeinfo,
4838 scratch_pool, scratch_pool));
4839 SVN_ERR(svn_rangelist_remove(&gap_rangelist, implicit_rangelist,
4840 requested_rangelist, FALSE,
4841 scratch_pool));
4842
4843 /* If there is anything left it is the gap. */
4844 if (gap_rangelist->nelts)
4845 {
4846 svn_merge_range_t *gap_range =
4847 APR_ARRAY_IDX(gap_rangelist, 0, svn_merge_range_t *);
4848
4849 *gap_start = gap_range->start;
4850 *gap_end = gap_range->end;
4851 }
4852 }
4853
4854 SVN_ERR_ASSERT(*gap_start == MIN(source->loc1->rev, source->loc2->rev)
4855 || (*gap_start == SVN_INVALID_REVNUM
4856 && *gap_end == SVN_INVALID_REVNUM));
4857 return SVN_NO_ERROR;
4858 }
4859
4860 /* Helper for do_directory_merge().
4861
4862 For each (svn_client__merge_path_t *) child in CHILDREN_WITH_MERGEINFO,
4863 populate that child's 'remaining_ranges' list with (### ... what?),
4864 and populate that child's 'implicit_mergeinfo' with its implicit
4865 mergeinfo (natural history). CHILDREN_WITH_MERGEINFO is expected
4866 to be sorted in depth first order and each child must be processed in
4867 that order. The inheritability of all calculated ranges is TRUE.
4868
4869 If mergeinfo is being honored (based on MERGE_B -- see HONOR_MERGEINFO()
4870 for how this is determined), this function will actually try to be
4871 intelligent about populating remaining_ranges list. Otherwise, it
4872 will claim that each child has a single remaining range, from
4873 SOURCE->rev1, to SOURCE->rev2.
4874 ### We also take the short-cut if doing record-only. Why?
4875
4876 SCRATCH_POOL is used for all temporary allocations. Changes to
4877 CHILDREN_WITH_MERGEINFO are made in RESULT_POOL.
4878
4879 Note that if SOURCE->rev1 > SOURCE->rev2, then each child's remaining_ranges
4880 member does not adhere to the API rules for rangelists described in
4881 svn_mergeinfo.h -- See svn_client__merge_path_t.
4882
4883 See `MERGEINFO MERGE SOURCE NORMALIZATION' for more requirements
4884 around SOURCE.
4885 */
4886 static svn_error_t *
populate_remaining_ranges(apr_array_header_t * children_with_mergeinfo,const merge_source_t * source,svn_ra_session_t * ra_session,merge_cmd_baton_t * merge_b,apr_pool_t * result_pool,apr_pool_t * scratch_pool)4887 populate_remaining_ranges(apr_array_header_t *children_with_mergeinfo,
4888 const merge_source_t *source,
4889 svn_ra_session_t *ra_session,
4890 merge_cmd_baton_t *merge_b,
4891 apr_pool_t *result_pool,
4892 apr_pool_t *scratch_pool)
4893 {
4894 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
4895 int i;
4896 svn_revnum_t gap_start, gap_end;
4897
4898 /* If we aren't honoring mergeinfo or this is a --record-only merge,
4899 we'll make quick work of this by simply adding dummy SOURCE->rev1:rev2
4900 ranges for all children. */
4901 if (! HONOR_MERGEINFO(merge_b) || merge_b->record_only)
4902 {
4903 for (i = 0; i < children_with_mergeinfo->nelts; i++)
4904 {
4905 svn_client__merge_path_t *child =
4906 APR_ARRAY_IDX(children_with_mergeinfo, i,
4907 svn_client__merge_path_t *);
4908
4909 svn_pool_clear(iterpool);
4910
4911 /* Issue #3646 'record-only merges create self-referential
4912 mergeinfo'. Get the merge target's implicit mergeinfo (natural
4913 history). We'll use it later to avoid setting self-referential
4914 mergeinfo -- see filter_natural_history_from_mergeinfo(). */
4915 if (i == 0) /* First item is always the merge target. */
4916 {
4917 SVN_ERR(get_full_mergeinfo(NULL, /* child->pre_merge_mergeinfo */
4918 &(child->implicit_mergeinfo),
4919 NULL, /* child->inherited_mergeinfo */
4920 svn_mergeinfo_inherited, ra_session,
4921 child->abspath,
4922 MAX(source->loc1->rev,
4923 source->loc2->rev),
4924 MIN(source->loc1->rev,
4925 source->loc2->rev),
4926 merge_b->ctx, result_pool,
4927 iterpool));
4928 }
4929 else
4930 {
4931 /* Issue #3443 - Subtrees of the merge target can inherit
4932 their parent's implicit mergeinfo in most cases. */
4933 svn_client__merge_path_t *parent
4934 = find_nearest_ancestor(children_with_mergeinfo,
4935 FALSE, child->abspath);
4936 svn_boolean_t child_inherits_implicit;
4937
4938 /* If CHILD is a subtree then its parent must be in
4939 CHILDREN_WITH_MERGEINFO, see the global comment
4940 'THE CHILDREN_WITH_MERGEINFO ARRAY'. */
4941 SVN_ERR_ASSERT(parent);
4942
4943 child_inherits_implicit = (parent && !child->switched);
4944 SVN_ERR(ensure_implicit_mergeinfo(parent, child,
4945 child_inherits_implicit,
4946 source->loc1->rev,
4947 source->loc2->rev,
4948 ra_session, merge_b->ctx,
4949 result_pool, iterpool));
4950 }
4951
4952 child->remaining_ranges = svn_rangelist__initialize(source->loc1->rev,
4953 source->loc2->rev,
4954 TRUE,
4955 result_pool);
4956 }
4957 svn_pool_destroy(iterpool);
4958 return SVN_NO_ERROR;
4959 }
4960
4961 /* If, in the merge source's history, there was a copy from an older
4962 revision, then SOURCE->loc2->url won't exist at some range M:N, where
4963 SOURCE->loc1->rev < M < N < SOURCE->loc2->rev. The rules of 'MERGEINFO
4964 MERGE SOURCE NORMALIZATION' allow this, but we must ignore these gaps
4965 when calculating what ranges remain to be merged from SOURCE. If we
4966 don't and try to merge any part of SOURCE->loc2->url@M:N we would
4967 break the editor since no part of that actually exists. See
4968 http://svn.haxx.se/dev/archive-2008-11/0618.shtml.
4969
4970 Find the gaps in the merge target's history, if any. Eventually
4971 we will adjust CHILD->REMAINING_RANGES such that we don't describe
4972 non-existent paths to the editor. */
4973 SVN_ERR(find_gaps_in_merge_source_history(&gap_start, &gap_end,
4974 source,
4975 ra_session, merge_b->ctx,
4976 iterpool));
4977
4978 /* Stash any gap in the merge command baton, we'll need it later when
4979 recording mergeinfo describing this merge. */
4980 if (SVN_IS_VALID_REVNUM(gap_start) && SVN_IS_VALID_REVNUM(gap_end))
4981 merge_b->implicit_src_gap = svn_rangelist__initialize(gap_start, gap_end,
4982 TRUE, result_pool);
4983
4984 for (i = 0; i < children_with_mergeinfo->nelts; i++)
4985 {
4986 svn_client__merge_path_t *child =
4987 APR_ARRAY_IDX(children_with_mergeinfo, i, svn_client__merge_path_t *);
4988 const char *child_repos_path
4989 = svn_dirent_skip_ancestor(merge_b->target->abspath, child->abspath);
4990 merge_source_t child_source;
4991 svn_client__merge_path_t *parent = NULL;
4992 svn_boolean_t child_inherits_implicit;
4993
4994 svn_pool_clear(iterpool);
4995
4996 /* If the path is absent don't do subtree merge either. */
4997 SVN_ERR_ASSERT(child);
4998 if (child->absent)
4999 continue;
5000
5001 SVN_ERR_ASSERT(child_repos_path != NULL);
5002 child_source.loc1 = svn_client__pathrev_join_relpath(
5003 source->loc1, child_repos_path, iterpool);
5004 child_source.loc2 = svn_client__pathrev_join_relpath(
5005 source->loc2, child_repos_path, iterpool);
5006 /* ### Is the child 'ancestral' over the same revision range? It's
5007 * not necessarily true that a child is 'ancestral' if the parent is,
5008 * nor that it's not if the parent is not. However, here we claim
5009 * that it is. Before we had this 'ancestral' field that we need to
5010 * set explicitly, the claim was implicit. Either way, the impact is
5011 * that we might pass calculate_remaining_ranges() a source that is
5012 * not in fact 'ancestral' (despite its 'ancestral' field being true),
5013 * contrary to its doc-string. */
5014 child_source.ancestral = source->ancestral;
5015
5016 /* Get the explicit/inherited mergeinfo for CHILD. If CHILD is the
5017 merge target then also get its implicit mergeinfo. Otherwise defer
5018 this until we know it is absolutely necessary, since it requires an
5019 expensive round trip communication with the server. */
5020 SVN_ERR(get_full_mergeinfo(
5021 child->pre_merge_mergeinfo ? NULL : &(child->pre_merge_mergeinfo),
5022 /* Get implicit only for merge target. */
5023 (i == 0) ? &(child->implicit_mergeinfo) : NULL,
5024 &(child->inherited_mergeinfo),
5025 svn_mergeinfo_inherited, ra_session,
5026 child->abspath,
5027 MAX(source->loc1->rev, source->loc2->rev),
5028 MIN(source->loc1->rev, source->loc2->rev),
5029 merge_b->ctx, result_pool, iterpool));
5030
5031 /* If CHILD isn't the merge target find its parent. */
5032 if (i > 0)
5033 {
5034 parent = find_nearest_ancestor(children_with_mergeinfo,
5035 FALSE, child->abspath);
5036 /* If CHILD is a subtree then its parent must be in
5037 CHILDREN_WITH_MERGEINFO, see the global comment
5038 'THE CHILDREN_WITH_MERGEINFO ARRAY'. */
5039 SVN_ERR_ASSERT(parent);
5040 }
5041
5042 /* Issue #3443 - Can CHILD inherit PARENT's implicit mergeinfo, saving
5043 us from having to ask the repos? The only time we can't do this is if
5044 CHILD is the merge target and so there is no PARENT to inherit from
5045 or if CHILD is the root of a switched subtree, in which case PARENT
5046 exists but is not CHILD's repository parent. */
5047 child_inherits_implicit = (parent && !child->switched);
5048
5049 SVN_ERR(calculate_remaining_ranges(parent, child,
5050 &child_source,
5051 child->pre_merge_mergeinfo,
5052 merge_b->implicit_src_gap,
5053 child_inherits_implicit,
5054 ra_session,
5055 merge_b->ctx, result_pool,
5056 iterpool));
5057
5058 /* Deal with any gap in SOURCE's natural history.
5059
5060 If the gap is a proper subset of CHILD->REMAINING_RANGES then we can
5061 safely ignore it since we won't describe this path/rev pair.
5062
5063 If the gap exactly matches or is a superset of a range in
5064 CHILD->REMAINING_RANGES then we must remove that range so we don't
5065 attempt to describe non-existent paths via the reporter, this will
5066 break the editor and our merge.
5067
5068 If the gap adjoins or overlaps a range in CHILD->REMAINING_RANGES
5069 then we must *add* the gap so we span the missing revisions. */
5070 if (child->remaining_ranges->nelts
5071 && merge_b->implicit_src_gap)
5072 {
5073 int j;
5074 svn_boolean_t proper_subset = FALSE;
5075 svn_boolean_t overlaps_or_adjoins = FALSE;
5076
5077 /* If this is a reverse merge reorder CHILD->REMAINING_RANGES
5078 so it will work with the svn_rangelist_* APIs below. */
5079 if (source->loc1->rev > source->loc2->rev)
5080 SVN_ERR(svn_rangelist_reverse(child->remaining_ranges, iterpool));
5081
5082 for (j = 0; j < child->remaining_ranges->nelts; j++)
5083 {
5084 svn_merge_range_t *range
5085 = APR_ARRAY_IDX(child->remaining_ranges, j, svn_merge_range_t *);
5086
5087 if ((range->start <= gap_start && gap_end < range->end)
5088 || (range->start < gap_start && gap_end <= range->end))
5089 {
5090 proper_subset = TRUE;
5091 break;
5092 }
5093 else if ((gap_start == range->start) && (range->end == gap_end))
5094 {
5095 break;
5096 }
5097 else if (gap_start <= range->end && range->start <= gap_end)
5098 /* intersect */
5099 {
5100 overlaps_or_adjoins = TRUE;
5101 break;
5102 }
5103 }
5104
5105 if (!proper_subset)
5106 {
5107 /* We need to make adjustments. Remove from, or add the gap
5108 to, CHILD->REMAINING_RANGES as appropriate. */
5109
5110 if (overlaps_or_adjoins)
5111 SVN_ERR(svn_rangelist_merge2(child->remaining_ranges,
5112 merge_b->implicit_src_gap,
5113 result_pool, iterpool));
5114 else /* equals == TRUE */
5115 SVN_ERR(svn_rangelist_remove(&(child->remaining_ranges),
5116 merge_b->implicit_src_gap,
5117 child->remaining_ranges, FALSE,
5118 result_pool));
5119 }
5120
5121 if (source->loc1->rev > source->loc2->rev) /* Reverse merge */
5122 SVN_ERR(svn_rangelist_reverse(child->remaining_ranges, iterpool));
5123 }
5124 }
5125
5126 svn_pool_destroy(iterpool);
5127 return SVN_NO_ERROR;
5128 }
5129
5130
5131 /*-----------------------------------------------------------------------*/
5132
5133 /*** Other Helper Functions ***/
5134
5135 /* Calculate the new mergeinfo for the target tree rooted at TARGET_ABSPATH
5136 based on MERGES (a mapping of absolute WC paths to rangelists representing
5137 a merge from the source SOURCE_FSPATH).
5138
5139 If RESULT_CATALOG is NULL, then record the new mergeinfo in the WC (at,
5140 and possibly below, TARGET_ABSPATH).
5141
5142 If RESULT_CATALOG is not NULL, then don't record the new mergeinfo on the
5143 WC, but instead record it in RESULT_CATALOG, where the keys are absolute
5144 working copy paths and the values are the new mergeinfos for each.
5145 Allocate additions to RESULT_CATALOG in pool which RESULT_CATALOG was
5146 created in. */
5147 static svn_error_t *
update_wc_mergeinfo(svn_mergeinfo_catalog_t result_catalog,const char * target_abspath,const char * source_fspath,apr_hash_t * merges,svn_boolean_t is_rollback,svn_client_ctx_t * ctx,apr_pool_t * scratch_pool)5148 update_wc_mergeinfo(svn_mergeinfo_catalog_t result_catalog,
5149 const char *target_abspath,
5150 const char *source_fspath,
5151 apr_hash_t *merges,
5152 svn_boolean_t is_rollback,
5153 svn_client_ctx_t *ctx,
5154 apr_pool_t *scratch_pool)
5155 {
5156 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
5157 apr_hash_index_t *hi;
5158
5159 /* Combine the mergeinfo for the revision range just merged into
5160 the WC with its on-disk mergeinfo. */
5161 for (hi = apr_hash_first(scratch_pool, merges); hi; hi = apr_hash_next(hi))
5162 {
5163 const char *local_abspath = svn__apr_hash_index_key(hi);
5164 svn_rangelist_t *ranges = svn__apr_hash_index_val(hi);
5165 svn_rangelist_t *rangelist;
5166 svn_error_t *err;
5167 const char *local_abspath_rel_to_target;
5168 const char *fspath;
5169 svn_mergeinfo_t mergeinfo;
5170
5171 svn_pool_clear(iterpool);
5172
5173 /* As some of the merges may've changed the WC's mergeinfo, get
5174 a fresh copy before using it to update the WC's mergeinfo. */
5175 err = svn_client__parse_mergeinfo(&mergeinfo, ctx->wc_ctx,
5176 local_abspath, iterpool, iterpool);
5177
5178 /* If a directory PATH was skipped because it is missing or was
5179 obstructed by an unversioned item then there's nothing we can
5180 do with that, so skip it. */
5181 if (err)
5182 {
5183 if (err->apr_err == SVN_ERR_WC_NOT_LOCKED
5184 || err->apr_err == SVN_ERR_WC_PATH_NOT_FOUND)
5185 {
5186 svn_error_clear(err);
5187 continue;
5188 }
5189 else
5190 {
5191 return svn_error_trace(err);
5192 }
5193 }
5194
5195 /* If we are attempting to set empty revision range override mergeinfo
5196 on a path with no explicit mergeinfo, we first need the
5197 mergeinfo that path inherits. */
5198 if (mergeinfo == NULL && ranges->nelts == 0)
5199 {
5200 SVN_ERR(svn_client__get_wc_mergeinfo(&mergeinfo, NULL,
5201 svn_mergeinfo_nearest_ancestor,
5202 local_abspath, NULL, NULL,
5203 FALSE, ctx, iterpool, iterpool));
5204 }
5205
5206 if (mergeinfo == NULL)
5207 mergeinfo = apr_hash_make(iterpool);
5208
5209 local_abspath_rel_to_target = svn_dirent_skip_ancestor(target_abspath,
5210 local_abspath);
5211 SVN_ERR_ASSERT(local_abspath_rel_to_target != NULL);
5212 fspath = svn_fspath__join(source_fspath,
5213 local_abspath_rel_to_target,
5214 iterpool);
5215 rangelist = svn_hash_gets(mergeinfo, fspath);
5216 if (rangelist == NULL)
5217 rangelist = apr_array_make(iterpool, 0, sizeof(svn_merge_range_t *));
5218
5219 if (is_rollback)
5220 {
5221 ranges = svn_rangelist_dup(ranges, iterpool);
5222 SVN_ERR(svn_rangelist_reverse(ranges, iterpool));
5223 SVN_ERR(svn_rangelist_remove(&rangelist, ranges, rangelist,
5224 FALSE,
5225 iterpool));
5226 }
5227 else
5228 {
5229 SVN_ERR(svn_rangelist_merge2(rangelist, ranges, iterpool, iterpool));
5230 }
5231 /* Update the mergeinfo by adjusting the path's rangelist. */
5232 svn_hash_sets(mergeinfo, fspath, rangelist);
5233
5234 if (is_rollback && apr_hash_count(mergeinfo) == 0)
5235 mergeinfo = NULL;
5236
5237 svn_mergeinfo__remove_empty_rangelists(mergeinfo, scratch_pool);
5238
5239 if (result_catalog)
5240 {
5241 svn_mergeinfo_t existing_mergeinfo =
5242 svn_hash_gets(result_catalog, local_abspath);
5243 apr_pool_t *result_catalog_pool = apr_hash_pool_get(result_catalog);
5244
5245 if (existing_mergeinfo)
5246 SVN_ERR(svn_mergeinfo_merge2(mergeinfo, existing_mergeinfo,
5247 result_catalog_pool, scratch_pool));
5248 svn_hash_sets(result_catalog,
5249 apr_pstrdup(result_catalog_pool, local_abspath),
5250 svn_mergeinfo_dup(mergeinfo, result_catalog_pool));
5251 }
5252 else
5253 {
5254 err = svn_client__record_wc_mergeinfo(local_abspath, mergeinfo,
5255 TRUE, ctx, iterpool);
5256
5257 if (err && err->apr_err == SVN_ERR_ENTRY_NOT_FOUND)
5258 {
5259 /* PATH isn't just missing, it's not even versioned as far
5260 as this working copy knows. But it was included in
5261 MERGES, which means that the server knows about it.
5262 Likely we don't have access to the source due to authz
5263 restrictions. For now just clear the error and
5264 continue...
5265
5266 ### TODO: Set non-inheritable mergeinfo on PATH's immediate
5267 ### parent and normal mergeinfo on PATH's siblings which we
5268 ### do have access to. */
5269 svn_error_clear(err);
5270 }
5271 else
5272 SVN_ERR(err);
5273 }
5274 }
5275
5276 svn_pool_destroy(iterpool);
5277 return SVN_NO_ERROR;
5278 }
5279
5280 /* Helper for record_mergeinfo_for_dir_merge().
5281
5282 Record override mergeinfo on any paths skipped during a merge.
5283
5284 Set empty mergeinfo on each path in MERGE_B->SKIPPED_ABSPATHS so the path
5285 does not incorrectly inherit mergeinfo that will later be describing
5286 the merge.
5287
5288 MERGEINFO_PATH and MERGE_B are cascaded from
5289 arguments of the same name in the caller.
5290
5291 IS_ROLLBACK is true if the caller is recording a reverse merge and false
5292 otherwise. RANGELIST is the set of revisions being merged from
5293 MERGEINFO_PATH to MERGE_B->target. */
5294 static svn_error_t *
record_skips_in_mergeinfo(const char * mergeinfo_path,const svn_rangelist_t * rangelist,svn_boolean_t is_rollback,merge_cmd_baton_t * merge_b,apr_pool_t * scratch_pool)5295 record_skips_in_mergeinfo(const char *mergeinfo_path,
5296 const svn_rangelist_t *rangelist,
5297 svn_boolean_t is_rollback,
5298 merge_cmd_baton_t *merge_b,
5299 apr_pool_t *scratch_pool)
5300 {
5301 apr_hash_index_t *hi;
5302 apr_hash_t *merges;
5303 apr_size_t nbr_skips = apr_hash_count(merge_b->skipped_abspaths);
5304 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
5305
5306 if (nbr_skips == 0)
5307 return SVN_NO_ERROR;
5308
5309 merges = apr_hash_make(scratch_pool);
5310
5311 /* Override the mergeinfo for child paths which weren't actually merged. */
5312 for (hi = apr_hash_first(scratch_pool, merge_b->skipped_abspaths); hi;
5313 hi = apr_hash_next(hi))
5314 {
5315 const char *skipped_abspath = svn__apr_hash_index_key(hi);
5316 svn_wc_notify_state_t obstruction_state;
5317
5318 svn_pool_clear(iterpool);
5319
5320 /* Before we override, make sure this is a versioned path, it might
5321 be an external or missing from disk due to authz restrictions. */
5322 SVN_ERR(perform_obstruction_check(&obstruction_state, NULL, NULL,
5323 NULL, NULL,
5324 merge_b, skipped_abspath,
5325 iterpool));
5326 if (obstruction_state == svn_wc_notify_state_obstructed
5327 || obstruction_state == svn_wc_notify_state_missing)
5328 continue;
5329
5330 /* Add an empty range list for this path.
5331
5332 ### TODO: This works fine for a file path skipped because it is
5333 ### missing as long as the file's parent directory is present.
5334 ### But missing directory paths skipped are not handled yet,
5335 ### see issue #2915.
5336
5337 ### TODO: An empty range is fine if the skipped path doesn't
5338 ### inherit any mergeinfo from a parent, but if it does
5339 ### we need to account for that. See issue #3440
5340 ### http://subversion.tigris.org/issues/show_bug.cgi?id=3440. */
5341 svn_hash_sets(merges, skipped_abspath,
5342 apr_array_make(scratch_pool, 0,
5343 sizeof(svn_merge_range_t *)));
5344
5345 /* if (nbr_skips < notify_b->nbr_notifications)
5346 ### Use RANGELIST as the mergeinfo for all children of
5347 ### this path which were not also explicitly
5348 ### skipped? */
5349 }
5350 SVN_ERR(update_wc_mergeinfo(NULL, merge_b->target->abspath,
5351 mergeinfo_path, merges,
5352 is_rollback, merge_b->ctx, iterpool));
5353 svn_pool_destroy(iterpool);
5354 return SVN_NO_ERROR;
5355 }
5356
5357 /* Data for reporting when a merge aborted because of raising conflicts.
5358 */
5359 typedef struct single_range_conflict_report_t
5360 {
5361 /* What sub-range of the requested source raised conflicts?
5362 * The 'inheritable' flag is ignored. */
5363 merge_source_t *conflicted_range;
5364 /* What sub-range of the requested source remains to be merged?
5365 * NULL if no more. The 'inheritable' flag is ignored. */
5366 merge_source_t *remaining_source;
5367
5368 } single_range_conflict_report_t;
5369
5370 /* Create a single_range_conflict_report_t, containing deep copies of
5371 * CONFLICTED_RANGE and REMAINING_SOURCE, allocated in RESULT_POOL. */
5372 static single_range_conflict_report_t *
single_range_conflict_report_create(const merge_source_t * conflicted_range,const merge_source_t * remaining_source,apr_pool_t * result_pool)5373 single_range_conflict_report_create(const merge_source_t *conflicted_range,
5374 const merge_source_t *remaining_source,
5375 apr_pool_t *result_pool)
5376 {
5377 single_range_conflict_report_t *report
5378 = apr_palloc(result_pool, sizeof(*report));
5379
5380 assert(conflicted_range != NULL);
5381
5382 report->conflicted_range = merge_source_dup(conflicted_range, result_pool);
5383 report->remaining_source
5384 = remaining_source ? merge_source_dup(remaining_source, result_pool)
5385 : NULL;
5386 return report;
5387 }
5388
5389 /* Data for reporting when a merge aborted because of raising conflicts.
5390 *
5391 * ### TODO: More info, including the ranges (or other parameters) the user
5392 * needs to complete the merge.
5393 */
5394 typedef struct conflict_report_t
5395 {
5396 const char *target_abspath;
5397 /* The revision range during which conflicts were raised */
5398 const merge_source_t *conflicted_range;
5399 /* Was the conflicted range the last range in the whole requested merge? */
5400 svn_boolean_t was_last_range;
5401 } conflict_report_t;
5402
5403 /* Return a new conflict_report_t containing deep copies of the parameters,
5404 * allocated in RESULT_POOL. */
5405 static conflict_report_t *
conflict_report_create(const char * target_abspath,const merge_source_t * conflicted_range,svn_boolean_t was_last_range,apr_pool_t * result_pool)5406 conflict_report_create(const char *target_abspath,
5407 const merge_source_t *conflicted_range,
5408 svn_boolean_t was_last_range,
5409 apr_pool_t *result_pool)
5410 {
5411 conflict_report_t *report = apr_palloc(result_pool, sizeof(*report));
5412
5413 report->target_abspath = apr_pstrdup(result_pool, target_abspath);
5414 report->conflicted_range = merge_source_dup(conflicted_range, result_pool);
5415 report->was_last_range = was_last_range;
5416 return report;
5417 }
5418
5419 /* Return a deep copy of REPORT, allocated in RESULT_POOL. */
5420 static conflict_report_t *
conflict_report_dup(const conflict_report_t * report,apr_pool_t * result_pool)5421 conflict_report_dup(const conflict_report_t *report,
5422 apr_pool_t *result_pool)
5423 {
5424 conflict_report_t *new = apr_pmemdup(result_pool, report, sizeof(*new));
5425
5426 new->target_abspath = apr_pstrdup(result_pool, report->target_abspath);
5427 new->conflicted_range = merge_source_dup(report->conflicted_range,
5428 result_pool);
5429 return new;
5430 }
5431
5432 /* Create and return an error structure appropriate for the unmerged
5433 revisions range(s). */
5434 static APR_INLINE svn_error_t *
make_merge_conflict_error(conflict_report_t * report,apr_pool_t * scratch_pool)5435 make_merge_conflict_error(conflict_report_t *report,
5436 apr_pool_t *scratch_pool)
5437 {
5438 assert(!report || svn_dirent_is_absolute(report->target_abspath));
5439
5440 if (report && ! report->was_last_range)
5441 {
5442 svn_error_t *err = svn_error_createf(SVN_ERR_WC_FOUND_CONFLICT, NULL,
5443 _("One or more conflicts were produced while merging r%ld:%ld into\n"
5444 "'%s' --\n"
5445 "resolve all conflicts and rerun the merge to apply the remaining\n"
5446 "unmerged revisions"),
5447 report->conflicted_range->loc1->rev, report->conflicted_range->loc2->rev,
5448 svn_dirent_local_style(report->target_abspath, scratch_pool));
5449 assert(report->conflicted_range->loc1->rev != report->conflicted_range->loc2->rev); /* ### is a valid case in a 2-URL merge */
5450 return err;
5451 }
5452 return SVN_NO_ERROR;
5453 }
5454
5455 /* Helper for do_directory_merge().
5456
5457 TARGET_WCPATH is a directory and CHILDREN_WITH_MERGEINFO is filled
5458 with paths (svn_client__merge_path_t *) arranged in depth first order,
5459 which have mergeinfo set on them or meet one of the other criteria
5460 defined in get_mergeinfo_paths(). Remove any paths absent from disk
5461 or scheduled for deletion from CHILDREN_WITH_MERGEINFO which are equal to
5462 or are descendants of TARGET_WCPATH by setting those children to NULL. */
5463 static void
remove_absent_children(const char * target_wcpath,apr_array_header_t * children_with_mergeinfo)5464 remove_absent_children(const char *target_wcpath,
5465 apr_array_header_t *children_with_mergeinfo)
5466 {
5467 /* Before we try to override mergeinfo for skipped paths, make sure
5468 the path isn't absent due to authz restrictions, because there's
5469 nothing we can do about those. */
5470 int i;
5471 for (i = 0; i < children_with_mergeinfo->nelts; i++)
5472 {
5473 svn_client__merge_path_t *child =
5474 APR_ARRAY_IDX(children_with_mergeinfo, i, svn_client__merge_path_t *);
5475 if ((child->absent || child->scheduled_for_deletion)
5476 && svn_dirent_is_ancestor(target_wcpath, child->abspath))
5477 {
5478 svn_sort__array_delete(children_with_mergeinfo, i--, 1);
5479 }
5480 }
5481 }
5482
5483 /* Helper for do_directory_merge() to handle the case where a merge editor
5484 drive removes explicit mergeinfo from a subtree of the merge target.
5485
5486 MERGE_B is cascaded from the argument of the same name in
5487 do_directory_merge(). For each path (if any) in
5488 MERGE_B->PATHS_WITH_DELETED_MERGEINFO remove that path from
5489 CHILDREN_WITH_MERGEINFO.
5490
5491 The one exception is for the merge target itself,
5492 MERGE_B->target->abspath, this must always be present in
5493 CHILDREN_WITH_MERGEINFO so this is never removed by this
5494 function. */
5495 static void
remove_children_with_deleted_mergeinfo(merge_cmd_baton_t * merge_b,apr_array_header_t * children_with_mergeinfo)5496 remove_children_with_deleted_mergeinfo(merge_cmd_baton_t *merge_b,
5497 apr_array_header_t *children_with_mergeinfo)
5498 {
5499 int i;
5500
5501 if (!merge_b->paths_with_deleted_mergeinfo)
5502 return;
5503
5504 /* CHILDREN_WITH_MERGEINFO[0] is the always the merge target
5505 so start at the first child. */
5506 for (i = 1; i < children_with_mergeinfo->nelts; i++)
5507 {
5508 svn_client__merge_path_t *child =
5509 APR_ARRAY_IDX(children_with_mergeinfo, i, svn_client__merge_path_t *);
5510
5511 if (svn_hash_gets(merge_b->paths_with_deleted_mergeinfo, child->abspath))
5512 {
5513 svn_sort__array_delete(children_with_mergeinfo, i--, 1);
5514 }
5515 }
5516 }
5517
5518 /* Helper for do_directory_merge().
5519
5520 Set up the diff editor report to merge the SOURCE diff
5521 into TARGET_ABSPATH and drive it.
5522
5523 If mergeinfo is not being honored (based on MERGE_B -- see the doc
5524 string for HONOR_MERGEINFO() for how this is determined), then ignore
5525 CHILDREN_WITH_MERGEINFO and merge the SOURCE diff to TARGET_ABSPATH.
5526
5527 If mergeinfo is being honored then perform a history-aware merge,
5528 describing TARGET_ABSPATH and its subtrees to the reporter in such as way
5529 as to avoid repeating merges already performed per the mergeinfo and
5530 natural history of TARGET_ABSPATH and its subtrees.
5531
5532 The ranges that still need to be merged to the TARGET_ABSPATH and its
5533 subtrees are described in CHILDREN_WITH_MERGEINFO, an array of
5534 svn_client__merge_path_t * -- see 'THE CHILDREN_WITH_MERGEINFO ARRAY'
5535 comment at the top of this file for more info. Note that it is possible
5536 TARGET_ABSPATH and/or some of its subtrees need only a subset, or no part,
5537 of SOURCE to be merged. Though there is little point to
5538 calling this function if TARGET_ABSPATH and all its subtrees have already
5539 had SOURCE merged, this will work but is a no-op.
5540
5541 SOURCE->rev1 and SOURCE->rev2 must be bound by the set of remaining_ranges
5542 fields in CHILDREN_WITH_MERGEINFO's elements, specifically:
5543
5544 For forward merges (SOURCE->rev1 < SOURCE->rev2):
5545
5546 1) The first svn_merge_range_t * element of each child's remaining_ranges
5547 array must meet one of the following conditions:
5548
5549 a) The range's start field is greater than or equal to SOURCE->rev2.
5550
5551 b) The range's end field is SOURCE->rev2.
5552
5553 2) Among all the ranges that meet condition 'b' the oldest start
5554 revision must equal SOURCE->rev1.
5555
5556 For reverse merges (SOURCE->rev1 > SOURCE->rev2):
5557
5558 1) The first svn_merge_range_t * element of each child's remaining_ranges
5559 array must meet one of the following conditions:
5560
5561 a) The range's start field is less than or equal to SOURCE->rev2.
5562
5563 b) The range's end field is SOURCE->rev2.
5564
5565 2) Among all the ranges that meet condition 'b' the youngest start
5566 revision must equal SOURCE->rev1.
5567
5568 Note: If the first svn_merge_range_t * element of some subtree child's
5569 remaining_ranges array is the same as the first range of that child's
5570 nearest path-wise ancestor, then the subtree child *will not* be described
5571 to the reporter.
5572
5573 DEPTH, NOTIFY_B, and MERGE_B are cascaded from do_directory_merge(), see
5574 that function for more info.
5575
5576 MERGE_B->ra_session1 and MERGE_B->ra_session2 are RA sessions open to any
5577 URL in the repository of SOURCE; they may be temporarily reparented within
5578 this function.
5579
5580 If SOURCE->ancestral is set, then SOURCE->loc1 must be a
5581 historical ancestor of SOURCE->loc2, or vice-versa (see
5582 `MERGEINFO MERGE SOURCE NORMALIZATION' for more requirements around
5583 SOURCE in this case).
5584 */
5585 static svn_error_t *
drive_merge_report_editor(const char * target_abspath,const merge_source_t * source,const apr_array_header_t * children_with_mergeinfo,const svn_diff_tree_processor_t * processor,svn_depth_t depth,merge_cmd_baton_t * merge_b,apr_pool_t * scratch_pool)5586 drive_merge_report_editor(const char *target_abspath,
5587 const merge_source_t *source,
5588 const apr_array_header_t *children_with_mergeinfo,
5589 const svn_diff_tree_processor_t *processor,
5590 svn_depth_t depth,
5591 merge_cmd_baton_t *merge_b,
5592 apr_pool_t *scratch_pool)
5593 {
5594 const svn_ra_reporter3_t *reporter;
5595 const svn_delta_editor_t *diff_editor;
5596 void *diff_edit_baton;
5597 void *report_baton;
5598 svn_revnum_t target_start;
5599 svn_boolean_t honor_mergeinfo = HONOR_MERGEINFO(merge_b);
5600 const char *old_sess1_url, *old_sess2_url;
5601 svn_boolean_t is_rollback = source->loc1->rev > source->loc2->rev;
5602
5603 /* Start with a safe default starting revision for the editor and the
5604 merge target. */
5605 target_start = source->loc1->rev;
5606
5607 /* If we are honoring mergeinfo the starting revision for the merge target
5608 might not be SOURCE->rev1, in fact the merge target might not need *any*
5609 part of SOURCE merged -- Instead some subtree of the target
5610 needs SOURCE -- So get the right starting revision for the
5611 target. */
5612 if (honor_mergeinfo)
5613 {
5614 svn_client__merge_path_t *child;
5615
5616 /* CHILDREN_WITH_MERGEINFO must always exist if we are honoring
5617 mergeinfo and must have at least one element (describing the
5618 merge target). */
5619 SVN_ERR_ASSERT(children_with_mergeinfo);
5620 SVN_ERR_ASSERT(children_with_mergeinfo->nelts);
5621
5622 /* Get the merge target's svn_client__merge_path_t, which is always
5623 the first in the array due to depth first sorting requirement,
5624 see 'THE CHILDREN_WITH_MERGEINFO ARRAY'. */
5625 child = APR_ARRAY_IDX(children_with_mergeinfo, 0,
5626 svn_client__merge_path_t *);
5627 SVN_ERR_ASSERT(child);
5628 if (child->remaining_ranges->nelts == 0)
5629 {
5630 /* The merge target doesn't need anything merged. */
5631 target_start = source->loc2->rev;
5632 }
5633 else
5634 {
5635 /* The merge target has remaining revisions to merge. These
5636 ranges may fully or partially overlap the range described
5637 by SOURCE->rev1:rev2 or may not intersect that range at
5638 all. */
5639 svn_merge_range_t *range =
5640 APR_ARRAY_IDX(child->remaining_ranges, 0,
5641 svn_merge_range_t *);
5642 if ((!is_rollback && range->start > source->loc2->rev)
5643 || (is_rollback && range->start < source->loc2->rev))
5644 {
5645 /* Merge target's first remaining range doesn't intersect. */
5646 target_start = source->loc2->rev;
5647 }
5648 else
5649 {
5650 /* Merge target's first remaining range partially or
5651 fully overlaps. */
5652 target_start = range->start;
5653 }
5654 }
5655 }
5656
5657 SVN_ERR(svn_client__ensure_ra_session_url(&old_sess1_url,
5658 merge_b->ra_session1,
5659 source->loc1->url, scratch_pool));
5660 /* Temporarily point our second RA session to SOURCE->loc1->url, too. We use
5661 this to request individual file contents. */
5662 SVN_ERR(svn_client__ensure_ra_session_url(&old_sess2_url,
5663 merge_b->ra_session2,
5664 source->loc1->url, scratch_pool));
5665
5666 /* Get the diff editor and a reporter with which to, ultimately,
5667 drive it. */
5668 SVN_ERR(svn_client__get_diff_editor2(&diff_editor, &diff_edit_baton,
5669 merge_b->ra_session2,
5670 depth,
5671 source->loc1->rev,
5672 TRUE /* text_deltas */,
5673 processor,
5674 merge_b->ctx->cancel_func,
5675 merge_b->ctx->cancel_baton,
5676 scratch_pool));
5677 SVN_ERR(svn_ra_do_diff3(merge_b->ra_session1,
5678 &reporter, &report_baton, source->loc2->rev,
5679 "", depth, merge_b->diff_ignore_ancestry,
5680 TRUE, /* text_deltas */
5681 source->loc2->url, diff_editor, diff_edit_baton,
5682 scratch_pool));
5683
5684 /* Drive the reporter. */
5685 SVN_ERR(reporter->set_path(report_baton, "", target_start, depth,
5686 FALSE, NULL, scratch_pool));
5687 if (honor_mergeinfo && children_with_mergeinfo)
5688 {
5689 /* Describe children with mergeinfo overlapping this merge
5690 operation such that no repeated diff is retrieved for them from
5691 the repository. */
5692 int i;
5693 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
5694
5695 /* Start with CHILDREN_WITH_MERGEINFO[1], CHILDREN_WITH_MERGEINFO[0]
5696 is always the merge target (TARGET_ABSPATH). */
5697 for (i = 1; i < children_with_mergeinfo->nelts; i++)
5698 {
5699 svn_merge_range_t *range;
5700 const char *child_repos_path;
5701 const svn_client__merge_path_t *parent;
5702 const svn_client__merge_path_t *child =
5703 APR_ARRAY_IDX(children_with_mergeinfo, i,
5704 svn_client__merge_path_t *);
5705
5706 SVN_ERR_ASSERT(child);
5707 if (child->absent)
5708 continue;
5709
5710 svn_pool_clear(iterpool);
5711
5712 /* Find this child's nearest wc ancestor with mergeinfo. */
5713 parent = find_nearest_ancestor(children_with_mergeinfo,
5714 FALSE, child->abspath);
5715
5716 /* If a subtree needs the same range applied as its nearest parent
5717 with mergeinfo or neither the subtree nor this parent need
5718 SOURCE->rev1:rev2 merged, then we don't need to describe the
5719 subtree separately. In the latter case this could break the
5720 editor if child->abspath didn't exist at SOURCE->rev2 and we
5721 attempt to describe it via a reporter set_path call. */
5722 if (child->remaining_ranges->nelts)
5723 {
5724 range = APR_ARRAY_IDX(child->remaining_ranges, 0,
5725 svn_merge_range_t *);
5726 if ((!is_rollback && range->start > source->loc2->rev)
5727 || (is_rollback && range->start < source->loc2->rev))
5728 {
5729 /* This child's first remaining range comes after the range
5730 we are currently merging, so skip it. We expect to get
5731 to it in a subsequent call to this function. */
5732 continue;
5733 }
5734 else if (parent->remaining_ranges->nelts)
5735 {
5736 svn_merge_range_t *parent_range =
5737 APR_ARRAY_IDX(parent->remaining_ranges, 0,
5738 svn_merge_range_t *);
5739 svn_merge_range_t *child_range =
5740 APR_ARRAY_IDX(child->remaining_ranges, 0,
5741 svn_merge_range_t *);
5742 if (parent_range->start == child_range->start)
5743 continue; /* Subtree needs same range as parent. */
5744 }
5745 }
5746 else /* child->remaining_ranges->nelts == 0*/
5747 {
5748 /* If both the subtree and its parent need no ranges applied
5749 consider that as the "same ranges" and don't describe
5750 the subtree. */
5751 if (parent->remaining_ranges->nelts == 0)
5752 continue;
5753 }
5754
5755 /* Ok, we really need to describe this subtree as it needs different
5756 ranges applied than its nearest working copy parent. */
5757 child_repos_path = svn_dirent_is_child(target_abspath,
5758 child->abspath,
5759 iterpool);
5760 /* This loop is only processing subtrees, so CHILD->ABSPATH
5761 better be a proper child of the merge target. */
5762 SVN_ERR_ASSERT(child_repos_path);
5763
5764 if ((child->remaining_ranges->nelts == 0)
5765 || (is_rollback && (range->start < source->loc2->rev))
5766 || (!is_rollback && (range->start > source->loc2->rev)))
5767 {
5768 /* Nothing to merge to this child. We'll claim we have
5769 it up to date so the server doesn't send us
5770 anything. */
5771 SVN_ERR(reporter->set_path(report_baton, child_repos_path,
5772 source->loc2->rev, depth, FALSE,
5773 NULL, iterpool));
5774 }
5775 else
5776 {
5777 SVN_ERR(reporter->set_path(report_baton, child_repos_path,
5778 range->start, depth, FALSE,
5779 NULL, iterpool));
5780 }
5781 }
5782 svn_pool_destroy(iterpool);
5783 }
5784 SVN_ERR(reporter->finish_report(report_baton, scratch_pool));
5785
5786 /* Point the merge baton's RA sessions back where they were. */
5787 SVN_ERR(svn_ra_reparent(merge_b->ra_session1, old_sess1_url, scratch_pool));
5788 SVN_ERR(svn_ra_reparent(merge_b->ra_session2, old_sess2_url, scratch_pool));
5789
5790 return SVN_NO_ERROR;
5791 }
5792
5793 /* Iterate over each svn_client__merge_path_t * element in
5794 CHILDREN_WITH_MERGEINFO and, if START_REV is true, find the most inclusive
5795 start revision among those element's first remaining_ranges element. If
5796 START_REV is false, then look for the most inclusive end revision.
5797
5798 If IS_ROLLBACK is true the youngest start or end (as per START_REV)
5799 revision is considered the "most inclusive" otherwise the oldest revision
5800 is.
