#! /bin/sh
set -e

if [ -e config/germinate-output ]; then
            mv -T config/germinate-output germ-tmp
            rm -rf config
            mkdir config
            mv -T germ-tmp config/germinate-output
else
        rm -rf config
fi

echo "Building on $(hostname --fqdn)"

SEEDMIRROR=https://ubuntu-archive-team.ubuntu.com/seeds/
if [ -z "$MIRROR" ]; then
	case $(hostname --fqdn) in
		*.ubuntu.com|*.buildd|*.ppa|*.scalingstack)
			MIRROR=http://ftpmaster.internal/ubuntu/
			SEEDMIRROR=http://archive-team.internal/seeds/
			;;
		*)
			case $ARCH in
				i386|amd64)	MIRROR=http://archive.ubuntu.com/ubuntu/ ;;
				*)		MIRROR=http://ports.ubuntu.com/ubuntu-ports/ ;;
			esac
			;;
	esac
fi

mkdir -p config
cp -af /usr/share/livecd-rootfs/live-build/functions config/functions
cp -af /usr/share/livecd-rootfs/live-build/lb_*_layered config/
cp -af /usr/share/livecd-rootfs/live-build/snap-seed-parse.py config/snap-seed-parse
cp -af /usr/share/livecd-rootfs/live-build/expand-task config/expand-task
cp -af /usr/share/livecd-rootfs/live-build/squashfs-exclude-files config/

mkdir -p config/package-lists

. config/functions

OPTS=
COMPONENTS=
BINARY_REMOVE_LINUX=:
BINARY_IMAGES=none
MEMTEST=none
SOURCE='--source false'
BOOTLOADER=none
BOOTAPPEND_LIVE=
LIVE_TASK=
PREINSTALLED=false
PREINSTALL_POOL=
PREINSTALL_POOL_SEEDS=
PREFIX="livecd.$PROJECT${SUBARCH:+-$SUBARCH}"

CHROOT_HOOKS=
BINARY_HOOKS=

APT_OPTIONS=" --yes -oDebug::pkgDepCache::AutoInstall=yes "

PASSES_TO_LAYERS=false
_PASSES_TO_LAYERS=		# Stores the initial value of PASSES_TO_LAYERS
PASSES=

_check_immutable_passes_to_layers () {
	# Check that PASSES_TO_LAYERS didn't change ie we didn't switch from layer
	# to non-layer image format and vice versa.
	if [ -z "$_PASSES_TO_LAYERS" ]; then
		_PASSES_TO_LAYERS=$PASSES_TO_LAYERS
	fi

	if [ "$_PASSES_TO_LAYERS" != "$PASSES_TO_LAYERS" ]; then
		echo "ERROR: PASSES_TO_LAYERS has changed from $_PASSES_TO_LAYERS to $PASSES_TO_LAYERS between 2 API calls. Please set it first."
		exit 1
	fi
}

_check_layers_only_API () {
	# Check if a function is designed only for layered mode
	# $1 name of the function
	if [ "$PASSES_TO_LAYERS" != "true" ]; then
		echo "$1 should only be used in layered mode, with PASSES_TO_LAYERS set to true"
		exit 1
	fi
}

_register_pass () {
	# In layer mode, record a pass into the list of passes
	# $1 Name of the pass
	[ "$PASSES_TO_LAYERS" != "true" ] && return

	PASSES="$PASSES $1"
}

add_pass ()
{
	local pass="$1"
	_check_immutable_passes_to_layers
	_register_pass "$pass"
}

add_task ()
{
	local pass="$1"
	shift
	local file pkg_file snap_file task

	_check_immutable_passes_to_layers
	_register_pass "$pass"

	if [ ! -e config/germinate-output/structure ]; then
		echo "add_task too soon" >&2
		exit 1
	fi

	pkg_file="config/package-lists/livecd-rootfs.list.chroot_$pass"

        if [ $PASSES_TO_LAYERS = "true" ]; then
	    snap_file="config/package-lists/livecd-rootfs.snaplist.chroot_$pass.full"
        else
            snap_file="config/seeded-snaps"
        fi

	for task; do
		./config/expand-task config/germinate-output $FLAVOUR $task packages >> "$pkg_file"
		./config/expand-task config/germinate-output $FLAVOUR $task snaps >> "$snap_file"
	done

	for file in $pkg_file $snap_file; do
		if [ -s $file ]; then
			sort -u -o $file $file
		else
			rm -f $file
		fi
	done
}

add_package ()
{
	# Adds a pass named pass_name composed of packages to install
	# $1 pass
	# $@ list of packages

	local pass="$1"
	shift
	local pkg

	_check_immutable_passes_to_layers
	_register_pass "$pass"

	for pkg; do
		echo "$pkg" >> "config/package-lists/livecd-rootfs.list.chroot_$pass"
	done
}

