pre-commit.sh

#!/bin/sh

if git rev-parse --verify HEAD >/dev/null 2>&1
then
	against=HEAD
else
	# Initial commit: diff against an empty tree object
	against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi

# Redirect output to stderr.
exec 1>&2

git diff --cached $against -G 'print\(' --no-color -U0 | grep --quiet '+\s*print'
added_prints=$?
if [ $added_prints -eq 0 ]; then
	echo 'new prints found (use `commit --no-verify` to bypass):\n'
	git diff --cached $against -G 'print\('
	exit 1
fi

# If there are whitespace errors, print the offending file names and fail.
exec git diff-index --check --cached $against --