# Template file for 'linux-asahi'
pkgname=linux-asahi
version=6.13.8+1
revision=1
short_desc="Linux kernel and modules for Apple Silicon"
maintainer="Will Springer <skirmisher@protonmail.com>, dkwo <npiazza@disroot.org>"
license="GPL-2.0-only"
homepage="https://asahilinux.org"
distfiles="https://github.com/AsahiLinux/linux/archive/asahi-${version/+/-}.tar.gz"
checksum=34184affc4e0a714cde07f665683896d7a09deda0db22300ebadc1307ca454e2

python_version=3

archs="aarch64*"

nodebug=yes  # -dbg package is generated below manually
nostrip=yes
noverifyrdeps=yes
noshlibprovides=yes
preserve=yes

hostmakedepends="tar xz bc elfutils-devel flex gmp-devel kmod libmpc-devel
 pkg-config openssl-devel perl uboot-mkimage cpio pahole python3 zstd
 rust rust-bindgen rust-src"

_kernver=${version}-asahi_${revision}
triggers="kernel-hooks"
kernel_hooks_version="${_kernver}"

# These files could be modified when an external module is built.
mutable_files="
 /usr/lib/modules/${_kernver}/modules.builtin.bin
 /usr/lib/modules/${_kernver}/modules.builtin.alias.bin
 /usr/lib/modules/${_kernver}/modules.softdep
 /usr/lib/modules/${_kernver}/modules.dep
 /usr/lib/modules/${_kernver}/modules.dep.bin
 /usr/lib/modules/${_kernver}/modules.symbols
 /usr/lib/modules/${_kernver}/modules.symbols.bin
 /usr/lib/modules/${_kernver}/modules.alias
 /usr/lib/modules/${_kernver}/modules.alias.bin
 /usr/lib/modules/${_kernver}/modules.devname"

# reproducible build
export KBUILD_BUILD_TIMESTAMP=$(LC_ALL=C date -ud @${SOURCE_DATE_EPOCH:-0})
export KBUILD_BUILD_USER=voidlinux
export KBUILD_BUILD_HOST=voidlinux

if [ "$CROSS_BUILD" ]; then
	_cross="CROSS_COMPILE=${XBPS_CROSS_TRIPLET}-"
fi

post_patch() {
	# avoid the strip wrapper, its used to copy the objects to a new location
	# and required to avoid absolute relocations.
	vsed -e "s|\$(STRIP) \(--strip-debug -o \$@ \$<;\)|/usr/bin/${STRIP} \1|" -i drivers/firmware/efi/libstub/Makefile
	# use our own local version
	rm localversion.05-asahi
}

do_configure() {
	# If there's a file called <arch>-dotconfig, use it to
	# configure the kernel; otherwise use arch defaults and all stuff
	# as modules (allmodconfig).
	local arch
	arch=arm64

	if [ -f ${FILESDIR}/${arch}-dotconfig-custom ]; then
		msg_normal "Detected a custom .config file for your arch, using it.\n"
		cp -f ${FILESDIR}/${arch}-dotconfig-custom .config
		make ${makejobs} ARCH=$arch ${_cross} oldconfig
	elif [ -f ${FILESDIR}/${arch}-dotconfig ]; then
		msg_normal "Detected a .config file for your arch, using it.\n"
		cp -f ${FILESDIR}/${arch}-dotconfig .config
		make ${makejobs} ARCH=$arch ${_cross} oldconfig
	fi

	# Always use our revision to CONFIG_LOCALVERSION to match our pkg version.
	sed -i -e "s|^\(CONFIG_LOCALVERSION=\).*|\1\"+${version#*+}-asahi_${revision}\"|" .config
}

do_build() {
	local arch _args
	_args="Image modules dtbs"; arch=arm64

	export LDFLAGS=
	make ARCH=$arch ${_cross} ${makejobs} prepare
	make ARCH=$arch ${_cross} ${makejobs} ${_args}
}

do_install() {
	local arch hdrdest
	arch=arm64

	# Run depmod after compressing modules - makes depmod.sh a noop
	sed -i '2iexit 0' scripts/depmod.sh
	vmkdir usr/lib
	ln -s usr/lib/ ${DESTDIR}