remove_package ()
{
	# Adds a pass named pass_name composed of packages to remove
	# $1 pass
	# $@ list of packages

	local pass="$1"
	shift
	local pkg

	_check_immutable_passes_to_layers
	_check_layers_only_API "remove_package"
	_register_pass "$pass"

	for pkg; do
		echo "$pkg" >> "config/package-lists/livecd-rootfs.removal-list.chroot_$pass"
	done
}

add_snap ()
{
	# Adds a pass named pass_name composed of snaps to install
	# $1 pass
	# $@ list of snaps

	local pass="$1"
	shift
	local pkg

	_check_immutable_passes_to_layers
	_register_pass "$pass"

	local channel=""
	if [ -n "$CHANNEL" ] ; then
		channel="=$CHANNEL"
	fi

	for pkg; do
		echo "$pkg$channel" >> "config/package-lists/livecd-rootfs.snaplist.chroot_$pass.full"
	done
}

get_seeded_languages () {
	# We assume any seed name of the form ${no_lang_seed}-${foo} where
	# ${foo} is only two or three characters long is a default language
	# seed.
	langs=''
	for no_lang_seed in "$@"; do
		seed_regex="${no_lang_seed}"'-[^-.]{2,3}$'
		for seed in $(ls config/germinate-output | grep -E "${seed_regex}"); do
			lang=$(echo "${seed}" | grep -oE '[^-.]{2,3}$')
			langs="$langs $lang"
		done
	done
	echo $langs | tr ' ' '\n' | sort -u | tr '\n' ' '
}

derive_language_layers () {
	# create special layers for each default language
	#
	# $1 base pass
	# $2 base seed (without any languages)
	# $3 default language seed
	# $4 space separated list of default languages
	# e.g.:
	#    derive_language_layers minimal desktop-minimal desktop-minimal-default-languages
	#    derive_language_layers minimal.standard desktop desktop-default-languages
	#
	# The way this works is perhaps a little counterintuitive.
	#
	# The first goal here is that the installed system should contain
	# language support for the language the user selected.  One way to do
	# this using layers would be to have a layer that contained no
	# language support and a derived layer for each (default) language. So
	# something like:
	#
	#    filesystem.squashfs    (contains no language support)
	#    filesystem.en.squashfs (contains English language support)
	#    filesystem.fr.squashfs (contains French language support)
	#    ...
	#
	# Then if the user selects French as their language, we just copy
	# filesystem.fr.squashfs to the target system.
	#
	# But we want the live session to support these languages too and
	# simply adding all the language support to the live layer would mean
	# we'd have the each language's support files on the ISO twice (once
	# in filesystem.$LANG.squashfs and once in filesystem.live.squashfs).
	#
	# So what is done instead is that we add support for all the default
	# languages to the base layer and then create derived layers that
	# _remove_ support for all languages but the desired language and
	# because file removals are cheap to represent in overlays, this all
	# ends up taking way less space, and filesystem.live.squashfs gets
	# support for all languages from the base layer.  We also create a
	# layer than has support for all languages removed, which can be used
	# for the base of an install for a non-default language.
	local pass base_pass=$1 no_lang_seed=$2 def_lang_seed=$3 langs=$4
	_check_immutable_passes_to_layers
	_check_layers_only_API "derive_language_layers"

	for lang in $langs; do
		pass="${base_pass}.${lang}"
		_register_pass ${pass}
		# Remove packages from the default language seed that are not
		# in the language specific seed from the language specific layer.
		# I find this expression helps a little to make this make sense:
		#  ((base) + (en fr de)) - (  (en fr de)   - (fr)) ==        (base + fr)
		# `layer will all langs'   `def_lang_seed'  `lang'    `what we want to install'
		subtract_package_lists ${def_lang_seed} ${no_lang_seed}-${lang} >> config/package-lists/livecd-rootfs.removal-list.chroot_$pass
	done

	no_lang_pass=$base_pass.no-languages
	_register_pass ${no_lang_pass}
	# Remove all packages from the default language seed that are not in
	# the no_lang_seed from the no-languages layer.
	subtract_package_lists ${def_lang_seed} ${no_lang_seed} >> config/package-lists/livecd-rootfs.removal-list.chroot_${no_lang_pass}
}

add_chroot_hook ()
{
	CHROOT_HOOKS="${CHROOT_HOOKS:+$CHROOT_HOOKS }$1"
}

add_binary_hook ()
{
	BINARY_HOOKS="${BINARY_HOOKS:+$BINARY_HOOKS }$1"
}

_sanitize_passes ()
{
	# Returns an uniquely ordered list of passes and ensure dependency tree is coherent
	# $1 list of passes
	local passes="$1"
	[ -z "$passes" ] && return

	passes=$(echo $passes | tr ' ' '\n' | sort -u)
	for pass in $passes; do
		parent=$(get_parent_pass $pass)
		# if root pass, no parent to find
		[ -z "$parent" ] && continue
		if [ $(echo "$passes"|grep -cE "^$parent\$") -ne 1 ]; then
			echo "ERROR: '$parent' is required by '$pass' but is missing. Registered passes are:\n$passes" >&2
			exit 1
		fi
	done

