Pre-commit hook for catching "FIXME"

pre-commit

#!/bin/sh
#
# Prevent "FIXME" from appearing in diffs

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

# If you want to allow FIXME to appear in diffs
allowfixme=$(git config --bool hooks.allowfixme)

# Redirect output to stderr.
exec 1>&2

if [ "$allowfixme" != "true" ] &&
	test $(git diff --cached --diff-filter=AMCX -z $against |
	  LC_ALL=C grep -i '^+.*fixme' | wc -c) != 0
then
	cat <<\EOF
Error: Commit contains the word "FIXME"

Use 'git diff --cached' to locate

You can disable this check using:

  git config hooks.allowfixme true
EOF
	exit 1
fi