How to automatically invoke a script before a git add?

git hook gitattributes
Labynocle picture Labynocle · Sep 18, 2013 · Viewed 10.2k times · Source

Here's my use case: I commit PNGs and other stuff in my Git repo. I would like to apply a specific process to every PNGs I would like to commit and this is the result of the process I finally want to commit (the potential modified PNG).

At the beginning I thought about a hook (like a pre-commit) but it's a little weird because the process will change the file so I will need to re-add it! And according to what I read, there is no pre-add hook (or something like that).

May be a solution is to create a git alias ? But I don't want to change - too much - the way people work, I'm searching for a smooth and transparent way.

If you have a clue... even if the clue is to change my process idea.

Answer

Philip Oakley picture Philip Oakley · Sep 18, 2013

You may want to consider a smudge & clean filter, with the clean being applied during the git add, and the smudge during checkout. These can be allocated by file type. Look at the 'git attributes(5)' man page and Git SCM book : Git Attributes.

Related questions

How to configure Git post commit hook

How to trigger a build remotely from Jenkins? How to configure Git post commit hook? My requirement is whenever changes are made in the Git repository for a particular project it will automatically start Jenkins build for that project. In …

Read More
Putting git hooks into repository

Is it considered to be a bad practice - to put .git/hooks into the projects repository (using symlinks, for example). If yes, what is the best way to deliver same hooks to different git users?

Read More
Applying a git post-commit hook to all current and future repos

I've written a Git post-commit hook and it works correctly. However, I want to add this hook to apply to all current (and future) git repositories I am working on. I tried adding the hook to my ~/.git/hooks/ instead …

Read More