	# return the list of passes
	echo $passes
}

_get_live_passes ()
{
	# Returns a list of all passes that ends with .live for automated live passes detection
	# $1 list of passes
	local passes="$1"
	local livepasses=""
	[ -z "$passes" ] && return

	for pass in $passes; do
		if echo $pass | grep -Eq '\.live$'; then
			livepasses="$pass $livepasses"
		fi
	done
	echo $livepasses
}

if [ -z "${IMAGEFORMAT:-}" ]; then
	case $PROJECT:${SUBPROJECT:-} in
		ubuntu-cpc:*|ubuntu:desktop-preinstalled|ubuntu-wsl:*)
			case $ARCH+${SUBARCH:-} in
				*+raspi)
					# All raspi images use ubuntu-image.
					IMAGEFORMAT=ubuntu-image
					;;
				arm64+tegra|arm64+tegra-igx)
					# Pre-installed Tegra images use
					# ubuntu-image
					IMAGEFORMAT=ubuntu-image
					;;
				*)
					IMAGEFORMAT=ext4
					;;
			esac
			;;
		ubuntu-server:live|ubuntu-mini-iso:)
			IMAGEFORMAT=plain
			;;
	esac
fi

# Configure preinstalled ubuntu-cpc images with included password
# one also must request disk1-img-xz image format
if [ "$IMAGEFORMAT" = "ext4" ] && [ "$PROJECT" = "ubuntu-cpc" ]; then
	case $ARCH:$SUBARCH in
		armhf:raspi2 | \
		riscv64:icicle | \
		riscv64:nezha | \
		riscv64:licheerv | \
		riscv64:unmatched | \
		riscv64:visionfive | \
		riscv64:visionfive2 | \
		*:generic)
			IMAGE_HAS_HARDCODED_PASSWORD=1
			if [ -z "${IMAGE_TARGETS:-}" ]; then
				export IMAGE_TARGETS="disk-image-non-cloud"
			fi
			;;
	esac
fi

skip_lb_stage() {
	STAGE="$1"
	mkdir -p .build
	touch ".build/$STAGE"
}

case $IMAGEFORMAT in
	ext2|ext3|ext4)
		OPTS="${OPTS:+$OPTS }--initramfs none --chroot-filesystem $IMAGEFORMAT"
		PREINSTALLED=true
		;;
	plain)
		case $PROJECT:${SUBPROJECT:-} in
			ubuntu-server:live)
	                        touch config/universe-enabled
				;;
			ubuntu-mini-iso:)
				;;
			*)
				PREINSTALLED=true
				;;
		esac
		OPTS="${OPTS:+$OPTS }--initramfs none --chroot-filesystem $IMAGEFORMAT"
		;;

	ubuntu-image)
		UBUNTU_IMAGE_ARGS=""
		case "$ARCH+${SUBARCH:-}" in
			amd64+intel-iot)
				MODEL=intel-iot ;;
			amd64+*)
				MODEL=pc-amd64 ;;
			arm64+snapdragon)
				MODEL=dragonboard ;;
			armhf+raspi)
				MODEL=pi ;;
			armhf+raspi2)
				MODEL=pi2 ;;
			armhf+raspi3)
				MODEL=pi3 ;;
			arm64+raspi)
				MODEL=pi-arm64 ;;
			arm64+raspi3)
				MODEL=pi3-arm64 ;;
			armhf+cm3)
				MODEL=cm3 ;;
			arm64+tegra)
				MODEL=tegra ;;
			arm64+tegra-igx)
				MODEL=tegra-igx ;;
			arm64+*)
				MODEL=pc-arm64 ;;
			*)
				echo "Model $ARCH+${SUBARCH:-} unknown to livecd-rootfs" >&2
				exit 1
				;;
		esac

