Git hooks#

Git hooks are scripts that are automatically executed when certain events occur in a Git repository, including:

Command	Hook
`comit`	`comit-msg`, `pre-commit`
`merge`	`pre-merge`, `comit-msg`
`rebase`	`pre-rebase`
`pull`	`pre-merge`, `comit-msg`
`push`	`pre-push`

They can be located either in local or server-side repositories. This allows Git repositories to be customised and user-defined actions to be triggered.

Git hooks are located in the .git/hooks/ directory. When a repository is created, some sample scripts are already created there:

.git/hooks/
├── applypatch-msg.sample
├── commit-msg.sample
├── fsmonitor-watchman.sample
├── post-update.sample
├── pre-applypatch.sample
├── pre-commit.sample
├── pre-merge-commit.sample
├── prepare-commit-msg.sample
├── pre-push.sample
├── pre-rebase.sample
├── pre-receive.sample
└── update.sample

For the scripts to be executed, only the suffix .sample must be removed and, if necessary, the file permission must be executable, for example with chmod +x .git/PREPARE-COMMIT-MSG.

The integrated scripts are shell and Perl scripts, but any scripting language can be used. The Shebang line (#!/bin/sh) determines how the file is to be interpreted.

However, the scripts cannot be copied into the server-side repository.