# Description:	CRUX live-update script
# URL:		https://github.com/ruxr/CRUX
# Maintainer:	Roman Oreshnikov, r dot oreshnikov at gmail dot com
# Depends on:	coreutils dash openssh pkgutils sed shadow sysvinit wget

name=live
version=3.7
release=1
source=(live.sh)

build() {
	# Create file list
	A= N=$(	# coreutils
		echo /bin/{mkdir,ln,rm,sleep} /usr/bin/chroot
		# dash
		echo /bin/dash
		# glibc
		echo /sbin/ldconfig
		sed '/^glibc$/,/^$/{/lib\//!d;/\/$/d;/\/audit/d;/\/gconv/d
			/\/getconf/d;/libBrokenLocale/d;/libcidn/d;/libmvec/d
			/libpcprofile/d;/libthread_db/d;/nss_compat/d;/nss_db/d
			/nss_hesiod/d;/nss_nis/d;s%^%/%p};d' /var/lib/pkg/db
		# linux-pam
		echo /lib/security/pam_unix.so
		# ncurses
		echo /usr/share/terminfo/{l/linux,v/vt100,x/xterm}
		# openssh
		echo /etc/ssh/{moduli,sshd_config} /usr/sbin/sshd
		# pkguse
		[ ! -x /usr/sbin/pkguse ] || echo /usr/sbin/pkguse
		# pkgutils
		echo /usr/bin/{pkgadd,pkginfo,pkgrm}
		# sed
		echo /bin/sed
		# shadow
		echo /bin/login /usr/bin/su
		# sysvinit
		echo /sbin/{init,killall5,poweroff,reboot,shutdown}
		# tar
		echo /bin/tar
		# util-linux
		echo /bin/{mount,umount} /sbin/agetty
		# wget
		echo /usr/bin/wget
		# xz
		echo /usr/bin/xz
	)
	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 >live.use

	# Create file tree
	mkdir rootfs
	cd rootfs
	install -d dev mnt proc run sys usr/lib var/{cache,empty,lib,log,run}
	install -dm 1777 tmp var/{lock,tmp}
	ln -s lib lib64
	ln -s lib usr/lib64
	tar -cf - -T ../live.use | tar -xf -
	ln -s /proc/mounts etc/mtab
	mv bin/dash bin/sh
	ldconfig -r $SRC/rootfs

	# Create files
	cat <<-END >bin/setup-chroot
		#!/bin/sh
		mount --bind /proc /mnt/proc
		mount --bind /sys /mnt/sys
		mount --rbind /dev /mnt/dev
		mount --bind /run /mnt/run
		mount --bind /tmp /mnt/tmp
		chroot /mnt /bin/sh
	END
	touch etc/fstab
	cat <<-END >etc/inittab
		id:2:initdefault:
		rc::sysinit:/etc/rc
		rs:S1:wait:/etc/rc.single
		rd:06:wait:/etc/rc.shutdown
		ca::ctrlaltdel:/sbin/shutdown -t3 -r now
		c1:2:respawn:/sbin/agetty --noclear 38400 tty1 linux
		c2:2:respawn:/sbin/agetty 38400 tty2 linux
	END
	mkdir etc/pam.d
	cat <<-END >etc/pam.d/login
		auth		required	pam_unix.so nullok
		account		required	pam_unix.so
		password	required	pam_unix.so
		session		required	pam_unix.so
	END
	ln etc/pam.d/login etc/pam.d/su
	ln etc/pam.d/login etc/pam.d/sshd
	echo export PATH=/bin:/usr/bin:/sbin:/usr/sbin >etc/profile
	echo "#!/bin/sh" >etc/rc
	cat <<-END >etc/rc.shutdown
		#!/bin/sh
		echo The system is coming down. Please wait
		/sbin/killall5 -15
		/bin/sleep 5
		/sbin/killall5 -9
		/bin/umount -a -r
		[ "\$RUNLEVEL" = 0 ] && /sbin/poweroff -d -f -i || /sbin/reboot -d -f -i
	END
	cat <<-END >etc/rc.single
		#!/bin/sh
		/sbin/killall5 -15
		/bin/sleep 5
		/sbin/killall5 -9
		/bin/umount -l -R /mnt/tmp /mnt/dev /mnt/run /mnt/sys /mnt/proc
		/usr/sbin/sshd
	END
	echo /bin/sh >etc/shells
	chmod 555 bin/setup-chroot etc/rc{,.shutdown,.single}

	# Create a self-extracting archive
	{ cat $SRC/live.sh; tar -cJf - *; } >../CRUX-$version-live.run
	mv ../CRUX-$version-live.run $PKGMK_PACKAGE_DIR

	mkdir $PKG/boot
}