5801
5802 If none of CHILDREN_WITH_MERGEINFO's elements have any remaining ranges
5803 return SVN_INVALID_REVNUM. */
5804 static svn_revnum_t
get_most_inclusive_rev(const apr_array_header_t * children_with_mergeinfo,svn_boolean_t is_rollback,svn_boolean_t start_rev)5805 get_most_inclusive_rev(const apr_array_header_t *children_with_mergeinfo,
5806 svn_boolean_t is_rollback,
5807 svn_boolean_t start_rev)
5808 {
5809 int i;
5810 svn_revnum_t most_inclusive_rev = SVN_INVALID_REVNUM;
5811
5812 for (i = 0; i < children_with_mergeinfo->nelts; i++)
5813 {
5814 svn_client__merge_path_t *child =
5815 APR_ARRAY_IDX(children_with_mergeinfo, i, svn_client__merge_path_t *);
5816
5817 if ((! child) || child->absent)
5818 continue;
5819 if (child->remaining_ranges->nelts > 0)
5820 {
5821 svn_merge_range_t *range =
5822 APR_ARRAY_IDX(child->remaining_ranges, 0, svn_merge_range_t *);
5823
5824 /* Are we looking for the most inclusive start or end rev? */
5825 svn_revnum_t rev = start_rev ? range->start : range->end;
5826
5827 if ((most_inclusive_rev == SVN_INVALID_REVNUM)
5828 || (is_rollback && (rev > most_inclusive_rev))
5829 || ((! is_rollback) && (rev < most_inclusive_rev)))
5830 most_inclusive_rev = rev;
5831 }
5832 }
5833 return most_inclusive_rev;
5834 }
5835
5836
5837 /* If first item in each child of CHILDREN_WITH_MERGEINFO's
5838 remaining_ranges is inclusive of END_REV, Slice the first range in
5839 to two at END_REV. All the allocations are persistent and allocated
5840 from POOL. */
5841 static void
slice_remaining_ranges(apr_array_header_t * children_with_mergeinfo,svn_boolean_t is_rollback,svn_revnum_t end_rev,apr_pool_t * pool)5842 slice_remaining_ranges(apr_array_header_t *children_with_mergeinfo,
5843 svn_boolean_t is_rollback, svn_revnum_t end_rev,
5844 apr_pool_t *pool)
5845 {
5846 int i;
5847 for (i = 0; i < children_with_mergeinfo->nelts; i++)
5848 {
5849 svn_client__merge_path_t *child =
5850 APR_ARRAY_IDX(children_with_mergeinfo, i,
5851 svn_client__merge_path_t *);
5852 if (!child || child->absent)
5853 continue;
5854 if (child->remaining_ranges->nelts > 0)
5855 {
5856 svn_merge_range_t *range = APR_ARRAY_IDX(child->remaining_ranges, 0,
5857 svn_merge_range_t *);
5858 if ((is_rollback && (range->start > end_rev)
5859 && (range->end < end_rev))
5860 || (!is_rollback && (range->start < end_rev)
5861 && (range->end > end_rev)))
5862 {
5863 svn_merge_range_t *split_range1, *split_range2;
5864
5865 split_range1 = svn_merge_range_dup(range, pool);
5866 split_range2 = svn_merge_range_dup(range, pool);
5867 split_range1->end = end_rev;
5868 split_range2->start = end_rev;
5869 APR_ARRAY_IDX(child->remaining_ranges, 0,
5870 svn_merge_range_t *) = split_range1;
5871 svn_sort__array_insert(&split_range2, child->remaining_ranges, 1);
5872 }
5873 }
5874 }
5875 }
5876
5877 /* Helper for do_directory_merge().
5878
5879 For each child in CHILDREN_WITH_MERGEINFO remove the first remaining_ranges
5880 svn_merge_range_t *element of the child if that range has an end revision
5881 equal to REVISION.
5882
5883 If a range is removed from a child's remaining_ranges array, allocate the
5884 new remaining_ranges array in POOL.
5885 */
5886 static void
remove_first_range_from_remaining_ranges(svn_revnum_t revision,apr_array_header_t * children_with_mergeinfo,apr_pool_t * pool)5887 remove_first_range_from_remaining_ranges(svn_revnum_t revision,
5888 apr_array_header_t
5889 *children_with_mergeinfo,
5890 apr_pool_t *pool)
5891 {
5892 int i;
5893
5894 for (i = 0; i < children_with_mergeinfo->nelts; i++)
5895 {
5896 svn_client__merge_path_t *child =
5897 APR_ARRAY_IDX(children_with_mergeinfo, i,
5898 svn_client__merge_path_t *);
5899 if (!child || child->absent)
5900 continue;
5901 if (child->remaining_ranges->nelts > 0)
5902 {
5903 svn_merge_range_t *first_range =
5904 APR_ARRAY_IDX(child->remaining_ranges, 0, svn_merge_range_t *);
5905 if (first_range->end == revision)
5906 {
5907 svn_sort__array_delete(child->remaining_ranges, 0, 1);
5908 }
5909 }
5910 }
5911 }
5912
5913 /* Get a file's content and properties from the repository.
5914 Set *FILENAME to the local path to a new temporary file holding its text,
5915 and set *PROPS to a new hash of its properties.
5916
5917 RA_SESSION is a session open to the correct repository, which will be
5918 temporarily reparented to the URL of the file itself. LOCATION is the
5919 repository location of the file.
5920
5921 The resulting file and the return values live as long as RESULT_POOL, all
5922 other allocations occur in SCRATCH_POOL.
5923 */
5924 static svn_error_t *
single_file_merge_get_file(const char ** filename,apr_hash_t ** props,svn_ra_session_t * ra_session,const svn_client__pathrev_t * location,const char * wc_target,apr_pool_t * result_pool,apr_pool_t * scratch_pool)5925 single_file_merge_get_file(const char **filename,
5926 apr_hash_t **props,
5927 svn_ra_session_t *ra_session,
5928 const svn_client__pathrev_t *location,
5929 const char *wc_target,
5930 apr_pool_t *result_pool,
5931 apr_pool_t *scratch_pool)
5932 {
5933 svn_stream_t *stream;
5934 const char *old_sess_url;
5935 svn_error_t *err;
5936
5937 SVN_ERR(svn_stream_open_unique(&stream, filename, NULL,
5938 svn_io_file_del_on_pool_cleanup,
5939 result_pool, scratch_pool));
5940
5941 SVN_ERR(svn_client__ensure_ra_session_url(&old_sess_url, ra_session, location->url,
5942 scratch_pool));
5943 err = svn_ra_get_file(ra_session, "", location->rev,
5944 stream, NULL, props, scratch_pool);
5945 SVN_ERR(svn_error_compose_create(
5946 err, svn_ra_reparent(ra_session, old_sess_url, scratch_pool)));
5947
5948 return svn_error_trace(svn_stream_close(stream));
5949 }
5950
5951 /* Compare two svn_client__merge_path_t elements **A and **B, given the
5952 addresses of pointers to them. Return an integer less than, equal to, or
5953 greater than zero if A sorts before, the same as, or after B, respectively.
5954 This is a helper for qsort() and bsearch() on an array of such elements. */
5955 static int
compare_merge_path_t_as_paths(const void * a,const void * b)5956 compare_merge_path_t_as_paths(const void *a,
5957 const void *b)
5958 {
5959 const svn_client__merge_path_t *child1
5960 = *((const svn_client__merge_path_t * const *) a);
5961 const svn_client__merge_path_t *child2
5962 = *((const svn_client__merge_path_t * const *) b);
5963
5964 return svn_path_compare_paths(child1->abspath, child2->abspath);
5965 }
5966
5967 /* Return a pointer to the element of CHILDREN_WITH_MERGEINFO whose path
5968 * is PATH, or return NULL if there is no such element. */
5969 static svn_client__merge_path_t *
get_child_with_mergeinfo(const apr_array_header_t * children_with_mergeinfo,const char * abspath)5970 get_child_with_mergeinfo(const apr_array_header_t *children_with_mergeinfo,
5971 const char *abspath)
5972 {
5973 svn_client__merge_path_t merge_path;
5974 svn_client__merge_path_t *key;
5975 svn_client__merge_path_t **pchild;
5976
5977 merge_path.abspath = abspath;
5978 key = &merge_path;
5979 pchild = bsearch(&key, children_with_mergeinfo->elts,
5980 children_with_mergeinfo->nelts,
5981 children_with_mergeinfo->elt_size,
5982 compare_merge_path_t_as_paths);
5983 return pchild ? *pchild : NULL;
5984 }
5985
5986 /* Insert a deep copy of INSERT_ELEMENT into the CHILDREN_WITH_MERGEINFO
5987 array at its correct position. Allocate the new storage in POOL.
5988 CHILDREN_WITH_MERGEINFO is a depth first sorted array of
5989 (svn_client__merge_path_t *).
5990
5991 ### Most callers don't need this to deep-copy the new element.
5992 ### It may be more efficient for some callers to insert a bunch of items
5993 out of order and then sort afterwards. (One caller is doing a qsort
5994 after calling this anyway.)
5995 */
5996 static void
insert_child_to_merge(apr_array_header_t * children_with_mergeinfo,const svn_client__merge_path_t * insert_element,apr_pool_t * pool)5997 insert_child_to_merge(apr_array_header_t *children_with_mergeinfo,
5998 const svn_client__merge_path_t *insert_element,
5999 apr_pool_t *pool)
6000 {
6001 int insert_index;
6002 const svn_client__merge_path_t *new_element;
6003
6004 /* Find where to insert the new element */
6005 insert_index =
6006 svn_sort__bsearch_lower_bound(&insert_element, children_with_mergeinfo,
6007 compare_merge_path_t_as_paths);
6008
6009 new_element = svn_client__merge_path_dup(insert_element, pool);
6010 svn_sort__array_insert(&new_element, children_with_mergeinfo, insert_index);
6011 }
6012
6013 /* Helper for get_mergeinfo_paths().
6014
6015 CHILDREN_WITH_MERGEINFO, DEPTH, and POOL are
6016 all cascaded from the arguments of the same name to get_mergeinfo_paths().
6017
6018 TARGET is the merge target.
6019
6020 *CHILD is the element in in CHILDREN_WITH_MERGEINFO that
6021 get_mergeinfo_paths() is iterating over and *CURR_INDEX is index for
6022 *CHILD.
6023
6024 If CHILD->ABSPATH is equal to MERGE_CMD_BATON->target->abspath do nothing.
6025 Else if CHILD->ABSPATH is switched or absent then make sure its immediate
6026 (as opposed to nearest) parent in CHILDREN_WITH_MERGEINFO is marked as
6027 missing a child. If the immediate parent does not exist in
6028 CHILDREN_WITH_MERGEINFO then create it (and increment *CURR_INDEX so that
6029 caller doesn't process the inserted element). Also ensure that
6030 CHILD->ABSPATH's siblings which are not already present in
6031 CHILDREN_WITH_MERGEINFO are also added to the array, limited by DEPTH
6032 (e.g. don't add directory siblings of a switched file).
6033 Use POOL for temporary allocations only, any new CHILDREN_WITH_MERGEINFO
6034 elements are allocated in POOL. */
6035 static svn_error_t *
insert_parent_and_sibs_of_sw_absent_del_subtree(apr_array_header_t * children_with_mergeinfo,const merge_target_t * target,int * curr_index,svn_client__merge_path_t * child,svn_depth_t depth,svn_client_ctx_t * ctx,apr_pool_t * pool)6036 insert_parent_and_sibs_of_sw_absent_del_subtree(
6037 apr_array_header_t *children_with_mergeinfo,
6038 const merge_target_t *target,
6039 int *curr_index,
6040 svn_client__merge_path_t *child,
6041 svn_depth_t depth,
6042 svn_client_ctx_t *ctx,
6043 apr_pool_t *pool)
6044 {
6045 svn_client__merge_path_t *parent;
6046 const char *parent_abspath;
6047 apr_pool_t *iterpool;
6048 const apr_array_header_t *children;
6049 int i;
6050
6051 if (!(child->absent
6052 || (child->switched
6053 && strcmp(target->abspath,
6054 child->abspath) != 0)))
6055 return SVN_NO_ERROR;
6056
6057 parent_abspath = svn_dirent_dirname(child->abspath, pool);
6058 parent = get_child_with_mergeinfo(children_with_mergeinfo, parent_abspath);
6059 if (parent)
6060 {
6061 parent->missing_child = child->absent;
6062 parent->switched_child = child->switched;
6063 }
6064 else
6065 {
6066 /* Create a new element to insert into CHILDREN_WITH_MERGEINFO. */
6067 parent = svn_client__merge_path_create(parent_abspath, pool);
6068 parent->missing_child = child->absent;
6069 parent->switched_child = child->switched;
6070 /* Insert PARENT into CHILDREN_WITH_MERGEINFO. */
6071 insert_child_to_merge(children_with_mergeinfo, parent, pool);
6072 /* Increment for loop index so we don't process the inserted element. */
6073 (*curr_index)++;
6074 } /*(parent == NULL) */
6075
6076 /* Add all of PARENT's non-missing children that are not already present.*/
6077 SVN_ERR(svn_wc__node_get_children(&children, ctx->wc_ctx,
6078 parent_abspath, FALSE, pool, pool));
6079 iterpool = svn_pool_create(pool);
6080 for (i = 0; i < children->nelts; i++)
6081 {
6082 const char *child_abspath = APR_ARRAY_IDX(children, i, const char *);
6083 svn_client__merge_path_t *sibling_of_missing;
6084
6085 svn_pool_clear(iterpool);
6086
6087 /* Does this child already exist in CHILDREN_WITH_MERGEINFO? */
6088 sibling_of_missing = get_child_with_mergeinfo(children_with_mergeinfo,
6089 child_abspath);
6090 /* Create the missing child and insert it into CHILDREN_WITH_MERGEINFO.*/
6091 if (!sibling_of_missing)
6092 {
6093 /* Don't add directory children if DEPTH is svn_depth_files. */
6094 if (depth == svn_depth_files)
6095 {
6096 svn_node_kind_t child_kind;
6097
6098 SVN_ERR(svn_wc_read_kind2(&child_kind,
6099 ctx->wc_ctx, child_abspath,
6100 FALSE, FALSE, iterpool));
6101 if (child_kind != svn_node_file)
6102 continue;
6103 }
6104
6105 sibling_of_missing = svn_client__merge_path_create(child_abspath,
6106 pool);
6107 insert_child_to_merge(children_with_mergeinfo, sibling_of_missing,
6108 pool);
6109 }
6110 }
6111
6112 svn_pool_destroy(iterpool);
6113
6114 return SVN_NO_ERROR;
6115 }
6116
6117 /* pre_merge_status_cb's baton */
6118 struct pre_merge_status_baton_t
6119 {
6120 svn_wc_context_t *wc_ctx;
6121
6122 /* const char *absolute_wc_path to svn_depth_t * mapping for depths
6123 of empty, immediates, and files. */
6124 apr_hash_t *shallow_subtrees;
6125
6126 /* const char *absolute_wc_path to the same, for all paths missing
6127 from the working copy. */
6128 apr_hash_t *missing_subtrees;
6129
6130 /* const char *absolute_wc_path const char * repos relative path, describing
6131 the root of each switched subtree in the working copy and the repository
6132 relative path it is switched to. */
6133 apr_hash_t *switched_subtrees;
6134
6135 /* A pool to allocate additions to the above hashes in. */
6136 apr_pool_t *pool;
6137 };
6138
6139 /* A svn_wc_status_func4_t callback used by get_mergeinfo_paths to gather
6140 all switched, depth filtered and missing subtrees under a merge target.
6141
6142 Note that this doesn't see server and user excluded trees. */
6143 static svn_error_t *
pre_merge_status_cb(void * baton,const char * local_abspath,const svn_wc_status3_t * status,apr_pool_t * scratch_pool)6144 pre_merge_status_cb(void *baton,
6145 const char *local_abspath,
6146 const svn_wc_status3_t *status,
6147 apr_pool_t *scratch_pool)
6148 {
6149 struct pre_merge_status_baton_t *pmsb = baton;
6150
6151 if (status->switched && !status->file_external)
6152 {
6153 store_path(pmsb->switched_subtrees, local_abspath);
6154 }
6155
6156 if (status->depth == svn_depth_empty
6157 || status->depth == svn_depth_files)
6158 {
6159 const char *dup_abspath;
6160 svn_depth_t *depth = apr_pmemdup(pmsb->pool, &status->depth,
6161 sizeof *depth);
6162
6163 dup_abspath = apr_pstrdup(pmsb->pool, local_abspath);
6164
6165 svn_hash_sets(pmsb->shallow_subtrees, dup_abspath, depth);
6166 }
6167
6168 if (status->node_status == svn_wc_status_missing)
6169 {
6170 svn_boolean_t new_missing_root = TRUE;
6171 apr_hash_index_t *hi;
6172
6173 for (hi = apr_hash_first(scratch_pool, pmsb->missing_subtrees);
6174 hi;
6175 hi = apr_hash_next(hi))
6176 {
6177 const char *missing_root_path = svn__apr_hash_index_key(hi);
6178
6179 if (svn_dirent_is_ancestor(missing_root_path,
6180 local_abspath))
6181 {
6182 new_missing_root = FALSE;
6183 break;
6184 }
6185 }
6186
6187 if (new_missing_root)
6188 store_path(pmsb->missing_subtrees, local_abspath);
6189 }
6190
6191 return SVN_NO_ERROR;
6192 }
6193
6194 /* Find all the subtrees in the working copy tree rooted at TARGET_ABSPATH
6195 * that have explicit mergeinfo.
6196 * Set *SUBTREES_WITH_MERGEINFO to a hash mapping (const char *) absolute
6197 * WC path to (svn_mergeinfo_t *) mergeinfo.
6198 *
6199 * ### Is this function equivalent to:
6200 *
6201 * svn_client__get_wc_mergeinfo_catalog(
6202 * subtrees_with_mergeinfo, inherited=NULL, include_descendants=TRUE,
6203 * svn_mergeinfo_explicit, target_abspath, limit_path=NULL,
6204 * walked_path=NULL, ignore_invalid_mergeinfo=FALSE, ...)
6205 *
6206 * except for the catalog keys being abspaths instead of repo-relpaths?
6207 */
6208 static svn_error_t *
get_wc_explicit_mergeinfo_catalog(apr_hash_t ** subtrees_with_mergeinfo,const char * target_abspath,svn_depth_t depth,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)6209 get_wc_explicit_mergeinfo_catalog(apr_hash_t **subtrees_with_mergeinfo,
6210 const char *target_abspath,
6211 svn_depth_t depth,
6212 svn_client_ctx_t *ctx,
6213 apr_pool_t *result_pool,
6214 apr_pool_t *scratch_pool)
6215 {
6216 svn_opt_revision_t working_revision = { svn_opt_revision_working, { 0 } };
6217 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
6218 apr_hash_index_t *hi;
6219 apr_hash_t *externals;
6220
6221 SVN_ERR(svn_client_propget5(subtrees_with_mergeinfo, NULL,
6222 SVN_PROP_MERGEINFO, target_abspath,
6223 &working_revision, &working_revision, NULL,
6224 depth, NULL, ctx, result_pool, scratch_pool));
6225
6226 SVN_ERR(svn_wc__externals_defined_below(&externals, ctx->wc_ctx,
6227 target_abspath, scratch_pool,
6228 scratch_pool));
6229
6230 /* Convert property values to svn_mergeinfo_t. */
6231 for (hi = apr_hash_first(scratch_pool, *subtrees_with_mergeinfo);
6232 hi;
6233 hi = apr_hash_next(hi))
6234 {
6235 const char *wc_path = svn__apr_hash_index_key(hi);
6236 svn_string_t *mergeinfo_string = svn__apr_hash_index_val(hi);
6237 svn_mergeinfo_t mergeinfo;
6238 svn_error_t *err;
6239
6240 /* svn_client_propget5 picks up file externals with
6241 mergeinfo, but we don't want those. */
6242 if (svn_hash_gets(externals, wc_path))
6243 {
6244 svn_hash_sets(*subtrees_with_mergeinfo, wc_path, NULL);
6245 continue;
6246 }
6247
6248 svn_pool_clear(iterpool);
6249
6250 err = svn_mergeinfo_parse(&mergeinfo, mergeinfo_string->data,
6251 result_pool);
6252 if (err)
6253 {
6254 if (err->apr_err == SVN_ERR_MERGEINFO_PARSE_ERROR)
6255 {
6256 err = svn_error_createf(
6257 SVN_ERR_CLIENT_INVALID_MERGEINFO_NO_MERGETRACKING, err,
6258 _("Invalid mergeinfo detected on '%s', "
6259 "merge tracking not possible"),
6260 svn_dirent_local_style(wc_path, scratch_pool));
6261 }
6262 return svn_error_trace(err);
6263 }
6264 svn_hash_sets(*subtrees_with_mergeinfo, wc_path, mergeinfo);
6265 }
6266 svn_pool_destroy(iterpool);
6267
6268 return SVN_NO_ERROR;
6269 }
6270
6271 /* Helper for do_directory_merge() when performing merge-tracking aware
6272 merges.
6273
6274 Walk of the working copy tree rooted at TARGET->abspath to
6275 depth DEPTH. Create an svn_client__merge_path_t * for any path which meets
6276 one or more of the following criteria:
6277
6278 1) Path has working svn:mergeinfo.
6279 2) Path is switched.
6280 3) Path is a subtree of the merge target (i.e. is not equal to
6281 TARGET->abspath) and has no mergeinfo of its own but
6282 its immediate parent has mergeinfo with non-inheritable ranges. If
6283 this isn't a dry-run and the merge is between differences in the same
6284 repository, then this function will set working mergeinfo on the path
6285 equal to the mergeinfo inheritable from its parent.
6286 4) Path has an immediate child (or children) missing from the WC because
6287 the child is switched or absent from the WC, or due to a sparse
6288 checkout.
6289 5) Path has a sibling (or siblings) missing from the WC because the
6290 sibling is switched, absent, scheduled for deletion, or missing due to
6291 a sparse checkout.
6292 6) Path is absent from disk due to an authz restriction.
6293 7) Path is equal to TARGET->abspath.
6294 8) Path is an immediate *directory* child of
6295 TARGET->abspath and DEPTH is svn_depth_immediates.
6296 9) Path is an immediate *file* child of TARGET->abspath
6297 and DEPTH is svn_depth_files.
6298 10) Path is at a depth of 'empty' or 'files'.
6299 11) Path is missing from disk (e.g. due to an OS-level deletion).
6300
6301 If subtrees within the requested DEPTH are unexpectedly missing disk,
6302 then raise SVN_ERR_CLIENT_NOT_READY_TO_MERGE.
6303
6304 Store the svn_client__merge_path_t *'s in *CHILDREN_WITH_MERGEINFO in
6305 depth-first order based on the svn_client__merge_path_t *s path member as
6306 sorted by svn_path_compare_paths(). Set the remaining_ranges field of each
6307 element to NULL.
6308
6309 Note: Since the walk is rooted at TARGET->abspath, the
6310 latter is guaranteed to be in *CHILDREN_WITH_MERGEINFO and due to the
6311 depth-first ordering it is guaranteed to be the first element in
6312 *CHILDREN_WITH_MERGEINFO.
6313
6314 MERGE_CMD_BATON is cascaded from the argument of the same name in
6315 do_directory_merge().
6316 */
6317 static svn_error_t *
get_mergeinfo_paths(apr_array_header_t * children_with_mergeinfo,const merge_target_t * target,svn_depth_t depth,svn_boolean_t dry_run,svn_boolean_t same_repos,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)6318 get_mergeinfo_paths(apr_array_header_t *children_with_mergeinfo,
6319 const merge_target_t *target,
6320 svn_depth_t depth,
6321 svn_boolean_t dry_run,
6322 svn_boolean_t same_repos,
6323 svn_client_ctx_t *ctx,
6324 apr_pool_t *result_pool,
6325 apr_pool_t *scratch_pool)
6326 {
6327 int i;
6328 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
6329 apr_hash_t *subtrees_with_mergeinfo;
6330 apr_hash_t *excluded_subtrees;
6331 apr_hash_t *switched_subtrees;
6332 apr_hash_t *shallow_subtrees;
6333 apr_hash_t *missing_subtrees;
6334 struct pre_merge_status_baton_t pre_merge_status_baton;
6335
6336 /* Case 1: Subtrees with explicit mergeinfo. */
6337 SVN_ERR(get_wc_explicit_mergeinfo_catalog(&subtrees_with_mergeinfo,
6338 target->abspath,
6339 depth, ctx,
6340 result_pool, scratch_pool));
6341 if (subtrees_with_mergeinfo)
6342 {
6343 apr_hash_index_t *hi;
6344
6345 for (hi = apr_hash_first(scratch_pool, subtrees_with_mergeinfo);
6346 hi;
6347 hi = apr_hash_next(hi))
6348 {
6349 const char *wc_path = svn__apr_hash_index_key(hi);
6350 svn_mergeinfo_t mergeinfo = svn__apr_hash_index_val(hi);
6351 svn_client__merge_path_t *mergeinfo_child =
6352 svn_client__merge_path_create(wc_path, result_pool);
6353
6354 svn_pool_clear(iterpool);
6355
6356 /* Stash this child's pre-existing mergeinfo. */
6357 mergeinfo_child->pre_merge_mergeinfo = mergeinfo;
6358
6359 /* Note if this child has non-inheritable mergeinfo */
6360 mergeinfo_child->has_noninheritable
6361 = svn_mergeinfo__is_noninheritable(
6362 mergeinfo_child->pre_merge_mergeinfo, iterpool);
6363
6364 /* Append it. We'll sort below. */
6365 APR_ARRAY_PUSH(children_with_mergeinfo, svn_client__merge_path_t *)
6366 = svn_client__merge_path_dup(mergeinfo_child, result_pool);
6367 }
6368
6369 /* Sort CHILDREN_WITH_MERGEINFO by each child's path (i.e. as per
6370 compare_merge_path_t_as_paths). Any subsequent insertions of new
6371 children with insert_child_to_merge() require this ordering. */
6372 qsort(children_with_mergeinfo->elts,
6373 children_with_mergeinfo->nelts,
6374 children_with_mergeinfo->elt_size,
6375 compare_merge_path_t_as_paths);
6376 }
6377
6378 /* Case 2: Switched subtrees
6379 Case 10: Paths at depths of 'empty' or 'files'
6380 Case 11: Paths missing from disk */
6381 pre_merge_status_baton.wc_ctx = ctx->wc_ctx;
6382 switched_subtrees = apr_hash_make(scratch_pool);
6383 pre_merge_status_baton.switched_subtrees = switched_subtrees;
6384 shallow_subtrees = apr_hash_make(scratch_pool);
6385 pre_merge_status_baton.shallow_subtrees = shallow_subtrees;
6386 missing_subtrees = apr_hash_make(scratch_pool);
6387 pre_merge_status_baton.missing_subtrees = missing_subtrees;
6388 pre_merge_status_baton.pool = scratch_pool;
6389 SVN_ERR(svn_wc_walk_status(ctx->wc_ctx,
6390 target->abspath,
6391 depth,
6392 TRUE /* get_all */,
6393 FALSE /* no_ignore */,
6394 TRUE /* ignore_text_mods */,
6395 NULL /* ingore_patterns */,
6396 pre_merge_status_cb, &pre_merge_status_baton,
6397 ctx->cancel_func, ctx->cancel_baton,
6398 scratch_pool));
6399
6400 /* Issue #2915: Raise an error describing the roots of any missing
6401 subtrees, i.e. those that the WC thinks are on disk but have been
6402 removed outside of Subversion. */
6403 if (apr_hash_count(missing_subtrees))
6404 {
6405 apr_hash_index_t *hi;
6406 svn_stringbuf_t *missing_subtree_err_buf =
6407 svn_stringbuf_create(_("Merge tracking not allowed with missing "
6408 "subtrees; try restoring these items "
6409 "first:\n"), scratch_pool);
6410
6411 for (hi = apr_hash_first(scratch_pool, missing_subtrees);
6412 hi;
6413 hi = apr_hash_next(hi))
6414 {
6415 svn_pool_clear(iterpool);
6416 svn_stringbuf_appendcstr(missing_subtree_err_buf,
6417 svn_dirent_local_style(
6418 svn__apr_hash_index_key(hi), iterpool));
6419 svn_stringbuf_appendcstr(missing_subtree_err_buf, "\n");
6420 }
6421
6422 return svn_error_create(SVN_ERR_CLIENT_NOT_READY_TO_MERGE,
6423 NULL, missing_subtree_err_buf->data);
6424 }
6425
6426 if (apr_hash_count(switched_subtrees))
6427 {
6428 apr_hash_index_t *hi;
6429
6430 for (hi = apr_hash_first(scratch_pool, switched_subtrees);
6431 hi;
6432 hi = apr_hash_next(hi))
6433 {
6434 const char *wc_path = svn__apr_hash_index_key(hi);
6435 svn_client__merge_path_t *child = get_child_with_mergeinfo(
6436 children_with_mergeinfo, wc_path);
6437
6438 if (child)
6439 {
6440 child->switched = TRUE;
6441 }
6442 else
6443 {
6444 svn_client__merge_path_t *switched_child =
6445 svn_client__merge_path_create(wc_path, result_pool);
6446 switched_child->switched = TRUE;
6447 insert_child_to_merge(children_with_mergeinfo, switched_child,
6448 result_pool);
6449 }
6450 }
6451 }
6452
6453 if (apr_hash_count(shallow_subtrees))
6454 {
6455 apr_hash_index_t *hi;
6456
6457 for (hi = apr_hash_first(scratch_pool, shallow_subtrees);
6458 hi;
6459 hi = apr_hash_next(hi))
6460 {
6461 svn_boolean_t new_shallow_child = FALSE;
6462 const char *wc_path = svn__apr_hash_index_key(hi);
6463 svn_depth_t *child_depth = svn__apr_hash_index_val(hi);
6464 svn_client__merge_path_t *shallow_child = get_child_with_mergeinfo(
6465 children_with_mergeinfo, wc_path);
6466
6467 if (shallow_child)
6468 {
6469 if (*child_depth == svn_depth_empty
6470 || *child_depth == svn_depth_files)
6471 shallow_child->missing_child = TRUE;
6472 }
6473 else
6474 {
6475 shallow_child = svn_client__merge_path_create(wc_path,
6476 result_pool);
6477 new_shallow_child = TRUE;
6478
6479 if (*child_depth == svn_depth_empty
6480 || *child_depth == svn_depth_files)
6481 shallow_child->missing_child = TRUE;
6482 }
6483
6484 /* A little trickery: If PATH doesn't have any mergeinfo or has
6485 only inheritable mergeinfo, we still describe it as having
6486 non-inheritable mergeinfo if it is missing a child due to
6487 a shallow depth. Why? Because the mergeinfo we'll add to PATH
6488 to describe the merge must be non-inheritable, so PATH's missing
6489 children don't inherit it. Marking these PATHs as non-
6490 inheritable allows the logic for case 3 to properly account
6491 for PATH's children. */
6492 if (!shallow_child->has_noninheritable
6493 && (*child_depth == svn_depth_empty
6494 || *child_depth == svn_depth_files))
6495 {
6496 shallow_child->has_noninheritable = TRUE;
6497 }
6498
6499 if (new_shallow_child)
6500 insert_child_to_merge(children_with_mergeinfo, shallow_child,
6501 result_pool);
6502 }
6503 }
6504
6505 /* Case 6: Paths absent from disk due to server or user exclusion. */
6506 SVN_ERR(svn_wc__get_excluded_subtrees(&excluded_subtrees,
6507 ctx->wc_ctx, target->abspath,
6508 result_pool, scratch_pool));
6509 if (excluded_subtrees)
6510 {
6511 apr_hash_index_t *hi;
6512
6513 for (hi = apr_hash_first(scratch_pool, excluded_subtrees);
6514 hi;
6515 hi = apr_hash_next(hi))
6516 {
6517 const char *wc_path = svn__apr_hash_index_key(hi);
6518 svn_client__merge_path_t *child = get_child_with_mergeinfo(
6519 children_with_mergeinfo, wc_path);
6520
6521 if (child)
6522 {
6523 child->absent = TRUE;
6524 }
6525 else
6526 {
6527 svn_client__merge_path_t *absent_child =
6528 svn_client__merge_path_create(wc_path, result_pool);
6529 absent_child->absent = TRUE;
6530 insert_child_to_merge(children_with_mergeinfo, absent_child,
6531 result_pool);
6532 }
6533 }
6534 }
6535
6536 /* Case 7: The merge target MERGE_CMD_BATON->target->abspath is always
6537 present. */
6538 if (!get_child_with_mergeinfo(children_with_mergeinfo,
6539 target->abspath))
6540 {
6541 svn_client__merge_path_t *target_child =
6542 svn_client__merge_path_create(target->abspath,
6543 result_pool);
6544 insert_child_to_merge(children_with_mergeinfo, target_child,
6545 result_pool);
6546 }
6547
6548 /* Case 8: Path is an immediate *directory* child of
6549 MERGE_CMD_BATON->target->abspath and DEPTH is svn_depth_immediates.
6550
6551 Case 9: Path is an immediate *file* child of
6552 MERGE_CMD_BATON->target->abspath and DEPTH is svn_depth_files. */
6553 if (depth == svn_depth_immediates || depth == svn_depth_files)
6554 {
6555 int j;
6556 const apr_array_header_t *immediate_children;
6557
6558 SVN_ERR(svn_wc__node_get_children_of_working_node(
6559 &immediate_children, ctx->wc_ctx,
6560 target->abspath, FALSE, scratch_pool, scratch_pool));
6561
6562 for (j = 0; j < immediate_children->nelts; j++)
6563 {
6564 const char *immediate_child_abspath =
6565 APR_ARRAY_IDX(immediate_children, j, const char *);
6566 svn_node_kind_t immediate_child_kind;
6567
6568 svn_pool_clear(iterpool);
6569 SVN_ERR(svn_wc_read_kind2(&immediate_child_kind,
6570 ctx->wc_ctx, immediate_child_abspath,
6571 FALSE, FALSE, iterpool));
6572 if ((immediate_child_kind == svn_node_dir
6573 && depth == svn_depth_immediates)
6574 || (immediate_child_kind == svn_node_file
6575 && depth == svn_depth_files))
6576 {
6577 if (!get_child_with_mergeinfo(children_with_mergeinfo,
6578 immediate_child_abspath))
6579 {
6580 svn_client__merge_path_t *immediate_child =
6581 svn_client__merge_path_create(immediate_child_abspath,
6582 result_pool);
6583
6584 if (immediate_child_kind == svn_node_dir
6585 && depth == svn_depth_immediates)
6586 immediate_child->immediate_child_dir = TRUE;
6587
6588 insert_child_to_merge(children_with_mergeinfo,
6589 immediate_child, result_pool);
6590 }
6591 }
6592 }
6593 }
6594
6595 /* If DEPTH isn't empty then cover cases 3), 4), and 5), possibly adding
6596 elements to CHILDREN_WITH_MERGEINFO. */
6597 if (depth <= svn_depth_empty)
6598 return SVN_NO_ERROR;
6599
6600 for (i = 0; i < children_with_mergeinfo->nelts; i++)
6601 {
6602 svn_client__merge_path_t *child =
6603 APR_ARRAY_IDX(children_with_mergeinfo, i,
6604 svn_client__merge_path_t *);
6605 svn_pool_clear(iterpool);
6606
6607 /* Case 3) Where merging to a path with a switched child the path
6608 gets non-inheritable mergeinfo for the merge range performed and
6609 the child gets its own set of mergeinfo. If the switched child
6610 later "returns", e.g. a switched path is unswitched, the child
6611 may not have any explicit mergeinfo. If the initial merge is
6612 repeated we don't want to repeat the merge for the path, but we
6613 do want to repeat it for the previously switched child. To
6614 ensure this we check if all of CHILD's non-missing children have
6615 explicit mergeinfo (they should already be present in
6616 CHILDREN_WITH_MERGEINFO if they do). If not,
6617 add the children without mergeinfo to CHILDREN_WITH_MERGEINFO so
6618 do_directory_merge() will merge them independently.
6619
6620 But that's not enough! Since do_directory_merge() performs
6621 the merges on the paths in CHILDREN_WITH_MERGEINFO in a depth
6622 first manner it will merge the previously switched path's parent
6623 first. As part of this merge it will update the parent's
6624 previously non-inheritable mergeinfo and make it inheritable
6625 (since it notices the path has no missing children), then when
6626 do_directory_merge() finally merges the previously missing
6627 child it needs to get mergeinfo from the child's nearest
6628 ancestor, but since do_directory_merge() already tweaked that
6629 mergeinfo, removing the non-inheritable flag, it appears that the
6630 child already has been merged to. To prevent this we set
6631 override mergeinfo on the child now, before any merging is done,
6632 so it has explicit mergeinfo that reflects only CHILD's
6633 inheritable mergeinfo. */
6634
6635 /* If depth is immediates or files then don't add new children if
6636 CHILD is a subtree of the merge target; those children are below
6637 the operational depth of the merge. */
6638 if (child->has_noninheritable
6639 && (i == 0 || depth == svn_depth_infinity))
6640 {
6641 const apr_array_header_t *children;
6642 int j;
6643
6644 SVN_ERR(svn_wc__node_get_children(&children,
6645 ctx->wc_ctx,
6646 child->abspath, FALSE,
6647 iterpool, iterpool));
6648 for (j = 0; j < children->nelts; j++)
6649 {
6650 svn_client__merge_path_t *child_of_noninheritable;
6651 const char *child_abspath = APR_ARRAY_IDX(children, j,
6652 const char*);
6653
6654 /* Does this child already exist in CHILDREN_WITH_MERGEINFO?
6655 If not, create it and insert it into
6656 CHILDREN_WITH_MERGEINFO and set override mergeinfo on
6657 it. */
6658 child_of_noninheritable =
6659 get_child_with_mergeinfo(children_with_mergeinfo,
6660 child_abspath);
6661 if (!child_of_noninheritable)
6662 {
6663 /* Don't add directory children if DEPTH
6664 is svn_depth_files. */
6665 if (depth == svn_depth_files)
6666 {
6667 svn_node_kind_t child_kind;
6668 SVN_ERR(svn_wc_read_kind2(&child_kind,
6669 ctx->wc_ctx, child_abspath,
6670 FALSE, FALSE, iterpool));
6671 if (child_kind != svn_node_file)
6672 continue;
6673 }
6674 /* else DEPTH is infinity or immediates so we want both
6675 directory and file children. */
6676
6677 child_of_noninheritable =
6678 svn_client__merge_path_create(child_abspath, result_pool);
6679 child_of_noninheritable->child_of_noninheritable = TRUE;
6680 insert_child_to_merge(children_with_mergeinfo,
6681 child_of_noninheritable,
6682 result_pool);
6683 if (!dry_run && same_repos)
6684 {
6685 svn_mergeinfo_t mergeinfo;
6686
6687 SVN_ERR(svn_client__get_wc_mergeinfo(
6688 &mergeinfo, NULL,
6689 svn_mergeinfo_nearest_ancestor,
6690 child_of_noninheritable->abspath,
6691 target->abspath, NULL, FALSE,
6692 ctx, iterpool, iterpool));
6693
6694 SVN_ERR(svn_client__record_wc_mergeinfo(
6695 child_of_noninheritable->abspath, mergeinfo,
6696 FALSE, ctx, iterpool));
6697 }
6698 }
6699 }
6700 }
6701 /* Case 4 and 5 are handled by the following function. */
6702 SVN_ERR(insert_parent_and_sibs_of_sw_absent_del_subtree(
6703 children_with_mergeinfo, target, &i, child,
6704 depth, ctx, result_pool));
6705 } /* i < children_with_mergeinfo->nelts */
6706 svn_pool_destroy(iterpool);
6707
6708 return SVN_NO_ERROR;
6709 }
6710
6711
6712 /* Implements the svn_log_entry_receiver_t interface.
6713 *
6714 * BATON is an 'apr_array_header_t *' array of 'svn_revnum_t'.
6715 * Push a copy of LOG_ENTRY->revision onto BATON. Thus, a
6716 * series of invocations of this callback accumulates the
6717 * corresponding set of revisions into BATON.
6718 */
6719 static svn_error_t *
log_changed_revs(void * baton,svn_log_entry_t * log_entry,apr_pool_t * pool)6720 log_changed_revs(void *baton,
6721 svn_log_entry_t *log_entry,
6722 apr_pool_t *pool)
6723 {
6724 apr_array_header_t *revs = baton;
6725
6726 APR_ARRAY_PUSH(revs, svn_revnum_t) = log_entry->revision;
6727 return SVN_NO_ERROR;
6728 }
6729
6730
6731 /* Set *MIN_REV_P to the oldest and *MAX_REV_P to the youngest start or end
6732 * revision occurring in RANGELIST, or to SVN_INVALID_REVNUM if RANGELIST
6733 * is empty. */
6734 static void
merge_range_find_extremes(svn_revnum_t * min_rev_p,svn_revnum_t * max_rev_p,const svn_rangelist_t * rangelist)6735 merge_range_find_extremes(svn_revnum_t *min_rev_p,
6736 svn_revnum_t *max_rev_p,
6737 const svn_rangelist_t *rangelist)
6738 {
6739 int i;
6740
6741 *min_rev_p = SVN_INVALID_REVNUM;
6742 *max_rev_p = SVN_INVALID_REVNUM;
6743 for (i = 0; i < rangelist->nelts; i++)
6744 {
6745 svn_merge_range_t *range
6746 = APR_ARRAY_IDX(rangelist, i, svn_merge_range_t *);
6747 svn_revnum_t range_min = MIN(range->start, range->end);
6748 svn_revnum_t range_max = MAX(range->start, range->end);
6749
6750 if ((! SVN_IS_VALID_REVNUM(*min_rev_p)) || (range_min < *min_rev_p))
6751 *min_rev_p = range_min;
6752 if ((! SVN_IS_VALID_REVNUM(*max_rev_p)) || (range_max > *max_rev_p))
6753 *max_rev_p = range_max;
6754 }
6755 }
6756
6757 /* Wrapper around svn_ra_get_log2(). Invoke RECEIVER with RECEIVER_BATON
6758 * on each commit from YOUNGEST_REV to OLDEST_REV in which TARGET_RELPATH
6759 * changed. TARGET_RELPATH is relative to RA_SESSION's URL.
6760 * Important: Revision properties are not retrieved by this function for
6761 * performance reasons.
6762 */
6763 static svn_error_t *
get_log(svn_ra_session_t * ra_session,const char * target_relpath,svn_revnum_t youngest_rev,svn_revnum_t oldest_rev,svn_boolean_t discover_changed_paths,svn_log_entry_receiver_t receiver,void * receiver_baton,apr_pool_t * pool)6764 get_log(svn_ra_session_t *ra_session,
6765 const char *target_relpath,
6766 svn_revnum_t youngest_rev,
6767 svn_revnum_t oldest_rev,
6768 svn_boolean_t discover_changed_paths,
6769 svn_log_entry_receiver_t receiver,
6770 void *receiver_baton,
6771 apr_pool_t *pool)
6772 {
6773 apr_array_header_t *log_targets;
6774 apr_array_header_t *revprops;
6775
6776 log_targets = apr_array_make(pool, 1, sizeof(const char *));
6777 APR_ARRAY_PUSH(log_targets, const char *) = target_relpath;
6778
6779 revprops = apr_array_make(pool, 0, sizeof(const char *));
6780
6781 SVN_ERR(svn_ra_get_log2(ra_session, log_targets, youngest_rev,
6782 oldest_rev, 0 /* limit */, discover_changed_paths,
6783 FALSE /* strict_node_history */,
6784 FALSE /* include_merged_revisions */,
6785 revprops, receiver, receiver_baton, pool));
6786
6787 return SVN_NO_ERROR;
6788 }
6789
6790 /* Set *OPERATIVE_RANGES_P to an array of svn_merge_range_t * merge
6791 range objects copied wholesale from RANGES which have the property
6792 that in some revision within that range the object identified by
6793 RA_SESSION was modified (if by "modified" we mean "'svn log' would
6794 return that revision). *OPERATIVE_RANGES_P is allocated from the
6795 same pool as RANGES, and the ranges within it are shared with
6796 RANGES, too.
6797
6798 *OPERATIVE_RANGES_P may be the same as RANGES (that is, the output
6799 parameter is set only after the input is no longer used).
