Commit Hooks

commit-msg Hook

  • File: .git/hooks/commit-msg
  • Source file: Build/git-hooks/commit-msg

This hook is mandatory. It must be used for core contribution!

First of all, this hook will be executed whenever you do a commit on your local machine.

The most important task of the hook is to generate a unique Change-Id for your commit. This Change-Id is mandatory for Gerrit to identify your change. There is no way around this and it is not up for discussion :) This Change-Id will only be generated if it is not yet present in your commit message - please do not try to come up with a Change-Id on your own, the result will be chaos.

Apart from that the hook will check your commit message for logical errors like missing keywords, Resolves lines etc. For detailed information on the format of a commit message, click here.

If the commit-msg hook finds errors in your commit-msg, you can try again, by ammending to the commit:

git commit --amend

pre-commit Hook

  • File: .git/hooks/pre-commit
  • Source file: Build/git-hooks/unix+mac/pre-commit
  • This hook is optional. This hook is not available for Windows.

The pre-commit hook checks all added PHP files staged for the commit for Coding Guideline issues and will report any problems it finds.

To fix the issues, see cglFixMyCommit.

After fixing the files you must amend your commit:

git commit -a --amend

Post-checkout hook for composer update

If you want to run composer update for each checkout (e.g. when switching branches, tags, etc), then you can use the post-checkout commit hook.

Create a file named .git/hooks/post-checkout with the following contents:

#!/usr/bin/env python3
#-*- coding: utf-8 -*-

"""A post-checkout git hook to execute `composer install`

:Author: Philipp Gampe
"""

import subprocess
import string
import os
import sys

PATH_TO_COMPOSER = '/home/phil/bin/composer.phar'
HOOK_DIR = os.path.dirname(os.path.realpath(__file__))
GIT_ROOT_DIR = os.path.dirname(os.path.dirname(HOOK_DIR))

def main():
    if sys.argv[3] == '1':
        os.chdir(GIT_ROOT_DIR)
        return subprocess.run([PATH_TO_COMPOSER, 'install'], timeout=30)

if __name__ == '__main__':
    result = main()
    if result:
        exit(result.returncode)
    else:
        exit(0)

Important

You need to adjust the PATH_TO_COMPOSER variable, that is defined after the import statements. Additionally the python3 executable needs to be available in your PATH.