pre-commit

#!/bin/sh
# Pre-commit hook that crushes PNG files in order to reduce their size.

if ! which -s pngcrush
then
	echo "Please install pngcrush to reduce png images size before commit"
	exit 1;
fi

for file in `git diff --cached --name-only | grep ".png\$"`
do
	echo "Crushing $file"
	pngcrush -rem allb -brute -reduce $file ${file%.png}.new | grep "filesize"
	mv -f ${file%.png}.new $file
done