6800
6801 Use POOL for temporary allocations. */
6802 static svn_error_t *
remove_noop_merge_ranges(svn_rangelist_t ** operative_ranges_p,svn_ra_session_t * ra_session,const svn_rangelist_t * ranges,apr_pool_t * pool)6803 remove_noop_merge_ranges(svn_rangelist_t **operative_ranges_p,
6804 svn_ra_session_t *ra_session,
6805 const svn_rangelist_t *ranges,
6806 apr_pool_t *pool)
6807 {
6808 int i;
6809 svn_revnum_t oldest_rev, youngest_rev;
6810 apr_array_header_t *changed_revs =
6811 apr_array_make(pool, ranges->nelts, sizeof(svn_revnum_t));
6812 svn_rangelist_t *operative_ranges =
6813 apr_array_make(ranges->pool, ranges->nelts, ranges->elt_size);
6814
6815 /* Find the revision extremes of the RANGES we have. */
6816 merge_range_find_extremes(&oldest_rev, &youngest_rev, ranges);
6817 if (SVN_IS_VALID_REVNUM(oldest_rev))
6818 oldest_rev++; /* make it inclusive */
6819
6820 /* Get logs across those ranges, recording which revisions hold
6821 changes to our object's history. */
6822 SVN_ERR(get_log(ra_session, "", youngest_rev, oldest_rev, FALSE,
6823 log_changed_revs, changed_revs, pool));
6824
6825 /* Are there *any* changes? */
6826 if (changed_revs->nelts)
6827 {
6828 /* Our list of changed revisions should be in youngest-to-oldest
6829 order. */
6830 svn_revnum_t youngest_changed_rev
6831 = APR_ARRAY_IDX(changed_revs, 0, svn_revnum_t);
6832 svn_revnum_t oldest_changed_rev
6833 = APR_ARRAY_IDX(changed_revs, changed_revs->nelts - 1, svn_revnum_t);
6834
6835 /* Now, copy from RANGES to *OPERATIVE_RANGES, filtering out ranges
6836 that aren't operative (by virtue of not having any revisions
6837 represented in the CHANGED_REVS array). */
6838 for (i = 0; i < ranges->nelts; i++)
6839 {
6840 svn_merge_range_t *range = APR_ARRAY_IDX(ranges, i,
6841 svn_merge_range_t *);
6842 svn_revnum_t range_min = MIN(range->start, range->end) + 1;
6843 svn_revnum_t range_max = MAX(range->start, range->end);
6844 int j;
6845
6846 /* If the merge range is entirely outside the range of changed
6847 revisions, we've no use for it. */
6848 if ((range_min > youngest_changed_rev)
6849 || (range_max < oldest_changed_rev))
6850 continue;
6851
6852 /* Walk through the changed_revs to see if any of them fall
6853 inside our current range. */
6854 for (j = 0; j < changed_revs->nelts; j++)
6855 {
6856 svn_revnum_t changed_rev
6857 = APR_ARRAY_IDX(changed_revs, j, svn_revnum_t);
6858 if ((changed_rev >= range_min) && (changed_rev <= range_max))
6859 {
6860 APR_ARRAY_PUSH(operative_ranges, svn_merge_range_t *) =
6861 range;
6862 break;
6863 }
6864 }
6865 }
6866 }
6867
6868 *operative_ranges_p = operative_ranges;
6869 return SVN_NO_ERROR;
6870 }
6871
6872
6873 /*-----------------------------------------------------------------------*/
6874
6875 /*** Merge Source Normalization ***/
6876
6877 /* qsort-compatible sort routine, rating merge_source_t * objects to
6878 be in descending (youngest-to-oldest) order based on their ->loc1->rev
6879 component. */
6880 static int
compare_merge_source_ts(const void * a,const void * b)6881 compare_merge_source_ts(const void *a,
6882 const void *b)
6883 {
6884 svn_revnum_t a_rev = (*(const merge_source_t *const *)a)->loc1->rev;
6885 svn_revnum_t b_rev = (*(const merge_source_t *const *)b)->loc1->rev;
6886 if (a_rev == b_rev)
6887 return 0;
6888 return a_rev < b_rev ? 1 : -1;
6889 }
6890
6891 /* Set *MERGE_SOURCE_TS_P to a list of merge sources generated by
6892 slicing history location SEGMENTS with a given requested merge
6893 RANGE. Use SOURCE_LOC for full source URL calculation.
6894
6895 Order the merge sources in *MERGE_SOURCE_TS_P from oldest to
6896 youngest. */
6897 static svn_error_t *
combine_range_with_segments(apr_array_header_t ** merge_source_ts_p,const svn_merge_range_t * range,const apr_array_header_t * segments,const svn_client__pathrev_t * source_loc,apr_pool_t * pool)6898 combine_range_with_segments(apr_array_header_t **merge_source_ts_p,
6899 const svn_merge_range_t *range,
6900 const apr_array_header_t *segments,
6901 const svn_client__pathrev_t *source_loc,
6902 apr_pool_t *pool)
6903 {
6904 apr_array_header_t *merge_source_ts =
6905 apr_array_make(pool, 1, sizeof(merge_source_t *));
6906 svn_revnum_t minrev = MIN(range->start, range->end) + 1;
6907 svn_revnum_t maxrev = MAX(range->start, range->end);
6908 svn_boolean_t subtractive = (range->start > range->end);
6909 int i;
6910
6911 for (i = 0; i < segments->nelts; i++)
6912 {
6913 svn_location_segment_t *segment =
6914 APR_ARRAY_IDX(segments, i, svn_location_segment_t *);
6915 svn_client__pathrev_t *loc1, *loc2;
6916 merge_source_t *merge_source;
6917 const char *path1 = NULL;
6918 svn_revnum_t rev1;
6919
6920 /* If this segment doesn't overlap our range at all, or
6921 represents a gap, ignore it. */
6922 if ((segment->range_end < minrev)
6923 || (segment->range_start > maxrev)
6924 || (! segment->path))
6925 continue;
6926
6927 /* If our range spans a segment boundary, we have to point our
6928 merge_source_t's path1 to the path of the immediately older
6929 segment, else it points to the same location as its path2. */
6930 rev1 = MAX(segment->range_start, minrev) - 1;
6931 if (minrev <= segment->range_start)
6932 {
6933 if (i > 0)
6934 {
6935 path1 = (APR_ARRAY_IDX(segments, i - 1,
6936 svn_location_segment_t *))->path;
6937 }
6938 /* If we've backed PATH1 up into a segment gap, let's back
6939 it up further still to the segment before the gap. We'll
6940 have to adjust rev1, too. */
6941 if ((! path1) && (i > 1))
6942 {
6943 path1 = (APR_ARRAY_IDX(segments, i - 2,
6944 svn_location_segment_t *))->path;
6945 rev1 = (APR_ARRAY_IDX(segments, i - 2,
6946 svn_location_segment_t *))->range_end;
6947 }
6948 }
6949 else
6950 {
6951 path1 = apr_pstrdup(pool, segment->path);
6952 }
6953
6954 /* If we don't have two valid paths, we won't know what to do
6955 when merging. This could happen if someone requested a merge
6956 where the source didn't exist in a particular revision or
6957 something. The merge code would probably bomb out anyway, so
6958 we'll just *not* create a merge source in this case. */
6959 if (! (path1 && segment->path))
6960 continue;
6961
6962 /* Build our merge source structure. */
6963 loc1 = svn_client__pathrev_create_with_relpath(
6964 source_loc->repos_root_url, source_loc->repos_uuid,
6965 rev1, path1, pool);
6966 loc2 = svn_client__pathrev_create_with_relpath(
6967 source_loc->repos_root_url, source_loc->repos_uuid,
6968 MIN(segment->range_end, maxrev), segment->path, pool);
6969 /* If this is subtractive, reverse the whole calculation. */
6970 if (subtractive)
6971 merge_source = merge_source_create(loc2, loc1, TRUE /* ancestral */,
6972 pool);
6973 else
6974 merge_source = merge_source_create(loc1, loc2, TRUE /* ancestral */,
6975 pool);
6976
6977 APR_ARRAY_PUSH(merge_source_ts, merge_source_t *) = merge_source;
6978 }
6979
6980 /* If this was a subtractive merge, and we created more than one
6981 merge source, we need to reverse the sort ordering of our sources. */
6982 if (subtractive && (merge_source_ts->nelts > 1))
6983 qsort(merge_source_ts->elts, merge_source_ts->nelts,
6984 merge_source_ts->elt_size, compare_merge_source_ts);
6985
6986 *merge_source_ts_p = merge_source_ts;
6987 return SVN_NO_ERROR;
6988 }
6989
6990 /* Similar to normalize_merge_sources() except the input MERGE_RANGE_TS is a
6991 * rangelist.
6992 */
6993 static svn_error_t *
normalize_merge_sources_internal(apr_array_header_t ** merge_sources_p,const svn_client__pathrev_t * source_loc,const svn_rangelist_t * merge_range_ts,svn_ra_session_t * ra_session,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)6994 normalize_merge_sources_internal(apr_array_header_t **merge_sources_p,
6995 const svn_client__pathrev_t *source_loc,
6996 const svn_rangelist_t *merge_range_ts,
6997 svn_ra_session_t *ra_session,
6998 svn_client_ctx_t *ctx,
6999 apr_pool_t *result_pool,
7000 apr_pool_t *scratch_pool)
7001 {
7002 svn_revnum_t source_peg_revnum = source_loc->rev;
7003 svn_revnum_t oldest_requested, youngest_requested;
7004 svn_revnum_t trim_revision = SVN_INVALID_REVNUM;
7005 apr_array_header_t *segments;
7006 int i;
7007
7008 /* Initialize our return variable. */
7009 *merge_sources_p = apr_array_make(result_pool, 1, sizeof(merge_source_t *));
7010
7011 /* No ranges to merge? No problem. */
7012 if (merge_range_ts->nelts == 0)
7013 return SVN_NO_ERROR;
7014
7015 /* Find the extremes of the revisions across our set of ranges. */
7016 merge_range_find_extremes(&oldest_requested, &youngest_requested,
7017 merge_range_ts);
7018
7019 /* ### FIXME: Our underlying APIs can't yet handle the case where
7020 the peg revision isn't the youngest of the three revisions. So
7021 we'll just verify that the source in the peg revision is related
7022 to the source in the youngest requested revision (which is
7023 all the underlying APIs would do in this case right now anyway). */
7024 if (source_peg_revnum < youngest_requested)
7025 {
7026 svn_client__pathrev_t *start_loc;
7027
7028 SVN_ERR(svn_client__repos_location(&start_loc,
7029 ra_session, source_loc,
7030 youngest_requested,
7031 ctx, scratch_pool, scratch_pool));
7032 source_peg_revnum = youngest_requested;
7033 }
7034
7035 /* Fetch the locations for our merge range span. */
7036 SVN_ERR(svn_client__repos_location_segments(&segments,
7037 ra_session, source_loc->url,
7038 source_peg_revnum,
7039 youngest_requested,
7040 oldest_requested,
7041 ctx, result_pool));
7042
7043 /* See if we fetched enough history to do the job. "Surely we did,"
7044 you say. "After all, we covered the entire requested merge
7045 range." Yes, that's true, but if our first segment doesn't
7046 extend back to the oldest request revision, we've got a special
7047 case to deal with. Or if the first segment represents a gap,
7048 that's another special case. */
7049 trim_revision = SVN_INVALID_REVNUM;
7050 if (segments->nelts)
7051 {
7052 svn_location_segment_t *first_segment =
7053 APR_ARRAY_IDX(segments, 0, svn_location_segment_t *);
7054
7055 /* If the first segment doesn't start with the OLDEST_REQUESTED
7056 revision, we'll need to pass a trim revision to our range
7057 cruncher. */
7058 if (first_segment->range_start != oldest_requested)
7059 {
7060 trim_revision = first_segment->range_start;
7061 }
7062
7063 /* Else, if the first segment has no path (and therefore is a
7064 gap), then we'll fetch the copy source revision from the
7065 second segment (provided there is one, of course) and use it
7066 to prepend an extra pathful segment to our list.
7067
7068 ### We could avoid this bit entirely if we'd passed
7069 ### SVN_INVALID_REVNUM instead of OLDEST_REQUESTED to
7070 ### svn_client__repos_location_segments(), but that would
7071 ### really penalize clients hitting pre-1.5 repositories with
7072 ### the typical small merge range request (because of the
7073 ### lack of a node-origins cache in the repository). */
7074 else if (! first_segment->path)
7075 {
7076 if (segments->nelts > 1)
7077 {
7078 svn_location_segment_t *second_segment =
7079 APR_ARRAY_IDX(segments, 1, svn_location_segment_t *);
7080 const char *segment_url;
7081 const char *original_repos_relpath;
7082 svn_revnum_t original_revision;
7083 svn_opt_revision_t range_start_rev;
7084 range_start_rev.kind = svn_opt_revision_number;
7085 range_start_rev.value.number = second_segment->range_start;
7086
7087 segment_url = svn_path_url_add_component2(
7088 source_loc->repos_root_url, second_segment->path,
7089 scratch_pool);
7090 SVN_ERR(svn_client__get_copy_source(&original_repos_relpath,
7091 &original_revision,
7092 segment_url,
7093 &range_start_rev, ctx,
7094 result_pool, scratch_pool));
7095 /* Got copyfrom data? Fix up the first segment to cover
7096 back to COPYFROM_REV + 1, and then prepend a new
7097 segment covering just COPYFROM_REV. */
7098 if (original_repos_relpath)
7099 {
7100 svn_location_segment_t *new_segment =
7101 apr_pcalloc(result_pool, sizeof(*new_segment));
7102
7103 new_segment->path = original_repos_relpath;
7104 new_segment->range_start = original_revision;
7105 new_segment->range_end = original_revision;
7106 svn_sort__array_insert(&new_segment, segments, 0);
7107 }
7108 }
7109 }
7110 }
7111
7112 /* For each range in our requested range set, try to determine the
7113 path(s) associated with that range. */
7114 for (i = 0; i < merge_range_ts->nelts; i++)
7115 {
7116 svn_merge_range_t *range =
7117 APR_ARRAY_IDX(merge_range_ts, i, svn_merge_range_t *);
7118 apr_array_header_t *merge_sources;
7119
7120 if (SVN_IS_VALID_REVNUM(trim_revision))
7121 {
7122 /* If the range predates the trim revision, discard it. */
7123 if (MAX(range->start, range->end) < trim_revision)
7124 continue;
7125
7126 /* If the range overlaps the trim revision, trim it. */
7127 if (range->start < trim_revision)
7128 range->start = trim_revision;
7129 if (range->end < trim_revision)
7130 range->end = trim_revision;
7131 }
7132
7133 /* Copy the resulting merge sources into master list thereof. */
7134 SVN_ERR(combine_range_with_segments(&merge_sources, range,
7135 segments, source_loc,
7136 result_pool));
7137 apr_array_cat(*merge_sources_p, merge_sources);
7138 }
7139
7140 return SVN_NO_ERROR;
7141 }
7142
7143 /* Determine the normalized ranges to merge from a given line of history.
7144
7145 Calculate the result by intersecting the list of location segments at
7146 which SOURCE_LOC existed along its line of history with the requested
7147 revision ranges in RANGES_TO_MERGE. RANGES_TO_MERGE is an array of
7148 (svn_opt_revision_range_t *) revision ranges. Use SOURCE_PATH_OR_URL to
7149 resolve any WC-relative revision specifiers (such as 'base') in
7150 RANGES_TO_MERGE.
7151
7152 Set *MERGE_SOURCES_P to an array of merge_source_t * objects, each
7153 describing a normalized range of revisions to be merged from the line
7154 history of SOURCE_LOC. Order the objects from oldest to youngest.
7155
7156 RA_SESSION is an RA session open to the repository of SOURCE_LOC; it may
7157 be temporarily reparented within this function. Use RA_SESSION to find
7158 the location segments along the line of history of SOURCE_LOC.
7159
7160 Allocate MERGE_SOURCES_P and its contents in RESULT_POOL.
7161
7162 See `MERGEINFO MERGE SOURCE NORMALIZATION' for more on the
7163 background of this function.
7164 */
7165 static svn_error_t *
normalize_merge_sources(apr_array_header_t ** merge_sources_p,const char * source_path_or_url,const svn_client__pathrev_t * source_loc,const apr_array_header_t * ranges_to_merge,svn_ra_session_t * ra_session,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)7166 normalize_merge_sources(apr_array_header_t **merge_sources_p,
7167 const char *source_path_or_url,
7168 const svn_client__pathrev_t *source_loc,
7169 const apr_array_header_t *ranges_to_merge,
7170 svn_ra_session_t *ra_session,
7171 svn_client_ctx_t *ctx,
7172 apr_pool_t *result_pool,
7173 apr_pool_t *scratch_pool)
7174 {
7175 const char *source_abspath_or_url;
7176 svn_revnum_t youngest_rev = SVN_INVALID_REVNUM;
7177 svn_rangelist_t *merge_range_ts;
7178 int i;
7179 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
7180
7181 if(!svn_path_is_url(source_path_or_url))
7182 SVN_ERR(svn_dirent_get_absolute(&source_abspath_or_url, source_path_or_url,
7183 scratch_pool));
7184 else
7185 source_abspath_or_url = source_path_or_url;
7186
7187 /* Create a list to hold svn_merge_range_t's. */
7188 merge_range_ts = apr_array_make(scratch_pool, ranges_to_merge->nelts,
7189 sizeof(svn_merge_range_t *));
7190
7191 for (i = 0; i < ranges_to_merge->nelts; i++)
7192 {
7193 svn_opt_revision_range_t *range
7194 = APR_ARRAY_IDX(ranges_to_merge, i, svn_opt_revision_range_t *);
7195 svn_merge_range_t mrange;
7196
7197 svn_pool_clear(iterpool);
7198
7199 /* Resolve revisions to real numbers, validating as we go. */
7200 if ((range->start.kind == svn_opt_revision_unspecified)
7201 || (range->end.kind == svn_opt_revision_unspecified))
7202 return svn_error_create(SVN_ERR_CLIENT_BAD_REVISION, NULL,
7203 _("Not all required revisions are specified"));
7204
7205 SVN_ERR(svn_client__get_revision_number(&mrange.start, &youngest_rev,
7206 ctx->wc_ctx,
7207 source_abspath_or_url,
7208 ra_session, &range->start,
7209 iterpool));
7210 SVN_ERR(svn_client__get_revision_number(&mrange.end, &youngest_rev,
7211 ctx->wc_ctx,
7212 source_abspath_or_url,
7213 ra_session, &range->end,
7214 iterpool));
7215
7216 /* If this isn't a no-op range... */
7217 if (mrange.start != mrange.end)
7218 {
7219 /* ...then add it to the list. */
7220 mrange.inheritable = TRUE;
7221 APR_ARRAY_PUSH(merge_range_ts, svn_merge_range_t *)
7222 = svn_merge_range_dup(&mrange, scratch_pool);
7223 }
7224 }
7225
7226 SVN_ERR(normalize_merge_sources_internal(
7227 merge_sources_p, source_loc,
7228 merge_range_ts, ra_session, ctx, result_pool, scratch_pool));
7229
7230 svn_pool_destroy(iterpool);
7231 return SVN_NO_ERROR;
7232 }
7233
7234
7235 /*-----------------------------------------------------------------------*/
7236
7237 /*** Merge Workhorse Functions ***/
7238
7239 /* Helper for do_directory_merge() and do_file_merge() which filters out a
7240 path's own natural history from the mergeinfo describing a merge.
7241
7242 Given the natural history IMPLICIT_MERGEINFO of some wc merge target path,
7243 the repository-relative merge source path SOURCE_REL_PATH, and the
7244 requested merge range REQUESTED_RANGE from SOURCE_REL_PATH, remove any
7245 portion of REQUESTED_RANGE which is already described in
7246 IMPLICIT_MERGEINFO. Store the result in *FILTERED_RANGELIST.
7247
7248 This function only filters natural history for mergeinfo that will be
7249 *added* during a forward merge. Removing natural history from explicit
7250 mergeinfo is harmless. If REQUESTED_RANGE describes a reverse merge,
7251 then *FILTERED_RANGELIST is simply populated with one range described
7252 by REQUESTED_RANGE. *FILTERED_RANGELIST is never NULL.
7253
7254 Allocate *FILTERED_RANGELIST in POOL. */
7255 static svn_error_t *
filter_natural_history_from_mergeinfo(svn_rangelist_t ** filtered_rangelist,const char * source_rel_path,svn_mergeinfo_t implicit_mergeinfo,svn_merge_range_t * requested_range,apr_pool_t * pool)7256 filter_natural_history_from_mergeinfo(svn_rangelist_t **filtered_rangelist,
7257 const char *source_rel_path,
7258 svn_mergeinfo_t implicit_mergeinfo,
7259 svn_merge_range_t *requested_range,
7260 apr_pool_t *pool)
7261 {
7262 /* Make the REQUESTED_RANGE into a rangelist. */
7263 svn_rangelist_t *requested_rangelist =
7264 svn_rangelist__initialize(requested_range->start, requested_range->end,
7265 requested_range->inheritable, pool);
7266
7267 *filtered_rangelist = NULL;
7268
7269 /* For forward merges: If the IMPLICIT_MERGEINFO already describes ranges
7270 associated with SOURCE_REL_PATH then filter those ranges out. */
7271 if (implicit_mergeinfo
7272 && (requested_range->start < requested_range->end))
7273 {
7274 svn_rangelist_t *implied_rangelist =
7275 svn_hash_gets(implicit_mergeinfo, source_rel_path);
7276
7277 if (implied_rangelist)
7278 SVN_ERR(svn_rangelist_remove(filtered_rangelist,
7279 implied_rangelist,
7280 requested_rangelist,
7281 FALSE, pool));
7282 }
7283
7284 /* If no filtering was performed the filtered rangelist is
7285 simply the requested rangelist.*/
7286 if (! (*filtered_rangelist))
7287 *filtered_rangelist = requested_rangelist;
7288
7289 return SVN_NO_ERROR;
7290 }
7291
7292 /* Return a merge source representing the sub-range from START_REV to
7293 END_REV of SOURCE. SOURCE obeys the rules described in the
7294 'MERGEINFO MERGE SOURCE NORMALIZATION' comment at the top of this file.
7295 The younger of START_REV and END_REV is inclusive while the older is
7296 exclusive.
7297
7298 Allocate the result structure in POOL but leave the URLs in it as shallow
7299 copies of the URLs in SOURCE.
7300 */
7301 static merge_source_t *
subrange_source(const merge_source_t * source,svn_revnum_t start_rev,svn_revnum_t end_rev,apr_pool_t * pool)7302 subrange_source(const merge_source_t *source,
7303 svn_revnum_t start_rev,
7304 svn_revnum_t end_rev,
7305 apr_pool_t *pool)
7306 {
7307 svn_boolean_t is_rollback = (source->loc1->rev > source->loc2->rev);
7308 svn_boolean_t same_urls = (strcmp(source->loc1->url, source->loc2->url) == 0);
7309 svn_client__pathrev_t loc1 = *source->loc1;
7310 svn_client__pathrev_t loc2 = *source->loc2;
7311
7312 /* For this function we require that the input source is 'ancestral'. */
7313 SVN_ERR_ASSERT_NO_RETURN(source->ancestral);
7314 SVN_ERR_ASSERT_NO_RETURN(start_rev != end_rev);
7315
7316 loc1.rev = start_rev;
7317 loc2.rev = end_rev;
7318 if (! same_urls)
7319 {
7320 if (is_rollback && (end_rev != source->loc2->rev))
7321 {
7322 loc2.url = source->loc1->url;
7323 }
7324 if ((! is_rollback) && (start_rev != source->loc1->rev))
7325 {
7326 loc1.url = source->loc2->url;
7327 }
7328 }
7329 return merge_source_create(&loc1, &loc2, source->ancestral, pool);
7330 }
7331
7332 /* The single-file, simplified version of do_directory_merge(), which see for
7333 parameter descriptions.
7334
7335 Additional parameters:
7336
7337 If SOURCES_RELATED is set, the "left" and "right" sides of SOURCE are
7338 historically related (ancestors, uncles, second
7339 cousins thrice removed, etc...). (This is used to simulate the
7340 history checks that the repository logic does in the directory case.)
7341
7342 If mergeinfo is being recorded to describe this merge, and RESULT_CATALOG
7343 is not NULL, then don't record the new mergeinfo on the TARGET_ABSPATH,
7344 but instead record it in RESULT_CATALOG, where the key is TARGET_ABSPATH
7345 and the value is the new mergeinfo for that path. Allocate additions
7346 to RESULT_CATALOG in pool which RESULT_CATALOG was created in.
7347
7348 CONFLICTED_RANGE is as documented for do_directory_merge().
7349
7350 Note: MERGE_B->RA_SESSION1 must be associated with SOURCE->loc1->url and
7351 MERGE_B->RA_SESSION2 with SOURCE->loc2->url.
7352 */
7353 static svn_error_t *
do_file_merge(svn_mergeinfo_catalog_t result_catalog,single_range_conflict_report_t ** conflict_report,const merge_source_t * source,const char * target_abspath,const svn_diff_tree_processor_t * processor,svn_boolean_t sources_related,svn_boolean_t squelch_mergeinfo_notifications,merge_cmd_baton_t * merge_b,apr_pool_t * result_pool,apr_pool_t * scratch_pool)7354 do_file_merge(svn_mergeinfo_catalog_t result_catalog,
7355 single_range_conflict_report_t **conflict_report,
7356 const merge_source_t *source,
7357 const char *target_abspath,
7358 const svn_diff_tree_processor_t *processor,
7359 svn_boolean_t sources_related,
7360 svn_boolean_t squelch_mergeinfo_notifications,
7361 merge_cmd_baton_t *merge_b,
7362 apr_pool_t *result_pool,
7363 apr_pool_t *scratch_pool)
7364 {
7365 svn_rangelist_t *remaining_ranges;
7366 svn_client_ctx_t *ctx = merge_b->ctx;
7367 svn_merge_range_t range;
7368 svn_mergeinfo_t target_mergeinfo;
7369 svn_boolean_t inherited = FALSE;
7370 svn_boolean_t is_rollback = (source->loc1->rev > source->loc2->rev);
7371 const svn_client__pathrev_t *primary_src
7372 = is_rollback ? source->loc1 : source->loc2;
7373 svn_boolean_t honor_mergeinfo = HONOR_MERGEINFO(merge_b);
7374 svn_client__merge_path_t *merge_target = NULL;
7375 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
7376
7377 SVN_ERR_ASSERT(svn_dirent_is_absolute(target_abspath));
7378
7379 *conflict_report = NULL;
7380
7381 /* Note that this is a single-file merge. */
7382 range.start = source->loc1->rev;
7383 range.end = source->loc2->rev;
7384 range.inheritable = TRUE;
7385
7386 merge_target = svn_client__merge_path_create(target_abspath, scratch_pool);
7387
7388 if (honor_mergeinfo)
7389 {
7390 svn_error_t *err;
7391
7392 /* Fetch mergeinfo. */
7393 err = get_full_mergeinfo(&target_mergeinfo,
7394 &(merge_target->implicit_mergeinfo),
7395 &inherited, svn_mergeinfo_inherited,
7396 merge_b->ra_session1, target_abspath,
7397 MAX(source->loc1->rev, source->loc2->rev),
7398 MIN(source->loc1->rev, source->loc2->rev),
7399 ctx, scratch_pool, iterpool);
7400
7401 if (err)
7402 {
7403 if (err->apr_err == SVN_ERR_MERGEINFO_PARSE_ERROR)
7404 {
7405 err = svn_error_createf(
7406 SVN_ERR_CLIENT_INVALID_MERGEINFO_NO_MERGETRACKING, err,
7407 _("Invalid mergeinfo detected on merge target '%s', "
7408 "merge tracking not possible"),
7409 svn_dirent_local_style(target_abspath, scratch_pool));
7410 }
7411 return svn_error_trace(err);
7412 }
7413
7414 /* Calculate remaining merges unless this is a record only merge.
7415 In that case the remaining range is the whole range described
7416 by SOURCE->rev1:rev2. */
7417 if (!merge_b->record_only)
7418 {
7419 /* ### Bug? calculate_remaining_ranges() needs 'source' to adhere
7420 * to the requirements of 'MERGEINFO MERGE SOURCE NORMALIZATION'
7421 * here, but it doesn't appear to be guaranteed so. */
7422 SVN_ERR(calculate_remaining_ranges(NULL, merge_target,
7423 source,
7424 target_mergeinfo,
7425 merge_b->implicit_src_gap, FALSE,
7426 merge_b->ra_session1,
7427 ctx, scratch_pool,
7428 iterpool));
7429 remaining_ranges = merge_target->remaining_ranges;
7430
7431 /* We are honoring mergeinfo and this is not a simple record only
7432 merge which blindly records mergeinfo describing the merge of
7433 SOURCE->LOC1->URL@SOURCE->LOC1->REV through
7434 SOURCE->LOC2->URL@SOURCE->LOC2->REV. This means that the oldest
7435 and youngest revisions merged (as determined above by
7436 calculate_remaining_ranges) might differ from those described
7437 in SOURCE. To keep the '--- Merging *' notifications consistent
7438 with the '--- Recording mergeinfo *' notifications, we adjust
7439 RANGE to account for such changes. */
7440 if (remaining_ranges->nelts)
7441 {
7442 svn_merge_range_t *adj_start_range =
7443 APR_ARRAY_IDX(remaining_ranges, 0, svn_merge_range_t *);
7444 svn_merge_range_t *adj_end_range =
7445 APR_ARRAY_IDX(remaining_ranges, remaining_ranges->nelts - 1,
7446 svn_merge_range_t *);
7447 range.start = adj_start_range->start;
7448 range.end = adj_end_range->end;
7449 }
7450 }
7451 }
7452
7453 /* The simple cases where our remaining range is SOURCE->rev1:rev2. */
7454 if (!honor_mergeinfo || merge_b->record_only)
7455 {
7456 remaining_ranges = apr_array_make(scratch_pool, 1, sizeof(&range));
7457 APR_ARRAY_PUSH(remaining_ranges, svn_merge_range_t *) = ⦥
7458 }
7459
7460 if (!merge_b->record_only)
7461 {
7462 svn_rangelist_t *ranges_to_merge = apr_array_copy(scratch_pool,
7463 remaining_ranges);
7464 const char *target_relpath = ""; /* relative to root of merge */
7465
7466 if (source->ancestral)
7467 {
7468 apr_array_header_t *child_with_mergeinfo;
7469 svn_client__merge_path_t *target_info;
7470
7471 /* If we have ancestrally related sources and more than one
7472 range to merge, eliminate no-op ranges before going through
7473 the effort of downloading the many copies of the file
7474 required to do these merges (two copies per range). */
7475 if (remaining_ranges->nelts > 1)
7476 {
7477 const char *old_sess_url;
7478 svn_error_t *err;
7479
7480 SVN_ERR(svn_client__ensure_ra_session_url(&old_sess_url,
7481 merge_b->ra_session1,
7482 primary_src->url,
7483 iterpool));
7484 err = remove_noop_merge_ranges(&ranges_to_merge,
7485 merge_b->ra_session1,
7486 remaining_ranges, scratch_pool);
7487 SVN_ERR(svn_error_compose_create(
7488 err, svn_ra_reparent(merge_b->ra_session1,
7489 old_sess_url, iterpool)));
7490 }
7491
7492 /* To support notify_merge_begin() initialize our
7493 CHILD_WITH_MERGEINFO. See the comment
7494 'THE CHILDREN_WITH_MERGEINFO ARRAY' at the start of this file. */
7495
7496 child_with_mergeinfo = apr_array_make(scratch_pool, 1,
7497 sizeof(svn_client__merge_path_t *));
7498
7499 /* ### Create a fake copy of merge_target as we don't keep
7500 remaining_ranges in sync (yet). */
7501 target_info = apr_pcalloc(scratch_pool, sizeof(*target_info));
7502
7503 target_info->abspath = merge_target->abspath;
7504 target_info->remaining_ranges = ranges_to_merge;
7505
7506 APR_ARRAY_PUSH(child_with_mergeinfo, svn_client__merge_path_t *)
7507 = target_info;
7508
7509 /* And store in baton to allow using it from notify_merge_begin() */
7510 merge_b->notify_begin.nodes_with_mergeinfo = child_with_mergeinfo;
7511 }
7512
7513 while (ranges_to_merge->nelts > 0)
7514 {
7515 svn_merge_range_t *r = APR_ARRAY_IDX(ranges_to_merge, 0,
7516 svn_merge_range_t *);
7517 const merge_source_t *real_source;
7518 const char *left_file, *right_file;
7519 apr_hash_t *left_props, *right_props;
7520 const svn_diff_source_t *left_source;
7521 const svn_diff_source_t *right_source;
7522
7523 svn_pool_clear(iterpool);
7524
7525 /* Ensure any subsequent drives gets their own notification. */
7526 merge_b->notify_begin.last_abspath = NULL;
7527
7528 /* While we currently don't allow it, in theory we could be
7529 fetching two fulltexts from two different repositories here. */
7530 if (source->ancestral)
7531 real_source = subrange_source(source, r->start, r->end, iterpool);
7532 else
7533 real_source = source;
7534 SVN_ERR(single_file_merge_get_file(&left_file, &left_props,
7535 merge_b->ra_session1,
7536 real_source->loc1,
7537 target_abspath,
7538 iterpool, iterpool));
7539 SVN_ERR(single_file_merge_get_file(&right_file, &right_props,
7540 merge_b->ra_session2,
7541 real_source->loc2,
7542 target_abspath,
7543 iterpool, iterpool));
7544 /* Calculate sources for the diff processor */
7545 left_source = svn_diff__source_create(r->start, iterpool);
7546 right_source = svn_diff__source_create(r->end, iterpool);
7547
7548
7549 /* If the sources are related or we're ignoring ancestry in diffs,
7550 do a text-n-props merge; otherwise, do a delete-n-add merge. */
7551 if (! (merge_b->diff_ignore_ancestry || sources_related))
7552 {
7553 struct merge_dir_baton_t dir_baton;
7554 void *file_baton;
7555 svn_boolean_t skip;
7556
7557 /* Initialize minimal dir baton to allow calculating 'R'eplace
7558 from 'D'elete + 'A'dd. */
7559
7560 memset(&dir_baton, 0, sizeof(dir_baton));
7561 dir_baton.pool = iterpool;
7562 dir_baton.tree_conflict_reason = CONFLICT_REASON_NONE;
7563 dir_baton.tree_conflict_action = svn_wc_conflict_action_edit;
7564 dir_baton.skip_reason = svn_wc_notify_state_unknown;
7565
7566 /* Delete... */
7567 file_baton = NULL;
7568 skip = FALSE;
7569 SVN_ERR(processor->file_opened(&file_baton, &skip, target_relpath,
7570 left_source,
7571 NULL /* right_source */,
7572 NULL /* copyfrom_source */,
7573 &dir_baton,
7574 processor,
7575 iterpool, iterpool));
7576 if (! skip)
7577 SVN_ERR(processor->file_deleted(target_relpath,
7578 left_source,
7579 left_file,
7580 left_props,
7581 file_baton,
7582 processor,
7583 iterpool));
7584
7585 /* ...plus add... */
7586 file_baton = NULL;
7587 skip = FALSE;
7588 SVN_ERR(processor->file_opened(&file_baton, &skip, target_relpath,
7589 NULL /* left_source */,
7590 right_source,
7591 NULL /* copyfrom_source */,
7592 &dir_baton,
7593 processor,
7594 iterpool, iterpool));
7595 if (! skip)
7596 SVN_ERR(processor->file_added(target_relpath,
7597 NULL /* copyfrom_source */,
7598 right_source,
7599 NULL /* copyfrom_file */,
7600 right_file,
7601 NULL /* copyfrom_props */,
7602 right_props,
7603 file_baton,
7604 processor,
7605 iterpool));
7606 /* ... equals replace. */
7607 }
7608 else
7609 {
7610 void *file_baton = NULL;
7611 svn_boolean_t skip = FALSE;
7612 apr_array_header_t *propchanges;
7613
7614
7615 /* Deduce property diffs. */
7616 SVN_ERR(svn_prop_diffs(&propchanges, right_props, left_props,
7617 iterpool));
7618
7619 SVN_ERR(processor->file_opened(&file_baton, &skip, target_relpath,
7620 left_source,
7621 right_source,
7622 NULL /* copyfrom_source */,
7623 NULL /* dir_baton */,
7624 processor,
7625 iterpool, iterpool));
7626 if (! skip)
7627 SVN_ERR(processor->file_changed(target_relpath,
7628 left_source,
7629 right_source,
7630 left_file,
7631 right_file,
7632 left_props,
7633 right_props,
7634 TRUE /* file changed */,
7635 propchanges,
7636 file_baton,
7637 processor,
7638 iterpool));
7639 }
7640
7641 if (is_path_conflicted_by_merge(merge_b))
7642 {
7643 merge_source_t *remaining_range = NULL;
7644
7645 if (real_source->loc2->rev != source->loc2->rev)
7646 remaining_range = subrange_source(source,
7647 real_source->loc2->rev,
7648 source->loc2->rev,
7649 scratch_pool);
7650 *conflict_report = single_range_conflict_report_create(
7651 real_source, remaining_range, result_pool);
7652
7653 /* Only record partial mergeinfo if only a partial merge was
7654 performed before a conflict was encountered. */
7655 range.end = r->end;
7656 break;
7657 }
7658
7659 /* Now delete the just merged range from the hash
7660 (This list is used from notify_merge_begin)
7661
7662 Directory merges use remove_first_range_from_remaining_ranges() */
7663 svn_sort__array_delete(ranges_to_merge, 0, 1);
7664 }
7665 merge_b->notify_begin.last_abspath = NULL;
7666 } /* !merge_b->record_only */
7667
7668 /* Record updated WC mergeinfo to account for our new merges, minus
7669 any unresolved conflicts and skips. We use the original
7670 REMAINING_RANGES here because we want to record all the requested
7671 merge ranges, include the noop ones. */
7672 if (RECORD_MERGEINFO(merge_b) && remaining_ranges->nelts)
7673 {
7674 const char *mergeinfo_path = svn_client__pathrev_fspath(primary_src,
7675 scratch_pool);
7676 svn_rangelist_t *filtered_rangelist;
7677
7678 /* Filter any ranges from TARGET_WCPATH's own history, there is no
7679 need to record this explicitly in mergeinfo, it is already part
7680 of TARGET_WCPATH's natural history (implicit mergeinfo). */
7681 SVN_ERR(filter_natural_history_from_mergeinfo(
7682 &filtered_rangelist,
7683 mergeinfo_path,
7684 merge_target->implicit_mergeinfo,
7685 &range,
7686 iterpool));
7687
7688 /* Only record mergeinfo if there is something other than
7689 self-referential mergeinfo, but don't record mergeinfo if
7690 TARGET_WCPATH was skipped. */
7691 if (filtered_rangelist->nelts
7692 && (apr_hash_count(merge_b->skipped_abspaths) == 0))
7693 {
7694 apr_hash_t *merges = apr_hash_make(iterpool);
7695
7696 /* If merge target has inherited mergeinfo set it before
7697 recording the first merge range. */
7698 if (inherited)
7699 SVN_ERR(svn_client__record_wc_mergeinfo(target_abspath,
7700 target_mergeinfo,
7701 FALSE, ctx,
7702 iterpool));
7703
7704 svn_hash_sets(merges, target_abspath, filtered_rangelist);
7705
7706 if (!squelch_mergeinfo_notifications)
7707 {
7708 /* Notify that we are recording mergeinfo describing a merge. */
7709 svn_merge_range_t n_range;
7710
7711 SVN_ERR(svn_mergeinfo__get_range_endpoints(
7712 &n_range.end, &n_range.start, merges, iterpool));
7713 n_range.inheritable = TRUE;
7714 notify_mergeinfo_recording(target_abspath, &n_range,
7715 merge_b->ctx, iterpool);
7716 }
7717
7718 SVN_ERR(update_wc_mergeinfo(result_catalog, target_abspath,
7719 mergeinfo_path, merges, is_rollback,
7720 ctx, iterpool));
7721 }
7722 }
7723
7724 merge_b->notify_begin.nodes_with_mergeinfo = NULL;
7725
7726 svn_pool_destroy(iterpool);
7727
7728 return SVN_NO_ERROR;
7729 }
7730
7731 /* Helper for do_directory_merge() to handle the case where a merge editor
7732 drive adds explicit mergeinfo to a path which didn't have any explicit
7733 mergeinfo previously.
7734
7735 MERGE_B is cascaded from the argument of the same
7736 name in do_directory_merge(). Should be called only after
7737 do_directory_merge() has called populate_remaining_ranges() and populated
7738 the remaining_ranges field of each child in
7739 CHILDREN_WITH_MERGEINFO (i.e. the remaining_ranges fields can be
7740 empty but never NULL).
7741
7742 If MERGE_B->DRY_RUN is true do nothing, if it is false then
7743 for each path (if any) in MERGE_B->PATHS_WITH_NEW_MERGEINFO merge that
7744 path's inherited mergeinfo (if any) with its working explicit mergeinfo
7745 and set that as the path's new explicit mergeinfo. Then add an
7746 svn_client__merge_path_t * element representing the path to
7747 CHILDREN_WITH_MERGEINFO if it isn't already present. All fields
7748 in any elements added to CHILDREN_WITH_MERGEINFO are initialized
7749 to FALSE/NULL with the exception of 'path' and 'remaining_ranges'. The
7750 latter is set to a rangelist equal to the remaining_ranges of the path's
7751 nearest path-wise ancestor in CHILDREN_WITH_MERGEINFO.
7752
7753 Any elements added to CHILDREN_WITH_MERGEINFO are allocated
7754 in POOL. */
7755 static svn_error_t *
process_children_with_new_mergeinfo(merge_cmd_baton_t * merge_b,apr_array_header_t * children_with_mergeinfo,apr_pool_t * pool)7756 process_children_with_new_mergeinfo(merge_cmd_baton_t *merge_b,
7757 apr_array_header_t *children_with_mergeinfo,
7758 apr_pool_t *pool)
7759 {
7760 apr_pool_t *iterpool;
7761 apr_hash_index_t *hi;
7762
7763 if (!merge_b->paths_with_new_mergeinfo || merge_b->dry_run)
7764 return SVN_NO_ERROR;
7765
7766 /* Iterate over each path with explicit mergeinfo added by the merge. */
7767 iterpool = svn_pool_create(pool);
7768 for (hi = apr_hash_first(pool, merge_b->paths_with_new_mergeinfo);
7769 hi;
7770 hi = apr_hash_next(hi))
7771 {
7772 const char *abspath_with_new_mergeinfo = svn__apr_hash_index_key(hi);
7773 svn_mergeinfo_t path_inherited_mergeinfo;
7774 svn_mergeinfo_t path_explicit_mergeinfo;
7775 svn_client__merge_path_t *new_child;
7776
7777 svn_pool_clear(iterpool);
7778
7779 /* Note: We could skip recording inherited mergeinfo here if this path
7780 was added (with preexisting mergeinfo) by the merge. That's actually
7781 more correct, since the inherited mergeinfo likely describes
7782 non-existent or unrelated merge history, but it's not quite so simple
7783 as that, see http://subversion.tigris.org/issues/show_bug.cgi?id=4309
7784 */
7785
7786 /* Get the path's new explicit mergeinfo... */
7787 SVN_ERR(svn_client__get_wc_mergeinfo(&path_explicit_mergeinfo, NULL,
7788 svn_mergeinfo_explicit,
7789 abspath_with_new_mergeinfo,
7790 NULL, NULL, FALSE,
7791 merge_b->ctx,
7792 iterpool, iterpool));
7793 /* ...there *should* always be explicit mergeinfo at this point
7794 but you can't be too careful. */
7795 if (path_explicit_mergeinfo)
7796 {
7797 /* Get the mergeinfo the path would have inherited before
7798 the merge. */
7799 SVN_ERR(svn_client__get_wc_or_repos_mergeinfo(
7800 &path_inherited_mergeinfo,
7801 NULL, NULL,
7802 FALSE,
7803 svn_mergeinfo_nearest_ancestor, /* We only want inherited MI */
7804 merge_b->ra_session2,
7805 abspath_with_new_mergeinfo,
7806 merge_b->ctx,
7807 iterpool));
7808
7809 /* If the path inherited any mergeinfo then merge that with the
7810 explicit mergeinfo and record the result as the path's new
7811 explicit mergeinfo. */
7812 if (path_inherited_mergeinfo)
7813 {
7814 SVN_ERR(svn_mergeinfo_merge2(path_explicit_mergeinfo,
7815 path_inherited_mergeinfo,
7816 iterpool, iterpool));
7817 SVN_ERR(svn_client__record_wc_mergeinfo(
7818 abspath_with_new_mergeinfo,
7819 path_explicit_mergeinfo,
7820 FALSE, merge_b->ctx, iterpool));
7821 }
7822
7823 /* If the path is not in CHILDREN_WITH_MERGEINFO then add it. */
7824 new_child =
7825 get_child_with_mergeinfo(children_with_mergeinfo,
7826 abspath_with_new_mergeinfo);
7827 if (!new_child)
7828 {
7829 const svn_client__merge_path_t *parent
7830 = find_nearest_ancestor(children_with_mergeinfo,
7831 FALSE, abspath_with_new_mergeinfo);
7832 new_child
7833 = svn_client__merge_path_create(abspath_with_new_mergeinfo,
7834 pool);
7835
7836 /* If path_with_new_mergeinfo is the merge target itself
7837 then it should already be in
7838 CHILDREN_WITH_MERGEINFO per the criteria of
7839 get_mergeinfo_paths() and we shouldn't be in this block.
7840 If path_with_new_mergeinfo is a subtree then it must have
7841 a parent in CHILDREN_WITH_MERGEINFO if only
7842 the merge target itself...so if we don't find a parent
7843 the caller has done something quite wrong. */
7844 SVN_ERR_ASSERT(parent);
7845 SVN_ERR_ASSERT(parent->remaining_ranges);
7846
7847 /* Set the path's remaining_ranges equal to its parent's. */
7848 new_child->remaining_ranges = svn_rangelist_dup(
7849 parent->remaining_ranges, pool);
7850 insert_child_to_merge(children_with_mergeinfo, new_child, pool);
7851 }
7852 }
7853 }
7854 svn_pool_destroy(iterpool);
7855
7856 return SVN_NO_ERROR;
7857 }
7858
7859 /* Return true if any path in SUBTREES is equal to, or is a subtree of,
7860 LOCAL_ABSPATH. Return false otherwise. The keys of SUBTREES are
7861 (const char *) absolute paths and its values are irrelevant.
7862 If SUBTREES is NULL return false. */
7863 static svn_boolean_t
path_is_subtree(const char * local_abspath,apr_hash_t * subtrees,apr_pool_t * pool)7864 path_is_subtree(const char *local_abspath,
7865 apr_hash_t *subtrees,
7866 apr_pool_t *pool)
7867 {
7868 if (subtrees)
7869 {
7870 apr_hash_index_t *hi;
7871
7872 for (hi = apr_hash_first(pool, subtrees);
7873 hi; hi = apr_hash_next(hi))
7874 {
7875 const char *path_touched_by_merge = svn__apr_hash_index_key(hi);
7876 if (svn_dirent_is_ancestor(local_abspath, path_touched_by_merge))
7877 return TRUE;
7878 }
7879 }
7880 return FALSE;
7881 }
7882
7883 /* Return true if any merged, skipped, added or tree-conflicted path
7884 recorded in MERGE_B is equal to, or is a subtree of LOCAL_ABSPATH. Return
7885 false otherwise.
7886
7887 ### Why not text- or prop-conflicted paths? Are such paths guaranteed
7888 to be recorded as 'merged' or 'skipped' or 'added', perhaps?
