# Description: Linux kernel, sources and modules
# URL:         
# Maintainer:  Emmett1, emmett1 dot 2miligrams at gmail dot com
# Depends on:  elfutils mkinitramfs openssl linux-firmware

name=linux
version=5.17.1
release=1
source=(https://www.kernel.org/pub/linux/kernel/v5.x/linux-$version.tar.xz
        config)

build() {
	cd linux-$version

	make mrproper

	cp $SRC/config ./.config
	make olddefconfig

	sed '/^CONFIG_LOCALVERSION=/d' -i .config
	echo 'CONFIG_LOCALVERSION="-LFS"' >> .config

	kernver=${version}$(grep CONFIG_LOCALVERSION= .config | cut -d '"' -f2)

	#make menuconfig
	make bzImage modules
	make INSTALL_MOD_PATH=$PKG modules_install

	mkdir -p $PKG/boot

	cp  arch/x86/boot/bzImage $PKG/boot/vmlinuz-lfs
	echo $kernver > $PKG/lib/modules/KERNELVERSION

	make clean
	make prepare

	rm -rf $PKG/lib/firmware

	for file in $(ls arch); do
		case $file in
			x86|Kconfig) continue ;;
			*) rm -fr arch/$file ;;
		esac
	done

	# strip down sources
	# don't package the kernel in the sources directory
	find . -name "*Image" -exec rm "{}" \;
	find . -name "*.cmd" -exec rm -f "{}" \; 
	rm -f .*.d

	rm -fr firmware ipc .config.old .version .cocciconfig \
		.get_maintainer.ignore .gitattributes .gitignore .mailmap \
		COPYING CREDITS MAINTAINERS README Documentation
	find . -name ".gitignore" -exec rm "{}" \;
	for dir in block certs crypto drivers fs init kernel lib mm net samples security sound usr virt; do
		find $dir -type f \( -name "*.c" -o -name "*.h" \) -exec rm "{}" \;
	done
	for i in $(ls tools); do
		[ "$i" = "objtool" ] || rm -fr tools/$i
	done
	for i in $(ls tools/objtool); do
		[ "$i" = "objtool" ] || rm -fr tools/objtool/$i
	done

	rm $PKG/lib/modules/$kernver/{build,source}
	mv $SRC/linux-$version $PKG/lib/modules/$kernver/build
	ln -sv build $PKG/lib/modules/$kernver/source

	# remove now broken symlinks
	find -L $PKG/lib/modules/$kernver/build -type l -exec rm -f "{}" \;
}