simple example for git hooks

[Gelonida <gelonida@gmail.com>]

Does anyone have a simple example of a git pre-commit hook


I have difficulties finding understandable tutorals about git hooks.




What I am looking at is basic examples about


precommit hooks
================

- how get the commit comment and check it's contents
- how to get list of modified files

The issue I'm currently blocked with is rather simple.

I'd like to get a list aof all
new or modified file names, such, that I can check, that for  example
all .h files contain a project specific header.


As soon as I have the file names I should be able to proceed.


How could I do this best from a shell script.





Is there any clear documentation about hich git commands I'm allowed to
use during a trigger script and which ones I can't



Lateron I would be interested to implement a small server script, that
refuses a git push in case, that the most recent commit in a branch
would contain .h files without a certain header text




thanks for your help