7889 */
7890 static svn_boolean_t
subtree_touched_by_merge(const char * local_abspath,merge_cmd_baton_t * merge_b,apr_pool_t * pool)7891 subtree_touched_by_merge(const char *local_abspath,
7892 merge_cmd_baton_t *merge_b,
7893 apr_pool_t *pool)
7894 {
7895 return (path_is_subtree(local_abspath, merge_b->merged_abspaths, pool)
7896 || path_is_subtree(local_abspath, merge_b->skipped_abspaths, pool)
7897 || path_is_subtree(local_abspath, merge_b->added_abspaths, pool)
7898 || path_is_subtree(local_abspath, merge_b->tree_conflicted_abspaths,
7899 pool));
7900 }
7901
7902 /* Helper for do_directory_merge() when performing mergeinfo unaware merges.
7903
7904 Merge the SOURCE diff into TARGET_DIR_WCPATH.
7905
7906 SOURCE, DEPTH, NOTIFY_B, and MERGE_B
7907 are all cascaded from do_directory_merge's arguments of the same names.
7908
7909 CONFLICT_REPORT is as documented for do_directory_merge().
7910
7911 NOTE: This is a very thin wrapper around drive_merge_report_editor() and
7912 exists only to populate CHILDREN_WITH_MERGEINFO with the single element
7913 expected during mergeinfo unaware merges.
7914 */
7915 static svn_error_t *
do_mergeinfo_unaware_dir_merge(single_range_conflict_report_t ** conflict_report,const merge_source_t * source,const char * target_dir_wcpath,apr_array_header_t * children_with_mergeinfo,const svn_diff_tree_processor_t * processor,svn_depth_t depth,merge_cmd_baton_t * merge_b,apr_pool_t * result_pool,apr_pool_t * scratch_pool)7916 do_mergeinfo_unaware_dir_merge(single_range_conflict_report_t **conflict_report,
7917 const merge_source_t *source,
7918 const char *target_dir_wcpath,
7919 apr_array_header_t *children_with_mergeinfo,
7920 const svn_diff_tree_processor_t *processor,
7921 svn_depth_t depth,
7922 merge_cmd_baton_t *merge_b,
7923 apr_pool_t *result_pool,
7924 apr_pool_t *scratch_pool)
7925 {
7926 /* Initialize CHILDREN_WITH_MERGEINFO and populate it with
7927 one element describing the merge of SOURCE->rev1:rev2 to
7928 TARGET_DIR_WCPATH. */
7929 svn_client__merge_path_t *item
7930 = svn_client__merge_path_create(target_dir_wcpath, scratch_pool);
7931
7932 *conflict_report = NULL;
7933 item->remaining_ranges = svn_rangelist__initialize(source->loc1->rev,
7934 source->loc2->rev,
7935 TRUE, scratch_pool);
7936 APR_ARRAY_PUSH(children_with_mergeinfo,
7937 svn_client__merge_path_t *) = item;
7938 SVN_ERR(drive_merge_report_editor(target_dir_wcpath,
7939 source,
7940 NULL, processor, depth,
7941 merge_b, scratch_pool));
7942 if (is_path_conflicted_by_merge(merge_b))
7943 {
7944 *conflict_report = single_range_conflict_report_create(
7945 source, NULL, result_pool);
7946 }
7947 return SVN_NO_ERROR;
7948 }
7949
7950 /* A svn_log_entry_receiver_t baton for log_find_operative_subtree_revs(). */
7951 typedef struct log_find_operative_subtree_baton_t
7952 {
7953 /* Mapping of const char * absolute working copy paths to those
7954 path's const char * repos absolute paths. */
7955 apr_hash_t *operative_children;
7956
7957 /* As per the arguments of the same name to
7958 get_operative_immediate_children(). */
7959 const char *merge_source_fspath;
7960 const char *merge_target_abspath;
7961 svn_depth_t depth;
7962 svn_wc_context_t *wc_ctx;
7963
7964 /* A pool to allocate additions to the hashes in. */
7965 apr_pool_t *result_pool;
7966 } log_find_operative_subtree_baton_t;
7967
7968 /* A svn_log_entry_receiver_t callback for
7969 get_inoperative_immediate_children(). */
7970 static svn_error_t *
log_find_operative_subtree_revs(void * baton,svn_log_entry_t * log_entry,apr_pool_t * pool)7971 log_find_operative_subtree_revs(void *baton,
7972 svn_log_entry_t *log_entry,
7973 apr_pool_t *pool)
7974 {
7975 log_find_operative_subtree_baton_t *log_baton = baton;
7976 apr_hash_index_t *hi;
7977 apr_pool_t *iterpool;
7978
7979 /* It's possible that authz restrictions on the merge source prevent us
7980 from knowing about any of the changes for LOG_ENTRY->REVISION. */
7981 if (!log_entry->changed_paths2)
7982 return SVN_NO_ERROR;
7983
7984 iterpool = svn_pool_create(pool);
7985
7986 for (hi = apr_hash_first(pool, log_entry->changed_paths2);
7987 hi;
7988 hi = apr_hash_next(hi))
7989 {
7990 const char *path = svn__apr_hash_index_key(hi);
7991 svn_log_changed_path2_t *change = svn__apr_hash_index_val(hi);
7992
7993 {
7994 const char *child;
7995 const char *potential_child;
7996 const char *rel_path =
7997 svn_fspath__skip_ancestor(log_baton->merge_source_fspath, path);
7998
7999 /* Some affected paths might be the root of the merge source or
8000 entirely outside our subtree of interest. In either case they
8001 are not operative *immediate* children. */
8002 if (rel_path == NULL
8003 || rel_path[0] == '\0')
8004 continue;
8005
8006 svn_pool_clear(iterpool);
8007
8008 child = svn_relpath_dirname(rel_path, iterpool);
8009 if (child[0] == '\0')
8010 {
8011 /* The svn_log_changed_path2_t.node_kind members in
8012 LOG_ENTRY->CHANGED_PATHS2 may be set to
8013 svn_node_unknown, see svn_log_changed_path2_t and
8014 svn_fs_paths_changed2. In that case we check the
8015 type of the corresponding subtree in the merge
8016 target. */
8017 svn_node_kind_t node_kind;
8018
8019 if (change->node_kind == svn_node_unknown)
8020 {
8021 const char *wc_child_abspath =
8022 svn_dirent_join(log_baton->merge_target_abspath,
8023 rel_path, iterpool);
8024
8025 SVN_ERR(svn_wc_read_kind2(&node_kind, log_baton->wc_ctx,
8026 wc_child_abspath, FALSE, FALSE,
8027 iterpool));
8028 }
8029 else
8030 {
8031 node_kind = change->node_kind;
8032 }
8033
8034 /* We only care about immediate directory children if
8035 DEPTH is svn_depth_files. */
8036 if (log_baton->depth == svn_depth_files
8037 && node_kind != svn_node_dir)
8038 continue;
8039
8040 /* If depth is svn_depth_immediates, then we only care
8041 about changes to proper subtrees of PATH. If the change
8042 is to PATH itself then PATH is within the operational
8043 depth of the merge. */
8044 if (log_baton->depth == svn_depth_immediates)
8045 continue;
8046
8047 child = rel_path;
8048 }
8049
8050 potential_child = svn_dirent_join(log_baton->merge_target_abspath,
8051 child, iterpool);
8052
8053 if (change->action == 'A'
8054 || !svn_hash_gets(log_baton->operative_children,
8055 potential_child))
8056 {
8057 svn_hash_sets(log_baton->operative_children,
8058 apr_pstrdup(log_baton->result_pool,
8059 potential_child),
8060 apr_pstrdup(log_baton->result_pool, path));
8061 }
8062 }
8063 }
8064 svn_pool_destroy(iterpool);
8065 return SVN_NO_ERROR;
8066 }
8067
8068 /* Find immediate subtrees of MERGE_TARGET_ABSPATH which would have
8069 additional differences applied if record_mergeinfo_for_dir_merge() were
8070 recording mergeinfo describing a merge at svn_depth_infinity, rather
8071 than at DEPTH (which is assumed to be shallow; if
8072 DEPTH == svn_depth_infinity then this function does nothing beyond
8073 setting *OPERATIVE_CHILDREN to an empty hash).
8074
8075 MERGE_SOURCE_FSPATH is the absolute repository path of the merge
8076 source. OLDEST_REV and YOUNGEST_REV are the revisions merged from
8077 MERGE_SOURCE_FSPATH to MERGE_TARGET_ABSPATH.
8078
8079 RA_SESSION points to MERGE_SOURCE_FSPATH.
8080
8081 Set *OPERATIVE_CHILDREN to a hash (mapping const char * absolute
8082 working copy paths to those path's const char * repos absolute paths)
8083 containing all the immediate subtrees of MERGE_TARGET_ABSPATH which would
8084 have a different diff applied if MERGE_SOURCE_FSPATH
8085 -r(OLDEST_REV - 1):YOUNGEST_REV were merged to MERGE_TARGET_ABSPATH at
8086 svn_depth_infinity rather than DEPTH.
8087
8088 RESULT_POOL is used to allocate the contents of *OPERATIVE_CHILDREN.
8089 SCRATCH_POOL is used for temporary allocations. */
8090 static svn_error_t *
get_operative_immediate_children(apr_hash_t ** operative_children,const char * merge_source_fspath,svn_revnum_t oldest_rev,svn_revnum_t youngest_rev,const char * merge_target_abspath,svn_depth_t depth,svn_wc_context_t * wc_ctx,svn_ra_session_t * ra_session,apr_pool_t * result_pool,apr_pool_t * scratch_pool)8091 get_operative_immediate_children(apr_hash_t **operative_children,
8092 const char *merge_source_fspath,
8093 svn_revnum_t oldest_rev,
8094 svn_revnum_t youngest_rev,
8095 const char *merge_target_abspath,
8096 svn_depth_t depth,
8097 svn_wc_context_t *wc_ctx,
8098 svn_ra_session_t *ra_session,
8099 apr_pool_t *result_pool,
8100 apr_pool_t *scratch_pool)
8101 {
8102 log_find_operative_subtree_baton_t log_baton;
8103
8104 SVN_ERR_ASSERT(SVN_IS_VALID_REVNUM(oldest_rev));
8105 SVN_ERR_ASSERT(SVN_IS_VALID_REVNUM(youngest_rev));
8106 SVN_ERR_ASSERT(oldest_rev <= youngest_rev);
8107
8108 *operative_children = apr_hash_make(result_pool);
8109
8110 if (depth == svn_depth_infinity)
8111 return SVN_NO_ERROR;
8112
8113 /* Now remove any paths from *OPERATIVE_CHILDREN that are inoperative when
8114 merging MERGE_SOURCE_REPOS_PATH -r(OLDEST_REV - 1):YOUNGEST_REV to
8115 MERGE_TARGET_ABSPATH at --depth infinity. */
8116 log_baton.operative_children = *operative_children;
8117 log_baton.merge_source_fspath = merge_source_fspath;
8118 log_baton.merge_target_abspath = merge_target_abspath;
8119 log_baton.depth = depth;
8120 log_baton.wc_ctx = wc_ctx;
8121 log_baton.result_pool = result_pool;
8122
8123 SVN_ERR(get_log(ra_session, "", youngest_rev, oldest_rev,
8124 TRUE, /* discover_changed_paths */
8125 log_find_operative_subtree_revs,
8126 &log_baton, scratch_pool));
8127
8128 return SVN_NO_ERROR;
8129 }
8130
8131 /* Helper for record_mergeinfo_for_dir_merge(): Identify which elements of
8132 CHILDREN_WITH_MERGEINFO need new mergeinfo set to accurately
8133 describe a merge, what inheritance type such new mergeinfo should have,
8134 and what subtrees can be ignored altogether.
8135
8136 For each svn_client__merge_path_t CHILD in CHILDREN_WITH_MERGEINFO,
8137 set CHILD->RECORD_MERGEINFO and CHILD->RECORD_NONINHERITABLE to true
8138 if the subtree needs mergeinfo to describe the merge and if that
8139 mergeinfo should be non-inheritable respectively.
8140
8141 If OPERATIVE_MERGE is true, then the merge being described is operative
8142 as per subtree_touched_by_merge(). OPERATIVE_MERGE is false otherwise.
8143
8144 MERGED_RANGE, MERGEINFO_FSPATH, DEPTH, NOTIFY_B, and MERGE_B are all
8145 cascaded from record_mergeinfo_for_dir_merge's arguments of the same
8146 names.
8147
8148 SCRATCH_POOL is used for temporary allocations.
8149 */
8150 static svn_error_t *
flag_subtrees_needing_mergeinfo(svn_boolean_t operative_merge,const svn_merge_range_t * merged_range,apr_array_header_t * children_with_mergeinfo,const char * mergeinfo_fspath,svn_depth_t depth,merge_cmd_baton_t * merge_b,apr_pool_t * scratch_pool)8151 flag_subtrees_needing_mergeinfo(svn_boolean_t operative_merge,
8152 const svn_merge_range_t *merged_range,
8153 apr_array_header_t *children_with_mergeinfo,
8154 const char *mergeinfo_fspath,
8155 svn_depth_t depth,
8156 merge_cmd_baton_t *merge_b,
8157 apr_pool_t *scratch_pool)
8158 {
8159 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
8160 int i;
8161 apr_hash_t *operative_immediate_children = NULL;
8162
8163 assert(! merge_b->dry_run);
8164
8165 if (!merge_b->record_only
8166 && merged_range->start <= merged_range->end
8167 && (depth < svn_depth_infinity))
8168 SVN_ERR(get_operative_immediate_children(
8169 &operative_immediate_children,
8170 mergeinfo_fspath, merged_range->start + 1, merged_range->end,
8171 merge_b->target->abspath, depth, merge_b->ctx->wc_ctx,
8172 merge_b->ra_session1, scratch_pool, iterpool));
8173
8174 /* Issue #4056: Walk NOTIFY_B->CHILDREN_WITH_MERGEINFO reverse depth-first
8175 order. This way each child knows if it has operative missing/switched
8176 children which necessitates non-inheritable mergeinfo. */
8177 for (i = children_with_mergeinfo->nelts - 1; i >= 0; i--)
8178 {
8179 svn_client__merge_path_t *child =
8180 APR_ARRAY_IDX(children_with_mergeinfo, i,
8181 svn_client__merge_path_t *);
8182
8183 /* Can't record mergeinfo on something that isn't here. */
8184 if (child->absent)
8185 continue;
8186
8187 /* Verify that remove_children_with_deleted_mergeinfo() did its job */
8188 assert((i == 0)
8189 ||! merge_b->paths_with_deleted_mergeinfo
8190 || !svn_hash_gets(merge_b->paths_with_deleted_mergeinfo,
8191 child->abspath));
8192
8193 /* Don't record mergeinfo on skipped paths. */
8194 if (svn_hash_gets(merge_b->skipped_abspaths, child->abspath))
8195 continue;
8196
8197 /* ### ptb: Yes, we could combine the following into a single
8198 ### conditional, but clarity would suffer (even more than
8199 ### it does now). */
8200 if (i == 0)
8201 {
8202 /* Always record mergeinfo on the merge target. */
8203 child->record_mergeinfo = TRUE;
8204 }
8205 else if (merge_b->record_only && !merge_b->reintegrate_merge)
8206 {
8207 /* Always record mergeinfo for --record-only merges. */
8208 child->record_mergeinfo = TRUE;
8209 }
8210 else if (child->immediate_child_dir
8211 && !child->pre_merge_mergeinfo
8212 && operative_immediate_children
8213 && svn_hash_gets(operative_immediate_children, child->abspath))
8214 {
8215 /* We must record mergeinfo on those issue #3642 children
8216 that are operative at a greater depth. */
8217 child->record_mergeinfo = TRUE;
8218 }
8219
8220 if (operative_merge
8221 && subtree_touched_by_merge(child->abspath, merge_b, iterpool))
8222 {
8223 svn_pool_clear(iterpool);
8224
8225 /* This subtree was affected by the merge. */
8226 child->record_mergeinfo = TRUE;
8227
8228 /* Were any CHILD's missing children skipped by the merge?
8229 If not, then CHILD's missing children don't need to be
8230 considered when recording mergeinfo describing the merge. */
8231 if (! merge_b->reintegrate_merge
8232 && child->missing_child
8233 && !path_is_subtree(child->abspath,
8234 merge_b->skipped_abspaths,
8235 iterpool))
8236 {
8237 child->missing_child = FALSE;
8238 }
8239
8240 /* If CHILD has an immediate switched child or children and
8241 none of these were touched by the merge, then we don't need
8242 need to do any special handling of those switched subtrees
8243 (e.g. record non-inheritable mergeinfo) when recording
8244 mergeinfo describing the merge. */
8245 if (child->switched_child)
8246 {
8247 int j;
8248 svn_boolean_t operative_switched_child = FALSE;
8249
8250 for (j = i + 1;
8251 j < children_with_mergeinfo->nelts;
8252 j++)
8253 {
8254 svn_client__merge_path_t *potential_child =
8255 APR_ARRAY_IDX(children_with_mergeinfo, j,
8256 svn_client__merge_path_t *);
8257 if (!svn_dirent_is_ancestor(child->abspath,
8258 potential_child->abspath))
8259 break;
8260
8261 /* POTENTIAL_CHILD is a subtree of CHILD, but is it
8262 an immediate child? */
8263 if (strcmp(child->abspath,
8264 svn_dirent_dirname(potential_child->abspath,
8265 iterpool)))
8266 continue;
8267
8268 if (potential_child->switched
8269 && potential_child->record_mergeinfo)
8270 {
8271 operative_switched_child = TRUE;
8272 break;
8273 }
8274 }
8275
8276 /* Can we treat CHILD as if it has no switched children? */
8277 if (! operative_switched_child)
8278 child->switched_child = FALSE;
8279 }
8280 }
8281
8282 if (child->record_mergeinfo)
8283 {
8284 /* We need to record mergeinfo, but should that mergeinfo be
8285 non-inheritable? */
8286 svn_node_kind_t path_kind;
8287 SVN_ERR(svn_wc_read_kind2(&path_kind, merge_b->ctx->wc_ctx,
8288 child->abspath, FALSE, FALSE, iterpool));
8289
8290 /* Only directories can have non-inheritable mergeinfo. */
8291 if (path_kind == svn_node_dir)
8292 {
8293 /* There are two general cases where non-inheritable mergeinfo
8294 is required:
8295
8296 1) There merge target has missing subtrees (due to authz
8297 restrictions, switched subtrees, or a shallow working
8298 copy).
8299
8300 2) The operational depth of the merge itself is shallow. */
8301
8302 /* We've already determined the first case. */
8303 child->record_noninheritable =
8304 child->missing_child || child->switched_child;
8305
8306 /* The second case requires a bit more work. */
8307 if (i == 0)
8308 {
8309 /* If CHILD is the root of the merge target and the
8310 operational depth is empty or files, then the mere
8311 existence of operative immediate children means we
8312 must record non-inheritable mergeinfo.
8313
8314 ### What about svn_depth_immediates? In that case
8315 ### the merge target needs only normal inheritable
8316 ### mergeinfo and the target's immediate children will
8317 ### get non-inheritable mergeinfo, assuming they
8318 ### need even that. */
8319 if (depth < svn_depth_immediates
8320 && operative_immediate_children
8321 && apr_hash_count(operative_immediate_children))
8322 child->record_noninheritable = TRUE;
8323 }
8324 else if (depth == svn_depth_immediates)
8325 {
8326 /* An immediate directory child of the merge target, which
8327 was affected by a --depth=immediates merge, needs
8328 non-inheritable mergeinfo. */
8329 if (svn_hash_gets(operative_immediate_children,
8330 child->abspath))
8331 child->record_noninheritable = TRUE;
8332 }
8333 }
8334 }
8335 else /* child->record_mergeinfo */
8336 {
8337 /* If CHILD is in NOTIFY_B->CHILDREN_WITH_MERGEINFO simply
8338 because it had no explicit mergeinfo of its own at the
8339 start of the merge but is the child of of some path with
8340 non-inheritable mergeinfo, then the explicit mergeinfo it
8341 has *now* was set by get_mergeinfo_paths() -- see criteria
8342 3 in that function's doc string. So since CHILD->ABSPATH
8343 was not touched by the merge we can remove the
8344 mergeinfo. */
8345 if (child->child_of_noninheritable)
8346 SVN_ERR(svn_client__record_wc_mergeinfo(child->abspath,
8347 NULL, FALSE,
8348 merge_b->ctx,
8349 iterpool));
8350 }
8351 }
8352
8353 svn_pool_destroy(iterpool);
8354 return SVN_NO_ERROR;
8355 }
8356
8357 /* Helper for do_directory_merge().
8358
8359 If RESULT_CATALOG is NULL then record mergeinfo describing a merge of
8360 MERGED_RANGE->START:MERGED_RANGE->END from the repository relative path
8361 MERGEINFO_FSPATH to the merge target (and possibly its subtrees) described
8362 by NOTIFY_B->CHILDREN_WITH_MERGEINFO -- see the global comment
8363 'THE CHILDREN_WITH_MERGEINFO ARRAY'. Obviously this should only
8364 be called if recording mergeinfo -- see doc string for RECORD_MERGEINFO().
8365
8366 If RESULT_CATALOG is not NULL, then don't record the new mergeinfo on the
8367 WC, but instead record it in RESULT_CATALOG, where the keys are absolute
8368 working copy paths and the values are the new mergeinfos for each.
8369 Allocate additions to RESULT_CATALOG in pool which RESULT_CATALOG was
8370 created in.
8371
8372 DEPTH, NOTIFY_B, MERGE_B, and SQUELCH_MERGEINFO_NOTIFICATIONS are all
8373 cascaded from do_directory_merge's arguments of the same names.
8374
8375 SCRATCH_POOL is used for temporary allocations.
8376 */
8377 static svn_error_t *
record_mergeinfo_for_dir_merge(svn_mergeinfo_catalog_t result_catalog,const svn_merge_range_t * merged_range,const char * mergeinfo_fspath,apr_array_header_t * children_with_mergeinfo,svn_depth_t depth,svn_boolean_t squelch_mergeinfo_notifications,merge_cmd_baton_t * merge_b,apr_pool_t * scratch_pool)8378 record_mergeinfo_for_dir_merge(svn_mergeinfo_catalog_t result_catalog,
8379 const svn_merge_range_t *merged_range,
8380 const char *mergeinfo_fspath,
8381 apr_array_header_t *children_with_mergeinfo,
8382 svn_depth_t depth,
8383 svn_boolean_t squelch_mergeinfo_notifications,
8384 merge_cmd_baton_t *merge_b,
8385 apr_pool_t *scratch_pool)
8386 {
8387 int i;
8388 svn_boolean_t is_rollback = (merged_range->start > merged_range->end);
8389 svn_boolean_t operative_merge;
8390
8391 /* Update the WC mergeinfo here to account for our new
8392 merges, minus any unresolved conflicts and skips. */
8393
8394 /* We need a scratch pool for iterations below. */
8395 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
8396
8397 svn_merge_range_t range = *merged_range;
8398
8399 assert(! merge_b->dry_run);
8400
8401 /* Regardless of what subtrees in MERGE_B->target->abspath might be missing
8402 could this merge have been operative? */
8403 operative_merge = subtree_touched_by_merge(merge_b->target->abspath,
8404 merge_b, iterpool);
8405
8406 /* If this couldn't be an operative merge then don't bother with
8407 the added complexity (and user confusion) of non-inheritable ranges.
8408 There is no harm in subtrees inheriting inoperative mergeinfo. */
8409 if (!operative_merge)
8410 range.inheritable = TRUE;
8411
8412 /* Remove absent children at or under MERGE_B->target->abspath from
8413 NOTIFY_B->CHILDREN_WITH_MERGEINFO
8414 before we calculate the merges performed. */
8415 remove_absent_children(merge_b->target->abspath,
8416 children_with_mergeinfo);
8417
8418 /* Determine which subtrees of interest need mergeinfo recorded... */
8419 SVN_ERR(flag_subtrees_needing_mergeinfo(operative_merge, &range,
8420 children_with_mergeinfo,
8421 mergeinfo_fspath, depth,
8422 merge_b, iterpool));
8423
8424 /* ...and then record it. */
8425 for (i = 0; i < children_with_mergeinfo->nelts; i++)
8426 {
8427 const char *child_repos_path;
8428 const char *child_merge_src_fspath;
8429 svn_rangelist_t *child_merge_rangelist;
8430 apr_hash_t *child_merges;
8431 svn_client__merge_path_t *child =
8432 APR_ARRAY_IDX(children_with_mergeinfo, i,
8433 svn_client__merge_path_t *);
8434 SVN_ERR_ASSERT(child);
8435
8436 svn_pool_clear(iterpool);
8437
8438 if (child->record_mergeinfo)
8439 {
8440 child_repos_path = svn_dirent_skip_ancestor(merge_b->target->abspath,
8441 child->abspath);
8442 SVN_ERR_ASSERT(child_repos_path != NULL);
8443 child_merge_src_fspath = svn_fspath__join(mergeinfo_fspath,
8444 child_repos_path,
8445 iterpool);
8446 /* Filter any ranges from each child's natural history before
8447 setting mergeinfo describing the merge. */
8448 SVN_ERR(filter_natural_history_from_mergeinfo(
8449 &child_merge_rangelist, child_merge_src_fspath,
8450 child->implicit_mergeinfo, &range, iterpool));
8451
8452 if (child_merge_rangelist->nelts == 0)
8453 continue;
8454
8455 if (!squelch_mergeinfo_notifications)
8456 {
8457 /* If the merge source has a gap, then don't mention
8458 those gap revisions in the notification. */
8459 remove_source_gap(&range, merge_b->implicit_src_gap);
8460 notify_mergeinfo_recording(child->abspath, &range,
8461 merge_b->ctx, iterpool);
8462 }
8463
8464 /* If we are here we know we will be recording some mergeinfo, but
8465 before we do, set override mergeinfo on skipped paths so they
8466 don't incorrectly inherit the mergeinfo we are about to set. */
8467 if (i == 0)
8468 SVN_ERR(record_skips_in_mergeinfo(mergeinfo_fspath,
8469 child_merge_rangelist,
8470 is_rollback, merge_b, iterpool));
8471
8472 /* We may need to record non-inheritable mergeinfo that applies
8473 only to CHILD->ABSPATH. */
8474 if (child->record_noninheritable)
8475 svn_rangelist__set_inheritance(child_merge_rangelist, FALSE);
8476
8477 /* If CHILD has inherited mergeinfo set it before
8478 recording the first merge range. */
8479 if (child->inherited_mergeinfo)
8480 SVN_ERR(svn_client__record_wc_mergeinfo(
8481 child->abspath,
8482 child->pre_merge_mergeinfo,
8483 FALSE, merge_b->ctx,
8484 iterpool));
8485 if (merge_b->implicit_src_gap)
8486 {
8487 /* If this is a reverse merge reorder CHILD->REMAINING_RANGES
8488 so it will work with the svn_rangelist_remove API. */
8489 if (is_rollback)
8490 SVN_ERR(svn_rangelist_reverse(child_merge_rangelist,
8491 iterpool));
8492
8493 SVN_ERR(svn_rangelist_remove(&child_merge_rangelist,
8494 merge_b->implicit_src_gap,
8495 child_merge_rangelist, FALSE,
8496 iterpool));
8497 if (is_rollback)
8498 SVN_ERR(svn_rangelist_reverse(child_merge_rangelist,
8499 iterpool));
8500 }
8501
8502 child_merges = apr_hash_make(iterpool);
8503
8504 /* The short story:
8505
8506 If we are describing a forward merge, then the naive mergeinfo
8507 defined by MERGE_SOURCE_PATH:MERGED_RANGE->START:
8508 MERGE_SOURCE_PATH:MERGED_RANGE->END may contain non-existent
8509 path-revs or may describe other lines of history. We must
8510 remove these invalid portion(s) before recording mergeinfo
8511 describing the merge.
8512
8513 The long story:
8514
8515 If CHILD is the merge target we know that
8516 MERGE_SOURCE_PATH:MERGED_RANGE->END exists. Further, if there
8517 were no copies in MERGE_SOURCE_PATH's history going back to
8518 RANGE->START then we know that
8519 MERGE_SOURCE_PATH:MERGED_RANGE->START exists too and the two
8520 describe an unbroken line of history, and thus
8521 MERGE_SOURCE_PATH:MERGED_RANGE->START:
8522 MERGE_SOURCE_PATH:MERGED_RANGE->END is a valid description of
8523 the merge -- see normalize_merge_sources() and the global comment
8524 'MERGEINFO MERGE SOURCE NORMALIZATION'.
8525
8526 However, if there *was* a copy, then
8527 MERGE_SOURCE_PATH:MERGED_RANGE->START doesn't exist or is
8528 unrelated to MERGE_SOURCE_PATH:MERGED_RANGE->END. Also, we
8529 don't know if (MERGE_SOURCE_PATH:MERGED_RANGE->START)+1 through
8530 (MERGE_SOURCE_PATH:MERGED_RANGE->END)-1 actually exist.
8531
8532 If CHILD is a subtree of the merge target, then nothing is
8533 guaranteed beyond the fact that MERGE_SOURCE_PATH exists at
8534 MERGED_RANGE->END. */
8535 if ((!merge_b->record_only || merge_b->reintegrate_merge)
8536 && (!is_rollback))
8537 {
8538 svn_error_t *err;
8539 svn_mergeinfo_t subtree_history_as_mergeinfo;
8540 svn_rangelist_t *child_merge_src_rangelist;
8541 svn_client__pathrev_t *subtree_mergeinfo_pathrev
8542 = svn_client__pathrev_create_with_relpath(
8543 merge_b->target->loc.repos_root_url,
8544 merge_b->target->loc.repos_uuid,
8545 merged_range->end, child_merge_src_fspath + 1,
8546 iterpool);
8547
8548 /* Confirm that the naive mergeinfo we want to set on
8549 CHILD->ABSPATH both exists and is part of
8550 (MERGE_SOURCE_PATH+CHILD_REPOS_PATH)@MERGED_RANGE->END's
8551 history. */
8552 /* We know MERGED_RANGE->END is younger than MERGE_RANGE->START
8553 because we only do this for forward merges. */
8554 err = svn_client__get_history_as_mergeinfo(
8555 &subtree_history_as_mergeinfo, NULL,
8556 subtree_mergeinfo_pathrev,
8557 merged_range->end, merged_range->start,
8558 merge_b->ra_session2, merge_b->ctx, iterpool);
8559
8560 /* If CHILD is a subtree it may have been deleted prior to
8561 MERGED_RANGE->END so the above call to get its history
8562 will fail. */
8563 if (err)
8564 {
8565 if (err->apr_err != SVN_ERR_FS_NOT_FOUND)
8566 return svn_error_trace(err);
8567 svn_error_clear(err);
8568 }
8569 else
8570 {
8571 child_merge_src_rangelist = svn_hash_gets(
8572 subtree_history_as_mergeinfo,
8573 child_merge_src_fspath);
8574 SVN_ERR(svn_rangelist_intersect(&child_merge_rangelist,
8575 child_merge_rangelist,
8576 child_merge_src_rangelist,
8577 FALSE, iterpool));
8578 if (child->record_noninheritable)
8579 svn_rangelist__set_inheritance(child_merge_rangelist,
8580 FALSE);
8581 }
8582 }
8583
8584 svn_hash_sets(child_merges, child->abspath, child_merge_rangelist);
8585 SVN_ERR(update_wc_mergeinfo(result_catalog,
8586 child->abspath,
8587 child_merge_src_fspath,
8588 child_merges, is_rollback,
8589 merge_b->ctx, iterpool));
8590
8591 /* Once is enough: We don't need to record mergeinfo describing
8592 the merge a second. If CHILD->ABSPATH is in
8593 MERGE_B->ADDED_ABSPATHS, we'll do just that, so remove the
8594 former from the latter. */
8595 svn_hash_sets(merge_b->added_abspaths, child->abspath, NULL);
8596 }
8597
8598 /* Elide explicit subtree mergeinfo whether or not we updated it. */
8599 if (i > 0)
8600 {
8601 svn_boolean_t in_switched_subtree = FALSE;
8602
8603 if (child->switched)
8604 in_switched_subtree = TRUE;
8605 else if (i > 1)
8606 {
8607 /* Check if CHILD is part of a switched subtree */
8608 svn_client__merge_path_t *parent;
8609 int j = i - 1;
8610 for (; j > 0; j--)
8611 {
8612 parent = APR_ARRAY_IDX(children_with_mergeinfo,
8613 j, svn_client__merge_path_t *);
8614 if (parent
8615 && parent->switched
8616 && svn_dirent_is_ancestor(parent->abspath,
8617 child->abspath))
8618 {
8619 in_switched_subtree = TRUE;
8620 break;
8621 }
8622 }
8623 }
8624
8625 /* Allow mergeinfo on switched subtrees to elide to the
8626 repository. Otherwise limit elision to the merge target
8627 for now. do_directory_merge() will eventually try to
8628 elide that when the merge is complete. */
8629 SVN_ERR(svn_client__elide_mergeinfo(
8630 child->abspath,
8631 in_switched_subtree ? NULL : merge_b->target->abspath,
8632 merge_b->ctx, iterpool));
8633 }
8634 } /* (i = 0; i < notify_b->children_with_mergeinfo->nelts; i++) */
8635
8636 svn_pool_destroy(iterpool);
8637 return SVN_NO_ERROR;
8638 }
8639
8640 /* Helper for do_directory_merge().
8641
8642 Record mergeinfo describing a merge of
8643 MERGED_RANGE->START:MERGED_RANGE->END from the repository relative path
8644 MERGEINFO_FSPATH to each path in ADDED_ABSPATHS which has explicit
8645 mergeinfo or is the immediate child of a parent with explicit
8646 non-inheritable mergeinfo.
8647
8648 DEPTH, MERGE_B, and SQUELCH_MERGEINFO_NOTIFICATIONS, are
8649 cascaded from do_directory_merge's arguments of the same names.
8650
8651 Note: This is intended to support forward merges only, i.e.
8652 MERGED_RANGE->START must be older than MERGED_RANGE->END.
8653 */
8654 static svn_error_t *
record_mergeinfo_for_added_subtrees(svn_merge_range_t * merged_range,const char * mergeinfo_fspath,svn_depth_t depth,svn_boolean_t squelch_mergeinfo_notifications,apr_hash_t * added_abspaths,merge_cmd_baton_t * merge_b,apr_pool_t * pool)8655 record_mergeinfo_for_added_subtrees(
8656 svn_merge_range_t *merged_range,
8657 const char *mergeinfo_fspath,
8658 svn_depth_t depth,
8659 svn_boolean_t squelch_mergeinfo_notifications,
8660 apr_hash_t *added_abspaths,
8661 merge_cmd_baton_t *merge_b,
8662 apr_pool_t *pool)
8663 {
8664 apr_pool_t *iterpool;
8665 apr_hash_index_t *hi;
8666
8667 /* If no paths were added by the merge then we have nothing to do. */
8668 if (!added_abspaths)
8669 return SVN_NO_ERROR;
8670
8671 SVN_ERR_ASSERT(merged_range->start < merged_range->end);
8672
8673 iterpool = svn_pool_create(pool);
8674 for (hi = apr_hash_first(pool, added_abspaths); hi; hi = apr_hash_next(hi))
8675 {
8676 const char *added_abspath = svn__apr_hash_index_key(hi);
8677 const char *dir_abspath;
8678 svn_mergeinfo_t parent_mergeinfo;
8679 svn_mergeinfo_t added_path_mergeinfo;
8680
8681 svn_pool_clear(iterpool);
8682 dir_abspath = svn_dirent_dirname(added_abspath, iterpool);
8683
8684 /* Grab the added path's explicit mergeinfo. */
8685 SVN_ERR(svn_client__get_wc_mergeinfo(&added_path_mergeinfo, NULL,
8686 svn_mergeinfo_explicit,
8687 added_abspath, NULL, NULL, FALSE,
8688 merge_b->ctx, iterpool, iterpool));
8689
8690 /* If the added path doesn't have explicit mergeinfo, does its immediate
8691 parent have non-inheritable mergeinfo? */
8692 if (!added_path_mergeinfo)
8693 SVN_ERR(svn_client__get_wc_mergeinfo(&parent_mergeinfo, NULL,
8694 svn_mergeinfo_explicit,
8695 dir_abspath, NULL, NULL, FALSE,
8696 merge_b->ctx,
8697 iterpool, iterpool));
8698
8699 if (added_path_mergeinfo
8700 || svn_mergeinfo__is_noninheritable(parent_mergeinfo, iterpool))
8701 {
8702 svn_node_kind_t added_path_kind;
8703 svn_mergeinfo_t merge_mergeinfo;
8704 svn_mergeinfo_t adds_history_as_mergeinfo;
8705 svn_rangelist_t *rangelist;
8706 const char *rel_added_path;
8707 const char *added_path_mergeinfo_fspath;
8708 svn_client__pathrev_t *added_path_pathrev;
8709
8710 SVN_ERR(svn_wc_read_kind2(&added_path_kind, merge_b->ctx->wc_ctx,
8711 added_abspath, FALSE, FALSE, iterpool));
8712
8713 /* Calculate the naive mergeinfo describing the merge. */
8714 merge_mergeinfo = apr_hash_make(iterpool);
8715 rangelist = svn_rangelist__initialize(
8716 merged_range->start, merged_range->end,
8717 ((added_path_kind == svn_node_file)
8718 || (!(depth == svn_depth_infinity
8719 || depth == svn_depth_immediates))),
8720 iterpool);
8721
8722 /* Create the new mergeinfo path for added_path's mergeinfo.
8723 (added_abspath had better be a child of MERGE_B->target->abspath
8724 or something is *really* wrong.) */
8725 rel_added_path = svn_dirent_is_child(merge_b->target->abspath,
8726 added_abspath, iterpool);
8727 SVN_ERR_ASSERT(rel_added_path);
8728 added_path_mergeinfo_fspath = svn_fspath__join(mergeinfo_fspath,
8729 rel_added_path,
8730 iterpool);
8731 svn_hash_sets(merge_mergeinfo, added_path_mergeinfo_fspath,
8732 rangelist);
8733
8734 /* Don't add new mergeinfo to describe the merge if that mergeinfo
8735 contains non-existent merge sources.
8736
8737 We know that MERGEINFO_PATH/rel_added_path's history does not
8738 span MERGED_RANGE->START:MERGED_RANGE->END but rather that it
8739 was added at some revions greater than MERGED_RANGE->START
8740 (assuming this is a forward merge). It may have been added,
8741 deleted, and re-added many times. The point is that we cannot
8742 blindly apply the naive mergeinfo calculated above because it
8743 will describe non-existent merge sources. To avoid this we get
8744 take the intersection of the naive mergeinfo with
8745 MERGEINFO_PATH/rel_added_path's history. */
8746 added_path_pathrev = svn_client__pathrev_create_with_relpath(
8747 merge_b->target->loc.repos_root_url,
8748 merge_b->target->loc.repos_uuid,
8749 MAX(merged_range->start, merged_range->end),
8750 added_path_mergeinfo_fspath + 1, iterpool);
8751 SVN_ERR(svn_client__get_history_as_mergeinfo(
8752 &adds_history_as_mergeinfo, NULL,
8753 added_path_pathrev,
8754 MAX(merged_range->start, merged_range->end),
8755 MIN(merged_range->start, merged_range->end),
8756 merge_b->ra_session2, merge_b->ctx, iterpool));
8757
8758 SVN_ERR(svn_mergeinfo_intersect2(&merge_mergeinfo,
8759 merge_mergeinfo,
8760 adds_history_as_mergeinfo,
8761 FALSE, iterpool, iterpool));
8762
8763 /* Combine the explicit mergeinfo on the added path (if any)
8764 with the mergeinfo describing this merge. */
8765 if (added_path_mergeinfo)
8766 SVN_ERR(svn_mergeinfo_merge2(merge_mergeinfo,
8767 added_path_mergeinfo,
8768 iterpool, iterpool));
8769 SVN_ERR(svn_client__record_wc_mergeinfo(
8770 added_abspath, merge_mergeinfo,
8771 !squelch_mergeinfo_notifications, merge_b->ctx, iterpool));
8772 }
8773 }
8774 svn_pool_destroy(iterpool);
8775
8776 return SVN_NO_ERROR;
8777 }
8778 /* Baton structure for log_noop_revs. */
8779 typedef struct log_noop_baton_t
8780 {
8781 /* See the comment 'THE CHILDREN_WITH_MERGEINFO ARRAY' at the start
8782 of this file.*/
8783 apr_array_header_t *children_with_mergeinfo;
8784
8785 /* Absolute repository path of younger of the two merge sources
8786 being diffed. */
8787 const char *source_fspath;
8788
8789 /* The merge target. */
8790 const merge_target_t *target;
8791
8792 /* Initially empty rangelists allocated in POOL. The rangelists are
8793 * populated across multiple invocations of log_noop_revs(). */
8794 svn_rangelist_t *operative_ranges;
8795 svn_rangelist_t *merged_ranges;
8796
8797 /* Pool to store the rangelists. */
8798 apr_pool_t *pool;
8799 } log_noop_baton_t;
8800
8801 /* Helper for log_noop_revs: Merge a svn_merge_range_t representation of
8802 REVISION into RANGELIST. New elements added to rangelist are allocated
8803 in RESULT_POOL.
8804
8805 This is *not* a general purpose rangelist merge but a special replacement
8806 for svn_rangelist_merge when REVISION is guaranteed to be younger than any
8807 element in RANGELIST. svn_rangelist_merge is O(n) worst-case (i.e. when
8808 all the ranges in output rangelist are older than the incoming changes).
8809 This turns the special case of a single incoming younger range into O(1).
8810 */
8811 static svn_error_t *
rangelist_merge_revision(svn_rangelist_t * rangelist,svn_revnum_t revision,apr_pool_t * result_pool)8812 rangelist_merge_revision(svn_rangelist_t *rangelist,
8813 svn_revnum_t revision,
8814 apr_pool_t *result_pool)
8815 {
8816 svn_merge_range_t *new_range;
8817 if (rangelist->nelts)
8818 {
8819 svn_merge_range_t *range = APR_ARRAY_IDX(rangelist, rangelist->nelts - 1,
8820 svn_merge_range_t *);
8821 if (range->end == revision - 1)
8822 {
8823 /* REVISION is adjacent to the youngest range in RANGELIST
8824 so we can simply expand that range to encompass REVISION. */
8825 range->end = revision;
8826 return SVN_NO_ERROR;
8827 }
8828 }
8829 new_range = apr_palloc(result_pool, sizeof(*new_range));
8830 new_range->start = revision - 1;
8831 new_range->end = revision;
8832 new_range->inheritable = TRUE;
8833
8834 APR_ARRAY_PUSH(rangelist, svn_merge_range_t *) = new_range;
8835
8836 return SVN_NO_ERROR;
8837 }
8838
8839 /* Implements the svn_log_entry_receiver_t interface.
8840
8841 BATON is an log_noop_baton_t *.
8842
8843 Add LOG_ENTRY->REVISION to BATON->OPERATIVE_RANGES.
8844
8845 If LOG_ENTRY->REVISION has already been fully merged to
8846 BATON->target->abspath per the mergeinfo in BATON->CHILDREN_WITH_MERGEINFO,
8847 then add LOG_ENTRY->REVISION to BATON->MERGED_RANGES.
8848
8849 Use SCRATCH_POOL for temporary allocations. Allocate additions to
8850 BATON->MERGED_RANGES and BATON->OPERATIVE_RANGES in BATON->POOL.
8851
8852 Note: This callback must be invoked from oldest LOG_ENTRY->REVISION
8853 to youngest LOG_ENTRY->REVISION -- see rangelist_merge_revision().
