#!/bin/sh

if [ "$1" = "-q" ] ; then
	quiet=1
	shift
fi

PATCH=${PATCH:-patch}

patchdir=${1:?You must supply a patches directory}
sourcedir=${2?:You must supply a source directory}

if [ ! -d "$patchdir" ] ; then
	echo "$patchdir is not a directory" >&2
	exit 1
fi

if [ ! -d "$sourcedir" ] ; then
	echo "$sourcedir is not a directory"  >&2
	exit 1
fi

if [ ! "$(ls -A $patchdir/*.patch 2>/dev/null)" ] ; then
	echo "No patches in $patchdir"  >&2
	exit 0
fi

for patchfile in "$patchdir"/*.patch ; do
	[ -z $quiet ] && echo "Applying patch $(basename $patchfile)"
	${PATCH} -d "$sourcedir" -p1 -s -i "$patchfile" || exit 1
done

exit 0