Git pre-commit hook for launching a test suite

pre-commit

#!/bin/sh

# Clean the working tree if needed
before="$(git rev-parse --verify --quiet refs/stash)"
git stash save --keep-index --include-untracked --quiet 'Git pre-commit hook'
after="$(git rev-parse --verify --quiet refs/stash)"

# Run tests
grunt jshint
status=$?

# Restore the working tree if needed
if [ "$after" != "$before" ]
then
	git reset --hard --quiet
	git stash pop --index --quiet
fi

# Exit with the relevant status
exit $status