# shellcheck shell=sh
if which ubuntu-distro-info >/dev/null 2>&1; then
	if ubuntu-distro-info --supported | grep -q "$SUITE" >/dev/null 2>&1; then
		supported=true
	else
		supported=false
	fi
elif which curl >/dev/null 2>&1 && which jq >/dev/null 2>&1; then
	supported="$(curl -s https://endoflife.date/api/ubuntu.json | jq --arg suite $SUITE '[.[] | select((.extendedSupport // .support) > (now | strftime("%Y-%m-%d")) and (.codename | test($suite; "i")))] | isempty(.[]) | not')"
else
	supported=true
fi

if [ "$supported" = true ]; then
	case "$ARCH" in
		amd64|i386)
			default_mirror http://archive.ubuntu.com/ubuntu
		;;
		*)
			default_mirror http://ports.ubuntu.com/ubuntu-ports
		;;
	esac
	keyring /usr/share/keyrings/ubuntu-archive-keyring.gpg
else
	default_mirror http://old-releases.ubuntu.com/ubuntu
	keyring /usr/share/keyrings/ubuntu-archive-removed-keys.gpg
fi
# Note: The "removed keys" does not automatically tally with unsupported releases.
# In this case the user will need to use the --keyring= switch.

mirror_style release
download_style apt
finddebs_style from-indices
variants - buildd fakechroot minbase

if doing_variant fakechroot; then
	test "$FAKECHROOT" = "true" || error 1 FAKECHROOTREQ "This variant requires fakechroot environment to be started"
fi

case $ARCH in
	alpha|ia64) LIBC="libc6.1" ;;
	kfreebsd-*) LIBC="libc0.1" ;;
	hurd-*)     LIBC="libc0.3" ;;
	*)          LIBC="libc6" ;;
esac

# impish+ will use zstd compression, check if supported
if [ $(ubuntu-distro-info -r --series "$1" | cut -d. -f1) -gt 20 ]; then
	dpkg_zstd="$(dpkg-deb --help 2>/dev/null | grep ' zstd,' || :)"
	if [ -z "${EXTRACTOR_OVERRIDE-}" ] && [ -z "$dpkg_zstd" ]; then
		info CHOSENEXTRACTOR "%s uses zstd compression, setting --extractor=ar option" "$SUITE"
		export EXTRACTOR_OVERRIDE=ar
	fi
fi

work_out_debs () {
	required="$(get_debs Priority: required)"

	if doing_variant - || doing_variant fakechroot; then
		#required="$required $(get_debs Priority: important)"
		#  ^^ should be getting debconf here somehow maybe
		base="$(get_debs Priority: important)"
	elif doing_variant buildd; then
		base="apt build-essential"
	elif doing_variant minbase; then
		base="apt"
	fi

	if doing_variant fakechroot; then
		# ldd.fake needs binutils
		required="$required binutils"
	fi

	case $MIRRORS in
	    https://*)
		case "$CODENAME" in
			gutsy|hardy|intrepid|jaunty|karmic|lucid|maverick|natty|oneiric|precise|quantal|raring|saucy|trusty|utopic|vivid|wily|xenial|yakkety|zesty)
			base="$base apt-transport-https ca-certificates"
			;;
			*)
			base="$base ca-certificates"
			;;
		esac
		;;
	esac

	# do not install usrmerge in fresh bootstraps
	# but do print it for germinate to accept it into minimal
	if [ "$WHAT_TO_DO" = "finddebs printdebs kill_target" ]; then
		case "$CODENAME" in
			# "merged-usr" blacklist for past releases
			gutsy|hardy|intrepid|jaunty|karmic|lucid|maverick|natty|oneiric|precise|quantal|raring|saucy|trusty|utopic|vivid|wily|xenial|yakkety|zesty|artful|bionic|cosmic|disco|eoan|focal|groovy)
			;;
			hirsute)
				# keep hirsute buildd chroots split-usr to allow for escape hatch
				if ! doing_variant buildd; then
					if [ -z "$MERGED_USR" ] || [ "$MERGED_USR" = "yes" ]; then
						base="$base usrmerge"
					fi
				fi
				;;
			*)
				# all future series post hirsute use merged-usr in buildd chroots too
				if [ -z "$MERGED_USR" ] || [ "$MERGED_USR" = "yes" ]; then
					base="$base usrmerge"
				fi
				;;
		esac
	fi
}

