#!/bin/sh

lfs_dirs() {
	mkdir -pv $LFS/bin $LFS/usr/lib $LFS/usr/bin $LFS/etc || true
	for i in bash cat chmod dd echo ln mkdir pwd rm stty touch; do
		ln -svf /tools/bin/$i $LFS/bin
	done
	for i in env install perl printf; do
		ln -svf /tools/bin/$i $LFS/usr/bin
	done
	ln -svf /tools/lib/libgcc_s.so /tools/lib/libgcc_s.so.1 $LFS/usr/lib
	ln -svf /tools/lib/libstdc++.a /tools/lib/libstdc++.so /tools/lib/libstdc++.so.6 $LFS/usr/lib
	ln -svf bash $LFS/bin/sh
	ln -svf /proc/self/mounts $LFS/etc/mtab

cat > $LFS/etc/passwd << "EOF"
root:x:0:0:root:/root:/bin/bash
EOF

cat > $LFS/etc/group << "EOF"
root:x:0:
bin:x:1:daemon
sys:x:2:
kmem:x:3:
tape:x:4:
tty:x:5:
daemon:x:6:
floppy:x:7:
disk:x:8:
lp:x:9:
dialout:x:10:
audio:x:11:
video:x:12:
utmp:x:13:
usb:x:14:
cdrom:x:15:
adm:x:16:
messagebus:x:18:
input:x:24:
mail:x:34:
kvm:x:61:
wheel:x:97:
nogroup:x:99:
users:x:999:
EOF

	# pkgutils
	mkdir -p \
		$LFS/var/lib/pkg/pkg \
		$LFS/var/lib/pkg/src \
		$LFS/var/lib/pkg/work
	touch $LFS/var/lib/pkg/db
}

mount_pseudo() {
	mkdir -p $LFS/dev $LFS/run $LFS/proc $LFS/sys
	mount --bind /dev $LFS/dev
	mount -t devpts devpts $LFS/dev/pts -o gid=5,mode=620
	mount -t proc proc $LFS/proc
	mount -t sysfs sysfs $LFS/sys
	mount -t tmpfs tmpfs $LFS/run
	if [ -h $LFS/dev/shm ]; then
	  mkdir -p $LFS/$(readlink $LFS/dev/shm)
	fi
}

umount_pseudo() {
	unmount $LFS/dev/pts
	unmount $LFS/dev
	unmount $LFS/run
	unmount $LFS/proc
	unmount $LFS/sys
}

mountbind_srcpkg() {
	mount --bind $SRCDIR $LFS/var/lib/pkg/src
	mount --bind $PKGDIR $LFS/var/lib/pkg/pkg
}

unmountbind_srcpkg() {
	unmount $LFS/var/lib/pkg/src
	unmount $LFS/var/lib/pkg/pkg
}

unmount() {
	while true; do
		mountpoint -q $1 || break
		umount $1 2>/dev/null
	done
}

runinchroot() {
	cd $LFS >/dev/null 2>&1
	mount_pseudo
	mountbind_srcpkg
	cp -L /etc/resolv.conf $LFS/etc/
	chroot "$LFS" $ENVLFS -i \
	    HOME=/root                  \
	    TERM="$TERM"                \
	    PS1='(lfs chroot) \u:\w\$ ' \
	    PATH=/bin:/usr/bin:/sbin:/usr/sbin:/tools/bin $@
	retval=$?
	unmountbind_srcpkg
	umount_pseudo
	cd - >/dev/null 2>&1
	return $retval
}

interrupted() {
	die "script $(basename $0) aborted!"
}

die() {
	[ "$@" ] && printerror $@
	unmountbind_srcpkg
	umount_pseudo
	exit 1
}

printerror() {
	echo "ERROR: $@"
}

trap "interrupted" 1 2 3 15

if [ $(id -u) != 0 ]; then
	echo "$0 script need to run as root!"
	exit 1
fi

CWD=$PWD

if [ -f $CWD/config ]; then
	. $CWD/config
fi

MAKEFLAGS="${MAKEFLAGS:--j$(nproc)}"
LFS="${LFS:-$CWD/lfs-rootfs}"
PKGDIR="${PKGDIR:-$CWD/pkg}"
SRCDIR="${SRCDIR:-$CWD/src}"
WORKDIR="${WORKDIR:-$CWD/work}"
CFLAGS="${CFLAGS:--O2 -march=x86-64 -pipe}"

mkdir -p $PKGDIR $SRCDIR $WORKDIR

if [ -x $LFS/usr/bin/env ]; then
	ENVLFS=/usr/bin/env
else
	ENVLFS=/tools/bin/env
fi

PKGS="filesystem linux-api-headers man-pages glibc tzdata zlib bzip2 file readline m4 bc binutils gmp mpfr mpc attr acl shadow gcc
	pkgconf ncurses libcap sed psmisc iana-etc bison flex grep bash libtool gdbm gperf expat inetutils
	perl perl-xml-parser intltool autoconf automake xz kmod gettext openssl ca-certificates curl elfutils libffi python3 coreutils
	diffutils gawk findutils groff fuse2 grub less gzip iproute2 kbd libpipeline make patch man-db tar texinfo vim procps-ng
	util-linux e2fsprogs sysklogd sysvinit eudev lfs-bootscripts linux-firmware libarchive mkinitramfs linux libtasn1 p11-kit
	wget pkgutils libnl dbus libxml2 dhcpcd wpa_supplicant lzo lz4 squashfs-tools popt efivar pciutils efibootmgr libpng which freetype2 dosfstools grub-efi
	ports httpup gpm libevent links mtools syslinux"

if [ ! -f $LFS/var/lib/pkg/db ]; then
	lfs_dirs
fi

rm -fr $LFS/usr/ports
mkdir -p $LFS/usr/ports/
echo "==> Copying ports"
cp -Ra ports/* $LFS/usr/ports/

for pkg in $PKGS; do
	case $pkg in
		filesystem|gcc|bash|perl|coreutils) runinchroot pkgin -i -ic $pkg || die;;
		*) runinchroot pkgin -i $pkg || die;;
	esac
done

exit 0