		# If we have a datestamp coming from cdimage, use that to populate
		# .disk/info on the target image
		if [ -n "$NOW" ]; then
			echo "$NOW" > config/disk-info
			UBUNTU_IMAGE_ARGS="$UBUNTU_IMAGE_ARGS --disk-info config/disk-info"
		fi

		if [ $PROJECT = "ubuntu-core" ]; then
			# snap-based core images

			CHANNEL="${CHANNEL:-edge}"
			case $MODEL in
				pc-amd64|pc-arm64)
					if [ -z "${SUBARCH:-}" ]; then
						# This is to make sure there's enough writable space
						UBUNTU_IMAGE_ARGS="$UBUNTU_IMAGE_ARGS --image-size 3700M"
					fi
					;;
				*) ;;
			esac
			case $SUITE in
				xenial)
					# Ubuntu Core 16
					UBUNTU_IMAGE_ARGS="$UBUNTU_IMAGE_ARGS -c $CHANNEL"
					;;
				bionic)
					# Ubuntu Core 18
					MODEL="ubuntu-core-18-${MODEL#pc-}"
					UBUNTU_IMAGE_ARGS="$UBUNTU_IMAGE_ARGS -c $CHANNEL"
					;;
				*)
					if [ "$SUITE" = "focal" ]; then
						CORE_MAJOR=20
					else
						CORE_MAJOR=22
					fi
					if [ "${MODEL}" = "pi" ]; then
						MODEL=pi-armhf
					fi
					# Ubuntu Core 2x
					# Currently uc2x assertions do not support global
					# channel overrides, instead we have per-channel models
					case $CHANNEL in
						stable)
							MODEL="ubuntu-core-${CORE_MAJOR}-${MODEL#pc-}"
							;;
						candidate|beta|edge|dangerous)
							MODEL="ubuntu-core-${CORE_MAJOR}-${MODEL#pc-}-${CHANNEL}"
							;;
						dangerous-*)
							# That being said, the dangerous grade *does*
							# support channel overrides, so we can use the
							# dangerous model assertion and override the channel
							# freely.
							MODEL="ubuntu-core-${CORE_MAJOR}-${MODEL#pc-}-dangerous"
							CHANNEL=${CHANNEL#dangerous-}
							UBUNTU_IMAGE_ARGS="$UBUNTU_IMAGE_ARGS -c $CHANNEL"
							;;
						*)
							echo "Unknown CHANNEL ${CHANNEL} specification for ${SUITE}"
							exit 1
							;;
					esac
					;;
			esac

			case "$ARCH+${SUBARCH:-}" in
				amd64+kassel)
					EXTRA_SNAPS="$EXTRA_SNAPS core bluez alsa-utils"
					;;
				*) ;;
			esac
			for snap in $EXTRA_SNAPS; do
				UBUNTU_IMAGE_ARGS="$UBUNTU_IMAGE_ARGS --extra-snaps $snap"
			done
			echo "IMAGEFORMAT=$IMAGEFORMAT" >> config/common
			echo "UBUNTU_IMAGE_ARGS=\"$UBUNTU_IMAGE_ARGS\"" >> config/common
			# Store model assertion in top dir to get it picked up later as a build artifact
			env SNAPPY_STORE_NO_CDN=1 snap known --remote model series=16 model="$MODEL" brand-id=canonical > "$PREFIX".model-assertion
			echo "Configured ubuntu-image for the following model assertion:"
			cat "$PREFIX".model-assertion
			echo "----------------------------------------------------------"
		else
			# classic images

			IMAGE_PROJECT=$PROJECT
			[ "$IMAGE_PROJECT" = "ubuntu-cpc" ] && IMAGE_PROJECT="ubuntu-server"

			LB_UBUNTU_IMAGES_REPO="${LB_UBUNTU_IMAGES_REPO:-git://git.launchpad.net/ubuntu-images}"
			LB_UBUNTU_IMAGES_BRANCH="${LB_UBUNTU_IMAGES_BRANCH:-$SUITE}"
			git clone "$LB_UBUNTU_IMAGES_REPO" -b "$LB_UBUNTU_IMAGES_BRANCH" image-definitions
			IMAGE_DEFINITION="image-definitions/$IMAGE_PROJECT-$MODEL.yaml"
			echo "IMAGE_DEFINITION=$IMAGE_DEFINITION" >> config/common
			echo "Configured ubuntu-image to use image definition file $IMAGE_DEFINITION which has the following contents:"
			cat "$IMAGE_DEFINITION"
			echo "----------------------------------------------------------"
		fi

		# Save the model name used for building, mostly for any model-specific hook execution
		echo "MODEL=$MODEL" >> config/common
		echo "IMAGEFORMAT=$IMAGEFORMAT" >> config/common
		# Fake finished configuration for lb build
		mkdir -p .build
		touch .build/config
		exit 0
		;;

	none)
		# Currently the IMAGEFORMAT none format is used only for ubuntu-image
		# targeted image builds which, currently, only target physical devices.
		OPTS="${OPTS:+$OPTS }--chroot-filesystem $IMAGEFORMAT"
		PREINSTALLED=true
		;;
	*)
		case $PROJECT in
			ubuntu-server|ubuntu-wsl|ubuntu-oem)
				;;
			ubuntu|ubuntu-budgie)
				if [ "$SUBPROJECT" = "legacy" ]; then
					add_package live casper
				fi
				;;
			*)
				add_package live casper
				;;
		esac
		;;
esac