8854 */
8855 static svn_error_t *
log_noop_revs(void * baton,svn_log_entry_t * log_entry,apr_pool_t * scratch_pool)8856 log_noop_revs(void *baton,
8857 svn_log_entry_t *log_entry,
8858 apr_pool_t *scratch_pool)
8859 {
8860 log_noop_baton_t *log_gap_baton = baton;
8861 apr_hash_index_t *hi;
8862 svn_revnum_t revision;
8863 svn_boolean_t log_entry_rev_required = FALSE;
8864
8865 revision = log_entry->revision;
8866
8867 /* It's possible that authz restrictions on the merge source prevent us
8868 from knowing about any of the changes for LOG_ENTRY->REVISION. */
8869 if (!log_entry->changed_paths2)
8870 return SVN_NO_ERROR;
8871
8872 /* Unconditionally add LOG_ENTRY->REVISION to BATON->OPERATIVE_MERGES. */
8873 SVN_ERR(rangelist_merge_revision(log_gap_baton->operative_ranges,
8874 revision,
8875 log_gap_baton->pool));
8876
8877 /* Examine each path affected by LOG_ENTRY->REVISION. If the explicit or
8878 inherited mergeinfo for *all* of the corresponding paths under
8879 BATON->target->abspath reflects that LOG_ENTRY->REVISION has been
8880 merged, then add LOG_ENTRY->REVISION to BATON->MERGED_RANGES. */
8881 for (hi = apr_hash_first(scratch_pool, log_entry->changed_paths2);
8882 hi;
8883 hi = apr_hash_next(hi))
8884 {
8885 const char *fspath = svn__apr_hash_index_key(hi);
8886 const char *rel_path;
8887 const char *cwmi_abspath;
8888 svn_rangelist_t *paths_explicit_rangelist = NULL;
8889 svn_boolean_t mergeinfo_inherited = FALSE;
8890
8891 /* Adjust REL_PATH so it is relative to the merge source then use it to
8892 calculate what path in the merge target would be affected by this
8893 revision. */
8894 rel_path = svn_fspath__skip_ancestor(log_gap_baton->source_fspath,
8895 fspath);
8896 /* Is PATH even within the merge target? If it isn't we
8897 can disregard it altogether. */
8898 if (rel_path == NULL)
8899 continue;
8900 cwmi_abspath = svn_dirent_join(log_gap_baton->target->abspath,
8901 rel_path, scratch_pool);
8902
8903 /* Find any explicit or inherited mergeinfo for PATH. */
8904 while (!log_entry_rev_required)
8905 {
8906 svn_client__merge_path_t *child = get_child_with_mergeinfo(
8907 log_gap_baton->children_with_mergeinfo, cwmi_abspath);
8908
8909 if (child && child->pre_merge_mergeinfo)
8910 {
8911 /* Found some explicit mergeinfo, grab any ranges
8912 for PATH. */
8913 paths_explicit_rangelist =
8914 svn_hash_gets(child->pre_merge_mergeinfo, fspath);
8915 break;
8916 }
8917
8918 if (cwmi_abspath[0] == '\0'
8919 || svn_dirent_is_root(cwmi_abspath, strlen(cwmi_abspath))
8920 || strcmp(log_gap_baton->target->abspath, cwmi_abspath) == 0)
8921 {
8922 /* Can't crawl any higher. */
8923 break;
8924 }
8925
8926 /* Didn't find anything so crawl up to the parent. */
8927 cwmi_abspath = svn_dirent_dirname(cwmi_abspath, scratch_pool);
8928 fspath = svn_fspath__dirname(fspath, scratch_pool);
8929
8930 /* At this point *if* we find mergeinfo it will be inherited. */
8931 mergeinfo_inherited = TRUE;
8932 }
8933
8934 if (paths_explicit_rangelist)
8935 {
8936 svn_rangelist_t *intersecting_range;
8937 svn_rangelist_t *rangelist;
8938
8939 rangelist = svn_rangelist__initialize(revision - 1, revision, TRUE,
8940 scratch_pool);
8941
8942 /* If PATH inherited mergeinfo we must consider inheritance in the
8943 event the inherited mergeinfo is actually non-inheritable. */
8944 SVN_ERR(svn_rangelist_intersect(&intersecting_range,
8945 paths_explicit_rangelist,
8946 rangelist,
8947 mergeinfo_inherited, scratch_pool));
8948
8949 if (intersecting_range->nelts == 0)
8950 log_entry_rev_required = TRUE;
8951 }
8952 else
8953 {
8954 log_entry_rev_required = TRUE;
8955 }
8956 }
8957
8958 if (!log_entry_rev_required)
8959 SVN_ERR(rangelist_merge_revision(log_gap_baton->merged_ranges,
8960 revision,
8961 log_gap_baton->pool));
8962
8963 return SVN_NO_ERROR;
8964 }
8965
8966 /* Helper for do_directory_merge().
8967
8968 SOURCE is cascaded from the argument of the same name in
8969 do_directory_merge(). TARGET is the merge target. RA_SESSION is the
8970 session for SOURCE->loc2.
8971
8972 Find all the ranges required by subtrees in
8973 CHILDREN_WITH_MERGEINFO that are *not* required by
8974 TARGET->abspath (i.e. CHILDREN_WITH_MERGEINFO[0]). If such
8975 ranges exist, then find any subset of ranges which, if merged, would be
8976 inoperative. Finally, if any inoperative ranges are found then remove
8977 these ranges from all of the subtree's REMAINING_RANGES.
8978
8979 This function should only be called when honoring mergeinfo during
8980 forward merges (i.e. SOURCE->rev1 < SOURCE->rev2).
8981 */
8982 static svn_error_t *
remove_noop_subtree_ranges(const merge_source_t * source,const merge_target_t * target,svn_ra_session_t * ra_session,apr_array_header_t * children_with_mergeinfo,apr_pool_t * result_pool,apr_pool_t * scratch_pool)8983 remove_noop_subtree_ranges(const merge_source_t *source,
8984 const merge_target_t *target,
8985 svn_ra_session_t *ra_session,
8986 apr_array_header_t *children_with_mergeinfo,
8987 apr_pool_t *result_pool,
8988 apr_pool_t *scratch_pool)
8989 {
8990 /* ### Do we need to check that we are at a uniform working revision? */
8991 int i;
8992 svn_client__merge_path_t *root_child =
8993 APR_ARRAY_IDX(children_with_mergeinfo, 0, svn_client__merge_path_t *);
8994 svn_rangelist_t *requested_ranges;
8995 svn_rangelist_t *subtree_gap_ranges;
8996 svn_rangelist_t *subtree_remaining_ranges;
8997 log_noop_baton_t log_gap_baton;
8998 svn_merge_range_t *oldest_gap_rev;
8999 svn_merge_range_t *youngest_gap_rev;
9000 svn_rangelist_t *inoperative_ranges;
9001 apr_pool_t *iterpool;
9002 const char *longest_common_subtree_ancestor = NULL;
9003 svn_error_t *err;
9004
9005 assert(session_url_is(ra_session, source->loc2->url, scratch_pool));
9006
9007 /* This function is only intended to work with forward merges. */
9008 if (source->loc1->rev > source->loc2->rev)
9009 return SVN_NO_ERROR;
9010
9011 /* Another easy out: There are no subtrees. */
9012 if (children_with_mergeinfo->nelts < 2)
9013 return SVN_NO_ERROR;
9014
9015 subtree_remaining_ranges = apr_array_make(scratch_pool, 1,
9016 sizeof(svn_merge_range_t *));
9017
9018 /* Given the requested merge of SOURCE->rev1:rev2 might there be any
9019 part of this range required for subtrees but not for the target? */
9020 requested_ranges = svn_rangelist__initialize(MIN(source->loc1->rev,
9021 source->loc2->rev),
9022 MAX(source->loc1->rev,
9023 source->loc2->rev),
9024 TRUE, scratch_pool);
9025 SVN_ERR(svn_rangelist_remove(&subtree_gap_ranges,
9026 root_child->remaining_ranges,
9027 requested_ranges, FALSE, scratch_pool));
9028
9029 /* Early out, nothing to operate on */
9030 if (!subtree_gap_ranges->nelts)
9031 return SVN_NO_ERROR;
9032
9033 /* Create a rangelist describing every range required across all subtrees. */
9034 iterpool = svn_pool_create(scratch_pool);
9035 for (i = 1; i < children_with_mergeinfo->nelts; i++)
9036 {
9037 svn_client__merge_path_t *child =
9038 APR_ARRAY_IDX(children_with_mergeinfo, i, svn_client__merge_path_t *);
9039
9040 svn_pool_clear(iterpool);
9041
9042 /* Issue #4269: Keep track of the longest common ancestor of all the
9043 subtrees which require merges. This may be a child of
9044 TARGET->ABSPATH, which will allow us to narrow the log request
9045 below. */
9046 if (child->remaining_ranges && child->remaining_ranges->nelts)
9047 {
9048 if (longest_common_subtree_ancestor)
9049 longest_common_subtree_ancestor = svn_dirent_get_longest_ancestor(
9050 longest_common_subtree_ancestor, child->abspath, scratch_pool);
9051 else
9052 longest_common_subtree_ancestor = child->abspath;
9053 }
9054
9055 /* CHILD->REMAINING_RANGES will be NULL if child is absent. */
9056 if (child->remaining_ranges && child->remaining_ranges->nelts)
9057 SVN_ERR(svn_rangelist_merge2(subtree_remaining_ranges,
9058 child->remaining_ranges,
9059 scratch_pool, iterpool));
9060 }
9061 svn_pool_destroy(iterpool);
9062
9063 /* It's possible that none of the subtrees had any remaining ranges. */
9064 if (!subtree_remaining_ranges->nelts)
9065 return SVN_NO_ERROR;
9066
9067 /* Ok, *finally* we can answer what part(s) of SOURCE->rev1:rev2 are
9068 required for the subtrees but not the target. */
9069 SVN_ERR(svn_rangelist_intersect(&subtree_gap_ranges,
9070 subtree_gap_ranges,
9071 subtree_remaining_ranges, FALSE,
9072 scratch_pool));
9073
9074 /* Another early out */
9075 if (!subtree_gap_ranges->nelts)
9076 return SVN_NO_ERROR;
9077
9078 /* One or more subtrees need some revisions that the target doesn't need.
9079 Use log to determine if any of these revisions are inoperative. */
9080 oldest_gap_rev = APR_ARRAY_IDX(subtree_gap_ranges, 0, svn_merge_range_t *);
9081 youngest_gap_rev = APR_ARRAY_IDX(subtree_gap_ranges,
9082 subtree_gap_ranges->nelts - 1, svn_merge_range_t *);
9083
9084 /* Set up the log baton. */
9085 log_gap_baton.children_with_mergeinfo = children_with_mergeinfo;
9086 log_gap_baton.source_fspath
9087 = svn_client__pathrev_fspath(source->loc2, result_pool);
9088 log_gap_baton.target = target;
9089 log_gap_baton.merged_ranges = apr_array_make(scratch_pool, 0,
9090 sizeof(svn_revnum_t *));
9091 log_gap_baton.operative_ranges = apr_array_make(scratch_pool, 0,
9092 sizeof(svn_revnum_t *));
9093 log_gap_baton.pool = svn_pool_create(scratch_pool);
9094
9095 /* Find the longest common ancestor of all subtrees relative to
9096 RA_SESSION's URL. */
9097 if (longest_common_subtree_ancestor)
9098 longest_common_subtree_ancestor =
9099 svn_dirent_skip_ancestor(target->abspath,
9100 longest_common_subtree_ancestor);
9101 else
9102 longest_common_subtree_ancestor = "";
9103
9104 /* Invoke the svn_log_entry_receiver_t receiver log_noop_revs() from
9105 oldest to youngest. The receiver is optimized to add ranges to
9106 log_gap_baton.merged_ranges and log_gap_baton.operative_ranges, but
9107 requires that the revs arrive oldest to youngest -- see log_noop_revs()
9108 and rangelist_merge_revision(). */
9109 err = get_log(ra_session, longest_common_subtree_ancestor,
9110 oldest_gap_rev->start + 1, youngest_gap_rev->end, TRUE,
9111 log_noop_revs, &log_gap_baton, scratch_pool);
9112
9113 /* It's possible that the only subtrees with mergeinfo in TARGET don't have
9114 any corresponding subtree in SOURCE between SOURCE->REV1 < SOURCE->REV2.
9115 So it's also possible that we may ask for the logs of non-existent paths.
9116 If we do, then assume that no subtree requires any ranges that are not
9117 already required by the TARGET. */
9118 if (err)
9119 {
9120 if (err->apr_err != SVN_ERR_FS_NOT_FOUND
9121 && longest_common_subtree_ancestor[0] != '\0')
9122 return svn_error_trace(err);
9123
9124 /* Asked about a non-existent subtree in SOURCE. */
9125 svn_error_clear(err);
9126 log_gap_baton.merged_ranges =
9127 svn_rangelist__initialize(oldest_gap_rev->start,
9128 youngest_gap_rev->end,
9129 TRUE, scratch_pool);
9130 }
9131 else
9132 {
9133 inoperative_ranges = svn_rangelist__initialize(oldest_gap_rev->start,
9134 youngest_gap_rev->end,
9135 TRUE, scratch_pool);
9136 SVN_ERR(svn_rangelist_remove(&(inoperative_ranges),
9137 log_gap_baton.operative_ranges,
9138 inoperative_ranges, FALSE, scratch_pool));
9139 SVN_ERR(svn_rangelist_merge2(log_gap_baton.merged_ranges, inoperative_ranges,
9140 scratch_pool, scratch_pool));
9141 }
9142
9143 for (i = 1; i < children_with_mergeinfo->nelts; i++)
9144 {
9145 svn_client__merge_path_t *child =
9146 APR_ARRAY_IDX(children_with_mergeinfo, i, svn_client__merge_path_t *);
9147
9148 /* CHILD->REMAINING_RANGES will be NULL if child is absent. */
9149 if (child->remaining_ranges && child->remaining_ranges->nelts)
9150 {
9151 /* Remove inoperative ranges from all children so we don't perform
9152 inoperative editor drives. */
9153 SVN_ERR(svn_rangelist_remove(&(child->remaining_ranges),
9154 log_gap_baton.merged_ranges,
9155 child->remaining_ranges,
9156 FALSE, result_pool));
9157 }
9158 }
9159
9160 svn_pool_destroy(log_gap_baton.pool);
9161
9162 return SVN_NO_ERROR;
9163 }
9164
9165 /* Perform a merge of changes in SOURCE to the working copy path
9166 TARGET_ABSPATH. Both URLs in SOURCE, and TARGET_ABSPATH all represent
9167 directories -- for the single file case, the caller should use
9168 do_file_merge().
9169
9170 CHILDREN_WITH_MERGEINFO and MERGE_B describe the merge being performed
9171 As this function is for a mergeinfo-aware merge, SOURCE->ancestral
9172 should be TRUE, and SOURCE->loc1 must be a historical ancestor of
9173 SOURCE->loc2, or vice-versa (see `MERGEINFO MERGE SOURCE NORMALIZATION'
9174 for more requirements around SOURCE).
9175
9176 Mergeinfo changes will be recorded unless MERGE_B->dry_run is true.
9177
9178 If mergeinfo is being recorded, SQUELCH_MERGEINFO_NOTIFICATIONS is FALSE,
9179 and MERGE_B->CTX->NOTIFY_FUNC2 is not NULL, then call
9180 MERGE_B->CTX->NOTIFY_FUNC2 with MERGE_B->CTX->NOTIFY_BATON2 and a
9181 svn_wc_notify_merge_record_info_begin notification before any mergeinfo
9182 changes are made to describe the merge performed.
9183
9184 If mergeinfo is being recorded to describe this merge, and RESULT_CATALOG
9185 is not NULL, then don't record the new mergeinfo on the WC, but instead
9186 record it in RESULT_CATALOG, where the keys are absolute working copy
9187 paths and the values are the new mergeinfos for each. Allocate additions
9188 to RESULT_CATALOG in pool which RESULT_CATALOG was created in.
9189
9190 Handle DEPTH as documented for svn_client_merge5().
9191
9192 CONFLICT_REPORT is as documented for do_directory_merge().
9193
9194 Perform any temporary allocations in SCRATCH_POOL.
9195
9196 NOTE: This is a wrapper around drive_merge_report_editor() which
9197 handles the complexities inherent to situations where a given
9198 directory's children may have intersecting merges (because they
9199 meet one or more of the criteria described in get_mergeinfo_paths()).
9200 */
9201 static svn_error_t *
do_mergeinfo_aware_dir_merge(svn_mergeinfo_catalog_t result_catalog,single_range_conflict_report_t ** conflict_report,const merge_source_t * source,const char * target_abspath,apr_array_header_t * children_with_mergeinfo,const svn_diff_tree_processor_t * processor,svn_depth_t depth,svn_boolean_t squelch_mergeinfo_notifications,merge_cmd_baton_t * merge_b,apr_pool_t * result_pool,apr_pool_t * scratch_pool)9202 do_mergeinfo_aware_dir_merge(svn_mergeinfo_catalog_t result_catalog,
9203 single_range_conflict_report_t **conflict_report,
9204 const merge_source_t *source,
9205 const char *target_abspath,
9206 apr_array_header_t *children_with_mergeinfo,
9207 const svn_diff_tree_processor_t *processor,
9208 svn_depth_t depth,
9209 svn_boolean_t squelch_mergeinfo_notifications,
9210 merge_cmd_baton_t *merge_b,
9211 apr_pool_t *result_pool,
9212 apr_pool_t *scratch_pool)
9213 {
9214 /* The range defining the mergeinfo we will record to describe the merge
9215 (assuming we are recording mergeinfo
9216
9217 Note: This may be a subset of SOURCE->rev1:rev2 if
9218 populate_remaining_ranges() determines that some part of
9219 SOURCE->rev1:rev2 has already been wholly merged to TARGET_ABSPATH.
9220 Also, the actual editor drive(s) may be a subset of RANGE, if
9221 remove_noop_subtree_ranges() and/or fix_deleted_subtree_ranges()
9222 further tweak things. */
9223 svn_merge_range_t range;
9224
9225 svn_ra_session_t *ra_session;
9226 svn_client__merge_path_t *target_merge_path;
9227 svn_boolean_t is_rollback = (source->loc1->rev > source->loc2->rev);
9228
9229 SVN_ERR_ASSERT(source->ancestral);
9230
9231 /*** If we get here, we're dealing with related sources from the
9232 same repository as the target -- merge tracking might be
9233 happenin'! ***/
9234
9235 *conflict_report = NULL;
9236
9237 /* Point our RA_SESSION to the URL of our youngest merge source side. */
9238 ra_session = is_rollback ? merge_b->ra_session1 : merge_b->ra_session2;
9239
9240 /* Fill NOTIFY_B->CHILDREN_WITH_MERGEINFO with child paths (const
9241 svn_client__merge_path_t *) which might have intersecting merges
9242 because they meet one or more of the criteria described in
9243 get_mergeinfo_paths(). Here the paths are arranged in a depth
9244 first order. */
9245 SVN_ERR(get_mergeinfo_paths(children_with_mergeinfo,
9246 merge_b->target, depth,
9247 merge_b->dry_run, merge_b->same_repos,
9248 merge_b->ctx, scratch_pool, scratch_pool));
9249
9250 /* The first item from the NOTIFY_B->CHILDREN_WITH_MERGEINFO is always
9251 the target thanks to depth-first ordering. */
9252 target_merge_path = APR_ARRAY_IDX(children_with_mergeinfo, 0,
9253 svn_client__merge_path_t *);
9254
9255 /* If we are honoring mergeinfo, then for each item in
9256 NOTIFY_B->CHILDREN_WITH_MERGEINFO, we need to calculate what needs to be
9257 merged, and then merge it. Otherwise, we just merge what we were asked
9258 to merge across the whole tree. */
9259 SVN_ERR(populate_remaining_ranges(children_with_mergeinfo,
9260 source, ra_session,
9261 merge_b, scratch_pool, scratch_pool));
9262
9263 /* Always start with a range which describes the most inclusive merge
9264 possible, i.e. SOURCE->rev1:rev2. */
9265 range.start = source->loc1->rev;
9266 range.end = source->loc2->rev;
9267 range.inheritable = TRUE;
9268
9269 if (!merge_b->reintegrate_merge)
9270 {
9271 svn_revnum_t new_range_start, start_rev;
9272 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
9273
9274 /* The merge target TARGET_ABSPATH and/or its subtrees may not need all
9275 of SOURCE->rev1:rev2 applied. So examine
9276 NOTIFY_B->CHILDREN_WITH_MERGEINFO to find the oldest starting
9277 revision that actually needs to be merged (for reverse merges this is
9278 the youngest starting revision).
9279
9280 We'll do this twice, right now for the start of the mergeinfo we will
9281 ultimately record to describe this merge and then later for the
9282 start of the actual editor drive. */
9283 new_range_start = get_most_inclusive_rev(
9284 children_with_mergeinfo, is_rollback, TRUE);
9285 if (SVN_IS_VALID_REVNUM(new_range_start))
9286 range.start = new_range_start;
9287
9288 /* Remove inoperative ranges from any subtrees' remaining_ranges
9289 to spare the expense of noop editor drives. */
9290 if (!is_rollback)
9291 SVN_ERR(remove_noop_subtree_ranges(source, merge_b->target,
9292 ra_session,
9293 children_with_mergeinfo,
9294 scratch_pool, iterpool));
9295
9296 /* Adjust subtrees' remaining_ranges to deal with issue #3067:
9297 * "subtrees that don't exist at the start or end of a merge range
9298 * shouldn't break the merge". */
9299 SVN_ERR(fix_deleted_subtree_ranges(source, merge_b->target,
9300 ra_session,
9301 children_with_mergeinfo,
9302 merge_b->ctx, scratch_pool, iterpool));
9303
9304 /* remove_noop_subtree_ranges() and/or fix_deleted_subtree_range()
9305 may have further refined the starting revision for our editor
9306 drive. */
9307 start_rev =
9308 get_most_inclusive_rev(children_with_mergeinfo,
9309 is_rollback, TRUE);
9310
9311 /* Is there anything to merge? */
9312 if (SVN_IS_VALID_REVNUM(start_rev))
9313 {
9314 /* Now examine NOTIFY_B->CHILDREN_WITH_MERGEINFO to find the oldest
9315 ending revision that actually needs to be merged (for reverse
9316 merges this is the youngest ending revision). */
9317 svn_revnum_t end_rev =
9318 get_most_inclusive_rev(children_with_mergeinfo,
9319 is_rollback, FALSE);
9320
9321 /* While END_REV is valid, do the following:
9322
9323 1. Tweak each NOTIFY_B->CHILDREN_WITH_MERGEINFO element so that
9324 the element's remaining_ranges member has as its first element
9325 a range that ends with end_rev.
9326
9327 2. Starting with start_rev, call drive_merge_report_editor()
9328 on MERGE_B->target->abspath for start_rev:end_rev.
9329
9330 3. Remove the first element from each
9331 NOTIFY_B->CHILDREN_WITH_MERGEINFO element's remaining_ranges
9332 member.
9333
9334 4. Again examine NOTIFY_B->CHILDREN_WITH_MERGEINFO to find the most
9335 inclusive starting revision that actually needs to be merged and
9336 update start_rev. This prevents us from needlessly contacting the
9337 repository and doing a diff where we describe the entire target
9338 tree as *not* needing any of the requested range. This can happen
9339 whenever we have mergeinfo with gaps in it for the merge source.
9340
9341 5. Again examine NOTIFY_B->CHILDREN_WITH_MERGEINFO to find the most
9342 inclusive ending revision that actually needs to be merged and
9343 update end_rev.
9344
9345 6. Lather, rinse, repeat.
9346 */
9347
9348 while (end_rev != SVN_INVALID_REVNUM)
9349 {
9350 merge_source_t *real_source;
9351 svn_merge_range_t *first_target_range
9352 = (target_merge_path->remaining_ranges->nelts == 0 ? NULL
9353 : APR_ARRAY_IDX(target_merge_path->remaining_ranges, 0,
9354 svn_merge_range_t *));
9355
9356 /* Issue #3324: Stop editor abuse! Don't call
9357 drive_merge_report_editor() in such a way that we request an
9358 editor with svn_client__get_diff_editor() for some rev X,
9359 then call svn_ra_do_diff3() for some revision Y, and then
9360 call reporter->set_path(PATH=="") to set the root revision
9361 for the editor drive to revision Z where
9362 (X != Z && X < Z < Y). This is bogus because the server will
9363 send us the diff between X:Y but the client is expecting the
9364 diff between Y:Z. See issue #3324 for full details on the
9365 problems this can cause. */
9366 if (first_target_range
9367 && start_rev != first_target_range->start)
9368 {
9369 if (is_rollback)
9370 {
9371 if (end_rev < first_target_range->start)
9372 end_rev = first_target_range->start;
9373 }
9374 else
9375 {
9376 if (end_rev > first_target_range->start)
9377 end_rev = first_target_range->start;
9378 }
9379 }
9380
9381 svn_pool_clear(iterpool);
9382
9383 slice_remaining_ranges(children_with_mergeinfo,
9384 is_rollback, end_rev, scratch_pool);
9385
9386 /* Reset variables that must be reset for every drive */
9387 merge_b->notify_begin.last_abspath = NULL;
9388
9389 real_source = subrange_source(source, start_rev, end_rev, iterpool);
9390 SVN_ERR(drive_merge_report_editor(
9391 merge_b->target->abspath,
9392 real_source,
9393 children_with_mergeinfo,
9394 processor,
9395 depth,
9396 merge_b,
9397 iterpool));
9398
9399 /* If any paths picked up explicit mergeinfo as a result of
9400 the merge we need to make sure any mergeinfo those paths
9401 inherited is recorded and then add these paths to
9402 NOTIFY_B->CHILDREN_WITH_MERGEINFO.*/
9403 SVN_ERR(process_children_with_new_mergeinfo(
9404 merge_b, children_with_mergeinfo,
9405 scratch_pool));
9406
9407 /* If any subtrees had their explicit mergeinfo deleted as a
9408 result of the merge then remove these paths from
9409 NOTIFY_B->CHILDREN_WITH_MERGEINFO since there is no need
9410 to consider these subtrees for subsequent editor drives
9411 nor do we want to record mergeinfo on them describing
9412 the merge itself. */
9413 remove_children_with_deleted_mergeinfo(
9414 merge_b, children_with_mergeinfo);
9415
9416 /* Prepare for the next iteration (if any). */
9417 remove_first_range_from_remaining_ranges(
9418 end_rev, children_with_mergeinfo, scratch_pool);
9419
9420 /* If we raised any conflicts, break out and report how much
9421 we have merged. */
9422 if (is_path_conflicted_by_merge(merge_b))
9423 {
9424 merge_source_t *remaining_range = NULL;
9425
9426 if (real_source->loc2->rev != source->loc2->rev)
9427 remaining_range = subrange_source(source,
9428 real_source->loc2->rev,
9429 source->loc2->rev,
9430 scratch_pool);
9431 *conflict_report = single_range_conflict_report_create(
9432 real_source, remaining_range,
9433 result_pool);
9434
9435 range.end = end_rev;
9436 break;
9437 }
9438
9439 start_rev =
9440 get_most_inclusive_rev(children_with_mergeinfo,
9441 is_rollback, TRUE);
9442 end_rev =
9443 get_most_inclusive_rev(children_with_mergeinfo,
9444 is_rollback, FALSE);
9445 }
9446 }
9447 svn_pool_destroy(iterpool);
9448 }
9449 else
9450 {
9451 if (!merge_b->record_only)
9452 {
9453 /* Reset cur_ancestor_abspath to null so that subsequent cherry
9454 picked revision ranges will be notified upon subsequent
9455 operative merge. */
9456 merge_b->notify_begin.last_abspath = NULL;
9457
9458 SVN_ERR(drive_merge_report_editor(merge_b->target->abspath,
9459 source,
9460 NULL,
9461 processor,
9462 depth,
9463 merge_b,
9464 scratch_pool));
9465 }
9466 }
9467
9468 /* Record mergeinfo where appropriate.*/
9469 if (RECORD_MERGEINFO(merge_b))
9470 {
9471 const svn_client__pathrev_t *primary_src
9472 = is_rollback ? source->loc1 : source->loc2;
9473 const char *mergeinfo_path
9474 = svn_client__pathrev_fspath(primary_src, scratch_pool);
9475
9476 SVN_ERR(record_mergeinfo_for_dir_merge(result_catalog,
9477 &range,
9478 mergeinfo_path,
9479 children_with_mergeinfo,
9480 depth,
9481 squelch_mergeinfo_notifications,
9482 merge_b,
9483 scratch_pool));
9484
9485 /* If a path has an immediate parent with non-inheritable mergeinfo at
9486 this point, then it meets criteria 3 or 5 described in
9487 get_mergeinfo_paths' doc string. For paths which exist prior to a
9488 merge explicit mergeinfo has already been set. But for paths added
9489 during the merge this is not the case. The path might have explicit
9490 mergeinfo from the merge source, but no mergeinfo yet exists
9491 describing *this* merge. So the added path has either incomplete
9492 explicit mergeinfo or inherits incomplete mergeinfo from its
9493 immediate parent (if any, the parent might have only non-inheritable
9494 ranges in which case the path simply inherits empty mergeinfo).
9495
9496 So here we look at the root path of each subtree added during the
9497 merge and set explicit mergeinfo on it if it meets the aforementioned
9498 conditions. */
9499 if (range.start < range.end) /* Nothing to record on added subtrees
9500 resulting from reverse merges. */
9501 {
9502 SVN_ERR(record_mergeinfo_for_added_subtrees(
9503 &range, mergeinfo_path, depth,
9504 squelch_mergeinfo_notifications,
9505 merge_b->added_abspaths, merge_b, scratch_pool));
9506 }
9507 }
9508
9509 return SVN_NO_ERROR;
9510 }
9511
9512 /* Helper for do_merge() when the merge target is a directory.
9513 *
9514 * If any conflict is raised during the merge, set *CONFLICTED_RANGE to
9515 * the revision sub-range that raised the conflict. In this case, the
9516 * merge will have ended at revision CONFLICTED_RANGE and mergeinfo will
9517 * have been recorded for all revision sub-ranges up to and including
9518 * CONFLICTED_RANGE. Otherwise, set *CONFLICTED_RANGE to NULL.
9519 */
9520 static svn_error_t *
do_directory_merge(svn_mergeinfo_catalog_t result_catalog,single_range_conflict_report_t ** conflict_report,const merge_source_t * source,const char * target_abspath,const svn_diff_tree_processor_t * processor,svn_depth_t depth,svn_boolean_t squelch_mergeinfo_notifications,merge_cmd_baton_t * merge_b,apr_pool_t * result_pool,apr_pool_t * scratch_pool)9521 do_directory_merge(svn_mergeinfo_catalog_t result_catalog,
9522 single_range_conflict_report_t **conflict_report,
9523 const merge_source_t *source,
9524 const char *target_abspath,
9525 const svn_diff_tree_processor_t *processor,
9526 svn_depth_t depth,
9527 svn_boolean_t squelch_mergeinfo_notifications,
9528 merge_cmd_baton_t *merge_b,
9529 apr_pool_t *result_pool,
9530 apr_pool_t *scratch_pool)
9531 {
9532 apr_array_header_t *children_with_mergeinfo;
9533
9534 /* Initialize CHILDREN_WITH_MERGEINFO. See the comment
9535 'THE CHILDREN_WITH_MERGEINFO ARRAY' at the start of this file. */
9536 children_with_mergeinfo =
9537 apr_array_make(scratch_pool, 16, sizeof(svn_client__merge_path_t *));
9538
9539 /* And make it read-only accessible from the baton */
9540 merge_b->notify_begin.nodes_with_mergeinfo = children_with_mergeinfo;
9541
9542 /* If we are not honoring mergeinfo we can skip right to the
9543 business of merging changes! */
9544 if (HONOR_MERGEINFO(merge_b))
9545 SVN_ERR(do_mergeinfo_aware_dir_merge(result_catalog, conflict_report,
9546 source, target_abspath,
9547 children_with_mergeinfo,
9548 processor, depth,
9549 squelch_mergeinfo_notifications,
9550 merge_b, result_pool, scratch_pool));
9551 else
9552 SVN_ERR(do_mergeinfo_unaware_dir_merge(conflict_report,
9553 source, target_abspath,
9554 children_with_mergeinfo,
9555 processor, depth,
9556 merge_b, result_pool, scratch_pool));
9557
9558 merge_b->notify_begin.nodes_with_mergeinfo = NULL;
9559
9560 return SVN_NO_ERROR;
9561 }
9562
9563 /** Ensure that *RA_SESSION is opened to URL, either by reusing
9564 * *RA_SESSION if it is non-null and already opened to URL's
9565 * repository, or by allocating a new *RA_SESSION in POOL.
9566 * (RA_SESSION itself cannot be null, of course.)
9567 *
9568 * CTX is used as for svn_client_open_ra_session().
9569 */
9570 static svn_error_t *
ensure_ra_session_url(svn_ra_session_t ** ra_session,const char * url,const char * wri_abspath,svn_client_ctx_t * ctx,apr_pool_t * pool)9571 ensure_ra_session_url(svn_ra_session_t **ra_session,
9572 const char *url,
9573 const char *wri_abspath,
9574 svn_client_ctx_t *ctx,
9575 apr_pool_t *pool)
9576 {
9577 svn_error_t *err = SVN_NO_ERROR;
9578
9579 if (*ra_session)
9580 {
9581 err = svn_ra_reparent(*ra_session, url, pool);
9582 }
9583
9584 /* SVN_ERR_RA_ILLEGAL_URL is raised when url doesn't point to the same
9585 repository as ra_session. */
9586 if (! *ra_session || (err && err->apr_err == SVN_ERR_RA_ILLEGAL_URL))
9587 {
9588 svn_error_clear(err);
9589 err = svn_client_open_ra_session2(ra_session, url, wri_abspath,
9590 ctx, pool, pool);
9591 }
9592 SVN_ERR(err);
9593
9594 return SVN_NO_ERROR;
9595 }
9596
9597 /* Drive a merge of MERGE_SOURCES into working copy node TARGET
9598 and possibly record mergeinfo describing the merge -- see
9599 RECORD_MERGEINFO().
9600
9601 If MODIFIED_SUBTREES is not NULL and all the MERGE_SOURCES are 'ancestral'
9602 or REINTEGRATE_MERGE is true, then replace *MODIFIED_SUBTREES with a new
9603 hash containing all the paths that *MODIFIED_SUBTREES contained before,
9604 and also every path modified, skipped, added, or tree-conflicted
9605 by the merge. Keys and values of the hash are both (const char *)
9606 absolute paths. The contents of the hash are allocated in RESULT_POOL.
9607
9608 If the merge raises any conflicts while merging a revision range, return
9609 early and set *CONFLICT_REPORT to describe the details. (In this case,
9610 notify that the merge is complete if and only if this was the last
9611 revision range of the merge.) If there are no conflicts, set
9612 *CONFLICT_REPORT to NULL. A revision range here can be one specified
9613 in MERGE_SOURCES or an internally generated sub-range of one of those
9614 when merge tracking is in use.
9615
9616 For every (const merge_source_t *) merge source in MERGE_SOURCES, if
9617 SOURCE->ANCESTRAL is set, then the "left" and "right" side are
9618 ancestrally related. (See 'MERGEINFO MERGE SOURCE NORMALIZATION'
9619 for more on what that means and how it matters.)
9620
9621 If SOURCES_RELATED is set, the "left" and "right" sides of the
9622 merge source are historically related (ancestors, uncles, second
9623 cousins thrice removed, etc...). (This is passed through to
9624 do_file_merge() to simulate the history checks that the repository
9625 logic does in the directory case.)
9626
9627 SAME_REPOS is TRUE iff the merge sources live in the same
9628 repository as the one from which the target working copy has been
9629 checked out.
9630
9631 If mergeinfo is being recorded, SQUELCH_MERGEINFO_NOTIFICATIONS is FALSE,
9632 and CTX->NOTIFY_FUNC2 is not NULL, then call CTX->NOTIFY_FUNC2 with
9633 CTX->NOTIFY_BATON2 and a svn_wc_notify_merge_record_info_begin
9634 notification before any mergeinfo changes are made to describe the merge
9635 performed.
9636
9637 If mergeinfo is being recorded to describe this merge, and RESULT_CATALOG
9638 is not NULL, then don't record the new mergeinfo on the WC, but instead
9639 record it in RESULT_CATALOG, where the keys are absolute working copy
9640 paths and the values are the new mergeinfos for each. Allocate additions
9641 to RESULT_CATALOG in pool which RESULT_CATALOG was created in.
9642
9643 FORCE_DELETE, DRY_RUN, RECORD_ONLY, DEPTH, MERGE_OPTIONS,
9644 and CTX are as described in the docstring for svn_client_merge_peg3().
9645
9646 If IGNORE_MERGEINFO is true, disable merge tracking, by treating the two
9647 sources as unrelated even if they actually have a common ancestor. See
9648 the macro HONOR_MERGEINFO().
9649
9650 If DIFF_IGNORE_ANCESTRY is true, diff the 'left' and 'right' versions
9651 of a node (if they are the same kind) as if they were related, even if
9652 they are not related. Otherwise, diff unrelated items as a deletion
9653 of one thing and the addition of another.
9654
9655 If not NULL, RECORD_ONLY_PATHS is a hash of (const char *) paths mapped
9656 to the same. If RECORD_ONLY is true and RECORD_ONLY_PATHS is not NULL,
9657 then record mergeinfo describing the merge only on subtrees which contain
9658 items from RECORD_ONLY_PATHS. If RECORD_ONLY is true and RECORD_ONLY_PATHS
9659 is NULL, then record mergeinfo on every subtree with mergeinfo in
9660 TARGET.
9661
9662 REINTEGRATE_MERGE is TRUE if this is a reintegrate merge.
9663
9664 *USE_SLEEP will be set TRUE if a sleep is required to ensure timestamp
9665 integrity, *USE_SLEEP will be unchanged if no sleep is required.
9666
9667 SCRATCH_POOL is used for all temporary allocations.
9668 */
9669 static svn_error_t *
do_merge(apr_hash_t ** modified_subtrees,svn_mergeinfo_catalog_t result_catalog,conflict_report_t ** conflict_report,svn_boolean_t * use_sleep,const apr_array_header_t * merge_sources,const merge_target_t * target,svn_ra_session_t * src_session,svn_boolean_t sources_related,svn_boolean_t same_repos,svn_boolean_t ignore_mergeinfo,svn_boolean_t diff_ignore_ancestry,svn_boolean_t force_delete,svn_boolean_t dry_run,svn_boolean_t record_only,apr_hash_t * record_only_paths,svn_boolean_t reintegrate_merge,svn_boolean_t squelch_mergeinfo_notifications,svn_depth_t depth,const apr_array_header_t * merge_options,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)9670 do_merge(apr_hash_t **modified_subtrees,
9671 svn_mergeinfo_catalog_t result_catalog,
9672 conflict_report_t **conflict_report,
9673 svn_boolean_t *use_sleep,
9674 const apr_array_header_t *merge_sources,
9675 const merge_target_t *target,
9676 svn_ra_session_t *src_session,
9677 svn_boolean_t sources_related,
9678 svn_boolean_t same_repos,
9679 svn_boolean_t ignore_mergeinfo,
9680 svn_boolean_t diff_ignore_ancestry,
9681 svn_boolean_t force_delete,
9682 svn_boolean_t dry_run,
9683 svn_boolean_t record_only,
9684 apr_hash_t *record_only_paths,
9685 svn_boolean_t reintegrate_merge,
9686 svn_boolean_t squelch_mergeinfo_notifications,
9687 svn_depth_t depth,
9688 const apr_array_header_t *merge_options,
9689 svn_client_ctx_t *ctx,
9690 apr_pool_t *result_pool,
9691 apr_pool_t *scratch_pool)
9692 {
9693 merge_cmd_baton_t merge_cmd_baton = { 0 };
9694 svn_config_t *cfg;
9695 const char *diff3_cmd;
9696 const char *preserved_exts_str;
9697 int i;
9698 svn_boolean_t checked_mergeinfo_capability = FALSE;
9699 svn_ra_session_t *ra_session1 = NULL, *ra_session2 = NULL;
9700 const char *old_src_session_url = NULL;
9701 apr_pool_t *iterpool;
9702 const svn_diff_tree_processor_t *processor;
9703
9704 SVN_ERR_ASSERT(svn_dirent_is_absolute(target->abspath));
9705
9706 *conflict_report = NULL;
9707
9708 /* Check from some special conditions when in record-only mode
9709 (which is a merge-tracking thing). */
9710 if (record_only)
9711 {
9712 svn_boolean_t sources_ancestral = TRUE;
9713 int j;
9714
9715 /* Find out whether all of the sources are 'ancestral'. */
9716 for (j = 0; j < merge_sources->nelts; j++)
9717 if (! APR_ARRAY_IDX(merge_sources, j, merge_source_t *)->ancestral)
9718 {
9719 sources_ancestral = FALSE;
9720 break;
9721 }
9722
9723 /* We can't do a record-only merge if the sources aren't related. */
9724 if (! sources_ancestral)
9725 return svn_error_create(SVN_ERR_INCORRECT_PARAMS, NULL,
9726 _("Use of two URLs is not compatible with "
9727 "mergeinfo modification"));
9728
9729 /* We can't do a record-only merge if the sources aren't from
9730 the same repository as the target. */
9731 if (! same_repos)
9732 return svn_error_create(SVN_ERR_INCORRECT_PARAMS, NULL,
9733 _("Merge from foreign repository is not "
9734 "compatible with mergeinfo modification"));
9735
9736 /* If this is a dry-run record-only merge, there's nothing to do. */
9737 if (dry_run)
9738 return SVN_NO_ERROR;
9739 }
9740
9741 iterpool = svn_pool_create(scratch_pool);
9742
9743 /* Ensure a known depth. */
9744 if (depth == svn_depth_unknown)
9745 depth = svn_depth_infinity;
9746
9747 /* Set up the diff3 command, so various callers don't have to. */
9748 cfg = ctx->config
9749 ? svn_hash_gets(ctx->config, SVN_CONFIG_CATEGORY_CONFIG)
9750 : NULL;
9751 svn_config_get(cfg, &diff3_cmd, SVN_CONFIG_SECTION_HELPERS,
9752 SVN_CONFIG_OPTION_DIFF3_CMD, NULL);
9753
9754 if (diff3_cmd != NULL)
9755 SVN_ERR(svn_path_cstring_to_utf8(&diff3_cmd, diff3_cmd, scratch_pool));
9756
9757 /* See which files the user wants to preserve the extension of when
9758 conflict files are made. */
9759 svn_config_get(cfg, &preserved_exts_str, SVN_CONFIG_SECTION_MISCELLANY,
9760 SVN_CONFIG_OPTION_PRESERVED_CF_EXTS, "");
9761
9762 /* Build the merge context baton (or at least the parts of it that
9763 don't need to be reset for each merge source). */
9764 merge_cmd_baton.force_delete = force_delete;
9765 merge_cmd_baton.dry_run = dry_run;
9766 merge_cmd_baton.record_only = record_only;
9767 merge_cmd_baton.ignore_mergeinfo = ignore_mergeinfo;
9768 merge_cmd_baton.diff_ignore_ancestry = diff_ignore_ancestry;
9769 merge_cmd_baton.same_repos = same_repos;
9770 merge_cmd_baton.mergeinfo_capable = FALSE;
9771 merge_cmd_baton.ctx = ctx;
9772 merge_cmd_baton.reintegrate_merge = reintegrate_merge;
9773 merge_cmd_baton.target = target;
9774 merge_cmd_baton.pool = iterpool;
9775 merge_cmd_baton.merge_options = merge_options;
9776 merge_cmd_baton.diff3_cmd = diff3_cmd;
9777 merge_cmd_baton.ext_patterns = *preserved_exts_str
9778 ? svn_cstring_split(preserved_exts_str, "\n\r\t\v ",
9779 FALSE, scratch_pool)
9780 : NULL;
9781
9782 merge_cmd_baton.use_sleep = use_sleep;
9783
9784 /* Do we already know the specific subtrees with mergeinfo we want
9785 to record-only mergeinfo on? */
9786 if (record_only && record_only_paths)
9787 merge_cmd_baton.merged_abspaths = record_only_paths;
9788 else
9789 merge_cmd_baton.merged_abspaths = apr_hash_make(result_pool);
9790
9791 merge_cmd_baton.skipped_abspaths = apr_hash_make(result_pool);
9792 merge_cmd_baton.added_abspaths = apr_hash_make(result_pool);
9793 merge_cmd_baton.tree_conflicted_abspaths = apr_hash_make(result_pool);
9794
9795 {
9796 svn_diff_tree_processor_t *merge_processor;
9797
9798 merge_processor = svn_diff__tree_processor_create(&merge_cmd_baton,
9799 scratch_pool);
9800
9801 merge_processor->dir_opened = merge_dir_opened;
9802 merge_processor->dir_changed = merge_dir_changed;
9803 merge_processor->dir_added = merge_dir_added;
9804 merge_processor->dir_deleted = merge_dir_deleted;
9805 merge_processor->dir_closed = merge_dir_closed;
9806
9807 merge_processor->file_opened = merge_file_opened;
9808 merge_processor->file_changed = merge_file_changed;
9809 merge_processor->file_added = merge_file_added;
9810 merge_processor->file_deleted = merge_file_deleted;
9811 /* Not interested in file_closed() */
9812
9813 merge_processor->node_absent = merge_node_absent;
9814
9815 processor = merge_processor;
9816 }
9817
9818 if (src_session)
9819 {
9820 SVN_ERR(svn_ra_get_session_url(src_session, &old_src_session_url,
9821 scratch_pool));
9822 ra_session1 = src_session;
9823 }
9824
9825 for (i = 0; i < merge_sources->nelts; i++)
9826 {
9827 svn_node_kind_t src1_kind;
9828 merge_source_t *source =
9829 APR_ARRAY_IDX(merge_sources, i, merge_source_t *);
9830 single_range_conflict_report_t *conflicted_range_report;
9831
9832 svn_pool_clear(iterpool);
9833
9834 /* Sanity check: if our left- and right-side merge sources are
9835 the same, there's nothing to here. */
9836 if ((strcmp(source->loc1->url, source->loc2->url) == 0)
9837 && (source->loc1->rev == source->loc2->rev))
9838 continue;
9839
9840 /* Establish RA sessions to our URLs, reuse where possible. */
9841 SVN_ERR(ensure_ra_session_url(&ra_session1, source->loc1->url,
9842 target->abspath, ctx, scratch_pool));
9843 SVN_ERR(ensure_ra_session_url(&ra_session2, source->loc2->url,
9844 target->abspath, ctx, scratch_pool));
9845
9846 /* Populate the portions of the merge context baton that need to
9847 be reset for each merge source iteration. */
9848 merge_cmd_baton.merge_source = *source;
9849 merge_cmd_baton.implicit_src_gap = NULL;
9850 merge_cmd_baton.conflicted_paths = NULL;
9851 merge_cmd_baton.paths_with_new_mergeinfo = NULL;
9852 merge_cmd_baton.paths_with_deleted_mergeinfo = NULL;
9853 merge_cmd_baton.ra_session1 = ra_session1;
9854 merge_cmd_baton.ra_session2 = ra_session2;
9855
9856 merge_cmd_baton.notify_begin.last_abspath = NULL;
9857
9858 /* Populate the portions of the merge context baton that require
9859 an RA session to set, but shouldn't be reset for each iteration. */
9860 if (! checked_mergeinfo_capability)
9861 {
9862 SVN_ERR(svn_ra_has_capability(ra_session1,
9863 &merge_cmd_baton.mergeinfo_capable,
9864 SVN_RA_CAPABILITY_MERGEINFO,
9865 iterpool));
9866 checked_mergeinfo_capability = TRUE;
9867 }
9868
9869 SVN_ERR(svn_ra_check_path(ra_session1, "", source->loc1->rev,
9870 &src1_kind, iterpool));
9871
9872 /* Run the merge; if there are conflicts, allow the callback to
9873 * resolve them, and if it resolves all of them, then run the
9874 * merge again with the remaining revision range, until it is all
9875 * done. */
9876 do
9877 {
9878 /* Merge as far as possible without resolving any conflicts */
9879 if (src1_kind != svn_node_dir)
9880 {
9881 SVN_ERR(do_file_merge(result_catalog, &conflicted_range_report,
9882 source, target->abspath,
9883 processor,
9884 sources_related,
9885 squelch_mergeinfo_notifications,
9886 &merge_cmd_baton, iterpool, iterpool));
9887 }
9888 else /* Directory */
9889 {
9890 SVN_ERR(do_directory_merge(result_catalog, &conflicted_range_report,
9891 source, target->abspath,
9892 processor,
9893 depth, squelch_mergeinfo_notifications,
9894 &merge_cmd_baton, iterpool, iterpool));
9895 }
9896
9897 /* Give the conflict resolver callback the opportunity to
9898 * resolve any conflicts that were raised. If it resolves all
9899 * of them, go around again to merge the next sub-range (if any). */
9900 if (conflicted_range_report && ctx->conflict_func2 && ! dry_run)
9901 {
9902 svn_boolean_t conflicts_remain;
9903
9904 SVN_ERR(svn_client__resolve_conflicts(
9905 &conflicts_remain, merge_cmd_baton.conflicted_paths,
9906 ctx, iterpool));
9907 if (conflicts_remain)
9908 break;
9909
9910 merge_cmd_baton.conflicted_paths = NULL;
9911 /* Caution: this source is in iterpool */
9912 source = conflicted_range_report->remaining_source;
9913 conflicted_range_report = NULL;
9914 }
9915 else
9916 break;
9917 }
9918 while (source);
9919
9920 /* The final mergeinfo on TARGET_WCPATH may itself elide. */
9921 if (! dry_run)
9922 SVN_ERR(svn_client__elide_mergeinfo(target->abspath, NULL,
9923 ctx, iterpool));
9924
9925 /* If conflicts occurred while merging any but the very last
9926 * range of a multi-pass merge, we raise an error that aborts
9927 * the merge. The user will be asked to resolve conflicts
9928 * before merging subsequent revision ranges. */
9929 if (conflicted_range_report)
9930 {
9931 *conflict_report = conflict_report_create(
9932 target->abspath, conflicted_range_report->conflicted_range,
9933 (i == merge_sources->nelts - 1
9934 && ! conflicted_range_report->remaining_source),
9935 result_pool);
9936 break;
9937 }
9938 }
9939
9940 if (! *conflict_report || (*conflict_report)->was_last_range)
9941 {
9942 /* Let everyone know we're finished here. */
9943 notify_merge_completed(target->abspath, ctx, iterpool);
9944 }
9945
9946 /* Does the caller want to know what the merge has done? */
9947 if (modified_subtrees)
9948 {
9949 *modified_subtrees =
9950 apr_hash_overlay(result_pool, *modified_subtrees,
9951 merge_cmd_baton.merged_abspaths);
9952 *modified_subtrees =
9953 apr_hash_overlay(result_pool, *modified_subtrees,
9954 merge_cmd_baton.added_abspaths);
9955 *modified_subtrees =
9956 apr_hash_overlay(result_pool, *modified_subtrees,
9957 merge_cmd_baton.skipped_abspaths);
9958 *modified_subtrees =
9959 apr_hash_overlay(result_pool, *modified_subtrees,
9960 merge_cmd_baton.tree_conflicted_abspaths);
9961 }
9962
9963 if (src_session)
9964 SVN_ERR(svn_ra_reparent(src_session, old_src_session_url, iterpool));
9965
9966 svn_pool_destroy(iterpool);
9967 return SVN_NO_ERROR;
9968 }
9969
9970 /* Perform a two-URL merge between URLs which are related, but neither
9971 is a direct ancestor of the other. This first does a real two-URL
9972 merge (unless this is record-only), followed by record-only merges
9973 to represent the changed mergeinfo.
