# Reference: <https://postmarketos.org/vendorkernel>
# Kernel config based on: arch/arm64/configs/librem5-devkit_defconfig

pkgname="linux-purism-librem5"
pkgver=5.3
pkgrel=0
pkgdesc="Purism Librem 5 phone kernel fork"
arch="aarch64"
_carch="arm64"
_flavor="purism-librem5"
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 bison flex openssl-dev"

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

# Source
_repository="linux-next"
# imx8-current-librem5 branch:
_commit="943e968dc344b7a5535f299b12b462aaecb60a75"
_config="config-$_flavor.$arch"
source="
	$pkgname-$_commit.tar.gz::https://source.puri.sm/Librem5/$_repository/-/archive/$_commit.tar.gz
	$_config
"
builddir="$srcdir/$_repository-$_commit"

prepare() {
	default_prepare
	REPLACE_GCCH=0 \
		downstreamkernel_prepare "$srcdir" "$builddir" "$_config" "$_carch" "$HOSTCC"
}

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

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; do
		[ -e "$_zimg" ] || continue
		msg "zImage found: $_zimg"
		install -Dm644 "$_zimg" "$_target"
		break
	done
	if ! [ -e "$_target" ]; then
		error "Could not find zImage in $PWD!"
		return 1
	fi
	cd "$builddir"
	local _install
	case "$CARCH" in
	aarch64*|arm*)	_install="modules_install dtbs_install" ;;
	*)		_install="modules_install" ;;
	esac

	make -j1 $_install \
		ARCH="$_carch" \
		INSTALL_MOD_PATH="$pkgdir" \
		INSTALL_DTBS_PATH="$pkgdir/usr/share/dtb"

}

sha512sums="895ace8d703c7c2123086a2958eabfb64ebbe19a21a2b7f4d669635f0c8e49148125555681754e949a26c940f4ff8d0ce0efea451cebd7dc6d224bdeba24d936  linux-purism-librem5-943e968dc344b7a5535f299b12b462aaecb60a75.tar.gz
3d17eb02738bc364e3ff892581eca3528ed10949dd7ad43530735256abaef6af76309508292443d79c0651bbbf24508c01c38296ea189931a849f161bac308f7  config-purism-librem5.aarch64"