if [ "$PREINSTALLED" = "true" ]; then
	# Touch a random file that we can refer back to during build,
	# cause that's wildly hackish
	touch config/universe-enabled
	case $PROJECT in
		kubuntu*)
			add_package live oem-config-kde ubiquity-frontend-kde
			add_package live ubiquity-slideshow-kubuntu
			;;
		lubuntu*)
			add_package live oem-config-gtk ubiquity-frontend-gtk
			add_package live ubiquity-slideshow-lubuntu
			;;
		xubuntu*)
			add_package live oem-config-gtk ubiquity-frontend-gtk
			add_package live ubiquity-slideshow-xubuntu
			;;
		ubuntu-mate)
			add_package live oem-config-gtk ubiquity-frontend-gtk
			add_package live ubiquity-slideshow-ubuntu-mate
			;;
		ubuntu-unity)
			add_package live oem-config-gtk ubiquity-frontend-gtk
			add_package live ubiquity-slideshow-ubuntu
			;;
		ubuntu-server)
			add_package live oem-config-debconf ubiquity-frontend-debconf
			;;
		ubuntu-base|ubuntu-oci|ubuntu-cpc|ubuntu-wsl|ubuntu-mini-iso)
			;;
		ubuntu)
			add_package live oem-config-gtk ubiquity-frontend-gtk
			add_package live ubiquity-slideshow-ubuntu
			if [ "$SUBPROJECT" = "desktop-preinstalled" ]; then
				add_package live language-pack-en-base oem-config-slideshow-ubuntu
			fi
			;;
		*)
			add_package live oem-config-gtk ubiquity-frontend-gtk
			add_package live ubiquity-slideshow-ubuntu
			;;
	esac
fi

case $BINARYFORMAT in
	iso*|usb*)
		BINARY_IMAGES="$BINARYFORMAT"
		MEMTEST=memtest86+
		BOOTLOADER=syslinux
		OPTS="${OPTS:+$OPTS }--zsync=false"
		;;
esac

if [ "${SUBPROJECT:-}" = minimized ]; then
	OPTS="${OPTS:+$OPTS }--bootstrap-flavour=minimal --linux-packages=linux-image"
fi

mkdir -p config/germinate-output
case $PROJECT in
        edubuntu*)
                FLAVOUR=edubuntu
                ;;
        kubuntu*)
                FLAVOUR=kubuntu
                ;;
        xubuntu*)
                FLAVOUR=xubuntu
                ;;
        ubuntu-mate*)
                FLAVOUR=ubuntu-mate
                ;;
        ubuntu-unity*)
                FLAVOUR=ubuntu-unity
                ;;
        lubuntu*)
                FLAVOUR=lubuntu
                ;;
        ubuntu-budgie*)
                FLAVOUR=ubuntu-budgie
                ;;
        ubuntukylin*)
                FLAVOUR=ubuntukylin
                ;;
        ubuntustudio*)
                FLAVOUR=ubuntustudio
                ;;
        ubuntucinnamon*)
                FLAVOUR=ubuntucinnamon
                ;;
        *)
                FLAVOUR=ubuntu
                ;;
esac

case $PROJECT in
	ubuntu-server|ubuntu-mini-iso)
		COMPONENTS='main'
		;;
	edubuntu|kubuntu|ubuntu-budgie|ubuntu-gnome|ubuntucinnamon|ubuntukylin)
		COMPONENTS='main restricted universe'
		;;
	lubuntu|ubuntu-mate|ubuntu-unity|ubuntustudio-dvd|xubuntu)
		COMPONENTS='main restricted universe multiverse'
		;;
esac

case $SUBPROJECT in
	buildd)
		COMPONENTS='main restricted universe multiverse'
		;;
esac

if ! [ -e config/germinate-output/structure ]; then
        echo "Running germinate..."
        if [ -n "$COMPONENTS" ]; then
		GERMINATE_ARG="-c $(echo $COMPONENTS | sed -e's/ \+/,/g')"
	fi
        (cd config/germinate-output && germinate --no-rdepends --no-installer \
                -S $SEEDMIRROR -m $MIRROR -d $SUITE -s $FLAVOUR.$SUITE \
                $GERMINATE_ARG -a $ARCH)
fi

case $PROJECT in
	ubuntu)

