VERSION="1.20180817-1"
SRCDIR="linux-raspberrypi-kernel_${VERSION}"
TARBALL="raspberrypi-kernel_${VERSION}.tar.gz"
URL="https://github.com/raspberrypi/linux/archive"
SHA256SUM="9d6bf64710c9604a5eafc0dbd1afb3924ea9cfc122998e1db3287846120cc7d8"
DEPENDS="initrd"

prepare() {
	return
}

build() {
	local INITRDLIST="$PKGDEPLOYDIR/initrd/initrd.list"

	export KBUILD_OUTPUT="$PKGBUILDDIR"
	make -C "$1" O="$PKGBUILDDIR" ARCH="arm" CROSS_COMPILE="${TARGET}-" mrproper

	cat_file_override "linux.config" > "$PKGBUILDDIR/.config"
	sed -i "$PKGBUILDDIR/.config" -e 's,^CONFIG_CROSS_COMPILE=.*,CONFIG_CROSS_COMPILE="'$TARGET'-",'
	sed -i "$PKGBUILDDIR/.config" -e 's,^CONFIG_INITRAMFS_SOURCE=.*,CONFIG_INITRAMFS_SOURCE="'$INITRDLIST'",'
	make -C "$1" O="$PKGBUILDDIR" ARCH="arm" CROSS_COMPILE="${TARGET}-" oldconfig

	sed -i "$PKGBUILDDIR/.config" -e 's,^CONFIG_CROSS_COMPILE=.*,CONFIG_CROSS_COMPILE="'$TARGET'-",'
	sed -i "$PKGBUILDDIR/.config" -e 's,^CONFIG_INITRAMFS_SOURCE=.*,CONFIG_INITRAMFS_SOURCE="'$INITRDLIST'",'
	sed -i "$PKGBUILDDIR/.config" -e 's,^CONFIG_LOCALVERSION=.*,CONFIG_LOCALVERSION="-'${OS_NAME}-${OS_RELEASE}'",'
	make -C "$1" O="$PKGBUILDDIR" ARCH="arm" CROSS_COMPILE="${TARGET}-" -j $NUMJOBS zImage dtbs modules
}

deploy() {
	local SOURCE="$1"
	local DEPLOY="$2"

	mkdir -p "$DEPLOY/boot" "$DEPLOY/lib/modules"
	cp "arch/arm/boot/zImage" "$DEPLOY/boot/vmlinuz"

	export KBUILD_OUTPUT="$PKGBUILDDIR"
	make -C "$SOURCE" O="$PKGBUILDDIR" ARCH="$LINUX_CPU" CROSS_COMPILE="${TARGET}-" INSTALL_MOD_PATH="$DEPLOY" modules_install

	echo "boot/vmlinuz m 555 0 0" > "$DEPLOY/rootfs_files.txt"

	find "$DEPLOY/lib" -exec stat {} --printf="%n m %a 0 0\\n" \; | \
		sed "s#^$DEPLOY/##g" | sed "s/644/444/g" | \
		sed "s/755/555/g" >> "$DEPLOY/rootfs_files.txt"
}

check_update() {
	local version=$(echo $VERSION | sed 's/-/./g')

	curl --silent -L "https://github.com/raspberrypi/linux/releases" | \
	    grep -o "raspberrypi-kernel_[0-9.]*-[0-9]" | \
	    sed 's/raspberrypi-kernel_//g' | sed 's/-/./g' | \
	    verson_find_greatest "$version"
}