#!/bin/sh

patch_wrapper()
{
	cd $(dirname "${LINUX_SRC_DIR}/$1")
	echo "Patching ${LINUX_SRC_DIR}/$1 with ${ALGA_SRC_DIR}/$1.patch"
	patch --forward --unified --reject-file=- --input="${ALGA_SRC_DIR}/$1.patch"
	patch_r=$?
	if test ${patch_r} -ne 0; then
		echo "Something went wrong when applying ${ALGA_SRC_DIR}/$1.patch"
		if test ${patch_r} -eq 1; then
			echo "patch probably already applied, proceeding"
		else
			echo "patch got something really wrong, aborting"
			exit 1
		fi
	fi
}

#=======

if test -z "$1"; then
	echo "Missing the target linux source tree"
	exit 1
fi

LINUX_SRC_DIR=$1
ALGA_SRC_DIR=${PWD}

patch_wrapper drivers/video/Kconfig

cp -R "${ALGA_SRC_DIR}/drivers/gpu/alga" "${LINUX_SRC_DIR}/drivers/gpu/"

patch_wrapper drivers/gpu/Makefile

cp -R "${ALGA_SRC_DIR}/include/alga" "${LINUX_SRC_DIR}/include/"

#=======
#shared headers with userland

patch_wrapper include/uapi/Kbuild

cp -R "${ALGA_SRC_DIR}/include/uapi/alga" "${LINUX_SRC_DIR}/include/uapi/"