		case ${SUBPROJECT:-} in
			legacy)
				LIVE_TASK='ubuntu-live'
				add_task install minimal standard ubuntu-desktop
				add_task live ubuntu-desktop-minimal-default-languages ubuntu-desktop-default-languages
				KERNEL_FLAVOURS='generic-hwe-22.04'
				if [ "$SUBARCH" = "intel-iot" ]; then
					KERNEL_FLAVOURS='intel-iotg'
				fi
				;;
			desktop-preinstalled)
				add_task install minimal standard ubuntu-desktop
				case $SUBARCH in
					raspi)
						add_task install ubuntu-desktop-raspi
						# XXX: Are those actually needed? I see we use those for ubuntu-cpc, which is the project
						#  for existing raspi preinstalled images
						# XXX: I would prefer to use --hdd-label=desktop-rootfs like 040-hyperv-desktop-images.binary
						OPTS="${OPTS:+$OPTS }--initramfs=none"
						OPTS="${OPTS:+$OPTS }--system=normal"
						OPTS="${OPTS:+$OPTS }--hdd-label=cloudimg-rootfs"
						OPTS="${OPTS:+$OPTS }--ext-resize-blocks=536870912 --ext-block-size=4096"
						OPTS="${OPTS:+$OPTS }--ext-fudge-factor=15"
						;;
					intel-iot)
						KERNEL_FLAVOURS='intel-iotg'
						OPTS="${OPTS:+$OPTS }--initramfs=none"
						OPTS="${OPTS:+$OPTS }--system=normal"
						OPTS="${OPTS:+$OPTS }--hdd-label=cloudimg-rootfs"
						OPTS="${OPTS:+$OPTS }--ext-resize-blocks=536870912 --ext-block-size=4096"
						OPTS="${OPTS:+$OPTS }--ext-fudge-factor=15"
						;;
					*)
						## Otherwise HYPERV image options.... *crickets* see the hyperv hook
						;;
				esac
				;;
			*)
				touch config/universe-enabled
				KERNEL_FLAVOURS='generic-hwe-22.04'
				if [ "$SUBARCH" = "x13s" ]; then
					KERNEL_FLAVOURS='laptop-23.10'
				fi
				PASSES_TO_LAYERS="true"
				# the minimal layer, for minimal installs
				add_task minimal minimal standard ubuntu-desktop-minimal ubuntu-desktop-minimal-default-languages
				add_package minimal cloud-init
				# the standard layer, contains all base common packages for later layers
				add_task minimal.standard ubuntu-desktop ubuntu-desktop-default-languages
				# the live layer, contains all packages for the live session installer
				add_task minimal.standard.live ubuntu-live
				remove_package minimal.standard.live ubiquity-frontend-gtk
				add_snap minimal.standard.live ubuntu-desktop-installer/classic
				add_package minimal.standard.live linux-$KERNEL_FLAVOURS casper
				# language support
				seeded_langs="$(get_seeded_languages desktop)"
				echo "$seeded_langs" | tr ' ' ',' > config/seeded-languages
				derive_language_layers minimal desktop-minimal desktop-minimal-default-languages "$seeded_langs"
				derive_language_layers minimal.standard desktop desktop-default-languages "$seeded_langs"

				# Enchanced secureboot stuff
				case "$ARCH" in
				    amd64)
					# the enhanced-secureboot layer, contains all packages for the enhanced secureboot install
					add_package minimal.enhanced-secureboot cryptsetup boot-managed-by-snapd
					add_package minimal.standard.enhanced-secureboot cryptsetup boot-managed-by-snapd
					derive_language_layers minimal.enhanced-secureboot desktop-minimal desktop-default-languages "$seeded_langs"
					derive_language_layers minimal.standard.enhanced-secureboot desktop desktop-default-languages "$seeded_langs"
					cat <<-EOF > config/minimal.enhanced-secureboot.catalog-in.yaml
						id: ubuntu-desktop-minimal
						variations:
						  minimal-enhanced-secureboot:
						    path: minimal.enhanced-secureboot.squashfs
						    snapd_system_label: enhanced-secureboot-desktop
					EOF
					cat <<-EOF > config/minimal.standard.enhanced-secureboot.catalog-in.yaml
						id: ubuntu-desktop
						variations:
						  enhanced-secureboot:
						    path: minimal.standard.enhanced-secureboot.squashfs
						    snapd_system_label: enhanced-secureboot-desktop
					EOF
					;;
				esac

				# now let's create the neccessary catalog files
				cat <<-EOF > config/minimal.catalog-in.yaml
					name: "Ubuntu Desktop (minimized)"
					description: >-
					  A minimal but usable Ubuntu Desktop.
					id: ubuntu-desktop-minimal
					type: fsimage-layered
					default: yes
					variant: desktop
					locale_support: langpack
					variations:
					  minimal:
					    path: minimal.squashfs
				EOF
				cat <<-EOF > config/minimal.standard.catalog-in.yaml
					name: "Ubuntu Desktop"
					description: >-
					  A full featured Ubuntu Desktop.
					id: ubuntu-desktop
					type: fsimage-layered
					variant: desktop
					locale_support: langpack
					variations:
					  standard:
					    path: minimal.standard.squashfs
				EOF
				/usr/share/livecd-rootfs/checkout-translations-branch \
					https://git.launchpad.net/subiquity po config/catalog-translations
				;;
		esac
		;;