	# Install kernel, firmware and modules
	make ${makejobs} ARCH=${arch} INSTALL_MOD_PATH=${DESTDIR} ${_cross} modules_install

	hdrdest=${DESTDIR}/usr/src/kernel-headers-${_kernver}

	vinstall .config 644 boot config-${_kernver}
	vinstall System.map 644 boot System.map-${_kernver}

	vinstall arch/arm64/boot/Image 644 boot vmlinux-${_kernver}
	make ${makejobs} ARCH=${arch} INSTALL_DTBS_PATH=${DESTDIR}/boot/dtbs/dtbs-${_kernver} ${_cross} dtbs_install

	# Switch to /usr.
	vmkdir usr

	cd ${DESTDIR}/usr/lib/modules/${_kernver}
	rm -f source build
	ln -sf ../../../src/kernel-headers-${_kernver} build

	cd ${wrksrc}
	# Install required headers to build external modules
	install -Dm644 Makefile ${hdrdest}/Makefile
	install -Dm644 Kbuild ${hdrdest}/Kbuild
	install -Dm644 kernel/Makefile ${hdrdest}/kernel/Makefile
	install -Dm644 .config ${hdrdest}/.config
	for file in $(find . -name Kconfig\*); do
		mkdir -p ${hdrdest}/$(dirname $file)
		install -Dm644 $file ${hdrdest}/${file}
	done
	for file in $(find arch/${arch} scripts -name module.lds -o -name Kbuild.platforms -o -name Platform); do
		mkdir -p ${hdrdest}/$(dirname $file)
		install -Dm644 $file ${hdrdest}/${file}
	done
	mkdir -p ${hdrdest}/include
	# Remove firmware stuff provided by the "linux-firmware" pkg.
	rm -rf ${DESTDIR}/usr/lib/firmware

	for i in acpi asm-generic clocksource config crypto drm generated linux vdso \
		math-emu media net pcmcia scsi sound trace uapi video xen dt-bindings; do
		if [ -d include/$i ]; then
			cp -a include/$i ${hdrdest}/include
		fi
	done

	cd ${wrksrc}
	mkdir -p ${hdrdest}/arch/${arch}
	cp -a arch/${arch}/include ${hdrdest}/arch/${arch}

	# needed for mv-debug
	cp scripts/sign-file "${XBPS_WRAPPERDIR}"

	# Remove helper binaries built for host,
	# if generated files from the scripts/ directory need to be included,
	# they need to be copied to ${hdrdest} before this step
	if [ "$CROSS_BUILD" ]; then
		make ${makejobs} ARCH=${arch} ${_cross} _mrproper_scripts
		# remove host specific objects as well
		find scripts -name '*.o' -delete
	fi

	# Copy files necessary for later builds, like nvidia and vmware
	cp Module.symvers ${hdrdest}
	cp -a scripts ${hdrdest}
	mkdir -p ${hdrdest}/security/selinux
	cp -a security/selinux/include ${hdrdest}/security/selinux
	mkdir -p ${hdrdest}/tools/include
	cp -a tools/include/tools ${hdrdest}/tools/include
	if [ -d "arch/${arch}/tools" ]; then
		cp -a "arch/${arch}/tools" "${hdrdest}/arch/${arch}"
	fi
	cp -a kernel/time/timeconst.bc "${hdrdest}/kernel/time"
	cp -a kernel/bounds.c "${hdrdest}/kernel"
	mkdir -p "${hdrdest}/arch/x86/entry/syscalls"
	cp -a arch/x86/entry/syscalls/syscall_32.tbl "${hdrdest}/arch/x86/entry/syscalls"

	mkdir -p ${hdrdest}/arch/${arch}/kernel
	cp arch/${arch}/Makefile ${hdrdest}/arch/${arch}

	mkdir -p ${hdrdest}/arch/arm64/kernel
	cp arch/arm64/kernel/asm-offsets.s ${hdrdest}/arch/arm64/kernel
	cp -a arch/arm64/kernel/vdso ${hdrdest}/arch/arm64/kernel/