9974
9975 Set *CONFLICT_REPORT to indicate if there were any conflicts, as in
9976 do_merge().
9977
9978 The diff to be merged is between SOURCE->loc1 (in URL1_RA_SESSION1)
9979 and SOURCE->loc2 (in URL2_RA_SESSION2); YCA is their youngest
9980 common ancestor.
9981
9982 SAME_REPOS must be true if and only if the source URLs are in the same
9983 repository as the target working copy.
9984
9985 DIFF_IGNORE_ANCESTRY is as in do_merge().
9986
9987 Other arguments are as in all of the public merge APIs.
9988
9989 *USE_SLEEP will be set TRUE if a sleep is required to ensure timestamp
9990 integrity, *USE_SLEEP will be unchanged if no sleep is required.
9991
9992 SCRATCH_POOL is used for all temporary allocations.
9993 */
9994 static svn_error_t *
merge_cousins_and_supplement_mergeinfo(conflict_report_t ** conflict_report,svn_boolean_t * use_sleep,const merge_target_t * target,svn_ra_session_t * URL1_ra_session,svn_ra_session_t * URL2_ra_session,const merge_source_t * source,const svn_client__pathrev_t * yca,svn_boolean_t same_repos,svn_depth_t depth,svn_boolean_t diff_ignore_ancestry,svn_boolean_t force_delete,svn_boolean_t record_only,svn_boolean_t dry_run,const apr_array_header_t * merge_options,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)9995 merge_cousins_and_supplement_mergeinfo(conflict_report_t **conflict_report,
9996 svn_boolean_t *use_sleep,
9997 const merge_target_t *target,
9998 svn_ra_session_t *URL1_ra_session,
9999 svn_ra_session_t *URL2_ra_session,
10000 const merge_source_t *source,
10001 const svn_client__pathrev_t *yca,
10002 svn_boolean_t same_repos,
10003 svn_depth_t depth,
10004 svn_boolean_t diff_ignore_ancestry,
10005 svn_boolean_t force_delete,
10006 svn_boolean_t record_only,
10007 svn_boolean_t dry_run,
10008 const apr_array_header_t *merge_options,
10009 svn_client_ctx_t *ctx,
10010 apr_pool_t *result_pool,
10011 apr_pool_t *scratch_pool)
10012 {
10013 apr_array_header_t *remove_sources, *add_sources;
10014 apr_hash_t *modified_subtrees = NULL;
10015
10016 /* Sure we could use SCRATCH_POOL throughout this function, but since this
10017 is a wrapper around three separate merges we'll create a subpool we can
10018 clear between each of the three. If the merge target has a lot of
10019 subtree mergeinfo, then this will help keep memory use in check. */
10020 apr_pool_t *subpool = svn_pool_create(scratch_pool);
10021
10022 assert(session_url_is(URL1_ra_session, source->loc1->url, scratch_pool));
10023 assert(session_url_is(URL2_ra_session, source->loc2->url, scratch_pool));
10024
10025 SVN_ERR_ASSERT(svn_dirent_is_absolute(target->abspath));
10026 SVN_ERR_ASSERT(! source->ancestral);
10027
10028 SVN_ERR(normalize_merge_sources_internal(
10029 &remove_sources, source->loc1,
10030 svn_rangelist__initialize(source->loc1->rev, yca->rev, TRUE,
10031 scratch_pool),
10032 URL1_ra_session, ctx, scratch_pool, subpool));
10033
10034 SVN_ERR(normalize_merge_sources_internal(
10035 &add_sources, source->loc2,
10036 svn_rangelist__initialize(yca->rev, source->loc2->rev, TRUE,
10037 scratch_pool),
10038 URL2_ra_session, ctx, scratch_pool, subpool));
10039
10040 *conflict_report = NULL;
10041
10042 /* If this isn't a record-only merge, we'll first do a stupid
10043 point-to-point merge... */
10044 if (! record_only)
10045 {
10046 apr_array_header_t *faux_sources =
10047 apr_array_make(scratch_pool, 1, sizeof(merge_source_t *));
10048
10049 modified_subtrees = apr_hash_make(scratch_pool);
10050 APR_ARRAY_PUSH(faux_sources, const merge_source_t *) = source;
10051 SVN_ERR(do_merge(&modified_subtrees, NULL, conflict_report, use_sleep,
10052 faux_sources, target,
10053 URL1_ra_session, TRUE, same_repos,
10054 FALSE /*ignore_mergeinfo*/, diff_ignore_ancestry,
10055 force_delete, dry_run, FALSE, NULL, TRUE,
10056 FALSE, depth, merge_options, ctx,
10057 scratch_pool, subpool));
10058 if (*conflict_report)
10059 {
10060 *conflict_report = conflict_report_dup(*conflict_report, result_pool);
10061 if (! (*conflict_report)->was_last_range)
10062 return SVN_NO_ERROR;
10063 }
10064 }
10065 else if (! same_repos)
10066 {
10067 return svn_error_create(SVN_ERR_INCORRECT_PARAMS, NULL,
10068 _("Merge from foreign repository is not "
10069 "compatible with mergeinfo modification"));
10070 }
10071
10072 /* ... and now, if we're doing the mergeinfo thang, we execute a
10073 pair of record-only merges using the real sources we've
10074 calculated.
10075
10076 Issue #3648: We don't actually perform these two record-only merges
10077 on the WC at first, but rather see what each would do and store that
10078 in two mergeinfo catalogs. We then merge the catalogs together and
10079 then record the result in the WC. This prevents the second record
10080 only merge from removing legitimate mergeinfo history, from the same
10081 source, that was made in prior merges. */
10082 if (same_repos && !dry_run)
10083 {
10084 svn_mergeinfo_catalog_t add_result_catalog =
10085 apr_hash_make(scratch_pool);
10086 svn_mergeinfo_catalog_t remove_result_catalog =
10087 apr_hash_make(scratch_pool);
10088
10089 notify_mergeinfo_recording(target->abspath, NULL, ctx, scratch_pool);
10090 svn_pool_clear(subpool);
10091 SVN_ERR(do_merge(NULL, add_result_catalog, conflict_report, use_sleep,
10092 add_sources, target,
10093 URL1_ra_session, TRUE, same_repos,
10094 FALSE /*ignore_mergeinfo*/, diff_ignore_ancestry,
10095 force_delete, dry_run, TRUE,
10096 modified_subtrees, TRUE,
10097 TRUE, depth, merge_options, ctx,
10098 scratch_pool, subpool));
10099 if (*conflict_report)
10100 {
10101 *conflict_report = conflict_report_dup(*conflict_report, result_pool);
10102 if (! (*conflict_report)->was_last_range)
10103 return SVN_NO_ERROR;
10104 }
10105 svn_pool_clear(subpool);
10106 SVN_ERR(do_merge(NULL, remove_result_catalog, conflict_report, use_sleep,
10107 remove_sources, target,
10108 URL1_ra_session, TRUE, same_repos,
10109 FALSE /*ignore_mergeinfo*/, diff_ignore_ancestry,
10110 force_delete, dry_run, TRUE,
10111 modified_subtrees, TRUE,
10112 TRUE, depth, merge_options, ctx,
10113 scratch_pool, subpool));
10114 if (*conflict_report)
10115 {
10116 *conflict_report = conflict_report_dup(*conflict_report, result_pool);
10117 if (! (*conflict_report)->was_last_range)
10118 return SVN_NO_ERROR;
10119 }
10120 SVN_ERR(svn_mergeinfo_catalog_merge(add_result_catalog,
10121 remove_result_catalog,
10122 scratch_pool, scratch_pool));
10123 SVN_ERR(svn_client__record_wc_mergeinfo_catalog(add_result_catalog,
10124 ctx, scratch_pool));
10125 }
10126
10127 svn_pool_destroy(subpool);
10128 return SVN_NO_ERROR;
10129 }
10130
10131 /* Perform checks to determine whether the working copy at TARGET_ABSPATH
10132 * can safely be used as a merge target. Checks are performed according to
10133 * the ALLOW_MIXED_REV, ALLOW_LOCAL_MODS, and ALLOW_SWITCHED_SUBTREES
10134 * parameters. If any checks fail, raise SVN_ERR_CLIENT_NOT_READY_TO_MERGE.
10135 *
10136 * E.g. if all the ALLOW_* parameters are FALSE, TARGET_ABSPATH must
10137 * be a single-revision, pristine, unswitched working copy.
10138 * In other words, it must reflect a subtree of the repository as found
10139 * at single revision -- although sparse checkouts are permitted. */
10140 static svn_error_t *
ensure_wc_is_suitable_merge_target(const char * target_abspath,svn_client_ctx_t * ctx,svn_boolean_t allow_mixed_rev,svn_boolean_t allow_local_mods,svn_boolean_t allow_switched_subtrees,apr_pool_t * scratch_pool)10141 ensure_wc_is_suitable_merge_target(const char *target_abspath,
10142 svn_client_ctx_t *ctx,
10143 svn_boolean_t allow_mixed_rev,
10144 svn_boolean_t allow_local_mods,
10145 svn_boolean_t allow_switched_subtrees,
10146 apr_pool_t *scratch_pool)
10147 {
10148 svn_node_kind_t target_kind;
10149
10150 /* Check the target exists. */
10151 SVN_ERR(svn_io_check_path(target_abspath, &target_kind, scratch_pool));
10152 if (target_kind == svn_node_none)
10153 return svn_error_createf(SVN_ERR_WC_PATH_NOT_FOUND, NULL,
10154 _("Path '%s' does not exist"),
10155 svn_dirent_local_style(target_abspath,
10156 scratch_pool));
10157 SVN_ERR(svn_wc_read_kind2(&target_kind, ctx->wc_ctx, target_abspath,
10158 FALSE, FALSE, scratch_pool));
10159 if (target_kind != svn_node_dir && target_kind != svn_node_file)
10160 return svn_error_createf(SVN_ERR_ILLEGAL_TARGET, NULL,
10161 _("Merge target '%s' does not exist in the "
10162 "working copy"), target_abspath);
10163
10164 /* Perform the mixed-revision check first because it's the cheapest one. */
10165 if (! allow_mixed_rev)
10166 {
10167 svn_revnum_t min_rev;
10168 svn_revnum_t max_rev;
10169
10170 SVN_ERR(svn_client_min_max_revisions(&min_rev, &max_rev, target_abspath,
10171 FALSE, ctx, scratch_pool));
10172
10173 if (!(SVN_IS_VALID_REVNUM(min_rev) && SVN_IS_VALID_REVNUM(max_rev)))
10174 {
10175 svn_boolean_t is_added;
10176
10177 /* Allow merge into added nodes. */
10178 SVN_ERR(svn_wc__node_is_added(&is_added, ctx->wc_ctx, target_abspath,
10179 scratch_pool));
10180 if (is_added)
10181 return SVN_NO_ERROR;
10182 else
10183 return svn_error_create(SVN_ERR_CLIENT_NOT_READY_TO_MERGE, NULL,
10184 _("Cannot determine revision of working "
10185 "copy"));
10186 }
10187
10188 if (min_rev != max_rev)
10189 return svn_error_createf(SVN_ERR_CLIENT_MERGE_UPDATE_REQUIRED, NULL,
10190 _("Cannot merge into mixed-revision working "
10191 "copy [%ld:%ld]; try updating first"),
10192 min_rev, max_rev);
10193 }
10194
10195 /* Next, check for switched subtrees. */
10196 if (! allow_switched_subtrees)
10197 {
10198 svn_boolean_t is_switched;
10199
10200 SVN_ERR(svn_wc__has_switched_subtrees(&is_switched, ctx->wc_ctx,
10201 target_abspath, NULL,
10202 scratch_pool));
10203 if (is_switched)
10204 return svn_error_create(SVN_ERR_CLIENT_NOT_READY_TO_MERGE, NULL,
10205 _("Cannot merge into a working copy "
10206 "with a switched subtree"));
10207 }
10208
10209 /* This is the most expensive check, so it is performed last.*/
10210 if (! allow_local_mods)
10211 {
10212 svn_boolean_t is_modified;
10213
10214 SVN_ERR(svn_wc__has_local_mods(&is_modified, ctx->wc_ctx,
10215 target_abspath,
10216 ctx->cancel_func,
10217 ctx->cancel_baton,
10218 scratch_pool));
10219 if (is_modified)
10220 return svn_error_create(SVN_ERR_CLIENT_NOT_READY_TO_MERGE, NULL,
10221 _("Cannot merge into a working copy "
10222 "that has local modifications"));
10223 }
10224
10225 return SVN_NO_ERROR;
10226 }
10227
10228 /* Throw an error if PATH_OR_URL is a path and REVISION isn't a repository
10229 * revision. */
10230 static svn_error_t *
ensure_wc_path_has_repo_revision(const char * path_or_url,const svn_opt_revision_t * revision,apr_pool_t * scratch_pool)10231 ensure_wc_path_has_repo_revision(const char *path_or_url,
10232 const svn_opt_revision_t *revision,
10233 apr_pool_t *scratch_pool)
10234 {
10235 if (revision->kind != svn_opt_revision_number
10236 && revision->kind != svn_opt_revision_date
10237 && revision->kind != svn_opt_revision_head
10238 && ! svn_path_is_url(path_or_url))
10239 return svn_error_createf(
10240 SVN_ERR_CLIENT_BAD_REVISION, NULL,
10241 _("Invalid merge source '%s'; a working copy path can only be "
10242 "used with a repository revision (a number, a date, or head)"),
10243 svn_dirent_local_style(path_or_url, scratch_pool));
10244 return SVN_NO_ERROR;
10245 }
10246
10247 /* "Open" the target WC for a merge. That means:
10248 * - find out its exact repository location
10249 * - check the WC for suitability (throw an error if unsuitable)
10250 *
10251 * Set *TARGET_P to a new, fully initialized, target description structure.
10252 *
10253 * ALLOW_MIXED_REV, ALLOW_LOCAL_MODS, ALLOW_SWITCHED_SUBTREES determine
10254 * whether the WC is deemed suitable; see ensure_wc_is_suitable_merge_target()
10255 * for details.
10256 *
10257 * If the node is locally added, the rev and URL will be null/invalid. Some
10258 * kinds of merge can use such a target; others can't.
10259 */
10260 static svn_error_t *
open_target_wc(merge_target_t ** target_p,const char * wc_abspath,svn_boolean_t allow_mixed_rev,svn_boolean_t allow_local_mods,svn_boolean_t allow_switched_subtrees,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)10261 open_target_wc(merge_target_t **target_p,
10262 const char *wc_abspath,
10263 svn_boolean_t allow_mixed_rev,
10264 svn_boolean_t allow_local_mods,
10265 svn_boolean_t allow_switched_subtrees,
10266 svn_client_ctx_t *ctx,
10267 apr_pool_t *result_pool,
10268 apr_pool_t *scratch_pool)
10269 {
10270 merge_target_t *target = apr_palloc(result_pool, sizeof(*target));
10271 svn_client__pathrev_t *origin;
10272
10273 target->abspath = apr_pstrdup(result_pool, wc_abspath);
10274
10275 SVN_ERR(svn_client__wc_node_get_origin(&origin, wc_abspath, ctx,
10276 result_pool, scratch_pool));
10277 if (origin)
10278 {
10279 target->loc = *origin;
10280 }
10281 else
10282 {
10283 svn_error_t *err;
10284 /* The node has no location in the repository. It's unversioned or
10285 * locally added or locally deleted.
10286 *
10287 * If it's locally added or deleted, find the repository root
10288 * URL and UUID anyway, and leave the node URL and revision as NULL
10289 * and INVALID. If it's unversioned, this will throw an error. */
10290 err = svn_wc__node_get_repos_info(NULL, NULL,
10291 &target->loc.repos_root_url,
10292 &target->loc.repos_uuid,
10293 ctx->wc_ctx, wc_abspath,
10294 result_pool, scratch_pool);
10295
10296 if (err)
10297 {
10298 if (err->apr_err != SVN_ERR_WC_PATH_NOT_FOUND
10299 && err->apr_err != SVN_ERR_WC_NOT_WORKING_COPY
10300 && err->apr_err != SVN_ERR_WC_UPGRADE_REQUIRED)
10301 return svn_error_trace(err);
10302
10303 return svn_error_createf(SVN_ERR_ILLEGAL_TARGET, err,
10304 _("Merge target '%s' does not exist in the "
10305 "working copy"),
10306 svn_dirent_local_style(wc_abspath,
10307 scratch_pool));
10308 }
10309
10310 target->loc.rev = SVN_INVALID_REVNUM;
10311 target->loc.url = NULL;
10312 }
10313
10314 SVN_ERR(ensure_wc_is_suitable_merge_target(
10315 wc_abspath, ctx,
10316 allow_mixed_rev, allow_local_mods, allow_switched_subtrees,
10317 scratch_pool));
10318
10319 *target_p = target;
10320 return SVN_NO_ERROR;
10321 }
10322
10323 /*-----------------------------------------------------------------------*/
10324
10325 /*** Public APIs ***/
10326
10327 /* The body of svn_client_merge5(), which see for details.
10328 *
10329 * If SOURCE1 @ REVISION1 is related to SOURCE2 @ REVISION2 then use merge
10330 * tracking (subject to other constraints -- see HONOR_MERGEINFO());
10331 * otherwise disable merge tracking.
10332 *
10333 * IGNORE_MERGEINFO and DIFF_IGNORE_ANCESTRY are as in do_merge().
10334 */
10335 static svn_error_t *
merge_locked(conflict_report_t ** conflict_report,const char * source1,const svn_opt_revision_t * revision1,const char * source2,const svn_opt_revision_t * revision2,const char * target_abspath,svn_depth_t depth,svn_boolean_t ignore_mergeinfo,svn_boolean_t diff_ignore_ancestry,svn_boolean_t force_delete,svn_boolean_t record_only,svn_boolean_t dry_run,svn_boolean_t allow_mixed_rev,const apr_array_header_t * merge_options,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)10336 merge_locked(conflict_report_t **conflict_report,
10337 const char *source1,
10338 const svn_opt_revision_t *revision1,
10339 const char *source2,
10340 const svn_opt_revision_t *revision2,
10341 const char *target_abspath,
10342 svn_depth_t depth,
10343 svn_boolean_t ignore_mergeinfo,
10344 svn_boolean_t diff_ignore_ancestry,
10345 svn_boolean_t force_delete,
10346 svn_boolean_t record_only,
10347 svn_boolean_t dry_run,
10348 svn_boolean_t allow_mixed_rev,
10349 const apr_array_header_t *merge_options,
10350 svn_client_ctx_t *ctx,
10351 apr_pool_t *result_pool,
10352 apr_pool_t *scratch_pool)
10353 {
10354 merge_target_t *target;
10355 svn_client__pathrev_t *source1_loc, *source2_loc;
10356 svn_boolean_t sources_related = FALSE;
10357 svn_ra_session_t *ra_session1, *ra_session2;
10358 apr_array_header_t *merge_sources;
10359 svn_error_t *err;
10360 svn_boolean_t use_sleep = FALSE;
10361 svn_client__pathrev_t *yca = NULL;
10362 apr_pool_t *sesspool;
10363 svn_boolean_t same_repos;
10364
10365 /* ### FIXME: This function really ought to do a history check on
10366 the left and right sides of the merge source, and -- if one is an
10367 ancestor of the other -- just call svn_client_merge_peg3() with
10368 the appropriate args. */
10369
10370 SVN_ERR(open_target_wc(&target, target_abspath,
10371 allow_mixed_rev, TRUE, TRUE,
10372 ctx, scratch_pool, scratch_pool));
10373
10374 /* Open RA sessions to both sides of our merge source, and resolve URLs
10375 * and revisions. */
10376 sesspool = svn_pool_create(scratch_pool);
10377 SVN_ERR(svn_client__ra_session_from_path2(
10378 &ra_session1, &source1_loc,
10379 source1, NULL, revision1, revision1, ctx, sesspool));
10380 SVN_ERR(svn_client__ra_session_from_path2(
10381 &ra_session2, &source2_loc,
10382 source2, NULL, revision2, revision2, ctx, sesspool));
10383
10384 /* We can't do a diff between different repositories. */
10385 /* ### We should also insist that the root URLs of the two sources match,
10386 * as we are only carrying around a single source-repos-root from now
10387 * on, and URL calculations will go wrong if they differ.
10388 * Alternatively, teach the code to cope with differing root URLs. */
10389 SVN_ERR(check_same_repos(source1_loc, source1_loc->url,
10390 source2_loc, source2_loc->url,
10391 FALSE /* strict_urls */, scratch_pool));
10392
10393 /* Do our working copy and sources come from the same repository? */
10394 same_repos = is_same_repos(&target->loc, source1_loc, TRUE /* strict_urls */);
10395
10396 /* Unless we're ignoring ancestry, see if the two sources are related. */
10397 if (! ignore_mergeinfo)
10398 SVN_ERR(svn_client__get_youngest_common_ancestor(
10399 &yca, source1_loc, source2_loc, ra_session1, ctx,
10400 scratch_pool, scratch_pool));
10401
10402 /* Check for a youngest common ancestor. If we have one, we'll be
10403 doing merge tracking.
10404
10405 So, given a requested merge of the differences between A and
10406 B, and a common ancestor of C, we will find ourselves in one of
10407 four positions, and four different approaches:
10408
10409 A == B == C there's nothing to merge
10410
10411 A == C != B we merge the changes between A (or C) and B
10412
10413 B == C != A we merge the changes between B (or C) and A
10414
10415 A != B != C we merge the changes between A and B without
10416 merge recording, then record-only two merges:
10417 from A to C, and from C to B
10418 */
10419 if (yca)
10420 {
10421 /* Note that our merge sources are related. */
10422 sources_related = TRUE;
10423
10424 /* If the common ancestor matches the right side of our merge,
10425 then we only need to reverse-merge the left side. */
10426 if ((strcmp(yca->url, source2_loc->url) == 0)
10427 && (yca->rev == source2_loc->rev))
10428 {
10429 SVN_ERR(normalize_merge_sources_internal(
10430 &merge_sources, source1_loc,
10431 svn_rangelist__initialize(source1_loc->rev, yca->rev, TRUE,
10432 scratch_pool),
10433 ra_session1, ctx, scratch_pool, scratch_pool));
10434 }
10435 /* If the common ancestor matches the left side of our merge,
10436 then we only need to merge the right side. */
10437 else if ((strcmp(yca->url, source1_loc->url) == 0)
10438 && (yca->rev == source1_loc->rev))
10439 {
10440 SVN_ERR(normalize_merge_sources_internal(
10441 &merge_sources, source2_loc,
10442 svn_rangelist__initialize(yca->rev, source2_loc->rev, TRUE,
10443 scratch_pool),
10444 ra_session2, ctx, scratch_pool, scratch_pool));
10445 }
10446 /* And otherwise, we need to do both: reverse merge the left
10447 side, and merge the right. */
10448 else
10449 {
10450 merge_source_t source;
10451
10452 source.loc1 = source1_loc;
10453 source.loc2 = source2_loc;
10454 source.ancestral = FALSE;
10455
10456 err = merge_cousins_and_supplement_mergeinfo(conflict_report,
10457 &use_sleep,
10458 target,
10459 ra_session1,
10460 ra_session2,
10461 &source,
10462 yca,
10463 same_repos,
10464 depth,
10465 diff_ignore_ancestry,
10466 force_delete,
10467 record_only, dry_run,
10468 merge_options,
10469 ctx,
10470 result_pool,
10471 scratch_pool);
10472 /* Close our temporary RA sessions (this could've happened
10473 after the second call to normalize_merge_sources() inside
10474 the merge_cousins_and_supplement_mergeinfo() routine). */
10475 svn_pool_destroy(sesspool);
10476
10477 if (use_sleep)
10478 svn_io_sleep_for_timestamps(target->abspath, scratch_pool);
10479
10480 SVN_ERR(err);
10481 return SVN_NO_ERROR;
10482 }
10483 }
10484 else
10485 {
10486 /* Build a single-item merge_source_t array. */
10487 merge_sources = apr_array_make(scratch_pool, 1, sizeof(merge_source_t *));
10488 APR_ARRAY_PUSH(merge_sources, merge_source_t *)
10489 = merge_source_create(source1_loc, source2_loc, FALSE, scratch_pool);
10490 }
10491
10492 err = do_merge(NULL, NULL, conflict_report, &use_sleep,
10493 merge_sources, target,
10494 ra_session1, sources_related, same_repos,
10495 ignore_mergeinfo, diff_ignore_ancestry, force_delete, dry_run,
10496 record_only, NULL, FALSE, FALSE, depth, merge_options,
10497 ctx, result_pool, scratch_pool);
10498
10499 /* Close our temporary RA sessions. */
10500 svn_pool_destroy(sesspool);
10501
10502 if (use_sleep)
10503 svn_io_sleep_for_timestamps(target->abspath, scratch_pool);
10504
10505 SVN_ERR(err);
10506 return SVN_NO_ERROR;
10507 }
10508
10509 /* Set *TARGET_ABSPATH to the absolute path of, and *LOCK_ABSPATH to
10510 the absolute path to lock for, TARGET_WCPATH. */
10511 static svn_error_t *
get_target_and_lock_abspath(const char ** target_abspath,const char ** lock_abspath,const char * target_wcpath,svn_client_ctx_t * ctx,apr_pool_t * result_pool)10512 get_target_and_lock_abspath(const char **target_abspath,
10513 const char **lock_abspath,
10514 const char *target_wcpath,
10515 svn_client_ctx_t *ctx,
10516 apr_pool_t *result_pool)
10517 {
10518 svn_node_kind_t kind;
10519 SVN_ERR(svn_dirent_get_absolute(target_abspath, target_wcpath,
10520 result_pool));
10521 SVN_ERR(svn_wc_read_kind2(&kind, ctx->wc_ctx, *target_abspath,
10522 FALSE, FALSE, result_pool));
10523 if (kind == svn_node_dir)
10524 *lock_abspath = *target_abspath;
10525 else
10526 *lock_abspath = svn_dirent_dirname(*target_abspath, result_pool);
10527
10528 return SVN_NO_ERROR;
10529 }
10530
10531 svn_error_t *
svn_client_merge5(const char * source1,const svn_opt_revision_t * revision1,const char * source2,const svn_opt_revision_t * revision2,const char * target_wcpath,svn_depth_t depth,svn_boolean_t ignore_mergeinfo,svn_boolean_t diff_ignore_ancestry,svn_boolean_t force_delete,svn_boolean_t record_only,svn_boolean_t dry_run,svn_boolean_t allow_mixed_rev,const apr_array_header_t * merge_options,svn_client_ctx_t * ctx,apr_pool_t * pool)10532 svn_client_merge5(const char *source1,
10533 const svn_opt_revision_t *revision1,
10534 const char *source2,
10535 const svn_opt_revision_t *revision2,
10536 const char *target_wcpath,
10537 svn_depth_t depth,
10538 svn_boolean_t ignore_mergeinfo,
10539 svn_boolean_t diff_ignore_ancestry,
10540 svn_boolean_t force_delete,
10541 svn_boolean_t record_only,
10542 svn_boolean_t dry_run,
10543 svn_boolean_t allow_mixed_rev,
10544 const apr_array_header_t *merge_options,
10545 svn_client_ctx_t *ctx,
10546 apr_pool_t *pool)
10547 {
10548 const char *target_abspath, *lock_abspath;
10549 conflict_report_t *conflict_report;
10550
10551 /* Sanity check our input -- we require specified revisions,
10552 * and either 2 paths or 2 URLs. */
10553 if ((revision1->kind == svn_opt_revision_unspecified)
10554 || (revision2->kind == svn_opt_revision_unspecified))
10555 return svn_error_create(SVN_ERR_CLIENT_BAD_REVISION, NULL,
10556 _("Not all required revisions are specified"));
10557 if (svn_path_is_url(source1) != svn_path_is_url(source2))
10558 return svn_error_create(SVN_ERR_ILLEGAL_TARGET, NULL,
10559 _("Merge sources must both be "
10560 "either paths or URLs"));
10561 /* A WC path must be used with a repository revision, as we can't
10562 * (currently) use the WC itself as a source, we can only read the URL
10563 * from it and use that. */
10564 SVN_ERR(ensure_wc_path_has_repo_revision(source1, revision1, pool));
10565 SVN_ERR(ensure_wc_path_has_repo_revision(source2, revision2, pool));
10566
10567 SVN_ERR(get_target_and_lock_abspath(&target_abspath, &lock_abspath,
10568 target_wcpath, ctx, pool));
10569
10570 if (!dry_run)
10571 SVN_WC__CALL_WITH_WRITE_LOCK(
10572 merge_locked(&conflict_report,
10573 source1, revision1, source2, revision2,
10574 target_abspath, depth, ignore_mergeinfo,
10575 diff_ignore_ancestry,
10576 force_delete, record_only, dry_run,
10577 allow_mixed_rev, merge_options, ctx, pool, pool),
10578 ctx->wc_ctx, lock_abspath, FALSE /* lock_anchor */, pool);
10579 else
10580 SVN_ERR(merge_locked(&conflict_report,
10581 source1, revision1, source2, revision2,
10582 target_abspath, depth, ignore_mergeinfo,
10583 diff_ignore_ancestry,
10584 force_delete, record_only, dry_run,
10585 allow_mixed_rev, merge_options, ctx, pool, pool));
10586
10587 SVN_ERR(make_merge_conflict_error(conflict_report, pool));
10588 return SVN_NO_ERROR;
10589 }
10590
10591
10592 /* Check if mergeinfo for a given path is described explicitly or via
10593 inheritance in a mergeinfo catalog.
10594
10595 If REPOS_REL_PATH exists in CATALOG and has mergeinfo containing
10596 MERGEINFO, then set *IN_CATALOG to TRUE. If REPOS_REL_PATH does
10597 not exist in CATALOG, then find its nearest parent which does exist.
10598 If the mergeinfo REPOS_REL_PATH would inherit from that parent
10599 contains MERGEINFO then set *IN_CATALOG to TRUE. Set *IN_CATALOG
10600 to FALSE in all other cases.
10601
10602 Set *CAT_KEY_PATH to the key path in CATALOG for REPOS_REL_PATH's
10603 explicit or inherited mergeinfo. If no explicit or inherited mergeinfo
10604 is found for REPOS_REL_PATH then set *CAT_KEY_PATH to NULL.
10605
10606 User RESULT_POOL to allocate *CAT_KEY_PATH. Use SCRATCH_POOL for
10607 temporary allocations. */
10608 static svn_error_t *
mergeinfo_in_catalog(svn_boolean_t * in_catalog,const char ** cat_key_path,const char * repos_rel_path,svn_mergeinfo_t mergeinfo,svn_mergeinfo_catalog_t catalog,apr_pool_t * result_pool,apr_pool_t * scratch_pool)10609 mergeinfo_in_catalog(svn_boolean_t *in_catalog,
10610 const char **cat_key_path,
10611 const char *repos_rel_path,
10612 svn_mergeinfo_t mergeinfo,
10613 svn_mergeinfo_catalog_t catalog,
10614 apr_pool_t *result_pool,
10615 apr_pool_t *scratch_pool)
10616 {
10617 const char *walk_path = NULL;
10618
10619 *in_catalog = FALSE;
10620 *cat_key_path = NULL;
10621
10622 if (mergeinfo && catalog && apr_hash_count(catalog))
10623 {
10624 const char *path = repos_rel_path;
10625
10626 /* Start with the assumption there is no explicit or inherited
10627 mergeinfo for REPOS_REL_PATH in CATALOG. */
10628 svn_mergeinfo_t mergeinfo_in_cat = NULL;
10629
10630 while (1)
10631 {
10632 mergeinfo_in_cat = svn_hash_gets(catalog, path);
10633
10634 if (mergeinfo_in_cat) /* Found it! */
10635 {
10636 *cat_key_path = apr_pstrdup(result_pool, path);
10637 break;
10638 }
10639 else /* Look for inherited mergeinfo. */
10640 {
10641 walk_path = svn_relpath_join(svn_relpath_basename(path,
10642 scratch_pool),
10643 walk_path ? walk_path : "",
10644 scratch_pool);
10645 path = svn_relpath_dirname(path, scratch_pool);
10646
10647 if (path[0] == '\0') /* No mergeinfo to inherit. */
10648 break;
10649 }
10650 }
10651
10652 if (mergeinfo_in_cat)
10653 {
10654 if (walk_path)
10655 SVN_ERR(svn_mergeinfo__add_suffix_to_mergeinfo(&mergeinfo_in_cat,
10656 mergeinfo_in_cat,
10657 walk_path,
10658 scratch_pool,
10659 scratch_pool));
10660 SVN_ERR(svn_mergeinfo_intersect2(&mergeinfo_in_cat,
10661 mergeinfo_in_cat, mergeinfo,
10662 TRUE,
10663 scratch_pool, scratch_pool));
10664 SVN_ERR(svn_mergeinfo__equals(in_catalog, mergeinfo_in_cat,
10665 mergeinfo, TRUE, scratch_pool));
10666 }
10667 }
10668
10669 return SVN_NO_ERROR;
10670 }
10671
10672 /* A svn_log_entry_receiver_t baton for log_find_operative_revs(). */
10673 typedef struct log_find_operative_baton_t
10674 {
10675 /* The catalog of explicit mergeinfo on a reintegrate source. */
10676 svn_mergeinfo_catalog_t merged_catalog;
10677
10678 /* The catalog of unmerged history from the reintegrate target to
10679 the source which we will create. Allocated in RESULT_POOL. */
10680 svn_mergeinfo_catalog_t unmerged_catalog;
10681
10682 /* The repository absolute path of the reintegrate target. */
10683 const char *target_fspath;
10684
10685 /* The path of the reintegrate source relative to the repository root. */
10686 const char *source_repos_rel_path;
10687
10688 apr_pool_t *result_pool;
10689 } log_find_operative_baton_t;
10690
10691 /* A svn_log_entry_receiver_t callback for find_unsynced_ranges(). */
10692 static svn_error_t *
log_find_operative_revs(void * baton,svn_log_entry_t * log_entry,apr_pool_t * pool)10693 log_find_operative_revs(void *baton,
10694 svn_log_entry_t *log_entry,
10695 apr_pool_t *pool)
10696 {
10697 log_find_operative_baton_t *log_baton = baton;
10698 apr_hash_index_t *hi;
10699 svn_revnum_t revision;
10700
10701 /* It's possible that authz restrictions on the merge source prevent us
10702 from knowing about any of the changes for LOG_ENTRY->REVISION. */
10703 if (!log_entry->changed_paths2)
10704 return SVN_NO_ERROR;
10705
10706 revision = log_entry->revision;
10707
10708 for (hi = apr_hash_first(pool, log_entry->changed_paths2);
10709 hi;
10710 hi = apr_hash_next(hi))
10711 {
10712 const char *subtree_missing_this_rev;
10713 const char *path = svn__apr_hash_index_key(hi);
10714 const char *rel_path;
10715 const char *source_rel_path;
10716 svn_boolean_t in_catalog;
10717 svn_mergeinfo_t log_entry_as_mergeinfo;
10718
10719 rel_path = svn_fspath__skip_ancestor(log_baton->target_fspath, path);
10720 /* Easy out: The path is not within the tree of interest. */
10721 if (rel_path == NULL)
10722 continue;
10723
10724 source_rel_path = svn_relpath_join(log_baton->source_repos_rel_path,
10725 rel_path, pool);
10726
10727 SVN_ERR(svn_mergeinfo_parse(&log_entry_as_mergeinfo,
10728 apr_psprintf(pool, "%s:%ld",
10729 path, revision),
10730 pool));
10731
10732 SVN_ERR(mergeinfo_in_catalog(&in_catalog, &subtree_missing_this_rev,
10733 source_rel_path, log_entry_as_mergeinfo,
10734 log_baton->merged_catalog,
10735 pool, pool));
10736
10737 if (!in_catalog)
10738 {
10739 svn_mergeinfo_t unmerged_for_key;
10740 const char *suffix, *missing_path;
10741
10742 /* If there is no mergeinfo on the source tree we'll say
10743 the "subtree" missing this revision is the root of the
10744 source. */
10745 if (!subtree_missing_this_rev)
10746 subtree_missing_this_rev = log_baton->source_repos_rel_path;
10747
10748 suffix = svn_relpath_skip_ancestor(subtree_missing_this_rev,
10749 source_rel_path);
10750 if (suffix && suffix[0] != '\0')
10751 {
10752 missing_path = apr_pstrmemdup(pool, path,
10753 strlen(path) - strlen(suffix) - 1);
10754 }
10755 else
10756 {
10757 missing_path = path;
10758 }
10759
10760 SVN_ERR(svn_mergeinfo_parse(&log_entry_as_mergeinfo,
10761 apr_psprintf(pool, "%s:%ld",
10762 missing_path, revision),
10763 log_baton->result_pool));
10764 unmerged_for_key = svn_hash_gets(log_baton->unmerged_catalog,
10765 subtree_missing_this_rev);
10766
10767 if (unmerged_for_key)
10768 {
10769 SVN_ERR(svn_mergeinfo_merge2(unmerged_for_key,
10770 log_entry_as_mergeinfo,
10771 log_baton->result_pool,
10772 pool));
10773 }
10774 else
10775 {
10776 svn_hash_sets(log_baton->unmerged_catalog,
10777 apr_pstrdup(log_baton->result_pool,
10778 subtree_missing_this_rev),
10779 log_entry_as_mergeinfo);
10780 }
10781
10782 }
10783 }
10784 return SVN_NO_ERROR;
10785 }
10786
10787 /* Determine if the mergeinfo on a reintegrate source SOURCE_LOC,
10788 reflects that the source is fully synced with the reintegrate target
10789 TARGET_LOC, even if a naive interpretation of the source's
10790 mergeinfo says otherwise -- See issue #3577.
10791
10792 UNMERGED_CATALOG represents the history (as mergeinfo) from
10793 TARGET_LOC that is not represented in SOURCE_LOC's
10794 explicit/inherited mergeinfo as represented by MERGED_CATALOG.
10795 MERGED_CATALOG may be empty if the source has no explicit or inherited
10796 mergeinfo.
10797
10798 Check that all of the unmerged revisions in UNMERGED_CATALOG's
10799 mergeinfos are "phantoms", that is, one of the following conditions holds:
10800
10801 1) The revision affects no corresponding paths in SOURCE_LOC.
10802
10803 2) The revision affects corresponding paths in SOURCE_LOC,
10804 but based on the mergeinfo in MERGED_CATALOG, the change was
10805 previously merged.
10806
10807 Make a deep copy, allocated in RESULT_POOL, of any portions of
10808 UNMERGED_CATALOG that are not phantoms, to TRUE_UNMERGED_CATALOG.
10809
10810 Note: The keys in all mergeinfo catalogs used here are relative to the
10811 root of the repository.
10812
10813 RA_SESSION is an RA session open to the repository of TARGET_LOC; it may
10814 be temporarily reparented within this function.
