#!/bin/sh

set -e

. ./config-DEFAULTS || exit 1
. ./config-HOST || exit 1
. ./config-TARGET || exit 1
. ./config-MANDATED || exit 1
. ./functions || exit 1

mkdir "$targettemp"
case "$debootstrap" in
    debootstrap)
	debootstrap \
		--include=$debootstrap_includes \
		--exclude=$debootstrap_excludes \
		"$suite" "$targettemp" "$aptsource_base_host"
	;;
    cdebootstrap)
	cdebootstrap \
		--flavour=minimal \
		"$suite" "$targettemp" "$aptsource_base_cdebootstrap"
	;;
    *)
	echo "ERROR: unknown debootstrap binary defined: \"$debootstrap\""  >&2
	exit 1
esac

# Tweak configuration files
preserveandaddlines "$targettemp/etc/fstab" orig 2 "$rootdev_target\t/\t$ROOTFS\tro\t0\t1" "none\t/proc\tproc\tdefaults\t0\t0"
mkdir -p "$targettemp/etc/network/"
preserveandaddlines "$targettemp/etc/network/interfaces" orig 3 "auto lo"
preserveandaddlines "$targettemp/etc/network/interfaces" orig 2 "iface lo inet loopback"
if [ -n "$DHCPCLIENT" ]; then
	preserveandaddlines "$targettemp/etc/network/interfaces" orig 3 "auto eth0"
	preserveandaddlines "$targettemp/etc/network/interfaces" orig 2 "iface eth0 inet dhcp"
# TODO: Write function to apply multiline entry for static ip
#elif [ -n "$hostdefaultip" ]; then
#	enableoraddlines "$targettemp/etc/network/interfaces" 2 "iface eth0 inet static"
fi
preserveandaddlines "$targettemp/etc/hosts" orig 1 "127.0.0.1 localhost"
if [ -n "$hostdefaultip" ]; then
	preserveandaddlines "$targettemp/etc/hosts" orig 1 "$hostdefaultip $hostname.$domainname $hostname"
fi
if [ -n "$hostname" ] && [ -n "$domainname" ]; then
	preserveandaddlines "$targettemp/etc/hostname" orig 1 "$hostname.$domainname"
fi
if [ ! -d "$targettemp/etc/resolv.conf" ]; then
	if [ -n "$dns_server" ]; then
		preserveandaddlines "$targettemp/etc/resolv.conf" orig 2 "nameserver $dns_server"
	fi
	if [ -n "$domainname" ]; then
		preserveandaddlines "$targettemp/etc/resolv.conf" orig 2 "search $domainname"
	fi
fi
for aptsource in $aptsources; do
	eval uri=\"'$'aptsource_${aptsource}_host\"
	eval components=\"'$'aptsource_${aptsource}_components\"
	preserveandaddlines "$targettemp/etc/apt/sources.list" orig 2 "deb $uri $suite ${components:-main}"
done
if [ -n "$pubdev_target" ] && [ -n "$pubfs" ]; then
	mkdir -p "$targettemp/pub"
	preserveandaddlines "$targettemp/etc/fstab" orig 2 "$pubdev_target\t/pub\t$pubfs\tdefaults,noauto,ro\t0\t0"
fi
rm -rf "$targettemp/var/log/ksymoops"
ln -f -s /proc/mounts "$targettemp/etc/mtab"
preserveandaddlines "$targettemp/etc/modules" orig 1 $modules_load
if [ -n "$loghost" ]; then
	preserveolderfile "$targettemp/etc/syslog.conf" orig
	echo "*.* @$loghost" > "$targettemp/etc/syslog.conf"
fi

# Install/remove additional packages
export DEBIAN_FRONTEND="noninteractive"
case "$debootstrap" in
    debootstrap)
	;;
    cdebootstrap)
	./chroot.sh temp apt-get update
	./chroot.sh temp apt-get -y --allow-unauthenticated install aptitude
	./chroot.sh temp aptitude -y purge cdebootstrap-helper-diverts
	# Hmm - this next one seems like a bug!
	rm -rf "$targettemp/var/cache/debootstrap"
	;;
esac
mkdir -p "$targettemp/etc/apt/apt.conf.d"
echo 'Aptitude::CmdLine::Ignore-Trust-Violations "yes";' > "$targettemp/etc/apt/apt.conf.d/99localforcedautoinstall"
./chroot.sh temp aptitude update
# Next command should *not* cause any packages to get uninstalled, so
# questions asked is an error and shouldn't be suppressed
./chroot.sh temp aptitude markauto '~i!~M(~E|~prequired|~sdevel|~sinterpreters|~slibdevel|~slibs|~soldlibs|~sperl|~spython|~sshells)'
./chroot.sh temp aptitude install -y --without-recommends debconf-english policyrcd-script-zg2
cp -af tweaks/usr/local/sbin/policy-rc.d "$targettemp/usr/local/sbin/"
./chroot.sh temp aptitude install -y --without-recommends $aptitude_install $aptitude_dhcpclient_install