	ubuntu-oem)
		touch config/universe-enabled
		PASSES_TO_LAYERS="true"
		#KERNEL_FLAVOURS='oem-22.04'
		KERNEL_FLAVOURS='generic-hwe-22.04'
		add_task minimal minimal standard ubuntu-desktop-minimal ubuntu-desktop-minimal-default-languages
		add_package minimal cloud-init
		add_task minimal.standard ubuntu-desktop ubuntu-desktop-default-languages
		add_task minimal.standard.live ubuntu-live
		remove_package minimal.standard.live ubiquity-frontend-gtk
		add_snap minimal.standard.live ubuntu-desktop-installer/classic
		add_package minimal.standard.live linux-$KERNEL_FLAVOURS casper

		cat <<-EOF > config/minimal.catalog-in.yaml
			name: "Ubuntu Desktop for OEM (minimal)"
			description: >-
			  Ubuntu Desktop (minimal) for OEM preinstallation.
			id: ubuntu-desktop-oem-minimal
			type: fsimage-layered
			variant: desktop
			locale_support: none
			default: yes
		EOF
		cat <<-EOF > config/minimal.standard.catalog-in.yaml
			name: "Ubuntu Desktop for OEM"
			description: >-
			  Ubuntu Desktop for OEM preinstallation.
			id: ubuntu-desktop-oem
			type: fsimage-layered
			variant: desktop
			locale_support: none
		EOF
		;;

	kubuntu)
		add_task install minimal standard
		add_task install kubuntu-desktop
		LIVE_TASK='kubuntu-live'
		add_chroot_hook remove-gnome-icon-cache
		;;

	edubuntu)
		add_task install minimal standard edubuntu-desktop-gnome
		LIVE_TASK='edubuntu-live'
		;;

	lubuntu|ubuntu-gnome|ubuntu-unity|ubuntucinnamon|ubuntukylin)
		add_task install minimal standard ${PROJECT}-desktop
		LIVE_TASK=${PROJECT}-live
		;;

	xubuntu)
		case ${SUBPROJECT:-} in
			minimal)
				add_task install minimal standard xubuntu-minimal
				;;
			*)
				add_task install minimal standard xubuntu-desktop
				;;
		esac
		LIVE_TASK='xubuntu-live'
		;;

	ubuntu-budgie)
		case ${SUBPROJECT:-} in
			legacy)
				add_task install minimal standard ubuntu-budgie-desktop
				LIVE_TASK='ubuntu-budgie-live'
				;;

			*)
				# By default Ubuntu Budgie now ships the new installer.
				touch config/universe-enabled
				PASSES_TO_LAYERS="true"
				KERNEL_FLAVOURS='generic-hwe-22.04'
				add_task minimal minimal standard ubuntu-budgie-desktop-minimal ubuntu-budgie-desktop-minimal-default-languages
				add_task minimal.standard ubuntu-budgie-desktop ubuntu-budgie-desktop-default-languages
				add_task minimal.standard.live ubuntu-budgie-live
				add_package minimal cloud-init
				remove_package minimal.standard.live ubiquity-frontend-gtk
				add_snap minimal.standard.live ubuntu-budgie-installer/classic
				add_package minimal.standard.live linux-$KERNEL_FLAVOURS casper

				seeded_langs="$(get_seeded_languages budgie-desktop-minimal budgie-desktop)"
				echo "$seeded_langs" | tr ' ' ',' > config/seeded-languages
				derive_language_layers minimal budgie-desktop-minimal budgie-desktop-minimal-default-languages "$seeded_langs"
				derive_language_layers minimal.standard budgie-desktop budgie-desktop-default-languages "$seeded_langs"
				cat <<-EOF > config/minimal.catalog-in.yaml
					name: "Ubuntu Budgie Desktop (minimized)"
					description: >-
					  A minimal but usable Ubuntu Budgie Desktop.
					id: ubuntu-budgie-desktop-minimal
					type: fsimage-layered
					variant: desktop
					locale_support: langpack
				EOF
				cat <<-EOF > config/minimal.standard.catalog-in.yaml
					name: "Ubuntu Budgie Desktop"
					description: >-
					  A full featured Ubuntu Budgie Desktop.
					id: ubuntu-budgie-desktop
					type: fsimage-layered
					variant: desktop
					locale_support: langpack
					default: yes
				EOF
				/usr/share/livecd-rootfs/checkout-translations-branch \
					https://git.launchpad.net/subiquity po config/catalog-translations
				;;
		esac
		;;

	ubuntu-mate)
		add_task install minimal standard ubuntu-mate-core ubuntu-mate-desktop
		LIVE_TASK='ubuntu-mate-live'
		;;

