. $(dirname $0)/functions

vertonumber () {
	local VERSIONID=$1
	local V1=$(echo $VERSIONID | cut -d. -f1)
	local V2=$(echo $VERSIONID | cut -d. -f2)
	local V3=$(echo $VERSIONID | cut -d. -f3)
	local V="$V1$V2$V3"
	echo -n $V
}

NEW_VERSION=$(wget -O - --no-verbose -q http://zlib.net/ | grep 'zlib-[0-9].*.tar.xz.asc' | sed 's/.*zlib-\(.*\)\.tar\.xz.asc.*/\1/')
if [ -z "$NEW_VERSION" ]; then
	echo "Can't determine current version, probably the website has been edited."
	echo "Please fix the $0 script."
	exit 1
fi
echo "NEW_VERSION = $NEW_VERSION"

checkout platform/external/zlib

cd $SRC/platform/external/zlib

if git branch -a | grep -q linaro-upstream-$NEW_VERSION; then
	ok "zlib is up to date."
	exit 0
fi

git checkout -b linaro-upstream-work-$TIMESTAMP aosp/master

AOSPVER=$(grep ZLIB_VER_MAJOR zlib.h | cut -d " " -f3).$(grep ZLIB_VER_MINOR zlib.h | cut -d " " -f3).$(grep ZLIB_VER_REVISION zlib.h | cut -d " " -f3)
echo "AOSPVER = $AOSPVER"

if [ "$(vertonumber $NEW_VERSION)" -le "$(vertonumber $AOSPVER)" ]; then
	notice "zlib is up to date in AOSP master, copying its work"
else
	notice "Updating zlib to $NEW_VERSION"

	wget http://zlib.net/zlib-$AOSPVER.tar.gz
	tar -zxf zlib-$AOSPVER.tar.gz
	cd zlib-$AOSPVER
	./configure
	rm Makefile configure.log
	cd ../
	diff -ruN zlib-$AOSPVER src > Android.patch

	wget http://zlib.net/zlib-$NEW_VERSION.tar.xz
	tar -zxf zlib-$NEW_VERSION.tar.xz
	rm -rf src zlib-$AOSPVER zlib-$NEW_VERSION.tar.xz zlib-$AOSPVER.tar.gz
	mv zlib-$NEW_VERSION src
	cd src
	./configure
	rm Makefile configure.log
	cd ../
	grep -A21 'Copyright notice:' src/README | tail -20 > NOTICE

	if patch -p0 < Android.patch; then
		rm Android.patch
		notice "Auto-updated zlib to $NEW_VERSION."
		git commit -asm "Update to zlib $NEW_VERSION"
		git clean -d -f -x
	else
		error "Couldn't auto-update zlib - patch failed to apply."
		error "Please fix manually and commit to a branch called"
		error "linaro-upstream-$NEW_VERSION."
		exut 1
	fi
fi

git push origin linaro-upstream-work-$TIMESTAMP:linaro-upstream-$NEW_VERSION
git pull
git checkout -b linaro-upstream-$NEW_VERSION origin/linaro-upstream-$NEW_VERSION
git branch -D linaro-upstream-work-$TIMESTAMP
pwd