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apply

git apply is a command used to apply a patch to files and/or the index. It reads the supplied diff output (patch) and applies it to the working directory. This is useful for applying changes that were generated by git diff or git format-patch.

Basic Usage

  1. Applying a Patch File

    To apply a patch file to your working directory, use the following command:

    git apply patch_file.patch

    This will apply the changes described in patch_file.patch to your working directory.

  2. Applying a Patch from Standard Input

    You can also apply a patch directly from standard input:

    git apply < patch_file.patch

  3. Applying a Patch with Verbose Output

    To see more detailed output while applying a patch, use the --verbose option:

    git apply --verbose patch_file.patch

  4. Checking if a Patch Can Be Applied

    Before actually applying a patch, you can check if it can be applied cleanly using the --check option:

    git apply --check patch_file.patch

  5. Applying a Patch in Reverse

    If you need to undo a patch, you can apply it in reverse using the -R option:

    git apply -R patch_file.patch

Example

Suppose you have a patch file named fix_bug.patch with the following content:

diff --git a/file.txt b/file.txt index 83db48f..bf3a5c6 100644 --- a/file.txt +++ b/file.txt @@ -1,3 +1,3 @@ -Hello, World! +Hello, Git! This is a sample file.

To apply this patch to your repository, you would run:

git apply fix_bug.patch

After running this command, the changes described in fix_bug.patch will be applied to file.txt in your working directory.

Last modified: 29 November 2024
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