Git pre-receive yaml check

#!/usr/bin/env sh

set -e

RET=0

while read OLD NEW REFNAME ; do
	files=$(git ls-tree -r --name-only $NEW)
	for file in $files ; do
		[[ $file =~ ".yaml" ]] || continue
		contents=$(git show $NEW:$file)
		echo "${contents}" | python -c 'import yaml,sys;yaml.load(sys.stdin.read())' &>/dev/null
		[ $? -eq 0 ] || RET=$?
	done
done

exit $RET