lint files before allowing git push recieve

pre-recieve

#!/bin/bash

oldrev=$1
newrev=$2
refname=$3

while read oldrev newrev refname; do
	files=`git diff --name-only ${oldrev} ${newrev}`
	objects=`git ls-tree --full-name -r ${newrev}`

	for file in ${files}; do
		object=`echo -e "${objects}" | egrep "\s+${file}\$" | awk '{ print $3 }'`

		if [ -z ${object} ]; then
			continue
		fi

		lint=0

		case "${file}" in
			*.php)
				lint=`git cat-file blob ${object} | php -l -- > /dev/null; echo -n $?`
				;;
			*.json)
				lint=`git cat-file blob ${object} | python -m simplejson.tool > /dev/null; echo -n $?`
				;;
			*)
				continue
				;;
		esac

		if [ ${lint} ]; then
			echo -e "\033[0;93mlint failed for ${file}\033[0m"
			exit 1
		else
			echo "\033[0;37mlint passed for ${file}\033[0m"
		fi
	done
done