Post Commit Hook Not Running

Try putting some echo lines before and after the perl line like this:

echo "post-commit started"
perl ...........
echo "post-commit finished"

This way you can confirm if the script is actually running, because when you run

git commit

you should see

post-commit started
post-commit finished

Towards the end of your output.

I'll leave this here as an answer because I stumbled upon my own answer for when my post-commit hook wasn't running:

chmod +x .git/hooks/post-commit

Probably applies to any kind of hook. In fact, probably applies to any kind of script.