Patch Task

## Patch

### Description

Applies a diff file to originals. ; requires "patch" to be on the execution path.

### Parameters

Attribute | Description | Required
patchfile | the file that includes the diff output | Yes
originalfile | the file to patch | No, tries to guess it from the diff file
destfile | the file to send the output to instead of patching the file(s) in place. since Apache Ant 1.6 | No.
backups | Keep backups of the unpatched files | No
quiet | Work silently unless an error occurs | No
reverse | Assume patch was created with old and new files swapped. | No
ignorewhitespace | Ignore whitespace differences. | No
strip | Strip the smallest prefix containing num leading slashes from filenames. | No
dir | The directory in which to run the patch command. | No, default is the project's basedir.
failonerror | Stop the buildprocess if the command exits with a return code signaling failure. Defaults to false. since Ant 1.8.0 | No

### Examples

      <patch patchfile="module.1.0-1.1.patch"/>

applies the diff included in module.1.0-1.1.patch to the files in base directory guessing the filename(s) from the diff output.

      <patch patchfile="module.1.0-1.1.patch" strip="1"/>

like above but one leading directory part will be removed. i.e. if the diff output looked like

    --- a/mod1.0/A	Mon Jun  5 17:28:41 2000
    +++ a/mod1.1/A	Mon Jun  5 17:28:49 2000

the leading a/ will be stripped.