Aggregating and uglifying javascript in a git pre-commit hook

I'm using ready.js to aggregate JS files into an all.js file (without Google's Closure Compiler), and then using uglify-js to minify and obfuscate the code. I'd like to do all of this in a pre-commit hook.

However, I think I'm doing something wrong.

My .git/hooks/pre-commit file looks like this:

#!/bin/sh
readyjs ~/Sites/backbone/js/javascripts/ ~/Sites/backbone/js/ --nojslint -o "underscore.js, backbone.js" --nocompiler
uglifyjs -nm -o ~/Sites/backbone/js/all.min.js ~/Sites/backbone/js/all.js
# Commit
exit

Should I not be using simple Bash here? Is there something else I'm doing wrong? This step seems to be skipped entirely.

My psychic powers suggest that your script isn't executable; try doing