first_stage_install () {
	case "$CODENAME" in
		# "merged-usr" blacklist for past releases
		gutsy|hardy|intrepid|jaunty|karmic|lucid|maverick|natty|oneiric|precise|quantal|raring|saucy|trusty|utopic|vivid|wily|xenial|yakkety|zesty|artful|bionic|cosmic)
			[ -z "$MERGED_USR" ] && MERGED_USR="no"
			;;
		disco|eoan|focal|groovy)
			# see https://bugs.debian.org/838388
			EXTRACT_DEB_TAR_OPTIONS="$EXTRACT_DEB_TAR_OPTIONS -k"
			;;
		hirsute)
			# keep hirsute buildd chroots split-usr to allow for escape hatch
			if [ -z "$MERGED_USR" ]; then
				if doing_variant buildd; then
					MERGED_USR="no"
				else
					MERGED_USR="yes"
				fi
			fi
			# see https://bugs.debian.org/838388
			EXTRACT_DEB_TAR_OPTIONS="$EXTRACT_DEB_TAR_OPTIONS -k"
			;;
		*)
			# all future series post hirsute use merged-usr in buildd chroots too
			[ -z "$MERGED_USR" ] && MERGED_USR="yes"
			# see https://bugs.debian.org/838388
			EXTRACT_DEB_TAR_OPTIONS="$EXTRACT_DEB_TAR_OPTIONS -k"
			;;
	esac

	extract $required
	merge_usr

	mkdir -p "$TARGET/var/lib/dpkg"
	: >"$TARGET/var/lib/dpkg/status"
	: >"$TARGET/var/lib/dpkg/available"

	setup_etc
	if [ ! -e "$TARGET/etc/fstab" ]; then
		echo '# UNCONFIGURED FSTAB FOR BASE SYSTEM' > "$TARGET/etc/fstab"
		chown 0:0 "$TARGET/etc/fstab"; chmod 644 "$TARGET/etc/fstab"
	fi

	setup_devices

        if doing_variant fakechroot || [ "$CONTAINER" = "docker" ]; then
		setup_proc_symlink
	fi
}

second_stage_install () {
	in_target /bin/true

	setup_dynamic_devices

	x_feign_install () {
		local pkg deb ver
		pkg="$1"
		deb="$(debfor $pkg)"
		ver="$(in_target dpkg-deb -f "$deb" Version)"

		mkdir -p "$TARGET/var/lib/dpkg/info"

		echo \
"Package: $pkg
Version: $ver
Maintainer: unknown
Status: install ok installed" >> "$TARGET/var/lib/dpkg/status"

		touch "$TARGET/var/lib/dpkg/info/${pkg}.list"
	}

	x_feign_install dpkg

	x_core_install () {
		smallyes '' | in_target dpkg --force-depends --install $(debfor "$@")
	}

	p () {
		baseprog="$((baseprog + 1))"
	}

	if ! doing_variant fakechroot; then
		setup_proc
		in_target /sbin/ldconfig
	fi

	DEBIAN_FRONTEND=noninteractive
	DEBCONF_NONINTERACTIVE_SEEN=true
	export DEBIAN_FRONTEND DEBCONF_NONINTERACTIVE_SEEN

	baseprog=0
	bases=7

	p; progress $baseprog "$bases" INSTCORE "Installing core packages" #1
	info INSTCORE "Installing core packages..."

	p; progress $baseprog "$bases" INSTCORE "Installing core packages" #2
	ln -sf mawk "$TARGET/usr/bin/awk"
	x_core_install base-passwd
	x_core_install base-files
	p; progress $baseprog "$bases" INSTCORE "Installing core packages" #3
	x_core_install dpkg

	if [ ! -e "$TARGET/etc/localtime" ]; then
		ln -sf /usr/share/zoneinfo/UTC "$TARGET/etc/localtime"
	fi

	if doing_variant fakechroot; then
		install_fakechroot_tools
	fi

	p; progress $baseprog "$bases" INSTCORE "Installing core packages" #4
	x_core_install $LIBC

	p; progress $baseprog "$bases" INSTCORE "Installing core packages" #5
	x_core_install perl-base

	p; progress $baseprog "$bases" INSTCORE "Installing core packages" #6
	rm "$TARGET/usr/bin/awk"
	x_core_install mawk

	p; progress $baseprog "$bases" INSTCORE "Installing core packages" #7
	if doing_variant -; then
		x_core_install debconf
	fi

	baseprog=0
	bases=$(set -- $required; echo $#)

	info UNPACKREQ "Unpacking required packages..."

