#! /bin/sh
set -e

. /usr/share/debconf/confmodule
db_capb backup

. /usr/lib/base-installer/library.sh

ETCDIR=/target/etc
KEYRING=/usr/share/keyrings/ubuntu-archive-keyring.gpg

# Architecture and OS detection
ARCH=`udpkg --print-architecture`
OS=`udpkg --print-os`

# Set initial value to includes and excludes
db_get base-installer/includes
INCLUDES="$(printf '%s' "$RET" | sed 's/ /,/g')" || true

db_get base-installer/excludes
EXCLUDES="$(printf '%s' "$RET" | sed 's/ /,/g')" || true

# Check if a specific script should be used
db_get base-installer/debootstrap_script
DEBOOTSTRAP_SCRIPT="$RET"
if [ ! -e /usr/share/debootstrap/scripts/"$DEBOOTSTRAP_SCRIPT" ]; then
	error "debootstrap script '$DEBOOTSTRAP_SCRIPT' doesn't exist"
fi

# Check if a specific variant should be used
if db_get base-installer/debootstrap_variant && [ "$RET" ]; then
	DEBOOTSTRAP_VARIANT="--variant=$RET"
fi

# Avoid debconf sending email during the base install process
DEBCONF_ADMIN_EMAIL=""
export DEBCONF_ADMIN_EMAIL

SUBARCH="$(archdetect)"
SUBARCH="${SUBARCH#*/}"

# Avoid locale related errors during package installations
export IT_LANG_OVERRIDE=C


# See kernel/README for the architecture-specific functions expected here
if [ -f /usr/lib/base-installer/kernel.sh ]; then
	. /usr/lib/base-installer/kernel.sh
else
	arch_get_kernel_flavour () {
		warning "Unknown architecture '$ARCH'."
		return 0
	}
	arch_check_usable_kernel () {
		warning "Unknown architecture '$ARCH'."
		return 0
	}
	arch_get_kernel () {
		warning "Unknown architecture '$ARCH'."
	}
fi

FLAVOUR="$(arch_get_kernel_flavour || true)"

install_base_system () {
	if [ -s /cdrom/.disk/base_include ]; then
		INCLUDES="$INCLUDES,`grep -v '^#' /cdrom/.disk/base_include | tr '\n' , | sed 's/^,//g;s/,$//'`"
	fi

	if [ -s /cdrom/.disk/base_exclude ]; then
		EXCLUDES="$EXCLUDES,`grep -v '^#' /cdrom/.disk/base_exclude | tr '\n' , | sed 's/^,//g;s/,$//'`"
	fi

	db_progress INFO base-installer/progress/preparing

	if [ "${INCLUDES}" ]; then
		include="--include=${INCLUDES}"
	fi
	if [ "${EXCLUDES}" ]; then
		exclude="--exclude=${EXCLUDES}"
	fi
	sigcheck="--no-check-gpg"
	if [ "$PROTOCOL" = http ] || [ "$PROTOCOL" = ftp ]; then
		if type gpgv >/dev/null; then
			if ! db_get debian-installer/allow_unauthenticated || [ "$RET" != true ]; then
				sigcheck="--keyring=${KEYRING}"
			fi
		else
			warning "gpgv not found, not authenticating archive"
		fi
	elif [ "$PROTOCOL" = https ]; then
		if db_get debian-installer/allow_unauthenticated_ssl && [ "$RET" = true ]; then
			sigcheck="$sigcheck --no-check-certificate"
		fi
	fi

	test -d $ETCDIR || mkdir -p $ETCDIR

	local copied_fstab=
	if [ -f /target/etc/fstab ] ; then
		# programs in debootstrap may scrawl on the fstab and
		# a configured fstab can cause problems, so make a backup
		# to be restored later and create a dummy file instead
		copied_fstab=1
		cp /target/etc/fstab /target/etc/fstab.orig
		echo "# UNCONFIGURED FSTAB FOR BASE SYSTEM" >/target/etc/fstab
	fi

	if [ "$PROTOCOL" = "http" ]; then
		db_get mirror/http/proxy
		http_proxy="$RET" || true
		if [ "$http_proxy" ]; then
			export http_proxy
		fi
	elif [ "$PROTOCOL" = "https" ]; then
		db_get mirror/https/proxy
		https_proxy="$RET" || true
		if [ "$https_proxy" ]; then
			export https_proxy
		fi
	fi

	# clean up after any past debootstrap run
	rm -f /target/var/lib/apt/* 2>/dev/null || true

	local debootstrap_failed=
	if search-path cdebootstrap; then
		cdebootstrap || debootstrap_failed=$?
	else
		log-output -t debootstrap run-debootstrap \
			--components="${COMPONENTS}" \
			--debian-installer \
			--resolve-deps \
			${include} ${exclude} \
			${sigcheck} \
			${DEBOOTSTRAP_VARIANT} \
			${DISTRIBUTION} /target \
			"$PROTOCOL://$MIRROR$DIRECTORY" \
			${DEBOOTSTRAP_SCRIPT} \
			|| debootstrap_failed=$?
	fi

	if [ "$copied_fstab" ]; then
		mv /target/etc/fstab.orig /target/etc/fstab
	fi

	if [ "$debootstrap_failed" ]; then
		exit_error base-installer/debootstrap-failed
	fi

	# If we need SSL certificates, copy them in now.
	if [ "$PROTOCOL" = "https" ] && [ -d /etc/ssl/certs ]; then
		if find /etc/ssl/certs/ -name \*.crt | grep -q .; then
			mkdir -p /target/usr/local/share/ca-certificates
			cp -a /etc/ssl/certs/*.crt /target/usr/local/share/ca-certificates/
			chroot /target update-ca-certificates || true
		fi
	fi

	# Progress bar is now stepped to 100
}

waypoint 1	check_target
waypoint 1	get_mirror_info
waypoint 1	pre_install_hooks
waypoint 100	install_base_system
waypoint 1	setup_dev
waypoint 1	configure_apt_preferences
waypoint 1	configure_apt
waypoint 1	configure_apt_overlay
waypoint 3	apt_update
waypoint 5	post_install_hooks
waypoint 1	pick_kernel
waypoint 20	install_kernel
waypoint 10	install_extra
waypoint 0	final_apt_preferences
waypoint 0	cleanup

run_waypoints base-installer/progress/installing-base
exit 0