# Reference: <https://postmarketos.org/vendorkernel>
# Kernel config based on: arch/arm64/configs/montana_defconfig

pkgname="linux-motorola-montana"
pkgver=3.18.140
pkgrel=0
pkgdesc="Motorola Moto G5s kernel fork"
arch="aarch64"
_carch="arm64"
_flavor="motorola-montana"
url="https://kernel.org"
license="GPL-2.0-only"
options="!strip !check !tracedeps"
makedepends="perl sed installkernel bash gmp-dev bc linux-headers elfutils-dev devicepkg-dev dtbtool xz"

# Compiler: latest GCC from Alpine
HOSTCC="${CC:-gcc}"
HOSTCC="${HOSTCC#${CROSS_COMPILE}}"

# Source
_repository="android_kernel_motorola_msm8937"
_commit="1e8993177823e4ddf3b5d91da6335d75ad513dec"
_config="config-${_flavor}.${arch}"
source="
	$pkgname-$_commit.tar.gz::https://github.com/MontanaDevelopment/${_repository}/archive/${_commit}.tar.gz 
	$_config
"
builddir="$srcdir/${_repository}-${_commit}"

prepare() {
	default_prepare
	downstreamkernel_prepare "$srcdir" "$builddir" "$_config" "$_carch" "$HOSTCC"
}

build() {
	unset LDFLAGS
	make ARCH="$_carch" CC="${CC:-gcc}" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-postmarketOS"

	# Generate master DTB (deviceinfo_bootimg_qcdt)
	dtbTool -s 2048 -p "scripts/dtc/" -o "arch/arm/boot/dt.img" "arch/arm/boot/"
}

package() {
	# kernel.release
	install -D "$builddir/include/config/kernel.release" \
		"$pkgdir/usr/share/kernel/$_flavor/kernel.release"

	# zImage (find the right one)
	cd "$builddir/arch/$_carch/boot"
	_target="$pkgdir/boot/vmlinuz-$_flavor"
	for _zimg in zImage-dtb Image.gz-dtb *zImage Image.gz Image; do
		[ -e "$_zimg" ] || continue
		msg "zImage found: $_zimg"
		install -Dm644 "$_zimg" "$_target"
		break
	done
	if ! [ -e "$_target" ]; then
		error "Could not find zImage in $PWD!"
		return 1
	fi

	# Master DTB (deviceinfo_bootimg_qcdt)
	install -Dm644 "$builddir/arch/arm/boot/dt.img" \
		"$pkgdir/boot/dt.img"
}

sha512sums="369dfffb8088958226b1a259705f4af1e5e9b02d32fde4cd9f9c50f2165658a187f5aa74badff77761a02c2c088484789267db6afbcc3e802dd62b1e819553c0  linux-motorola-montana-1e8993177823e4ddf3b5d91da6335d75ad513dec.tar.gz
3d05f43f3c3ca5afc5bc46aeb7b08ffda78ca6b146bf9d8969c14da3b62ae9fa83dab85cac291aadf9ee4d182e98d6d56f8da9324681a6b697e22456c9fbbee5  config-motorola-montana.aarch64"