#!/bin/bash

# .git/hooks/pre-receive

SCRIPTPATH=$(dirname $(realpath -s $0))

while read oldrev newrev ref
do
	echo "Ref $ref received. Checking for post-receive hook modification..."
	if [ ! git diff --name-only $1..$2 | grep 'post-receive' ]; then
		echo "Updated post-receive hook detected. Installing..."
		git archive $newrev | tar -x -C /tmp/newrev
		cp /tmp/newrev/post-receive $SCRIPTPATH/post-receive
		rm -rf /tmp/newrev
	fi
done