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The awesomeness of git hooks

Oct/10/2013 3 min read by Marco Monteiro

Automation is probably the word we developers love the most. We're lazy, that's why there's so many Wordpress and Joomla websites. Oh wait I was talking about developers. Those are something different (let's leave it at that).

So we version our code, and we obviously use git. BUt what if you wanted something to happen every-time we do make an action.

Well git-hooks got you covered.

The current definition of git hooks:

Hooks are little scripts you can place in $GIT_DIR/hooks directory to trigger action at certain points. When git init is run, a handful of example hooks are copied into the hooks directory of the new repository, but by default they are all disabled. To enable a hook, rename it by removing its .sample suffix.

Note: It is also a requirement for a given hook to be executable. However - in a freshly initialized repository - the .sample files are executable by default.

I'm not going to mention all the "actions" you can use with git-hooks. You can RTFM for that.

However, I can give you a real life example.

Imagine you're using less with javascript:

<link rel="stylesheet/less" type="text/css" href="css/styles.less" />
<script src="js/lib/less-1.1.3.min.js" type="text/javascript"></script>

But now you want that to compiled every time you done editing and commit/push to your development server and the git post-recieve hook runs your build.sh and builds your css adn all that malarkey.

Post-receive

This hook is invoked by git-receive-pack on the remote repository, which happens when a git push is done on a local repository. It executes on the remote repository once after all the refs have been updated.

This hook executes once for the receive operation. It takes no arguments, but gets the same information as the pre-receive hook does on its standard input.

This hook does not affect the outcome of git-receive-pack, as it is called after the real work is done.

RTFM

Net-Tuts tutorial on git-hooks

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"The awesomeness of git hooks" via @marcogmonteiro