On Friday, 19 September 2014 07:16:50 UTC+2, vineet naik wrote:
> Hi, 
> We use a commit-msg hook to add ChangeId (for gerrit) in each commit
> msg. Now I want to ensure that it's also added in merge and squash
> commits created as a result of `git subtree ... --squash`. So I tried
> using `prepare-commit-msg` hook but it doesn't seem to get called at
> the time of merging subtree commits with the --squash option.  What is
> the right way to do this?
> Thanks,
> Vineet
First make sure the file's name is correct (it should be exactly 
*prepare-commit-msg*) and that it has execute permissions: simplest errors 
are the most frequent ones. Then try returning a non-zero exit code at the 
beginning of the hook:

# Interrupt
exit 1

If it interrupts the merge, then it means the hook is correctly running and 
the problem lies in the hook's instructions; if it doesn't then the problem 
lies elsewhere.

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