git-apply(1)

# git-apply(1) Manual Page

## NAME

git-apply - Apply a patch on a git index file and a working tree

## SYNOPSIS

git apply [--stat] [--numstat] [--summary] [--check] [--index] [--apply] [--no-add] [--build-fake-ancestor <file>] [-R | --reverse] [--allow-binary-replacement | --binary] [--reject] [-z] [-pNUM] [-CNUM] [--inaccurate-eof] [--recount] [--cached] [--whitespace=<nowarn|warn|fix|error|error-all>] [--exclude=PATH] [--include=PATH] [--directory=<root>] [--verbose] [<patch>…]

## DESCRIPTION

Reads supplied diff output and applies it on a git index file and a work tree.

## OPTIONS

<patch>…

  The files to read patch from. - can be used to read from the standard input.

--stat

  Instead of applying the patch, output diffstat for the input. Turns off "apply".

--numstat

  Similar to --stat, but shows number of added and deleted lines in decimal notation and pathname without abbreviation, to make it more machine friendly. For binary files, outputs two `-` instead of saying `0 0`. Turns off "apply".

--summary

  Instead of applying the patch, output a condensed summary of information obtained from git diff extended headers, such as creations, renames and mode changes. Turns off "apply".

--check

  Instead of applying the patch, see if the patch is applicable to the current work tree and/or the index file and detects errors. Turns off "apply".

--index

  When --check is in effect, or when applying the patch (which is the default when none of the options that disables it is in effect), make sure the patch is applicable to what the current index file records. If the file to be patched in the work tree is not up-to-date, it is flagged as an error. This flag also causes the index file to be updated.

--cached

  Apply a patch without touching the working tree. Instead, take the cached data, apply the patch, and store the result in the index, without using the working tree. This implies --index.

--build-fake-ancestor <file>

  Newer git-diff output has embedded index information for each blob to help identify the original version that the patch applies to. When this flag is given, and if the original versions of the blobs is available locally, builds a temporary index containing those blobs.

  When a pure mode change is encountered (which has no index information), the information is read from the current index instead.

-R
--reverse

  Apply the patch in reverse.

--reject

  For atomicity, git-apply by default fails the whole patch and does not touch the working tree when some of the hunks do not apply. This option makes it apply the parts of the patch that are applicable, and leave the rejected hunks in corresponding *.rej files.

-z

  When showing the index information, do not munge paths, but use NUL terminated machine readable format. Without this flag, the pathnames output will have TAB, LF, and backslash characters replaced with `\t`, `\n`, and `\\`, respectively.

-p<n>

  Remove <n> leading slashes from traditional diff paths. The default is 1.

-C<n>

  Ensure at least <n> lines of surrounding context match before and after each change. When fewer lines of surrounding context exist they all must match. By default no context is ever ignored.

--unidiff-zero

  By default, git-apply expects that the patch being applied is a unified diff with at least one line of context. This provides good safety measures, but breaks down when applying a diff generated with --unified=0. To bypass these checks use --unidiff-zero.

  Note, for the reasons stated above usage of context-free patches are discouraged.

--apply

  If you use any of the options marked "Turns off apply" above, git-apply reads and outputs the information you asked without actually applying the patch. Give this flag after those flags to also apply the patch.

--no-add

  When applying a patch, ignore additions made by the patch. This can be used to extract the common part between two files by first running diff on them and applying the result with this option, which would apply the deletion part but not addition part.

--allow-binary-replacement
--binary

  Historically we did not allow binary patch applied without an explicit permission from the user, and this flag was the way to do so. Currently we always allow binary patch application, so this is a no-op.

--exclude=<path-pattern>

  Don't apply changes to files matching the given path pattern. This can be useful when importing patchsets, where you want to exclude certain files or directories.

--include=<path-pattern>

  Apply changes to files matching the given path pattern. This can be useful when importing patchsets, where you want to include certain files or directories.

  When --exclude and --include patterns are used, they are examined in the order they appear on the command line, and the first match determines if a patch to each path is used. A patch to a path that does not match any include/exclude pattern is used by default if there is no include pattern on the command line, and ignored if there is any include pattern.

--whitespace=<action>

  When applying a patch, detect a new or modified line that has whitespace errors. What are considered whitespace errors is controlled by `core.whitespace` configuration. By default, trailing whitespaces (including lines that solely consist of whitespaces) and a space character that is immediately followed by a tab character inside the initial indent of the line are considered whitespace errors.

  By default, the command outputs warning messages but applies the patch. When `git-apply is used for statistics and not applying a patch, it defaults to `nowarn`.

  You can use different `<action>` to control this behavior:

  - `nowarn` turns off the trailing whitespace warning.

  - `warn` outputs warnings for a few such errors, but applies the patch as-is (default).

  - `fix` outputs warnings for a few such errors, and applies the patch after fixing them (`strip` is a synonym --- the tool used to consider only trailing whitespaces as errors, and the fix involved stripping them, but modern gits do more).

  - `error` outputs warnings for a few such errors, and refuses to apply the patch.

  - `error-all` is similar to `error` but shows all errors.

--inaccurate-eof

  Under certain circumstances, some versions of diff do not correctly detect a missing new-line at the end of the file. As a result, patches created by such diff programs do not record incomplete lines correctly. This option adds support for applying such patches by working around this bug.

-v
--verbose

  Report progress to stderr. By default, only a message about the current patch being applied will be printed. This option will cause additional information to be reported.

--recount

  Do not trust the line counts in the hunk headers, but infer them by inspecting the patch (e.g. after editing the patch without adjusting the hunk headers appropriately).

--directory=<root>

  Prepend <root> to all filenames. If a "-p" argument was passed, too, it is applied before prepending the new root.

  For example, a patch that talks about updating `a/git-gui.sh` to `b/git-gui.sh` can be applied to the file in the working tree `modules/git-gui/git-gui.sh` by running `git apply --directory=modules/git-gui`.

## Configuration

apply.whitespace

  When no `--whitespace` flag is given from the command line, this configuration item is used as the default.

## Submodules

If the patch contains any changes to submodules then git-apply treats these changes as follows.

If --index is specified (explicitly or implicitly), then the submodule commits must match the index exactly for the patch to apply. If any of the submodules are checked-out, then these check-outs are completely ignored, i.e., they are not required to be up-to-date or clean and they are not updated.

If --index is not specified, then the submodule commits in the patch are ignored and only the absence of presence of the corresponding subdirectory is checked and (if possible) updated.

## Author

Written by Linus Torvalds <torvalds@osdl.org>

## Documentation

Documentation by Junio C Hamano

## GIT

Part of the git(1) suite