git tracking one file changes

Question

We have a large repo and a lots of commiters.

I want to track history of a single file. Whenever someone changes it (push changes to my central repository), I get the email with diff and author name.

I know that making a pre-commit hook, to do so would resolve a problem for me, however I would have to propagate the script to all commiters.

Is there a pre-merge (or post-merge) hook?

Temporary solution would be a cron task checking every 10 min, who changes the file.

Answer 1

Yes, there is a post-merge hook. Based on your description, however, you probably want to use the post-receive hook on your "central" repository. The Pro-Git hooks page describes it quite well.