	exec 7>&1

	smallyes '' |
		(repeatn 5 in_target_failmsg UNPACK_REQ_FAIL_FIVE "Failure while unpacking required packages.  This will be attempted up to five times." "" \
		dpkg --status-fd 8 --force-depends --unpack $(debfor $required) 8>&1 1>&7 || echo EXITCODE $?) |
		dpkg_progress $baseprog "$bases" UNPACKREQ "Unpacking required packages" UNPACKING

	info CONFREQ "Configuring required packages..."

	if doing_variant fakechroot && [ -e "$TARGET/var/lib/dpkg/info/initscripts.postinst" ]
	then
		# fix initscripts postinst (no mounting possible, and wrong if condition)
		sed -i '/dpkg.*--compare-versions/ s/\<lt\>/lt-nl/' "$TARGET/var/lib/dpkg/info/initscripts.postinst"
	fi

	echo \
"#!/bin/sh
exit 101" > "$TARGET/usr/sbin/policy-rc.d"
	chmod 755 "$TARGET/usr/sbin/policy-rc.d"

	mv "$TARGET/sbin/start-stop-daemon" "$TARGET/sbin/start-stop-daemon.REAL"
	echo \
"#!/bin/sh
echo
echo \"Warning: Fake start-stop-daemon called, doing nothing\"" > "$TARGET/sbin/start-stop-daemon"
	chmod 755 "$TARGET/sbin/start-stop-daemon"

	if [ -x "$TARGET/sbin/initctl" ]; then
	  mv "$TARGET/sbin/initctl" "$TARGET/sbin/initctl.REAL"
	  echo \
"#!/bin/sh
if [ \"\$1\" = version ]; then exec /sbin/initctl.REAL \"\$@\"; fi
echo
echo \"Warning: Fake initctl called, doing nothing\"" > "$TARGET/sbin/initctl"
	  chmod 755 "$TARGET/sbin/initctl"
	fi

	setup_dselect_method apt

	smallyes '' |
		(in_target_failmsg CONF_REQ_FAIL "Failure while configuring required packages." "" \
		dpkg --status-fd 8 --configure --pending --force-configure-any --force-depends 8>&1 1>&7 || echo EXITCODE $?) |
		dpkg_progress $baseprog "$bases" CONFREQ "Configuring required packages" CONFIGURING

	baseprog=0
	bases="$(set -- $base; echo $#)"

	info UNPACKBASE "Unpacking the base system..."

	setup_available $required $base
	done_predeps=
	while predep=$(get_next_predep); do
		# We have to resolve dependencies of pre-dependencies manually because
		# dpkg --predep-package doesn't handle this.
		predep=$(without "$(without "$(resolve_deps $predep)" "$required")" "$done_predeps")
		# XXX: progress is tricky due to how dpkg_progress works
		# -- cjwatson 2009-07-29
		p; smallyes '' |
		in_target dpkg --force-overwrite --force-confold --skip-same-version --install $(debfor $predep)
		base=$(without "$base" "$predep")
		done_predeps="$done_predeps $predep"
	done

	if [ -n "$base" ]; then
		smallyes '' |
			(repeatn 5 in_target_failmsg INST_BASE_FAIL_FIVE "Failure while installing base packages.  This will be re-attempted up to five times." "" \
			dpkg --status-fd 8 --force-overwrite --force-confold --skip-same-version --unpack $(debfor $base) 8>&1 1>&7 || echo EXITCODE $?) |
			dpkg_progress $baseprog "$bases" UNPACKBASE "Unpacking base system" UNPACKING

		info CONFBASE "Configuring the base system..."

		smallyes '' |
			(repeatn 5 in_target_failmsg CONF_BASE_FAIL_FIVE "Failure while configuring base packages.  This will be re-attempted up to five times." "" \
			dpkg --status-fd 8 --force-confold --skip-same-version --configure -a 8>&1 1>&7 || echo EXITCODE $?) |
			dpkg_progress $baseprog "$bases" CONFBASE "Configuring base system" CONFIGURING
	fi

	if [ -x "$TARGET/sbin/initctl.REAL" ]; then
		mv "$TARGET/sbin/initctl.REAL" "$TARGET/sbin/initctl"
	fi
	mv "$TARGET/sbin/start-stop-daemon.REAL" "$TARGET/sbin/start-stop-daemon"
	rm -f "$TARGET/usr/sbin/policy-rc.d"

	progress "$bases" "$bases" CONFBASE "Configuring base system"
	info BASESUCCESS "Base system installed successfully."
}