10815
10816 Use SCRATCH_POOL for all temporary allocations. */
10817 static svn_error_t *
find_unsynced_ranges(const svn_client__pathrev_t * source_loc,const svn_client__pathrev_t * target_loc,svn_mergeinfo_catalog_t unmerged_catalog,svn_mergeinfo_catalog_t merged_catalog,svn_mergeinfo_catalog_t true_unmerged_catalog,svn_ra_session_t * ra_session,apr_pool_t * result_pool,apr_pool_t * scratch_pool)10818 find_unsynced_ranges(const svn_client__pathrev_t *source_loc,
10819 const svn_client__pathrev_t *target_loc,
10820 svn_mergeinfo_catalog_t unmerged_catalog,
10821 svn_mergeinfo_catalog_t merged_catalog,
10822 svn_mergeinfo_catalog_t true_unmerged_catalog,
10823 svn_ra_session_t *ra_session,
10824 apr_pool_t *result_pool,
10825 apr_pool_t *scratch_pool)
10826 {
10827 svn_rangelist_t *potentially_unmerged_ranges = NULL;
10828
10829 /* Convert all the unmerged history to a rangelist. */
10830 if (apr_hash_count(unmerged_catalog))
10831 {
10832 apr_hash_index_t *hi_catalog;
10833
10834 potentially_unmerged_ranges =
10835 apr_array_make(scratch_pool, 1, sizeof(svn_merge_range_t *));
10836
10837 for (hi_catalog = apr_hash_first(scratch_pool, unmerged_catalog);
10838 hi_catalog;
10839 hi_catalog = apr_hash_next(hi_catalog))
10840 {
10841 svn_mergeinfo_t mergeinfo = svn__apr_hash_index_val(hi_catalog);
10842
10843 SVN_ERR(svn_rangelist__merge_many(potentially_unmerged_ranges,
10844 mergeinfo,
10845 scratch_pool, scratch_pool));
10846 }
10847 }
10848
10849 /* Find any unmerged revisions which both affect the source and
10850 are not yet merged to it. */
10851 if (potentially_unmerged_ranges)
10852 {
10853 svn_revnum_t oldest_rev =
10854 (APR_ARRAY_IDX(potentially_unmerged_ranges,
10855 0,
10856 svn_merge_range_t *))->start + 1;
10857 svn_revnum_t youngest_rev =
10858 (APR_ARRAY_IDX(potentially_unmerged_ranges,
10859 potentially_unmerged_ranges->nelts - 1,
10860 svn_merge_range_t *))->end;
10861 log_find_operative_baton_t log_baton;
10862 const char *old_session_url;
10863 svn_error_t *err;
10864
10865 log_baton.merged_catalog = merged_catalog;
10866 log_baton.unmerged_catalog = true_unmerged_catalog;
10867 log_baton.source_repos_rel_path
10868 = svn_client__pathrev_relpath(source_loc, scratch_pool);
10869 log_baton.target_fspath
10870 = svn_client__pathrev_fspath(target_loc, scratch_pool);
10871 log_baton.result_pool = result_pool;
10872
10873 SVN_ERR(svn_client__ensure_ra_session_url(
10874 &old_session_url, ra_session, target_loc->url, scratch_pool));
10875 err = get_log(ra_session, "", youngest_rev, oldest_rev,
10876 TRUE, /* discover_changed_paths */
10877 log_find_operative_revs, &log_baton,
10878 scratch_pool);
10879 SVN_ERR(svn_error_compose_create(
10880 err, svn_ra_reparent(ra_session, old_session_url, scratch_pool)));
10881 }
10882
10883 return SVN_NO_ERROR;
10884 }
10885
10886
10887 /* Find the youngest revision that has been merged from target to source.
10888 *
10889 * If any location in TARGET_HISTORY_AS_MERGEINFO is mentioned in
10890 * SOURCE_MERGEINFO, then we know that at least one merge was done from the
10891 * target to the source. In that case, set *YOUNGEST_MERGED_REV to the
10892 * youngest revision of that intersection (unless *YOUNGEST_MERGED_REV is
10893 * already younger than that). Otherwise, leave *YOUNGEST_MERGED_REV alone.
10894 */
10895 static svn_error_t *
find_youngest_merged_rev(svn_revnum_t * youngest_merged_rev,svn_mergeinfo_t target_history_as_mergeinfo,svn_mergeinfo_t source_mergeinfo,apr_pool_t * scratch_pool)10896 find_youngest_merged_rev(svn_revnum_t *youngest_merged_rev,
10897 svn_mergeinfo_t target_history_as_mergeinfo,
10898 svn_mergeinfo_t source_mergeinfo,
10899 apr_pool_t *scratch_pool)
10900 {
10901 svn_mergeinfo_t explicit_source_target_history_intersection;
10902
10903 SVN_ERR(svn_mergeinfo_intersect2(
10904 &explicit_source_target_history_intersection,
10905 source_mergeinfo, target_history_as_mergeinfo, TRUE,
10906 scratch_pool, scratch_pool));
10907 if (apr_hash_count(explicit_source_target_history_intersection))
10908 {
10909 svn_revnum_t old_rev, young_rev;
10910
10911 /* Keep track of the youngest revision merged from target to source. */
10912 SVN_ERR(svn_mergeinfo__get_range_endpoints(
10913 &young_rev, &old_rev,
10914 explicit_source_target_history_intersection, scratch_pool));
10915 if (!SVN_IS_VALID_REVNUM(*youngest_merged_rev)
10916 || (young_rev > *youngest_merged_rev))
10917 *youngest_merged_rev = young_rev;
10918 }
10919
10920 return SVN_NO_ERROR;
10921 }
10922
10923 /* Set *FILTERED_MERGEINFO_P to the parts of TARGET_HISTORY_AS_MERGEINFO
10924 * that are not present in the source branch.
10925 *
10926 * SOURCE_MERGEINFO is the explicit or inherited mergeinfo of the source
10927 * branch SOURCE_PATHREV. Extend SOURCE_MERGEINFO, modifying it in
10928 * place, to include the natural history (implicit mergeinfo) of
10929 * SOURCE_PATHREV. ### But make these additions in SCRATCH_POOL.
10930 *
10931 * SOURCE_RA_SESSION is an RA session open to the repository containing
10932 * SOURCE_PATHREV; it may be temporarily reparented within this function.
10933 *
10934 * ### [JAF] This function is named '..._subroutine' simply because I
10935 * factored it out based on code similarity, without knowing what it's
10936 * purpose is. We should clarify its purpose and choose a better name.
10937 */
10938 static svn_error_t *
find_unmerged_mergeinfo_subroutine(svn_mergeinfo_t * filtered_mergeinfo_p,svn_mergeinfo_t target_history_as_mergeinfo,svn_mergeinfo_t source_mergeinfo,const svn_client__pathrev_t * source_pathrev,svn_ra_session_t * source_ra_session,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)10939 find_unmerged_mergeinfo_subroutine(svn_mergeinfo_t *filtered_mergeinfo_p,
10940 svn_mergeinfo_t target_history_as_mergeinfo,
10941 svn_mergeinfo_t source_mergeinfo,
10942 const svn_client__pathrev_t *source_pathrev,
10943 svn_ra_session_t *source_ra_session,
10944 svn_client_ctx_t *ctx,
10945 apr_pool_t *result_pool,
10946 apr_pool_t *scratch_pool)
10947 {
10948 svn_mergeinfo_t source_history_as_mergeinfo;
10949
10950 /* Get the source path's natural history and merge it into source
10951 path's explicit or inherited mergeinfo. */
10952 SVN_ERR(svn_client__get_history_as_mergeinfo(
10953 &source_history_as_mergeinfo, NULL /* has_rev_zero_history */,
10954 source_pathrev, source_pathrev->rev, SVN_INVALID_REVNUM,
10955 source_ra_session, ctx, scratch_pool));
10956 SVN_ERR(svn_mergeinfo_merge2(source_mergeinfo,
10957 source_history_as_mergeinfo,
10958 scratch_pool, scratch_pool));
10959
10960 /* Now source_mergeinfo represents everything we know about
10961 source_path's history. Now we need to know what part, if any, of the
10962 corresponding target's history is *not* part of source_path's total
10963 history; because it is neither shared history nor was it ever merged
10964 from the target to the source. */
10965 SVN_ERR(svn_mergeinfo_remove2(filtered_mergeinfo_p,
10966 source_mergeinfo,
10967 target_history_as_mergeinfo, TRUE,
10968 result_pool, scratch_pool));
10969 return SVN_NO_ERROR;
10970 }
10971
10972 /* Helper for calculate_left_hand_side() which produces a mergeinfo catalog
10973 describing what parts of of the reintegrate target have not previously been
10974 merged to the reintegrate source.
10975
10976 SOURCE_CATALOG is the collection of explicit mergeinfo on SOURCE_LOC and
10977 all its children, i.e. the mergeinfo catalog for the reintegrate source.
10978
10979 TARGET_HISTORY_HASH is a hash of (const char *) paths mapped to
10980 svn_mergeinfo_t representing the location history. Each of these
10981 path keys represent a path in the reintegrate target, relative to the
10982 repository root, which has explicit mergeinfo and/or is the reintegrate
10983 target itself. The svn_mergeinfo_t's contain the natural history of each
10984 path@TARGET_REV. Effectively this is the mergeinfo catalog on the
10985 reintegrate target.
10986
10987 YC_ANCESTOR_REV is the revision of the youngest common ancestor of the
10988 reintegrate source and the reintegrate target.
10989
10990 SOURCE_LOC is the reintegrate source.
10991
10992 SOURCE_RA_SESSION is a session opened to the URL of SOURCE_LOC
10993 and TARGET_RA_SESSION is open to TARGET->loc.url.
10994
10995 For each entry in TARGET_HISTORY_HASH check that the history it
10996 represents is contained in either the explicit mergeinfo for the
10997 corresponding path in SOURCE_CATALOG, the corresponding path's inherited
10998 mergeinfo (if no explicit mergeinfo for the path is found in
10999 SOURCE_CATALOG), or the corresponding path's natural history. Populate
11000 *UNMERGED_TO_SOURCE_CATALOG with the corresponding source paths mapped to
11001 the mergeinfo from the target's natural history which is *not* found. Also
11002 include any mergeinfo from SOURCE_CATALOG which explicitly describes the
11003 target's history but for which *no* entry was found in
11004 TARGET_HISTORY_HASH.
11005
11006 If no part of TARGET_HISTORY_HASH is found in SOURCE_CATALOG set
11007 *YOUNGEST_MERGED_REV to SVN_INVALID_REVNUM; otherwise set it to the youngest
11008 revision previously merged from the target to the source, and filter
11009 *UNMERGED_TO_SOURCE_CATALOG so that it contains no ranges greater than
11010 *YOUNGEST_MERGED_REV.
11011
11012 *UNMERGED_TO_SOURCE_CATALOG is (deeply) allocated in RESULT_POOL.
11013 SCRATCH_POOL is used for all temporary allocations. */
11014 static svn_error_t *
find_unmerged_mergeinfo(svn_mergeinfo_catalog_t * unmerged_to_source_catalog,svn_revnum_t * youngest_merged_rev,svn_revnum_t yc_ancestor_rev,svn_mergeinfo_catalog_t source_catalog,apr_hash_t * target_history_hash,const svn_client__pathrev_t * source_loc,const merge_target_t * target,svn_ra_session_t * source_ra_session,svn_ra_session_t * target_ra_session,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)11015 find_unmerged_mergeinfo(svn_mergeinfo_catalog_t *unmerged_to_source_catalog,
11016 svn_revnum_t *youngest_merged_rev,
11017 svn_revnum_t yc_ancestor_rev,
11018 svn_mergeinfo_catalog_t source_catalog,
11019 apr_hash_t *target_history_hash,
11020 const svn_client__pathrev_t *source_loc,
11021 const merge_target_t *target,
11022 svn_ra_session_t *source_ra_session,
11023 svn_ra_session_t *target_ra_session,
11024 svn_client_ctx_t *ctx,
11025 apr_pool_t *result_pool,
11026 apr_pool_t *scratch_pool)
11027 {
11028 const char *source_repos_rel_path
11029 = svn_client__pathrev_relpath(source_loc, scratch_pool);
11030 const char *target_repos_rel_path
11031 = svn_client__pathrev_relpath(&target->loc, scratch_pool);
11032 apr_hash_index_t *hi;
11033 svn_mergeinfo_catalog_t new_catalog = apr_hash_make(result_pool);
11034 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
11035
11036 assert(session_url_is(source_ra_session, source_loc->url, scratch_pool));
11037 assert(session_url_is(target_ra_session, target->loc.url, scratch_pool));
11038
11039 *youngest_merged_rev = SVN_INVALID_REVNUM;
11040
11041 /* Examine the natural history of each path in the reintegrate target
11042 with explicit mergeinfo. */
11043 for (hi = apr_hash_first(scratch_pool, target_history_hash);
11044 hi;
11045 hi = apr_hash_next(hi))
11046 {
11047 const char *target_path = svn__apr_hash_index_key(hi);
11048 svn_mergeinfo_t target_history_as_mergeinfo = svn__apr_hash_index_val(hi);
11049 const char *path_rel_to_session
11050 = svn_relpath_skip_ancestor(target_repos_rel_path, target_path);
11051 const char *source_path;
11052 svn_client__pathrev_t *source_pathrev;
11053 svn_mergeinfo_t source_mergeinfo, filtered_mergeinfo;
11054
11055 svn_pool_clear(iterpool);
11056
11057 source_path = svn_relpath_join(source_repos_rel_path,
11058 path_rel_to_session, iterpool);
11059 source_pathrev = svn_client__pathrev_join_relpath(
11060 source_loc, path_rel_to_session, iterpool);
11061
11062 /* Remove any target history that is also part of the source's history,
11063 i.e. their common ancestry. By definition this has already been
11064 "merged" from the target to the source. If the source has explicit
11065 self referential mergeinfo it would intersect with the target's
11066 history below, making it appear that some merges had been done from
11067 the target to the source, when this might not actually be the case. */
11068 SVN_ERR(svn_mergeinfo__filter_mergeinfo_by_ranges(
11069 &target_history_as_mergeinfo, target_history_as_mergeinfo,
11070 source_loc->rev, yc_ancestor_rev, TRUE, iterpool, iterpool));
11071
11072 /* Look for any explicit mergeinfo on the source path corresponding to
11073 the target path. If we find any remove that from SOURCE_CATALOG.
11074 When this iteration over TARGET_HISTORY_HASH is complete all that
11075 should be left in SOURCE_CATALOG are subtrees that have explicit
11076 mergeinfo on the reintegrate source where there is no corresponding
11077 explicit mergeinfo on the reintegrate target. */
11078 source_mergeinfo = svn_hash_gets(source_catalog, source_path);
11079 if (source_mergeinfo)
11080 {
11081 svn_hash_sets(source_catalog, source_path, NULL);
11082
11083 SVN_ERR(find_youngest_merged_rev(youngest_merged_rev,
11084 target_history_as_mergeinfo,
11085 source_mergeinfo,
11086 iterpool));
11087 }
11088 else
11089 {
11090 /* There is no mergeinfo on source_path *or* source_path doesn't
11091 exist at all. If simply doesn't exist we can ignore it
11092 altogether. */
11093 svn_node_kind_t kind;
11094
11095 SVN_ERR(svn_ra_check_path(source_ra_session,
11096 path_rel_to_session,
11097 source_loc->rev, &kind, iterpool));
11098 if (kind == svn_node_none)
11099 continue;
11100 /* Else source_path does exist though it has no explicit mergeinfo.
11101 Find its inherited mergeinfo. If it doesn't have any then simply
11102 set source_mergeinfo to an empty hash. */
11103 SVN_ERR(svn_client__get_repos_mergeinfo(
11104 &source_mergeinfo, source_ra_session,
11105 source_pathrev->url, source_pathrev->rev,
11106 svn_mergeinfo_inherited, FALSE /*squelch_incapable*/,
11107 iterpool));
11108 if (!source_mergeinfo)
11109 source_mergeinfo = apr_hash_make(iterpool);
11110 }
11111
11112 /* Use scratch_pool rather than iterpool because filtered_mergeinfo
11113 is going into new_catalog below and needs to last to the end of
11114 this function. */
11115 SVN_ERR(find_unmerged_mergeinfo_subroutine(
11116 &filtered_mergeinfo, target_history_as_mergeinfo,
11117 source_mergeinfo, source_pathrev,
11118 source_ra_session, ctx, scratch_pool, iterpool));
11119 svn_hash_sets(new_catalog, apr_pstrdup(scratch_pool, source_path),
11120 filtered_mergeinfo);
11121 }
11122
11123 /* Are there any subtrees with explicit mergeinfo still left in the merge
11124 source where there was no explicit mergeinfo for the corresponding path
11125 in the merge target? If so, add the intersection of those path's
11126 mergeinfo and the corresponding target path's mergeinfo to
11127 new_catalog. */
11128 for (hi = apr_hash_first(scratch_pool, source_catalog);
11129 hi;
11130 hi = apr_hash_next(hi))
11131 {
11132 const char *source_path = svn__apr_hash_index_key(hi);
11133 const char *path_rel_to_session =
11134 svn_relpath_skip_ancestor(source_repos_rel_path, source_path);
11135 const char *source_url;
11136 svn_mergeinfo_t source_mergeinfo = svn__apr_hash_index_val(hi);
11137 svn_mergeinfo_t filtered_mergeinfo;
11138 svn_client__pathrev_t *target_pathrev;
11139 svn_mergeinfo_t target_history_as_mergeinfo;
11140 svn_error_t *err;
11141
11142 svn_pool_clear(iterpool);
11143
11144 source_url = svn_path_url_add_component2(source_loc->url,
11145 path_rel_to_session, iterpool);
11146 target_pathrev = svn_client__pathrev_join_relpath(
11147 &target->loc, path_rel_to_session, iterpool);
11148 err = svn_client__get_history_as_mergeinfo(&target_history_as_mergeinfo,
11149 NULL /* has_rev_zero_history */,
11150 target_pathrev,
11151 target->loc.rev,
11152 SVN_INVALID_REVNUM,
11153 target_ra_session,
11154 ctx, iterpool);
11155 if (err)
11156 {
11157 if (err->apr_err == SVN_ERR_FS_NOT_FOUND
11158 || err->apr_err == SVN_ERR_RA_DAV_REQUEST_FAILED)
11159 {
11160 /* This path with explicit mergeinfo in the source doesn't
11161 exist on the target. */
11162 svn_error_clear(err);
11163 err = NULL;
11164 }
11165 else
11166 {
11167 return svn_error_trace(err);
11168 }
11169 }
11170 else
11171 {
11172 svn_client__pathrev_t *pathrev;
11173
11174 SVN_ERR(find_youngest_merged_rev(youngest_merged_rev,
11175 target_history_as_mergeinfo,
11176 source_mergeinfo,
11177 iterpool));
11178
11179 /* Use scratch_pool rather than iterpool because filtered_mergeinfo
11180 is going into new_catalog below and needs to last to the end of
11181 this function. */
11182 /* ### Why looking at SOURCE_url at TARGET_rev? */
11183 SVN_ERR(svn_client__pathrev_create_with_session(
11184 &pathrev, source_ra_session, target->loc.rev, source_url,
11185 iterpool));
11186 SVN_ERR(find_unmerged_mergeinfo_subroutine(
11187 &filtered_mergeinfo, target_history_as_mergeinfo,
11188 source_mergeinfo, pathrev,
11189 source_ra_session, ctx, scratch_pool, iterpool));
11190 if (apr_hash_count(filtered_mergeinfo))
11191 svn_hash_sets(new_catalog,
11192 apr_pstrdup(scratch_pool, source_path),
11193 filtered_mergeinfo);
11194 }
11195 }
11196
11197 /* Limit new_catalog to the youngest revisions previously merged from
11198 the target to the source. */
11199 if (SVN_IS_VALID_REVNUM(*youngest_merged_rev))
11200 SVN_ERR(svn_mergeinfo__filter_catalog_by_ranges(&new_catalog,
11201 new_catalog,
11202 *youngest_merged_rev,
11203 0, /* No oldest bound. */
11204 TRUE,
11205 scratch_pool,
11206 scratch_pool));
11207
11208 /* Make a shiny new copy before blowing away all the temporary pools. */
11209 *unmerged_to_source_catalog = svn_mergeinfo_catalog_dup(new_catalog,
11210 result_pool);
11211 svn_pool_destroy(iterpool);
11212 return SVN_NO_ERROR;
11213 }
11214
11215 /* Helper for svn_client_merge_reintegrate() which calculates the
11216 'left hand side' of the underlying two-URL merge that a --reintegrate
11217 merge actually performs. If no merge should be performed, set
11218 *LEFT_P to NULL.
11219
11220 TARGET->abspath is the absolute working copy path of the reintegrate
11221 merge.
11222
11223 SOURCE_LOC is the reintegrate source.
11224
11225 SUBTREES_WITH_MERGEINFO is a hash of (const char *) absolute paths mapped
11226 to (svn_mergeinfo_t *) mergeinfo values for each working copy path with
11227 explicit mergeinfo in TARGET->abspath. Actually we only need to know the
11228 paths, not the mergeinfo.
11229
11230 TARGET->loc.rev is the working revision the entire WC tree rooted at
11231 TARGET is at.
11232
11233 Populate *UNMERGED_TO_SOURCE_CATALOG with the mergeinfo describing what
11234 parts of TARGET->loc have not been merged to SOURCE_LOC, up to the
11235 youngest revision ever merged from the TARGET->abspath to the source if
11236 such exists, see doc string for find_unmerged_mergeinfo().
11237
11238 SOURCE_RA_SESSION is a session opened to the SOURCE_LOC
11239 and TARGET_RA_SESSION is open to TARGET->loc.url.
11240
11241 *LEFT_P, *MERGED_TO_SOURCE_CATALOG , and *UNMERGED_TO_SOURCE_CATALOG are
11242 allocated in RESULT_POOL. SCRATCH_POOL is used for all temporary
11243 allocations. */
11244 static svn_error_t *
calculate_left_hand_side(svn_client__pathrev_t ** left_p,svn_mergeinfo_catalog_t * merged_to_source_catalog,svn_mergeinfo_catalog_t * unmerged_to_source_catalog,const merge_target_t * target,apr_hash_t * subtrees_with_mergeinfo,const svn_client__pathrev_t * source_loc,svn_ra_session_t * source_ra_session,svn_ra_session_t * target_ra_session,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)11245 calculate_left_hand_side(svn_client__pathrev_t **left_p,
11246 svn_mergeinfo_catalog_t *merged_to_source_catalog,
11247 svn_mergeinfo_catalog_t *unmerged_to_source_catalog,
11248 const merge_target_t *target,
11249 apr_hash_t *subtrees_with_mergeinfo,
11250 const svn_client__pathrev_t *source_loc,
11251 svn_ra_session_t *source_ra_session,
11252 svn_ra_session_t *target_ra_session,
11253 svn_client_ctx_t *ctx,
11254 apr_pool_t *result_pool,
11255 apr_pool_t *scratch_pool)
11256 {
11257 svn_mergeinfo_catalog_t mergeinfo_catalog, unmerged_catalog;
11258 apr_pool_t *iterpool = svn_pool_create(scratch_pool);
11259 apr_hash_index_t *hi;
11260 /* hash of paths mapped to arrays of svn_mergeinfo_t. */
11261 apr_hash_t *target_history_hash = apr_hash_make(scratch_pool);
11262 svn_revnum_t youngest_merged_rev;
11263 svn_client__pathrev_t *yc_ancestor;
11264
11265 assert(session_url_is(source_ra_session, source_loc->url, scratch_pool));
11266 assert(session_url_is(target_ra_session, target->loc.url, scratch_pool));
11267
11268 /* Initialize our return variables. */
11269 *left_p = NULL;
11270
11271 /* TARGET->abspath may not have explicit mergeinfo and thus may not be
11272 contained within SUBTREES_WITH_MERGEINFO. If this is the case then
11273 add a dummy item for TARGET->abspath so we get its history (i.e. implicit
11274 mergeinfo) below. */
11275 if (!svn_hash_gets(subtrees_with_mergeinfo, target->abspath))
11276 svn_hash_sets(subtrees_with_mergeinfo, target->abspath,
11277 apr_hash_make(result_pool));
11278
11279 /* Get the history segments (as mergeinfo) for TARGET->abspath and any of
11280 its subtrees with explicit mergeinfo. */
11281 for (hi = apr_hash_first(scratch_pool, subtrees_with_mergeinfo);
11282 hi;
11283 hi = apr_hash_next(hi))
11284 {
11285 const char *local_abspath = svn__apr_hash_index_key(hi);
11286 svn_client__pathrev_t *target_child;
11287 const char *repos_relpath;
11288 svn_mergeinfo_t target_history_as_mergeinfo;
11289
11290 svn_pool_clear(iterpool);
11291
11292 /* Convert the absolute path with mergeinfo on it to a path relative
11293 to the session root. */
11294 SVN_ERR(svn_wc__node_get_repos_info(NULL, &repos_relpath, NULL, NULL,
11295 ctx->wc_ctx, local_abspath,
11296 scratch_pool, iterpool));
11297 target_child = svn_client__pathrev_create_with_relpath(
11298 target->loc.repos_root_url, target->loc.repos_uuid,
11299 target->loc.rev, repos_relpath, iterpool);
11300 SVN_ERR(svn_client__get_history_as_mergeinfo(&target_history_as_mergeinfo,
11301 NULL /* has_rev_zero_hist */,
11302 target_child,
11303 target->loc.rev,
11304 SVN_INVALID_REVNUM,
11305 target_ra_session,
11306 ctx, scratch_pool));
11307
11308 svn_hash_sets(target_history_hash, repos_relpath,
11309 target_history_as_mergeinfo);
11310 }
11311
11312 /* Check that SOURCE_LOC and TARGET->loc are
11313 actually related, we can't reintegrate if they are not. Also
11314 get an initial value for the YCA revision number. */
11315 SVN_ERR(svn_client__get_youngest_common_ancestor(
11316 &yc_ancestor, source_loc, &target->loc, target_ra_session, ctx,
11317 iterpool, iterpool));
11318 if (! yc_ancestor)
11319 return svn_error_createf(SVN_ERR_CLIENT_NOT_READY_TO_MERGE, NULL,
11320 _("'%s@%ld' must be ancestrally related to "
11321 "'%s@%ld'"), source_loc->url, source_loc->rev,
11322 target->loc.url, target->loc.rev);
11323
11324 /* If the source revision is the same as the youngest common
11325 revision, then there can't possibly be any unmerged revisions
11326 that we need to apply to target. */
11327 if (source_loc->rev == yc_ancestor->rev)
11328 {
11329 svn_pool_destroy(iterpool);
11330 return SVN_NO_ERROR;
11331 }
11332
11333 /* Get the mergeinfo from the source, including its descendants
11334 with differing explicit mergeinfo. */
11335 SVN_ERR(svn_client__get_repos_mergeinfo_catalog(
11336 &mergeinfo_catalog, source_ra_session,
11337 source_loc->url, source_loc->rev,
11338 svn_mergeinfo_inherited, FALSE /* squelch_incapable */,
11339 TRUE /* include_descendants */, iterpool, iterpool));
11340
11341 if (!mergeinfo_catalog)
11342 mergeinfo_catalog = apr_hash_make(iterpool);
11343
11344 *merged_to_source_catalog = svn_mergeinfo_catalog_dup(mergeinfo_catalog,
11345 result_pool);
11346
11347 /* Filter the source's mergeinfo catalog so that we are left with
11348 mergeinfo that describes what has *not* previously been merged from
11349 TARGET->loc to SOURCE_LOC. */
11350 SVN_ERR(find_unmerged_mergeinfo(&unmerged_catalog,
11351 &youngest_merged_rev,
11352 yc_ancestor->rev,
11353 mergeinfo_catalog,
11354 target_history_hash,
11355 source_loc,
11356 target,
11357 source_ra_session,
11358 target_ra_session,
11359 ctx,
11360 iterpool, iterpool));
11361
11362 /* Simplify unmerged_catalog through elision then make a copy in POOL. */
11363 SVN_ERR(svn_client__elide_mergeinfo_catalog(unmerged_catalog,
11364 iterpool));
11365 *unmerged_to_source_catalog = svn_mergeinfo_catalog_dup(unmerged_catalog,
11366 result_pool);
11367
11368 if (youngest_merged_rev == SVN_INVALID_REVNUM)
11369 {
11370 /* We never merged to the source. Just return the branch point. */
11371 *left_p = svn_client__pathrev_dup(yc_ancestor, result_pool);
11372 }
11373 else
11374 {
11375 /* We've previously merged some or all of the target, up to
11376 youngest_merged_rev, to the source. Set
11377 *LEFT_P to cover the youngest part of this range. */
11378 SVN_ERR(svn_client__repos_location(left_p, target_ra_session,
11379 &target->loc, youngest_merged_rev,
11380 ctx, result_pool, iterpool));
11381 }
11382
11383 svn_pool_destroy(iterpool);
11384 return SVN_NO_ERROR;
11385 }
11386
11387 /* Determine the URLs and revisions needed to perform a reintegrate merge
11388 * from SOURCE_LOC into the working copy at TARGET.
11389 *
11390 * SOURCE_RA_SESSION and TARGET_RA_SESSION are RA sessions opened to the
11391 * URLs of SOURCE_LOC and TARGET->loc respectively.
11392 *
11393 * Set *SOURCE_P to
11394 * the source-left and source-right locations of the required merge. Set
11395 * *YC_ANCESTOR_P to the location of the youngest ancestor.
11396 * Any of these output pointers may be NULL if not wanted.
11397 *
11398 * See svn_client_find_reintegrate_merge() for other details.
11399 */
11400 static svn_error_t *
find_reintegrate_merge(merge_source_t ** source_p,svn_client__pathrev_t ** yc_ancestor_p,svn_ra_session_t * source_ra_session,const svn_client__pathrev_t * source_loc,svn_ra_session_t * target_ra_session,const merge_target_t * target,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)11401 find_reintegrate_merge(merge_source_t **source_p,
11402 svn_client__pathrev_t **yc_ancestor_p,
11403 svn_ra_session_t *source_ra_session,
11404 const svn_client__pathrev_t *source_loc,
11405 svn_ra_session_t *target_ra_session,
11406 const merge_target_t *target,
11407 svn_client_ctx_t *ctx,
11408 apr_pool_t *result_pool,
11409 apr_pool_t *scratch_pool)
11410 {
11411 svn_client__pathrev_t *yc_ancestor;
11412 svn_client__pathrev_t *loc1;
11413 merge_source_t source;
11414 svn_mergeinfo_catalog_t unmerged_to_source_mergeinfo_catalog;
11415 svn_mergeinfo_catalog_t merged_to_source_mergeinfo_catalog;
11416 svn_error_t *err;
11417 apr_hash_t *subtrees_with_mergeinfo;
11418
11419 assert(session_url_is(source_ra_session, source_loc->url, scratch_pool));
11420 assert(session_url_is(target_ra_session, target->loc.url, scratch_pool));
11421
11422 /* As the WC tree is "pure", use its last-updated-to revision as
11423 the default revision for the left side of our merge, since that's
11424 what the repository sub-tree is required to be up to date with
11425 (with regard to the WC). */
11426 /* ### Bogus/obsolete comment? */
11427
11428 /* Can't reintegrate to or from the root of the repository. */
11429 if (strcmp(source_loc->url, source_loc->repos_root_url) == 0
11430 || strcmp(target->loc.url, target->loc.repos_root_url) == 0)
11431 return svn_error_createf(SVN_ERR_CLIENT_NOT_READY_TO_MERGE, NULL,
11432 _("Neither the reintegrate source nor target "
11433 "can be the root of the repository"));
11434
11435 /* Find all the subtrees in TARGET_WCPATH that have explicit mergeinfo. */
11436 err = get_wc_explicit_mergeinfo_catalog(&subtrees_with_mergeinfo,
11437 target->abspath, svn_depth_infinity,
11438 ctx, scratch_pool, scratch_pool);
11439 /* Issue #3896: If invalid mergeinfo in the reintegrate target
11440 prevents us from proceeding, then raise the best error possible. */
11441 if (err && err->apr_err == SVN_ERR_CLIENT_INVALID_MERGEINFO_NO_MERGETRACKING)
11442 err = svn_error_quick_wrap(err, _("Reintegrate merge not possible"));
11443 SVN_ERR(err);
11444
11445 SVN_ERR(calculate_left_hand_side(&loc1,
11446 &merged_to_source_mergeinfo_catalog,
11447 &unmerged_to_source_mergeinfo_catalog,
11448 target,
11449 subtrees_with_mergeinfo,
11450 source_loc,
11451 source_ra_session,
11452 target_ra_session,
11453 ctx,
11454 scratch_pool, scratch_pool));
11455
11456 /* Did calculate_left_hand_side() decide that there was no merge to
11457 be performed here? */
11458 if (! loc1)
11459 {
11460 if (source_p)
11461 *source_p = NULL;
11462 if (yc_ancestor_p)
11463 *yc_ancestor_p = NULL;
11464 return SVN_NO_ERROR;
11465 }
11466
11467 source.loc1 = loc1;
11468 source.loc2 = source_loc;
11469
11470 /* If the target was moved after the source was branched from it,
11471 it is possible that the left URL differs from the target's current
11472 URL. If so, then adjust TARGET_RA_SESSION to point to the old URL. */
11473 if (strcmp(source.loc1->url, target->loc.url))
11474 SVN_ERR(svn_ra_reparent(target_ra_session, source.loc1->url, scratch_pool));
11475
11476 SVN_ERR(svn_client__get_youngest_common_ancestor(
11477 &yc_ancestor, source.loc2, source.loc1, target_ra_session,
11478 ctx, scratch_pool, scratch_pool));
11479
11480 if (! yc_ancestor)
11481 return svn_error_createf(SVN_ERR_CLIENT_NOT_READY_TO_MERGE, NULL,
11482 _("'%s@%ld' must be ancestrally related to "
11483 "'%s@%ld'"),
11484 source.loc1->url, source.loc1->rev,
11485 source.loc2->url, source.loc2->rev);
11486
11487 /* The source side of a reintegrate merge is not 'ancestral', except in
11488 * the degenerate case where source == YCA. */
11489 source.ancestral = (loc1->rev == yc_ancestor->rev);
11490
11491 if (source.loc1->rev > yc_ancestor->rev)
11492 {
11493 /* Have we actually merged anything to the source from the
11494 target? If so, make sure we've merged a contiguous
11495 prefix. */
11496 svn_mergeinfo_catalog_t final_unmerged_catalog = apr_hash_make(scratch_pool);
11497
11498 SVN_ERR(find_unsynced_ranges(source_loc, &target->loc,
11499 unmerged_to_source_mergeinfo_catalog,
11500 merged_to_source_mergeinfo_catalog,
11501 final_unmerged_catalog,
11502 target_ra_session, scratch_pool,
11503 scratch_pool));
11504
11505 if (apr_hash_count(final_unmerged_catalog))
11506 {
11507 svn_string_t *source_mergeinfo_cat_string;
11508
11509 SVN_ERR(svn_mergeinfo__catalog_to_formatted_string(
11510 &source_mergeinfo_cat_string,
11511 final_unmerged_catalog,
11512 " ", " Missing ranges: ", scratch_pool));
11513 return svn_error_createf(SVN_ERR_CLIENT_NOT_READY_TO_MERGE,
11514 NULL,
11515 _("Reintegrate can only be used if "
11516 "revisions %ld through %ld were "
11517 "previously merged from %s to the "
11518 "reintegrate source, but this is "
11519 "not the case:\n%s"),
11520 yc_ancestor->rev + 1, source.loc2->rev,
11521 target->loc.url,
11522 source_mergeinfo_cat_string->data);
11523 }
11524 }
11525
11526 /* Left side: trunk@youngest-trunk-rev-merged-to-branch-at-specified-peg-rev
11527 * Right side: branch@specified-peg-revision */
11528 if (source_p)
11529 *source_p = merge_source_dup(&source, result_pool);
11530
11531 if (yc_ancestor_p)
11532 *yc_ancestor_p = svn_client__pathrev_dup(yc_ancestor, result_pool);
11533 return SVN_NO_ERROR;
11534 }
11535
11536 /* Resolve the source and target locations and open RA sessions to them, and
11537 * perform some checks appropriate for a reintegrate merge.
11538 *
11539 * Set *SOURCE_RA_SESSION_P and *SOURCE_LOC_P to a new session and the
11540 * repository location of SOURCE_PATH_OR_URL at SOURCE_PEG_REVISION. Set
11541 * *TARGET_RA_SESSION_P and *TARGET_P to a new session and the repository
11542 * location of the WC at TARGET_ABSPATH.
11543 *
11544 * Throw a SVN_ERR_CLIENT_UNRELATED_RESOURCES error if the target WC node is
11545 * a locally added node or if the source and target are not in the same
11546 * repository. Throw a SVN_ERR_CLIENT_NOT_READY_TO_MERGE error if the
11547 * target WC is not at a single revision without switched subtrees and
11548 * without local mods.
11549 *
11550 * Allocate all the outputs in RESULT_POOL.
11551 */
11552 static svn_error_t *
open_reintegrate_source_and_target(svn_ra_session_t ** source_ra_session_p,svn_client__pathrev_t ** source_loc_p,svn_ra_session_t ** target_ra_session_p,merge_target_t ** target_p,const char * source_path_or_url,const svn_opt_revision_t * source_peg_revision,const char * target_abspath,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)11553 open_reintegrate_source_and_target(svn_ra_session_t **source_ra_session_p,
11554 svn_client__pathrev_t **source_loc_p,
11555 svn_ra_session_t **target_ra_session_p,
11556 merge_target_t **target_p,
11557 const char *source_path_or_url,
11558 const svn_opt_revision_t *source_peg_revision,
11559 const char *target_abspath,
11560 svn_client_ctx_t *ctx,
11561 apr_pool_t *result_pool,
11562 apr_pool_t *scratch_pool)
11563 {
11564 svn_client__pathrev_t *source_loc;
11565 merge_target_t *target;
11566
11567 /* Open the target WC. A reintegrate merge requires the merge target to
11568 * reflect a subtree of the repository as found at a single revision. */
11569 SVN_ERR(open_target_wc(&target, target_abspath,
11570 FALSE, FALSE, FALSE,
11571 ctx, scratch_pool, scratch_pool));
11572 SVN_ERR(svn_client_open_ra_session2(target_ra_session_p,
11573 target->loc.url, target->abspath,
11574 ctx, result_pool, scratch_pool));
11575 if (! target->loc.url)
11576 return svn_error_createf(SVN_ERR_CLIENT_UNRELATED_RESOURCES, NULL,
11577 _("Can't reintegrate into '%s' because it is "
11578 "locally added and therefore not related to "
11579 "the merge source"),
11580 svn_dirent_local_style(target->abspath,
11581 scratch_pool));
11582
11583 SVN_ERR(svn_client__ra_session_from_path2(
11584 source_ra_session_p, &source_loc,
11585 source_path_or_url, NULL, source_peg_revision, source_peg_revision,
11586 ctx, result_pool));
11587
11588 /* source_loc and target->loc are required to be in the same repository,
11589 as mergeinfo doesn't come into play for cross-repository merging. */
11590 SVN_ERR(check_same_repos(source_loc,
11591 svn_dirent_local_style(source_path_or_url,
11592 scratch_pool),
11593 &target->loc,
11594 svn_dirent_local_style(target->abspath,
11595 scratch_pool),
11596 TRUE /* strict_urls */, scratch_pool));
11597
11598 *source_loc_p = source_loc;
11599 *target_p = target;
11600 return SVN_NO_ERROR;
11601 }
11602
11603 /* The body of svn_client_merge_reintegrate(), which see for details. */
11604 static svn_error_t *
merge_reintegrate_locked(conflict_report_t ** conflict_report,const char * source_path_or_url,const svn_opt_revision_t * source_peg_revision,const char * target_abspath,svn_boolean_t diff_ignore_ancestry,svn_boolean_t dry_run,const apr_array_header_t * merge_options,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)11605 merge_reintegrate_locked(conflict_report_t **conflict_report,
11606 const char *source_path_or_url,
11607 const svn_opt_revision_t *source_peg_revision,
11608 const char *target_abspath,
11609 svn_boolean_t diff_ignore_ancestry,
11610 svn_boolean_t dry_run,
11611 const apr_array_header_t *merge_options,
11612 svn_client_ctx_t *ctx,
11613 apr_pool_t *result_pool,
11614 apr_pool_t *scratch_pool)
11615 {
11616 svn_ra_session_t *target_ra_session, *source_ra_session;
11617 merge_target_t *target;
11618 svn_client__pathrev_t *source_loc;
11619 merge_source_t *source;
11620 svn_client__pathrev_t *yc_ancestor;
11621 svn_boolean_t use_sleep = FALSE;
11622 svn_error_t *err;
11623
11624 SVN_ERR(open_reintegrate_source_and_target(
11625 &source_ra_session, &source_loc, &target_ra_session, &target,
11626 source_path_or_url, source_peg_revision, target_abspath,
11627 ctx, scratch_pool, scratch_pool));
11628
11629 SVN_ERR(find_reintegrate_merge(&source, &yc_ancestor,
11630 source_ra_session, source_loc,
11631 target_ra_session, target,
11632 ctx, scratch_pool, scratch_pool));
11633
11634 if (! source)
11635 {
11636 return SVN_NO_ERROR;
11637 }
11638
11639 /* Do the real merge! */
11640 /* ### TODO(reint): Make sure that one isn't the same line ancestor
11641 ### of the other (what's erroneously referred to as "ancestrally
11642 ### related" in this source file). For now, we just say the source
11643 ### isn't "ancestral" even if it is (in the degenerate case where
11644 ### source-left equals YCA). */
11645 source->ancestral = FALSE;
11646 err = merge_cousins_and_supplement_mergeinfo(conflict_report,
11647 &use_sleep,
11648 target,
11649 target_ra_session,
11650 source_ra_session,
11651 source, yc_ancestor,
11652 TRUE /* same_repos */,
11653 svn_depth_infinity,
11654 diff_ignore_ancestry,
11655 FALSE /* force_delete */,
11656 FALSE /* record_only */,
11657 dry_run,
11658 merge_options,
11659 ctx,
11660 result_pool, scratch_pool);
11661
11662 if (use_sleep)
11663 svn_io_sleep_for_timestamps(target_abspath, scratch_pool);
11664
11665 SVN_ERR(err);
11666 return SVN_NO_ERROR;
11667 }
11668
11669 svn_error_t *
svn_client_merge_reintegrate(const char * source_path_or_url,const svn_opt_revision_t * source_peg_revision,const char * target_wcpath,svn_boolean_t dry_run,const apr_array_header_t * merge_options,svn_client_ctx_t * ctx,apr_pool_t * pool)11670 svn_client_merge_reintegrate(const char *source_path_or_url,
11671 const svn_opt_revision_t *source_peg_revision,
11672 const char *target_wcpath,
11673 svn_boolean_t dry_run,
11674 const apr_array_header_t *merge_options,
11675 svn_client_ctx_t *ctx,
11676 apr_pool_t *pool)
11677 {
11678 const char *target_abspath, *lock_abspath;
11679 conflict_report_t *conflict_report;
11680
11681 SVN_ERR(get_target_and_lock_abspath(&target_abspath, &lock_abspath,
11682 target_wcpath, ctx, pool));
11683
11684 if (!dry_run)
11685 SVN_WC__CALL_WITH_WRITE_LOCK(
11686 merge_reintegrate_locked(&conflict_report,
11687 source_path_or_url, source_peg_revision,
11688 target_abspath,
11689 FALSE /*diff_ignore_ancestry*/,
11690 dry_run, merge_options, ctx, pool, pool),
11691 ctx->wc_ctx, lock_abspath, FALSE /* lock_anchor */, pool);
11692 else
11693 SVN_ERR(merge_reintegrate_locked(&conflict_report,
11694 source_path_or_url, source_peg_revision,
11695 target_abspath,
11696 FALSE /*diff_ignore_ancestry*/,
11697 dry_run, merge_options, ctx, pool, pool));
11698
11699 SVN_ERR(make_merge_conflict_error(conflict_report, pool));
11700 return SVN_NO_ERROR;
11701 }
11702
11703
11704 /* The body of svn_client_merge_peg5(), which see for details.
11705 *
11706 * IGNORE_MERGEINFO and DIFF_IGNORE_ANCESTRY are as in do_merge().