# Workaround for Debian bug#272257 (see http://bugs.debian.org/281264 )
#rm -f "$targettemp/etc/resolv.conf"

# Prepare kernel installation
# TODO: support yaird and mkramfs too
# FIXME: deal with initrd generated while on host
if [ -n "$RAMDISKTOOL" = "initrd-tools" ]; then
	preserveolderfile "$targettemp/etc/mkinitrd/mkinitrd.conf" orig
	perl -pi -e "s¡^ROOT=.*¡ROOT=$rootdev_target¡" "$targettemp/etc/mkinitrd/mkinitrd.conf"
	perl -pi -e "s¡^MODULES=.*¡MODULES=dep¡" "$targettemp/etc/mkinitrd/mkinitrd.conf"
	preserveandaddlines "$targettemp/etc/mkinitrd/modules" orig 1 $modules_install
fi
preserveandaddlines "$targettemp/etc/kernel-img.conf" orig 1 \
	"do_symlinks = no" \
	"relative_links = yes" \
	"do_bootloader = no" \
	"do_bootfloppy = no" \
	"do_initrd = yes" \
	"link_in_boot = no" \
	"silent_modules = yes"
# FIXME: check if these are actually still any use with latest kernels
cp -af initrd-tools/usbstick "$targettemp/usr/share/initrd-tools/scripts/usbstick"
chmod 0755 "$targettemp/usr/share/initrd-tools/scripts/usbstick"
cp -af initrd-tools/initrd.usbinit "$targettemp/usr/local/share/initrd.usbinit"

if [ "$FLASHYBRID" = "yes" ]; then
	addaddons flashybrid_diskstore flashybrid_diskstore $addons
#	preserveandaddlines "$targettemp/etc/flashybrid/config" orig 1 "EMBED_CMDS=\"mount -o remount,ro /; invoke-rc-d mountvirtfs start\""
	preserveandaddlines "$targettemp/etc/flashybrid/ramtmp" orig 1 $flashybrid_ramtmp
	preserveandaddlines "$targettemp/etc/flashybrid/ramstore" orig 1 $flashybrid_ramstore
	preserveandaddlines "$targettemp/etc/flashybrid/diskstore" orig 1 $flashybrid_diskstore
	# Disable /dev
	# FIXME: Add and honour flag about using udev or not
	preserveandhashdisablelines "$targettemp/etc/flashybrid/ramstore" orig 1 "/dev"
	# Move off flashybrid directories (but leave empty dir behind)
	mkdir -p "$targetoffline" "$targettemp/ram" "$targettemp/disk"
	preserveandaddlines "$targettemp/etc/fstab" orig 2 "$diskdev_target\t/disk\t$diskfs\tdefaults,noauto,nolock\t0\t0"
	# FIXME: Somehow make this step idempotent
	for dir in $flashybrid_diskstore; do
		if [ -d "${targettemp}${dir}" ]; then
			mkdir -p "$(dirname "${targetoffline}${dir}")"
			mv "${targettemp}${dir}" "${targetoffline}${dir}"
		else
			mkdir -p "${targetoffline}${dir}"
		fi
		mkdir -p "${targettemp}${dir}"
	done
	preserveolderfile "$targettemp/etc/default/flashybrid" orig
	perl -pi -e "s¡^ENABLED=.*¡ENABLED=yes¡" "$targettemp/etc/default/flashybrid"
fi

if [ -n "$grubdev_host" ]; then
	# Prepare GRUB install
	mkdir -p "$targettemp/boot/grub"
	mkgrubdevmap "$usbdev_target" > "$targettemp/boot/grub/device.map"
	cp -af "$targettemp/lib/grub/i386-pc/"* "$targettemp/boot/grub"
	# FIXME: Invent a hook wrapping both this and other bootloaders
	preserveandaddlines "$targettemp/etc/kernel-img.conf" orig 1 "postinst_hook = /sbin/update-grub" "postrm_hook   = /sbin/update-grub"
#	preserveandaddlines "$targettemp/boot/grub/menu.lst" orig 1 "default 0" "timeout 5" "color cyan/blue white/blue"
	# FIXME: Write update-grub wrapper that disables "savedefault" option
	./chroot.sh temp update-grub -y
fi

# Install kernel(s)
# (must be after GRUB preparation but before SYSLINUX)
./chroot.sh temp aptitude install -y --without-recommends $aptitude_kernel_install
if [ -n "$grubdev_host" ]; then
	# FIXME: Write a kernel install hook to always strip
	# TODO: Rewrite as single-line perl routine
	cp -af "$targettemp/boot/grub/menu.lst" "$targettemp/boot/grub/menu.lst.old"
	grep -v -x 'savedefault' "$targettemp/boot/grub/menu.lst.old" > "$targettemp/boot/grub/menu.lst"
	rm -f "$targettemp/boot/grub/menu.lst.old"
fi

if [ -n "$syslinuxdev_host" ]; then
	mkdir -p "$targettemp_fat"
	cp -af "$targettemp/boot/initrd.img-${kernel_name}" "$targettemp_fat/initrd.img"
	cp -af "$targettemp/boot/vmlinuz-${kernel_name}" "$targettemp_fat/vmlinuz"
	enableoraddlines "$targettemp_fat/syslinux.cfg" 1 "default vmlinuz" "append initrd=initrd.img ramdisk_size=10240 root=$rootdev_target ro"
fi

# Install additional packages
export DEBIAN_FRONTEND="noninteractive"
addaddons aptitude_install_custom aptitude_install $addons
if [ -n "$aptitude_install_custom" ]; then
	./chroot.sh temp aptitude install -y --without-recommends $aptitude_install_custom
fi

# ifupdown temporarily installs a dir, but cannot replace with symlink later due to rad-only rootfs
for context in network resolvconf; do
	if [ -d "$targettemp/etc/$context/run" ] && [ ! -L "$targettemp/etc/$context/run" ]; then
		rm -rf "$targettemp/etc/$context/run"
		ln -s "/dev/shm/$context" "$targettemp/etc/$context/run"
	fi
done

# Remove hack to suppress warnings about insecure install
rm -f "$targettemp/etc/apt/apt.conf.d/99localforcedautoinstall"

# Strip encryption keys (we don't want them distributed!)
for keyfile in ssh_host_key ssh_host_rsa_key ssh_host_dsa_key; do
	rm -f "$targettemp/etc/ssh/$keyfile" "$targettemp/etc/ssh/$keyfile.pub"
done

echo 'Done creating rootfs!'