# Description:	CRUX Linux kernel
# URL:		https://github.com/ruxr/CRUX
# Maintainer:	Roman Oreshnikov, r dot oreshnikov at gmail dot com
# Depends on:	coreutils dash eudev file kmod sed util-linux
# Post-install:	yes

name=core
version=3.7
release=1
REL=$(uname -r)
DIR=/usr/src/linux-$REL
source=(core.sh init firmware
	https://cdn.kernel.org/pub/linux/kernel/v${REL%%.*}.x/linux-$REL.tar.xz)

unpack_source() {
	for F in ${source[@]}; do
		case $F in
		*/*)	[ -d $DIR ] && continue || rm -rf /usr/src/linux-*
			mkdir -p /usr/src
			bsdtar -C /usr/src -opxf $PKGMK_SOURCE_DIR/${F##*/};;
		*) [ ! -f $F ] || cp $F $SRC
		esac
	done
}
build() {
	# Create file list for initrd
	A= N=$(	# coreutils
		echo /bin/{readlink,sleep}
		# dash
		echo /bin/dash
		# eudev
		echo /sbin/{udevadm,udevd}
		sed '/^eudev$/,/^$/{/\/udev\//!d;/\/$/d;/conf$/d;s%^%/%p};d' \
			/var/lib/pkg/db
		# kmod
		echo /sbin/*mod*
		# sed
		echo /bin/sed
		# util-linux
		echo /bin/{mount,umount} /sbin/switch_root
	)
	while [ -n "$N" ]; do
		set -- $N; N=
		for F do
			case " $A " in
			*\ $F\ *);;
			*) echo $F; A=$A\ $F N=$N\ $(case $(file -b $F) in
				*ELF*) ldd $F | sed '/\//!d;s%^[^/]*%%;s/ .*//
					s%/\./%/%g;s%[^/]*/\.\./%%g
					s%/lib64/%/lib/%';;
				symbolic*) readlink -f $F
				esac)
			esac
		done
	done >initrd.use

	# Create file tree for initrd
	mkdir -p core/{dev,mnt,proc,run,sys}
	cd core
	tar -cf - -T ../initrd.use | tar -xf -
	# Opimize eudev files
	sed -i '/^#/d;/^$/d;s/\(GROUP=\)"[^"]*"/\1"0"/' */udev/*.d/*
	mv bin/dash bin/sh
	install ../init .
	ldconfig -r $SRC/core

	ModFw() {
		make -C $DIR INSTALL_MOD_PATH=$(pwd -P) modules_install
		[ -f $1 ] || return 0
		while read S; do
			case $S in
				/lib/firmware/*) install -Dm444 "$S" ."$S"
			esac
		done <$1
	}

	for C in /usr/ports/CRUX/*.config /boot/config; do
		[ -f "$C" ] || continue
		cp $C $DIR/.config
		if [ "$C" = /boot/config ]; then
			C= F=$SRC/firmware R=$SRC/post-install
		else
			F=${C%.config} R=$SRC/CRUX-$version-${F##*/}-kernel.run
			F=$F.firmware
		fi

		# Build kernel
		make -C $DIR olddefconfig
		make -C $DIR all

		# Create initrd
		rm -rf lib/{modules,firmware} boot
		ModFw $F
		rm lib/modules/$REL/{build,source}
		find . | sort | cpio -o -H newc | gzip -9 >../initrd-$REL

		# Create a self-extracting archive
		mkdir -p boot/boot
		cd boot
		mv $SRC/initrd-$REL boot
		cp $DIR/.config boot/config-$REL
		cp $DIR/System.map boot/System.map-$REL
		cp $DIR/arch/x86/boot/bzImage boot/vmlinuz-$REL
		ModFw $F
		{ sed "s/#REL#/$REL/g" $SRC/core.sh; tar -cJf - *; } >$R
		cd ..

		if [ -n "$C" ]; then
			cp $DIR/.config $C
			mv $R $PKGMK_PACKAGE_DIR
		fi
	done

	mkdir $PKG/boot
}