11707 */
11708 static svn_error_t *
merge_peg_locked(conflict_report_t ** conflict_report,const char * source_path_or_url,const svn_opt_revision_t * source_peg_revision,const svn_rangelist_t * ranges_to_merge,const char * target_abspath,svn_depth_t depth,svn_boolean_t ignore_mergeinfo,svn_boolean_t diff_ignore_ancestry,svn_boolean_t force_delete,svn_boolean_t record_only,svn_boolean_t dry_run,svn_boolean_t allow_mixed_rev,const apr_array_header_t * merge_options,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)11709 merge_peg_locked(conflict_report_t **conflict_report,
11710 const char *source_path_or_url,
11711 const svn_opt_revision_t *source_peg_revision,
11712 const svn_rangelist_t *ranges_to_merge,
11713 const char *target_abspath,
11714 svn_depth_t depth,
11715 svn_boolean_t ignore_mergeinfo,
11716 svn_boolean_t diff_ignore_ancestry,
11717 svn_boolean_t force_delete,
11718 svn_boolean_t record_only,
11719 svn_boolean_t dry_run,
11720 svn_boolean_t allow_mixed_rev,
11721 const apr_array_header_t *merge_options,
11722 svn_client_ctx_t *ctx,
11723 apr_pool_t *result_pool,
11724 apr_pool_t *scratch_pool)
11725 {
11726 merge_target_t *target;
11727 svn_client__pathrev_t *source_loc;
11728 apr_array_header_t *merge_sources;
11729 svn_ra_session_t *ra_session;
11730 apr_pool_t *sesspool;
11731 svn_boolean_t use_sleep = FALSE;
11732 svn_error_t *err;
11733 svn_boolean_t same_repos;
11734
11735 SVN_ERR_ASSERT(svn_dirent_is_absolute(target_abspath));
11736
11737 SVN_ERR(open_target_wc(&target, target_abspath,
11738 allow_mixed_rev, TRUE, TRUE,
11739 ctx, scratch_pool, scratch_pool));
11740
11741 /* Create a short lived session pool */
11742 sesspool = svn_pool_create(scratch_pool);
11743
11744 /* Open an RA session to our source URL, and determine its root URL. */
11745 SVN_ERR(svn_client__ra_session_from_path2(
11746 &ra_session, &source_loc,
11747 source_path_or_url, NULL, source_peg_revision, source_peg_revision,
11748 ctx, sesspool));
11749
11750 /* Normalize our merge sources. */
11751 SVN_ERR(normalize_merge_sources(&merge_sources, source_path_or_url,
11752 source_loc,
11753 ranges_to_merge, ra_session, ctx,
11754 scratch_pool, scratch_pool));
11755
11756 /* Check for same_repos. */
11757 same_repos = is_same_repos(&target->loc, source_loc, TRUE /* strict_urls */);
11758
11759 /* Do the real merge! (We say with confidence that our merge
11760 sources are both ancestral and related.) */
11761 err = do_merge(NULL, NULL, conflict_report, &use_sleep,
11762 merge_sources, target, ra_session,
11763 TRUE /*sources_related*/, same_repos, ignore_mergeinfo,
11764 diff_ignore_ancestry, force_delete, dry_run,
11765 record_only, NULL, FALSE, FALSE, depth, merge_options,
11766 ctx, result_pool, scratch_pool);
11767
11768 /* We're done with our RA session. */
11769 svn_pool_destroy(sesspool);
11770
11771 if (use_sleep)
11772 svn_io_sleep_for_timestamps(target_abspath, scratch_pool);
11773
11774 SVN_ERR(err);
11775 return SVN_NO_ERROR;
11776 }
11777
11778 /* Details of an automatic merge. */
11779 typedef struct automatic_merge_t
11780 {
11781 svn_client__pathrev_t *yca, *base, *right, *target;
11782 svn_boolean_t is_reintegrate_like;
11783 svn_boolean_t allow_mixed_rev, allow_local_mods, allow_switched_subtrees;
11784 } automatic_merge_t;
11785
11786 static svn_error_t *
11787 client_find_automatic_merge(automatic_merge_t **merge_p,
11788 const char *source_path_or_url,
11789 const svn_opt_revision_t *source_revision,
11790 const char *target_abspath,
11791 svn_boolean_t allow_mixed_rev,
11792 svn_boolean_t allow_local_mods,
11793 svn_boolean_t allow_switched_subtrees,
11794 svn_client_ctx_t *ctx,
11795 apr_pool_t *result_pool,
11796 apr_pool_t *scratch_pool);
11797
11798 static svn_error_t *
11799 do_automatic_merge_locked(conflict_report_t **conflict_report,
11800 const automatic_merge_t *merge,
11801 const char *target_abspath,
11802 svn_depth_t depth,
11803 svn_boolean_t diff_ignore_ancestry,
11804 svn_boolean_t force_delete,
11805 svn_boolean_t record_only,
11806 svn_boolean_t dry_run,
11807 const apr_array_header_t *merge_options,
11808 svn_client_ctx_t *ctx,
11809 apr_pool_t *result_pool,
11810 apr_pool_t *scratch_pool);
11811
11812 svn_error_t *
svn_client_merge_peg5(const char * source_path_or_url,const apr_array_header_t * ranges_to_merge,const svn_opt_revision_t * source_peg_revision,const char * target_wcpath,svn_depth_t depth,svn_boolean_t ignore_mergeinfo,svn_boolean_t diff_ignore_ancestry,svn_boolean_t force_delete,svn_boolean_t record_only,svn_boolean_t dry_run,svn_boolean_t allow_mixed_rev,const apr_array_header_t * merge_options,svn_client_ctx_t * ctx,apr_pool_t * pool)11813 svn_client_merge_peg5(const char *source_path_or_url,
11814 const apr_array_header_t *ranges_to_merge,
11815 const svn_opt_revision_t *source_peg_revision,
11816 const char *target_wcpath,
11817 svn_depth_t depth,
11818 svn_boolean_t ignore_mergeinfo,
11819 svn_boolean_t diff_ignore_ancestry,
11820 svn_boolean_t force_delete,
11821 svn_boolean_t record_only,
11822 svn_boolean_t dry_run,
11823 svn_boolean_t allow_mixed_rev,
11824 const apr_array_header_t *merge_options,
11825 svn_client_ctx_t *ctx,
11826 apr_pool_t *pool)
11827 {
11828 const char *target_abspath, *lock_abspath;
11829 conflict_report_t *conflict_report;
11830
11831 /* No ranges to merge? No problem. */
11832 if (ranges_to_merge != NULL && ranges_to_merge->nelts == 0)
11833 return SVN_NO_ERROR;
11834
11835 SVN_ERR(get_target_and_lock_abspath(&target_abspath, &lock_abspath,
11836 target_wcpath, ctx, pool));
11837
11838 /* Do an automatic merge if no revision ranges are specified. */
11839 if (ranges_to_merge == NULL)
11840 {
11841 automatic_merge_t *merge;
11842
11843 if (ignore_mergeinfo)
11844 return svn_error_create(SVN_ERR_INCORRECT_PARAMS, NULL,
11845 _("Cannot merge automatically while "
11846 "ignoring mergeinfo"));
11847
11848 /* Find the details of the merge needed. */
11849 SVN_ERR(client_find_automatic_merge(
11850 &merge,
11851 source_path_or_url, source_peg_revision,
11852 target_abspath,
11853 allow_mixed_rev,
11854 TRUE /*allow_local_mods*/,
11855 TRUE /*allow_switched_subtrees*/,
11856 ctx, pool, pool));
11857
11858 if (!dry_run)
11859 SVN_WC__CALL_WITH_WRITE_LOCK(
11860 do_automatic_merge_locked(&conflict_report,
11861 merge,
11862 target_abspath, depth,
11863 diff_ignore_ancestry,
11864 force_delete, record_only, dry_run,
11865 merge_options, ctx, pool, pool),
11866 ctx->wc_ctx, lock_abspath, FALSE /* lock_anchor */, pool);
11867 else
11868 SVN_ERR(do_automatic_merge_locked(&conflict_report,
11869 merge,
11870 target_abspath, depth,
11871 diff_ignore_ancestry,
11872 force_delete, record_only, dry_run,
11873 merge_options, ctx, pool, pool));
11874 }
11875 else if (!dry_run)
11876 SVN_WC__CALL_WITH_WRITE_LOCK(
11877 merge_peg_locked(&conflict_report,
11878 source_path_or_url, source_peg_revision,
11879 ranges_to_merge,
11880 target_abspath, depth, ignore_mergeinfo,
11881 diff_ignore_ancestry,
11882 force_delete, record_only, dry_run,
11883 allow_mixed_rev, merge_options, ctx, pool, pool),
11884 ctx->wc_ctx, lock_abspath, FALSE /* lock_anchor */, pool);
11885 else
11886 SVN_ERR(merge_peg_locked(&conflict_report,
11887 source_path_or_url, source_peg_revision,
11888 ranges_to_merge,
11889 target_abspath, depth, ignore_mergeinfo,
11890 diff_ignore_ancestry,
11891 force_delete, record_only, dry_run,
11892 allow_mixed_rev, merge_options, ctx, pool, pool));
11893
11894 SVN_ERR(make_merge_conflict_error(conflict_report, pool));
11895 return SVN_NO_ERROR;
11896 }
11897
11898
11899 /* The location-history of a branch.
11900 *
11901 * This structure holds the set of path-revisions occupied by a branch,
11902 * from an externally chosen 'tip' location back to its origin. The
11903 * 'tip' location is the youngest location that we are considering on
11904 * the branch. */
11905 typedef struct branch_history_t
11906 {
11907 /* The tip location of the branch. That is, the youngest location that's
11908 * in the repository and that we're considering. If we're considering a
11909 * target branch right up to an uncommitted WC, then this is the WC base
11910 * (pristine) location. */
11911 svn_client__pathrev_t *tip;
11912 /* The location-segment history, as mergeinfo. */
11913 svn_mergeinfo_t history;
11914 /* Whether the location-segment history reached as far as (necessarily
11915 the root path in) revision 0 -- a fact that can't be represented as
11916 mergeinfo. */
11917 svn_boolean_t has_r0_history;
11918 } branch_history_t;
11919
11920 /* Return the location on BRANCH_HISTORY at revision REV, or NULL if none. */
11921 static svn_client__pathrev_t *
location_on_branch_at_rev(const branch_history_t * branch_history,svn_revnum_t rev,apr_pool_t * result_pool,apr_pool_t * scratch_pool)11922 location_on_branch_at_rev(const branch_history_t *branch_history,
11923 svn_revnum_t rev,
11924 apr_pool_t *result_pool,
11925 apr_pool_t *scratch_pool)
11926 {
11927 apr_hash_index_t *hi;
11928
11929 for (hi = apr_hash_first(scratch_pool, branch_history->history); hi;
11930 hi = apr_hash_next(hi))
11931 {
11932 const char *fspath = svn__apr_hash_index_key(hi);
11933 svn_rangelist_t *rangelist = svn__apr_hash_index_val(hi);
11934 int i;
11935
11936 for (i = 0; i < rangelist->nelts; i++)
11937 {
11938 svn_merge_range_t *r = APR_ARRAY_IDX(rangelist, i, svn_merge_range_t *);
11939 if (r->start < rev && rev <= r->end)
11940 {
11941 return svn_client__pathrev_create_with_relpath(
11942 branch_history->tip->repos_root_url,
11943 branch_history->tip->repos_uuid,
11944 rev, fspath + 1, result_pool);
11945 }
11946 }
11947 }
11948 return NULL;
11949 }
11950
11951 /* */
11952 typedef struct source_and_target_t
11953 {
11954 svn_client__pathrev_t *source;
11955 svn_ra_session_t *source_ra_session;
11956 branch_history_t source_branch;
11957
11958 merge_target_t *target;
11959 svn_ra_session_t *target_ra_session;
11960 branch_history_t target_branch;
11961
11962 /* Repos location of the youngest common ancestor of SOURCE and TARGET. */
11963 svn_client__pathrev_t *yca;
11964 } source_and_target_t;
11965
11966 /* Set *INTERSECTION_P to the intersection of BRANCH_HISTORY with the
11967 * revision range OLDEST_REV to YOUNGEST_REV (inclusive).
11968 *
11969 * If the intersection is empty, the result will be a branch history object
11970 * containing an empty (not null) history.
11971 *
11972 * ### The 'tip' of the result is currently unchanged.
11973 */
11974 static svn_error_t *
branch_history_intersect_range(branch_history_t ** intersection_p,const branch_history_t * branch_history,svn_revnum_t oldest_rev,svn_revnum_t youngest_rev,apr_pool_t * result_pool,apr_pool_t * scratch_pool)11975 branch_history_intersect_range(branch_history_t **intersection_p,
11976 const branch_history_t *branch_history,
11977 svn_revnum_t oldest_rev,
11978 svn_revnum_t youngest_rev,
11979 apr_pool_t *result_pool,
11980 apr_pool_t *scratch_pool)
11981 {
11982 branch_history_t *result = apr_palloc(result_pool, sizeof(*result));
11983
11984 SVN_ERR_ASSERT(SVN_IS_VALID_REVNUM(oldest_rev));
11985 SVN_ERR_ASSERT(SVN_IS_VALID_REVNUM(youngest_rev));
11986 SVN_ERR_ASSERT(oldest_rev >= 1);
11987 /* Allow a just-empty range (oldest = youngest + 1) but not an
11988 * arbitrary reverse range (such as oldest = youngest + 2). */
11989 SVN_ERR_ASSERT(oldest_rev <= youngest_rev + 1);
11990
11991 if (oldest_rev <= youngest_rev)
11992 {
11993 SVN_ERR(svn_mergeinfo__filter_mergeinfo_by_ranges(
11994 &result->history, branch_history->history,
11995 youngest_rev, oldest_rev - 1, TRUE /* include_range */,
11996 result_pool, scratch_pool));
11997 result->history = svn_mergeinfo_dup(result->history, result_pool);
11998 }
11999 else
12000 {
12001 result->history = apr_hash_make(result_pool);
12002 }
12003 result->has_r0_history = FALSE;
12004
12005 /* ### TODO: Set RESULT->tip to the tip of the intersection. */
12006 result->tip = svn_client__pathrev_dup(branch_history->tip, result_pool);
12007
12008 *intersection_p = result;
12009 return SVN_NO_ERROR;
12010 }
12011
12012 /* Set *OLDEST_P and *YOUNGEST_P to the oldest and youngest locations
12013 * (inclusive) along BRANCH. OLDEST_P and/or YOUNGEST_P may be NULL if not
12014 * wanted.
12015 */
12016 static svn_error_t *
branch_history_get_endpoints(svn_client__pathrev_t ** oldest_p,svn_client__pathrev_t ** youngest_p,const branch_history_t * branch,apr_pool_t * result_pool,apr_pool_t * scratch_pool)12017 branch_history_get_endpoints(svn_client__pathrev_t **oldest_p,
12018 svn_client__pathrev_t **youngest_p,
12019 const branch_history_t *branch,
12020 apr_pool_t *result_pool,
12021 apr_pool_t *scratch_pool)
12022 {
12023 svn_revnum_t youngest_rev, oldest_rev;
12024
12025 SVN_ERR(svn_mergeinfo__get_range_endpoints(
12026 &youngest_rev, &oldest_rev,
12027 branch->history, scratch_pool));
12028 if (oldest_p)
12029 *oldest_p = location_on_branch_at_rev(
12030 branch, oldest_rev + 1, result_pool, scratch_pool);
12031 if (youngest_p)
12032 *youngest_p = location_on_branch_at_rev(
12033 branch, youngest_rev, result_pool, scratch_pool);
12034 return SVN_NO_ERROR;
12035 }
12036
12037 /* Implements the svn_log_entry_receiver_t interface.
12038
12039 Set *BATON to LOG_ENTRY->revision and return SVN_ERR_CEASE_INVOCATION. */
12040 static svn_error_t *
operative_rev_receiver(void * baton,svn_log_entry_t * log_entry,apr_pool_t * pool)12041 operative_rev_receiver(void *baton,
12042 svn_log_entry_t *log_entry,
12043 apr_pool_t *pool)
12044 {
12045 svn_revnum_t *operative_rev = baton;
12046
12047 *operative_rev = log_entry->revision;
12048
12049 /* We've found the youngest merged or oldest eligible revision, so
12050 we're done...
12051
12052 ...but wait, shouldn't we care if LOG_ENTRY->NON_INHERITABLE is
12053 true? Because if it is, then LOG_ENTRY->REVISION is only
12054 partially merged/elgibile! And our only caller,
12055 find_last_merged_location (via short_circuit_mergeinfo_log) is
12056 interested in *fully* merged revisions. That's all true, but if
12057 find_last_merged_location() finds the youngest merged revision it
12058 will also check for the oldest eligible revision. So in the case
12059 the youngest merged rev is non-inheritable, the *same* non-inheritable
12060 rev will be found as the oldest eligible rev -- and
12061 find_last_merged_location() handles that situation. */
12062 return svn_error_create(SVN_ERR_CEASE_INVOCATION, NULL, NULL);
12063 }
12064
12065 /* Wrapper around svn_client__mergeinfo_log. All arguments are as per
12066 that private API. The discover_changed_paths, depth, and revprops args to
12067 svn_client__mergeinfo_log are always TRUE, svn_depth_infinity_t,
12068 and empty array respectively.
12069
12070 If RECEIVER raises a SVN_ERR_CEASE_INVOCATION error, but still sets
12071 *REVISION to a valid revnum, then clear the error. Otherwise return
12072 any error. */
12073 static svn_error_t*
short_circuit_mergeinfo_log(svn_mergeinfo_catalog_t * target_mergeinfo_cat,svn_boolean_t finding_merged,const char * target_path_or_url,const svn_opt_revision_t * target_peg_revision,const char * source_path_or_url,const svn_opt_revision_t * source_peg_revision,const svn_opt_revision_t * source_start_revision,const svn_opt_revision_t * source_end_revision,svn_log_entry_receiver_t receiver,svn_revnum_t * revision,svn_client_ctx_t * ctx,svn_ra_session_t * ra_session,apr_pool_t * result_pool,apr_pool_t * scratch_pool)12074 short_circuit_mergeinfo_log(svn_mergeinfo_catalog_t *target_mergeinfo_cat,
12075 svn_boolean_t finding_merged,
12076 const char *target_path_or_url,
12077 const svn_opt_revision_t *target_peg_revision,
12078 const char *source_path_or_url,
12079 const svn_opt_revision_t *source_peg_revision,
12080 const svn_opt_revision_t *source_start_revision,
12081 const svn_opt_revision_t *source_end_revision,
12082 svn_log_entry_receiver_t receiver,
12083 svn_revnum_t *revision,
12084 svn_client_ctx_t *ctx,
12085 svn_ra_session_t *ra_session,
12086 apr_pool_t *result_pool,
12087 apr_pool_t *scratch_pool)
12088 {
12089 apr_array_header_t *revprops;
12090 svn_error_t *err;
12091 const char *session_url;
12092
12093 SVN_ERR(svn_ra_get_session_url(ra_session, &session_url, scratch_pool));
12094
12095 revprops = apr_array_make(scratch_pool, 0, sizeof(const char *));
12096 err = svn_client__mergeinfo_log(finding_merged,
12097 target_path_or_url,
12098 target_peg_revision,
12099 target_mergeinfo_cat,
12100 source_path_or_url,
12101 source_peg_revision,
12102 source_start_revision,
12103 source_end_revision,
12104 receiver, revision,
12105 TRUE, svn_depth_infinity,
12106 revprops, ctx, ra_session,
12107 result_pool, scratch_pool);
12108
12109 err = svn_error_compose_create(
12110 err,
12111 svn_ra_reparent(ra_session, session_url, scratch_pool));
12112
12113 if (err)
12114 {
12115 /* We expect RECEIVER to short-circuit the (potentially expensive) log
12116 by raising an SVN_ERR_CEASE_INVOCATION -- see operative_rev_receiver.
12117 So we can ignore that error, but only as long as we actually found a
12118 valid revision. */
12119 if (SVN_IS_VALID_REVNUM(*revision)
12120 && err->apr_err == SVN_ERR_CEASE_INVOCATION)
12121 {
12122 svn_error_clear(err);
12123 err = NULL;
12124 }
12125 else
12126 {
12127 return svn_error_trace(err);
12128 }
12129 }
12130 return SVN_NO_ERROR;
12131 }
12132
12133 /* Set *BASE_P to the last location on SOURCE_BRANCH such that all changes
12134 * on SOURCE_BRANCH after YCA up to and including *BASE_P have already
12135 * been fully merged into TARGET.
12136 *
12137 * *BASE_P TIP
12138 * o-------o-----------o--- SOURCE_BRANCH
12139 * / \
12140 * -----o prev. \
12141 * YCA \ merges \
12142 * o-----------o----------- TARGET branch
12143 *
12144 * In terms of mergeinfo:
12145 *
12146 * Source a--... o=change, -=no-op revision
12147 * branch / \
12148 * YCA --> o a---o---o---o---o--- d=delete, a=add-as-a-copy
12149 *
12150 * Eligible -.eee.eeeeeeeeeeeeeeeeeeee .=not a source branch location
12151 *
12152 * Tgt-mi -.mmm.mm-mm-------m------- m=merged to root of TARGET or
12153 * subtree of TARGET with no
12154 * operative changes outside of that
12155 * subtree, -=not merged
12156 *
12157 * Eligible -.---.--e--eeeeeee-eeeeeee
12158 *
12159 * Next --------^----------------- BASE is just before here.
12160 *
12161 * / \
12162 * -----o prev. \
12163 * YCA \ merges \
12164 * o-----------o-------------
12165 *
12166 * If no revisions from SOURCE_BRANCH have been completely merged to TARGET,
12167 * then set *BASE_P to the YCA.
12168 */
12169 static svn_error_t *
find_last_merged_location(svn_client__pathrev_t ** base_p,svn_client__pathrev_t * yca,const branch_history_t * source_branch,svn_client__pathrev_t * target,svn_client_ctx_t * ctx,svn_ra_session_t * ra_session,apr_pool_t * result_pool,apr_pool_t * scratch_pool)12170 find_last_merged_location(svn_client__pathrev_t **base_p,
12171 svn_client__pathrev_t *yca,
12172 const branch_history_t *source_branch,
12173 svn_client__pathrev_t *target,
12174 svn_client_ctx_t *ctx,
12175 svn_ra_session_t *ra_session,
12176 apr_pool_t *result_pool,
12177 apr_pool_t *scratch_pool)
12178 {
12179 svn_opt_revision_t source_peg_rev, source_start_rev, source_end_rev,
12180 target_opt_rev;
12181 svn_revnum_t youngest_merged_rev = SVN_INVALID_REVNUM;
12182 svn_mergeinfo_catalog_t target_mergeinfo_cat = NULL;
12183
12184 source_peg_rev.kind = svn_opt_revision_number;
12185 source_peg_rev.value.number = source_branch->tip->rev;
12186 source_start_rev.kind = svn_opt_revision_number;
12187 source_start_rev.value.number = yca->rev;
12188 source_end_rev.kind = svn_opt_revision_number;
12189 source_end_rev.value.number = source_branch->tip->rev;
12190 target_opt_rev.kind = svn_opt_revision_number;
12191 target_opt_rev.value.number = target->rev;
12192
12193 /* Find the youngest revision fully merged from SOURCE_BRANCH to TARGET,
12194 if such a revision exists. */
12195 SVN_ERR(short_circuit_mergeinfo_log(&target_mergeinfo_cat,
12196 TRUE, /* Find merged */
12197 target->url, &target_opt_rev,
12198 source_branch->tip->url,
12199 &source_peg_rev,
12200 &source_end_rev, &source_start_rev,
12201 operative_rev_receiver,
12202 &youngest_merged_rev,
12203 ctx, ra_session,
12204 result_pool, scratch_pool));
12205
12206 if (!SVN_IS_VALID_REVNUM(youngest_merged_rev))
12207 {
12208 /* No revisions have been completely merged from SOURCE_BRANCH to
12209 TARGET so the base for the next merge is the YCA. */
12210 *base_p = yca;
12211 }
12212 else
12213 {
12214 /* One or more revisions have already been completely merged from
12215 SOURCE_BRANCH to TARGET, now find the oldest revision, older
12216 than the youngest merged revision, which is still eligible to
12217 be merged, if such exists. */
12218 branch_history_t *contiguous_source;
12219 svn_revnum_t base_rev;
12220 svn_revnum_t oldest_eligible_rev = SVN_INVALID_REVNUM;
12221
12222 /* If the only revisions eligible are younger than the youngest merged
12223 revision we can simply assume that the youngest eligible revision
12224 is the youngest merged revision. Obviously this may not be true!
12225 The revisions between the youngest merged revision and the tip of
12226 the branch may have several inoperative revisions -- they may *all*
12227 be inoperative revisions! But for the purpose of this function
12228 (i.e. finding the youngest revision after the YCA where all revs have
12229 been merged) that doesn't matter. */
12230 source_end_rev.value.number = youngest_merged_rev;
12231 SVN_ERR(short_circuit_mergeinfo_log(&target_mergeinfo_cat,
12232 FALSE, /* Find eligible */
12233 target->url, &target_opt_rev,
12234 source_branch->tip->url,
12235 &source_peg_rev,
12236 &source_start_rev, &source_end_rev,
12237 operative_rev_receiver,
12238 &oldest_eligible_rev,
12239 ctx, ra_session,
12240 scratch_pool, scratch_pool));
12241
12242 /* If there are revisions eligible for merging, use the oldest one
12243 to calculate the base. Otherwise there are no operative revisions
12244 to merge and we can simple set the base to the youngest revision
12245 already merged. */
12246 if (SVN_IS_VALID_REVNUM(oldest_eligible_rev))
12247 base_rev = oldest_eligible_rev - 1;
12248 else
12249 base_rev = youngest_merged_rev;
12250
12251 /* Find the branch location just before the oldest eligible rev.
12252 (We can't just use the base revs calculated above because the branch
12253 might have a gap there.) */
12254 SVN_ERR(branch_history_intersect_range(&contiguous_source,
12255 source_branch, yca->rev,
12256 base_rev,
12257 scratch_pool, scratch_pool));
12258 SVN_ERR(branch_history_get_endpoints(NULL, base_p, contiguous_source,
12259 result_pool, scratch_pool));
12260 }
12261
12262 return SVN_NO_ERROR;
12263 }
12264
12265 /* Find a merge base location on the target branch, like in a sync
12266 * merge.
12267 *
12268 * BASE S_T->source
12269 * o-------o-----------o---
12270 * / \ \
12271 * -----o prev. \ \ this
12272 * YCA \ merge \ \ merge
12273 * o-----------o-----------o
12274 * S_T->target
12275 *
12276 * Set *BASE_P to BASE, the youngest location in the history of S_T->source
12277 * (at or after the YCA) at which all revisions up to BASE are effectively
12278 * merged into S_T->target.
12279 *
12280 * If no locations on the history of S_T->source are effectively merged to
12281 * S_T->target, set *BASE_P to the YCA.
12282 */
12283 static svn_error_t *
find_base_on_source(svn_client__pathrev_t ** base_p,source_and_target_t * s_t,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)12284 find_base_on_source(svn_client__pathrev_t **base_p,
12285 source_and_target_t *s_t,
12286 svn_client_ctx_t *ctx,
12287 apr_pool_t *result_pool,
12288 apr_pool_t *scratch_pool)
12289 {
12290 SVN_ERR(find_last_merged_location(base_p,
12291 s_t->yca,
12292 &s_t->source_branch,
12293 s_t->target_branch.tip,
12294 ctx,
12295 s_t->source_ra_session,
12296 result_pool, scratch_pool));
12297 return SVN_NO_ERROR;
12298 }
12299
12300 /* Find a merge base location on the target branch, like in a reintegrate
12301 * merge.
12302 *
12303 * S_T->source
12304 * o-----------o-------o---
12305 * / prev. / \
12306 * -----o merge / \ this
12307 * YCA \ / \ merge
12308 * o-------o---------------o
12309 * BASE S_T->target
12310 *
12311 * Set *BASE_P to BASE, the youngest location in the history of S_T->target
12312 * (at or after the YCA) at which all revisions up to BASE are effectively
12313 * merged into S_T->source.
12314 *
12315 * If no locations on the history of S_T->target are effectively merged to
12316 * S_T->source, set *BASE_P to the YCA.
12317 */
12318 static svn_error_t *
find_base_on_target(svn_client__pathrev_t ** base_p,source_and_target_t * s_t,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)12319 find_base_on_target(svn_client__pathrev_t **base_p,
12320 source_and_target_t *s_t,
12321 svn_client_ctx_t *ctx,
12322 apr_pool_t *result_pool,
12323 apr_pool_t *scratch_pool)
12324 {
12325 SVN_ERR(find_last_merged_location(base_p,
12326 s_t->yca,
12327 &s_t->target_branch,
12328 s_t->source,
12329 ctx,
12330 s_t->target_ra_session,
12331 result_pool, scratch_pool));
12332
12333 return SVN_NO_ERROR;
12334 }
12335
12336 /* The body of client_find_automatic_merge(), which see.
12337 */
12338 static svn_error_t *
find_automatic_merge(svn_client__pathrev_t ** base_p,svn_boolean_t * is_reintegrate_like,source_and_target_t * s_t,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)12339 find_automatic_merge(svn_client__pathrev_t **base_p,
12340 svn_boolean_t *is_reintegrate_like,
12341 source_and_target_t *s_t,
12342 svn_client_ctx_t *ctx,
12343 apr_pool_t *result_pool,
12344 apr_pool_t *scratch_pool)
12345 {
12346 svn_client__pathrev_t *base_on_source, *base_on_target;
12347
12348 /* Get the location-history of each branch. */
12349 s_t->source_branch.tip = s_t->source;
12350 SVN_ERR(svn_client__get_history_as_mergeinfo(
12351 &s_t->source_branch.history, &s_t->source_branch.has_r0_history,
12352 s_t->source, SVN_INVALID_REVNUM, SVN_INVALID_REVNUM,
12353 s_t->source_ra_session, ctx, scratch_pool));
12354 s_t->target_branch.tip = &s_t->target->loc;
12355 SVN_ERR(svn_client__get_history_as_mergeinfo(
12356 &s_t->target_branch.history, &s_t->target_branch.has_r0_history,
12357 &s_t->target->loc, SVN_INVALID_REVNUM, SVN_INVALID_REVNUM,
12358 s_t->target_ra_session, ctx, scratch_pool));
12359
12360 SVN_ERR(svn_client__calc_youngest_common_ancestor(
12361 &s_t->yca, s_t->source, s_t->source_branch.history,
12362 s_t->source_branch.has_r0_history,
12363 &s_t->target->loc, s_t->target_branch.history,
12364 s_t->target_branch.has_r0_history,
12365 result_pool, scratch_pool));
12366
12367 if (! s_t->yca)
12368 return svn_error_createf(SVN_ERR_CLIENT_NOT_READY_TO_MERGE, NULL,
12369 _("'%s@%ld' must be ancestrally related to "
12370 "'%s@%ld'"),
12371 s_t->source->url, s_t->source->rev,
12372 s_t->target->loc.url, s_t->target->loc.rev);
12373
12374 /* Find the latest revision of A synced to B and the latest
12375 * revision of B synced to A.
12376 *
12377 * base_on_source = youngest_complete_synced_point(source, target)
12378 * base_on_target = youngest_complete_synced_point(target, source)
12379 */
12380 SVN_ERR(find_base_on_source(&base_on_source, s_t,
12381 ctx, scratch_pool, scratch_pool));
12382 SVN_ERR(find_base_on_target(&base_on_target, s_t,
12383 ctx, scratch_pool, scratch_pool));
12384
12385 /* Choose a base. */
12386 if (base_on_source->rev >= base_on_target->rev)
12387 {
12388 *base_p = base_on_source;
12389 *is_reintegrate_like = FALSE;
12390 }
12391 else
12392 {
12393 *base_p = base_on_target;
12394 *is_reintegrate_like = TRUE;
12395 }
12396
12397 return SVN_NO_ERROR;
12398 }
12399
12400 /** Find out what kind of automatic merge would be needed, when the target
12401 * is only known as a repository location rather than a WC.
12402 *
12403 * Like find_automatic_merge() except that the target is
12404 * specified by @a target_path_or_url at @a target_revision, which must
12405 * refer to a repository location, instead of by a WC path argument.
12406 */
12407 static svn_error_t *
find_automatic_merge_no_wc(automatic_merge_t ** merge_p,const char * source_path_or_url,const svn_opt_revision_t * source_revision,const char * target_path_or_url,const svn_opt_revision_t * target_revision,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)12408 find_automatic_merge_no_wc(automatic_merge_t **merge_p,
12409 const char *source_path_or_url,
12410 const svn_opt_revision_t *source_revision,
12411 const char *target_path_or_url,
12412 const svn_opt_revision_t *target_revision,
12413 svn_client_ctx_t *ctx,
12414 apr_pool_t *result_pool,
12415 apr_pool_t *scratch_pool)
12416 {
12417 source_and_target_t *s_t = apr_palloc(scratch_pool, sizeof(*s_t));
12418 svn_client__pathrev_t *target_loc;
12419 automatic_merge_t *merge = apr_palloc(result_pool, sizeof(*merge));
12420
12421 /* Source */
12422 SVN_ERR(svn_client__ra_session_from_path2(
12423 &s_t->source_ra_session, &s_t->source,
12424 source_path_or_url, NULL, source_revision, source_revision,
12425 ctx, result_pool));
12426
12427 /* Target */
12428 SVN_ERR(svn_client__ra_session_from_path2(
12429 &s_t->target_ra_session, &target_loc,
12430 target_path_or_url, NULL, target_revision, target_revision,
12431 ctx, result_pool));
12432 s_t->target = apr_palloc(scratch_pool, sizeof(*s_t->target));
12433 s_t->target->abspath = NULL; /* indicate the target is not a WC */
12434 s_t->target->loc = *target_loc;
12435
12436 SVN_ERR(find_automatic_merge(&merge->base, &merge->is_reintegrate_like, s_t,
12437 ctx, result_pool, scratch_pool));
12438
12439 merge->right = s_t->source;
12440 merge->target = &s_t->target->loc;
12441 merge->yca = s_t->yca;
12442 *merge_p = merge;
12443
12444 return SVN_NO_ERROR;
12445 }
12446
12447 /* Find the information needed to merge all unmerged changes from a source
12448 * branch into a target branch.
12449 *
12450 * Set @a *merge_p to the information needed to merge all unmerged changes
12451 * (up to @a source_revision) from the source branch @a source_path_or_url
12452 * at @a source_revision into the target WC at @a target_abspath.
12453 *
12454 * The flags @a allow_mixed_rev, @a allow_local_mods and
12455 * @a allow_switched_subtrees enable merging into a WC that is in any or all
12456 * of the states described by their names, but only if this function decides
12457 * that the merge will be in the same direction as the last automatic merge.
12458 * If, on the other hand, the last automatic merge was in the opposite
12459 * direction, then such states of the WC are not allowed regardless
12460 * of these flags. This function merely records these flags in the
12461 * @a *merge_p structure; do_automatic_merge_locked() checks the WC
12462 * state for compliance.
12463 *
12464 * Allocate the @a *merge_p structure in @a result_pool.
12465 */
12466 static svn_error_t *
client_find_automatic_merge(automatic_merge_t ** merge_p,const char * source_path_or_url,const svn_opt_revision_t * source_revision,const char * target_abspath,svn_boolean_t allow_mixed_rev,svn_boolean_t allow_local_mods,svn_boolean_t allow_switched_subtrees,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)12467 client_find_automatic_merge(automatic_merge_t **merge_p,
12468 const char *source_path_or_url,
12469 const svn_opt_revision_t *source_revision,
12470 const char *target_abspath,
12471 svn_boolean_t allow_mixed_rev,
12472 svn_boolean_t allow_local_mods,
12473 svn_boolean_t allow_switched_subtrees,
12474 svn_client_ctx_t *ctx,
12475 apr_pool_t *result_pool,
12476 apr_pool_t *scratch_pool)
12477 {
12478 source_and_target_t *s_t = apr_palloc(result_pool, sizeof(*s_t));
12479 automatic_merge_t *merge = apr_palloc(result_pool, sizeof(*merge));
12480
12481 /* "Open" the target WC. Check the target WC for mixed-rev, local mods and
12482 * switched subtrees yet to faster exit and notify user before contacting
12483 * with server. After we find out what kind of merge is required, then if a
12484 * reintegrate-like merge is required we'll do the stricter checks, in
12485 * do_automatic_merge_locked(). */
12486 SVN_ERR(open_target_wc(&s_t->target, target_abspath,
12487 allow_mixed_rev,
12488 allow_local_mods,
12489 allow_switched_subtrees,
12490 ctx, result_pool, scratch_pool));
12491
12492 /* Open RA sessions to the source and target trees. */
12493 SVN_ERR(svn_client_open_ra_session2(&s_t->target_ra_session,
12494 s_t->target->loc.url,
12495 s_t->target->abspath,
12496 ctx, result_pool, scratch_pool));
12497 /* ### check for null URL (i.e. added path) here, like in reintegrate? */
12498 SVN_ERR(svn_client__ra_session_from_path2(
12499 &s_t->source_ra_session, &s_t->source,
12500 source_path_or_url, NULL, source_revision, source_revision,
12501 ctx, result_pool));
12502
12503 /* Check source is in same repos as target. */
12504 SVN_ERR(check_same_repos(s_t->source, source_path_or_url,
12505 &s_t->target->loc, target_abspath,
12506 TRUE /* strict_urls */, scratch_pool));
12507
12508 SVN_ERR(find_automatic_merge(&merge->base, &merge->is_reintegrate_like, s_t,
12509 ctx, result_pool, scratch_pool));
12510 merge->yca = s_t->yca;
12511 merge->right = s_t->source;
12512 merge->allow_mixed_rev = allow_mixed_rev;
12513 merge->allow_local_mods = allow_local_mods;
12514 merge->allow_switched_subtrees = allow_switched_subtrees;
12515
12516 *merge_p = merge;
12517
12518 /* TODO: Close the source and target sessions here? */
12519
12520 return SVN_NO_ERROR;
12521 }
12522
12523 /* Perform an automatic merge, given the information in MERGE which
12524 * must have come from calling client_find_automatic_merge().
12525 *
12526 * Four locations are inputs: YCA, BASE, RIGHT, TARGET, as shown
12527 * depending on whether the base is on the source branch or the target
12528 * branch of this merge.
12529 *
12530 * RIGHT (is_reintegrate_like)
12531 * o-----------o-------o---
12532 * / prev. / \
12533 * -----o merge / \ this
12534 * YCA \ / \ merge
12535 * o-------o---------------o
12536 * BASE TARGET
12537 *
12538 * or
12539 *
12540 * BASE RIGHT (! is_reintegrate_like)
12541 * o-------o-----------o---
12542 * / \ \
12543 * -----o prev. \ \ this
12544 * YCA \ merge \ \ merge
12545 * o-----------o-----------o
12546 * TARGET
12547 *
12548 * ### TODO: The reintegrate-like code path does not yet
12549 * eliminate already-cherry-picked revisions from the source.
12550 */
12551 static svn_error_t *
do_automatic_merge_locked(conflict_report_t ** conflict_report,const automatic_merge_t * merge,const char * target_abspath,svn_depth_t depth,svn_boolean_t diff_ignore_ancestry,svn_boolean_t force_delete,svn_boolean_t record_only,svn_boolean_t dry_run,const apr_array_header_t * merge_options,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)12552 do_automatic_merge_locked(conflict_report_t **conflict_report,
12553 const automatic_merge_t *merge,
12554 const char *target_abspath,
12555 svn_depth_t depth,
12556 svn_boolean_t diff_ignore_ancestry,
12557 svn_boolean_t force_delete,
12558 svn_boolean_t record_only,
12559 svn_boolean_t dry_run,
12560 const apr_array_header_t *merge_options,
12561 svn_client_ctx_t *ctx,
12562 apr_pool_t *result_pool,
12563 apr_pool_t *scratch_pool)
12564 {
12565 merge_target_t *target;
12566 svn_boolean_t reintegrate_like = merge->is_reintegrate_like;
12567 svn_boolean_t use_sleep = FALSE;
12568 svn_error_t *err;
12569
12570 SVN_ERR(open_target_wc(&target, target_abspath,
12571 merge->allow_mixed_rev && ! reintegrate_like,
12572 merge->allow_local_mods && ! reintegrate_like,
12573 merge->allow_switched_subtrees && ! reintegrate_like,
12574 ctx, scratch_pool, scratch_pool));
12575
12576 if (reintegrate_like)
12577 {
12578 merge_source_t source;
12579 svn_ra_session_t *base_ra_session = NULL;
12580 svn_ra_session_t *right_ra_session = NULL;
12581 svn_ra_session_t *target_ra_session = NULL;
12582
12583 if (record_only)
12584 return svn_error_create(SVN_ERR_INCORRECT_PARAMS, NULL,
12585 _("The required merge is reintegrate-like, "
12586 "and the record-only option "
12587 "cannot be used with this kind of merge"));
12588
12589 if (depth != svn_depth_unknown)
12590 return svn_error_create(SVN_ERR_INCORRECT_PARAMS, NULL,
12591 _("The required merge is reintegrate-like, "
12592 "and the depth option "
12593 "cannot be used with this kind of merge"));
12594
12595 if (force_delete)
12596 return svn_error_create(SVN_ERR_INCORRECT_PARAMS, NULL,
12597 _("The required merge is reintegrate-like, "
12598 "and the force_delete option "
12599 "cannot be used with this kind of merge"));
12600
12601 SVN_ERR(ensure_ra_session_url(&base_ra_session, merge->base->url,
12602 target->abspath, ctx, scratch_pool));
12603 SVN_ERR(ensure_ra_session_url(&right_ra_session, merge->right->url,
12604 target->abspath, ctx, scratch_pool));
12605 SVN_ERR(ensure_ra_session_url(&target_ra_session, target->loc.url,
12606 target->abspath, ctx, scratch_pool));
12607
12608 /* Check for and reject any abnormalities -- such as revisions that
12609 * have not yet been merged in the opposite direction -- that a
12610 * 'reintegrate' merge would have rejected. */
12611 {
12612 merge_source_t *source2;
12613
12614 SVN_ERR(find_reintegrate_merge(&source2, NULL,
12615 right_ra_session, merge->right,
12616 target_ra_session, target,
12617 ctx, scratch_pool, scratch_pool));
12618 }
12619
12620 source.loc1 = merge->base;
12621 source.loc2 = merge->right;
12622 source.ancestral = ! merge->is_reintegrate_like;
12623
12624 err = merge_cousins_and_supplement_mergeinfo(conflict_report,
12625 &use_sleep,
12626 target,
12627 base_ra_session,
12628 right_ra_session,
12629 &source, merge->yca,
12630 TRUE /* same_repos */,
12631 depth,
12632 FALSE /*diff_ignore_ancestry*/,
12633 force_delete, record_only,
12634 dry_run,
12635 merge_options,
12636 ctx,
12637 result_pool, scratch_pool);
12638 }
12639 else /* ! merge->is_reintegrate_like */
12640 {
12641 /* Ignoring the base that we found, we pass the YCA instead and let
12642 do_merge() work out which subtrees need which revision ranges to
12643 be merged. This enables do_merge() to fill in revision-range
12644 gaps that are older than the base that we calculated (which is
12645 for the root path of the merge).
12646
12647 An improvement would be to change find_automatic_merge() to
12648 find the base for each sutree, and then here use the oldest base
12649 among all subtrees. */
12650 apr_array_header_t *merge_sources;
12651 svn_ra_session_t *ra_session = NULL;
12652
12653 /* Normalize our merge sources, do_merge() requires this. See the
12654 'MERGEINFO MERGE SOURCE NORMALIZATION' global comment. */
12655 SVN_ERR(ensure_ra_session_url(&ra_session, merge->right->url,
12656 target->abspath, ctx, scratch_pool));
12657 SVN_ERR(normalize_merge_sources_internal(
12658 &merge_sources, merge->right,
12659 svn_rangelist__initialize(merge->yca->rev, merge->right->rev, TRUE,
12660 scratch_pool),
12661 ra_session, ctx, scratch_pool, scratch_pool));
12662
12663 err = do_merge(NULL, NULL, conflict_report, &use_sleep,
12664 merge_sources, target, ra_session,
12665 TRUE /*related*/, TRUE /*same_repos*/,
12666 FALSE /*ignore_mergeinfo*/, diff_ignore_ancestry,
12667 force_delete, dry_run,
12668 record_only, NULL, FALSE, FALSE, depth, merge_options,
12669 ctx, result_pool, scratch_pool);
12670 }
12671
12672 if (use_sleep)
12673 svn_io_sleep_for_timestamps(target_abspath, scratch_pool);
12674
12675 SVN_ERR(err);
12676
12677 return SVN_NO_ERROR;
12678 }
12679
12680 svn_error_t *
svn_client_get_merging_summary(svn_boolean_t * needs_reintegration,const char ** yca_url,svn_revnum_t * yca_rev,const char ** base_url,svn_revnum_t * base_rev,const char ** right_url,svn_revnum_t * right_rev,const char ** target_url,svn_revnum_t * target_rev,const char ** repos_root_url,const char * source_path_or_url,const svn_opt_revision_t * source_revision,const char * target_path_or_url,const svn_opt_revision_t * target_revision,svn_client_ctx_t * ctx,apr_pool_t * result_pool,apr_pool_t * scratch_pool)12681 svn_client_get_merging_summary(svn_boolean_t *needs_reintegration,
12682 const char **yca_url, svn_revnum_t *yca_rev,
12683 const char **base_url, svn_revnum_t *base_rev,
12684 const char **right_url, svn_revnum_t *right_rev,
12685 const char **target_url, svn_revnum_t *target_rev,
12686 const char **repos_root_url,
12687 const char *source_path_or_url,
12688 const svn_opt_revision_t *source_revision,
12689 const char *target_path_or_url,
12690 const svn_opt_revision_t *target_revision,
12691 svn_client_ctx_t *ctx,
12692 apr_pool_t *result_pool,
12693 apr_pool_t *scratch_pool)
12694 {
12695 svn_boolean_t target_is_wc;
12696 automatic_merge_t *merge;
12697
12698 target_is_wc = (! svn_path_is_url(target_path_or_url))
12699 && (target_revision->kind == svn_opt_revision_unspecified
12700 || target_revision->kind == svn_opt_revision_working);
12701 if (target_is_wc)
12702 SVN_ERR(client_find_automatic_merge(
12703 &merge,
12704 source_path_or_url, source_revision,
12705 target_path_or_url,
12706 TRUE, TRUE, TRUE, /* allow_* */
12707 ctx, scratch_pool, scratch_pool));
12708 else
12709 SVN_ERR(find_automatic_merge_no_wc(
12710 &merge,
12711 source_path_or_url, source_revision,
12712 target_path_or_url, target_revision,
12713 ctx, scratch_pool, scratch_pool));
12714
12715 if (needs_reintegration)
12716 *needs_reintegration = merge->is_reintegrate_like;
12717 if (yca_url)
12718 *yca_url = apr_pstrdup(result_pool, merge->yca->url);
12719 if (yca_rev)
12720 *yca_rev = merge->yca->rev;
12721 if (base_url)
12722 *base_url = apr_pstrdup(result_pool, merge->base->url);
12723 if (base_rev)
12724 *base_rev = merge->base->rev;
12725 if (right_url)
12726 *right_url = apr_pstrdup(result_pool, merge->right->url);
12727 if (right_rev)
12728 *right_rev = merge->right->rev;
12729 if (target_url)
12730 *target_url = apr_pstrdup(result_pool, merge->target->url);
12731 if (target_rev)
12732 *target_rev = merge->target->rev;
12733 if (repos_root_url)
12734 *repos_root_url = apr_pstrdup(result_pool, merge->yca->repos_root_url);
12735
12736 return SVN_NO_ERROR;
12737 }
12738