	# add headers for lirc package
	# pci
	for i in bt8xx cx88 saa7134; do
		mkdir -p ${hdrdest}/drivers/media/pci/${i}
		cp -a drivers/media/pci/${i}/*.h ${hdrdest}/drivers/media/pci/${i}
	done
	# usb
	for i in em28xx pwc; do
		mkdir -p ${hdrdest}/drivers/media/usb/${i}
		cp -a drivers/media/usb/${i}/*.h ${hdrdest}/drivers/media/usb/${i}
	done
	# i2c
	mkdir -p ${hdrdest}/drivers/media/i2c
	cp drivers/media/i2c/*.h ${hdrdest}/drivers/media/i2c
	for i in cx25840; do
		mkdir -p ${hdrdest}/drivers/media/i2c/${i}
		cp -a drivers/media/i2c/${i}/*.h ${hdrdest}/drivers/media/i2c/${i}
	done

	# Add md headers
	mkdir -p ${hdrdest}/drivers/md
	cp drivers/md/*.h ${hdrdest}/drivers/md

	# Add inotify.h
	mkdir -p ${hdrdest}/include/linux
	cp include/linux/inotify.h ${hdrdest}/include/linux

	# Add wireless headers
	mkdir -p ${hdrdest}/net/mac80211/
	cp net/mac80211/*.h ${hdrdest}/net/mac80211

	# add dvb headers for http://mcentral.de/hg/~mrec/em28xx-new
	mkdir -p ${hdrdest}/drivers/media/dvb-frontends
	cp drivers/media/dvb-frontends/lgdt330x.h \
		${hdrdest}/drivers/media/dvb-frontends/
	cp drivers/media/i2c/msp3400-driver.h ${hdrdest}/drivers/media/i2c/

	# add dvb headers
	mkdir -p ${hdrdest}/drivers/media/usb/dvb-usb
	cp drivers/media/usb/dvb-usb/*.h ${hdrdest}/drivers/media/usb/dvb-usb/
	mkdir -p ${hdrdest}/drivers/media/dvb-frontends
	cp drivers/media/dvb-frontends/*.h ${hdrdest}/drivers/media/dvb-frontends/
	mkdir -p ${hdrdest}/drivers/media/tuners
	cp drivers/media/tuners/*.h ${hdrdest}/drivers/media/tuners/

	# Add xfs and shmem for aufs building
	mkdir -p ${hdrdest}/fs/xfs/libxfs
	mkdir -p ${hdrdest}/mm
	cp fs/xfs/libxfs/xfs_sb.h ${hdrdest}/fs/xfs/libxfs/xfs_sb.h

	# Extract debugging symbols and compress modules
	msg_normal "$pkgver: extracting debug info and compressing modules, please wait...\n"
	install -Dm644 vmlinux ${DESTDIR}/usr/lib/debug/boot/vmlinux-${_kernver}
	(
	cd ${DESTDIR}
	export DESTDIR
	export SIGN_FILE="${XBPS_WRAPPERDIR}/sign-file sha512 ${wrksrc}/certs/signing_key.pem ${wrksrc}/certs/signing_key.x509"
	find ./ -name '*.ko' -print0 | \
		xargs -0r -n1 -P ${XBPS_MAKEJOBS} ${FILESDIR}/mv-debug
	)
	# ... and run depmod again.
	depmod -b ${DESTDIR}/usr -F System.map ${_kernver}
	rm -f ${DESTDIR}/lib
}

linux-asahi-headers_package() {
	preserve=yes
	nostrip=yes
	noshlibprovides=yes
	short_desc+=" - source headers for 3rd party modules"
	pkg_install() {
		vmove usr/src
		vmove usr/lib/modules/${_kernver}/build
	}
}

linux-asahi-dbg_package() {
	preserve=yes
	nostrip=yes
	noverifyrdeps=yes
	noshlibprovides=yes
	repository=debug
	short_desc+=" - debugging symbols"
	pkg_install() {
		vmove usr/lib/debug
		vmove "boot/System.map-${_kernver}"
	}
}