# Maintainer: Milan P. Stanić <mps@arvanta.net>

_flavor=asahi-git
pkgname=linux-${_flavor}
pkgver=6.8.4
#_tag=1
kver=${pkgver//_/-}
_realver=6.8.4-1
_commit_id=5205c460bd73b97b66e6a95711a8f47b920eba7f
pkgdesc="Apple Silicon (M1 development kernel)"
pkgrel=2
url="https://github.com/jannau/linux/tree/beta-6.8/asahi-wip"
depends="initramfs-generator"
_depends_dev="perl gmp-dev elfutils-dev flex bison"
#_rust=1.74.1-r0
_rust=1.77.0-r1
makedepends="$_depends_dev sed bc linux-headers installkernel
	linux-firmware-none openssl-dev diffutils findutils
	cargo=$_rust
	rust=$_rust
	rustfmt=$_rust
	rust-bindgen
	rust-src=$_rust
	"
options="!strip !check"
_config=${config:-config-asahi-git.${CARCH}}

#https://github.com/jannau/linux/commits/beta-6.8/asahi-wip/
#source="linux-asahi-$pkgver-${_commit_id}.tar.gz::https://github.com/AsahiLinux/linux/archive/${_commit_id}.tar.gz
#source="linux-asahi-$pkgver-${_commit_id}.tar.gz::https://github.com/jannau/linux/archive/${_commit_id}.tar.gz
source="linux-asahi-$pkgver.tar.gz::https://github.com/jannau/linux/archive/refs/tags/asahi-6.8.4-1.tar.gz
	config-asahi-git.aarch64

	sensors.patch
	"

builddir="$srcdir/linux-asahi-$_realver"
#builddir="$srcdir/linux-${_commit_id}"
arch="aarch64"
_carch="arm64"
license="GPL-2.0"

_flavors=
for _i in $source; do
	case $_i in
	config-*.$CARCH)
		_f=${_i%.$CARCH}
		_f=${_f#config-}
		_flavors="$_flavors ${_f}"
		if [ "linux-$_f" != "$pkgname" ]; then
			subpackages="$subpackages linux-${_f}::$CBUILD_ARCH linux-${_f}-dev:_dev:$CBUILD_ARCH"
		fi
		;;
	esac
done

_carch=${CARCH}
case "$_carch" in
aarch64*) _carch="arm64" ;;
arm*) _carch="arm" ;;
esac

prepare() {
	local _patch_failed=
  cd $builddir
	case $pkgver in
		*.*.0);;
		*)
		msg "Applying patch-$pkgver.xz"
	#	unxz -c < "$srcdir"/patch-$pkgver.xz | patch -p1 -N ;;
	esac

	# first apply patches in specified order
	for i in $source; do
		case $i in
		*.patch)
			msg "Applying $i..."
			if ! patch -s -p1 -N -i "$srcdir"/$i; then
				echo $i >>failed
				_patch_failed=1
			fi
			;;
		esac
	done

	if ! [ -z "$_patch_failed" ]; then
		error "The following patches failed:"
		cat failed
		return 1
	fi
  # Fix for newer bindgen versions
	sed -i -e s/blacklist/blocklist/ \
		-e s/whitelist/allowlist/ \
				rust/Makefile
  sed -i 's/^#EXTRAVERSION =/EXTRAVERSION =/' "$builddir"/Makefile
  sed -i 's/^EXTRAVERSION :=/#EXTRAVERSION :=/' "$builddir"/Makefile
	# remove localversion from patch if any
	rm -f localversion*
	oldconfig
}

oldconfig() {
	for i in $_flavors; do
		local _config=config-$i.${CARCH}
		local _builddir="$srcdir"/linux-$_commit_id
		mkdir -p "$_builddir"
		echo "-$pkgrel-$i" > "$_builddir"/localversion-alpine \
			|| return 1

		cp "$srcdir"/$_config "$_builddir"/.config
		make -C $builddir \
			O="$builddir" \
			ARCH="$_carch" \
			listnewconfig oldconfig
	done
}

build() {
	unset LDFLAGS
	export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"
	cd $builddir
	make ARCH="$_carch" \
		KBUILD_BUILD_VERSION="$((pkgrel + 1 ))-Alpine"
}

_package() {
	local _buildflavor="$1" _outdir="$2"
	local _abi_release=${kver}-${pkgrel}-${_buildflavor}
	export KBUILD_BUILD_TIMESTAMP="$(date -Ru${SOURCE_DATE_EPOCH:+d @$SOURCE_DATE_EPOCH})"

	cd $builddir
	# modules_install seems to regenerate a defect Modules.symvers on s390x. Work
	# around it by backing it up and restore it after modules_install
	cp Module.symvers Module.symvers.backup

	mkdir -p "$_outdir"/boot "$_outdir"/lib/modules

	local _install
	case "$CARCH" in
		arm*|aarch64) _install="zinstall dtbs_install";;
		*) _install=install;;
	esac

	make -j1 modules_install $_install \
		ARCH="$_carch" \
		INSTALL_MOD_PATH="$_outdir" \
		INSTALL_MOD_STRIP=1 \
		INSTALL_PATH="$_outdir"/boot \
		INSTALL_DTBS_PATH="$_outdir/boot/dtbs-$_buildflavor"

	cp Module.symvers.backup Module.symvers

	rm -f "$_outdir"/lib/modules/${_abi_release}/build \
		"$_outdir"/lib/modules/${_abi_release}/source
	rm -rf "$_outdir"/lib/firmware

	install -D -m644 include/config/kernel.release \
		"$_outdir"/usr/share/kernel/$_buildflavor/kernel.release
	cp "$builddir"/.config $pkgdir/boot/config-$_flavor

}

# main flavor installs in $pkgdir
package() {
	depends="$depends linux-firmware-any"

	_package asahi-git "$pkgdir"
}


sha512sums="
d1b60e1a3343fee42e104deae1c84b690a6782971aae5f91e6579647e70a920893f4703ead5b989ec15f235c1098386e5beae45df73d893ed3901540db181e74  linux-asahi-6.8.4.tar.gz
fd2f0a7932c428cc39d5e6ba6af53e794af6c653a50a9549b88f488d3d9f0ce9f8b22d15c1939cebf9dcde4a7cab7bc8dfd511dba7db216f6ee1a7da7c5ecf26  config-asahi-git.aarch64
49dfcbc7e3d6d01fde548bfa4174e011fbb36ece94853d856e028f768da3ab156f77c01e0642e6d91f5f024f0c97d5de5847bb064e2a033f3237dfc66768049e  sensors.patch
"