	ubuntustudio-dvd)
		add_task install minimal standard ubuntustudio-desktop ubuntustudio-audio ubuntustudio-graphics ubuntustudio-video ubuntustudio-photography
		KERNEL_FLAVOURS=lowlatency
		;;

	ubuntu-server)
		case ${SUBPROJECT:-} in
			live)
				OPTS="${OPTS:+$OPTS }--bootstrap-flavour=minimal"
				PASSES_TO_LAYERS=true
				add_task ubuntu-server-minimal server-minimal
				add_package ubuntu-server-minimal lxd-installer
				add_task ubuntu-server-minimal.ubuntu-server minimal standard server
				add_package ubuntu-server-minimal.ubuntu-server cloud-init

				add_task ubuntu-server-minimal.ubuntu-server.installer server-live

				# Live server ISOs for LTS point releases past .2 offer both
				# the GA and HWE kernels (in separate layers) so this code is
				# written generically to support both even though a lot of the
				# time only one kernel is offered.
				case ${SUBARCH:-} in
					intel-iot)
						variants='intel'
						;;
					tegra)
						variants='tegra'
						;;
					tegra-igx)
						variants='tegra-igx'
						;;
					*)
						# variants='ga hwe'
						variants='ga'
						;;
				esac

				for variant in $variants; do
					if [ "$variant" = "ga" ]; then
						kernel_metapkg=linux-generic
						flavor=generic
					elif [ "$variant" = "hwe" ]; then
						kernel_metapkg=linux-generic-hwe-$(lsb_release -sr)
						flavor=generic-hwe
					elif [ "$variant" = "intel" ]; then
						kernel_metapkg=linux-intel-iotg
						flavor=intel-iotg
					elif [ "$variant" = "tegra" ]; then
						kernel_metapkg=linux-nvidia-tegra
						flavor=nvidia-tegra
					elif [ "$variant" = "tegra-igx" ]; then
						kernel_metapkg=linux-nvidia-tegra-igx
						flavor=nvidia-tegra-igx
					else
						echo "bogus variant: $variant"
						exit 1
					fi

					add_package ubuntu-server-minimal.ubuntu-server.installer.$flavor $kernel_metapkg
					LIVE_PASSES="${LIVE_PASSES:+$LIVE_PASSES }ubuntu-server-minimal.ubuntu-server.installer.$flavor"
				done
				case $ARCH in
					amd64)
						add_package ubuntu-server-minimal.ubuntu-server.installer.generic.netboot grub-pc shim-signed pxelinux
						;;
					arm64)
						add_package ubuntu-server-minimal.ubuntu-server.installer.generic.netboot shim-signed
						;;
					*)
						add_package ubuntu-server-minimal.ubuntu-server.installer.generic.netboot
						;;
				esac
				NO_SQUASHFS_PASSES=ubuntu-server-minimal.ubuntu-server.installer.generic.netboot

				/usr/share/livecd-rootfs/checkout-translations-branch \
					https://git.launchpad.net/subiquity po config/catalog-translations
				;;
			*)
				echo "unrecognized subproject for server: '$SUBPROJECT'"
				exit 1
				;;
		esac
		PREINSTALL_POOL_SEEDS='server-ship'
		;;

	ubuntu-mini-iso)
		OPTS="${OPTS:+$OPTS }--bootstrap-flavour=minimal"

		OPTS="${OPTS:+$OPTS }--linux-packages=none --initramfs=none"
		KERNEL_FLAVOURS=none
		BINARY_REMOVE_LINUX=false

		add_package install mini-iso-tools openssl ca-certificates isc-dhcp-client linux-generic
		case $ARCH in
			amd64)
				add_package install cd-boot-images-amd64
				;;
			*)
				echo "unexpected architecture for $PROJECT: '$ARCH'"
				exit 1
				;;
		esac
		;;

	ubuntu-base|ubuntu-oci)
		OPTS="${OPTS:+$OPTS }--bootstrap-flavour=minimal"
		;;

	ubuntu-wsl)
		add_task install minimal ubuntu-wsl
		OPTS="${OPTS:+$OPTS }--linux-packages=none --initramfs=none"
		KERNEL_FLAVOURS=none
		BINARY_REMOVE_LINUX=false
		;;

	ubuntu-cpc)
		KERNEL_FLAVOURS=virtual

		if [ "${SUBPROJECT:-}" = minimized ]; then
		    # For minimized images we do not want to install any recommended packages.
		    # We can do this by setting APT::Install-Recommends to false in apt config
		    # or by passing --no-install-recommends to apt-get install.
		    # Apt config is set using `APT_OPTIONS` variable in this script.
		    # This fixes LP: #2031640
		    #
		    # We're also installing python3-systemd for now because it's needed by
		    # ubuntu-advantage-tools. This will eventually be dropped in the next
		    # release of u-a-t. This is being discussed and tracked at
		    # https://github.com/canonical/ubuntu-pro-client/issues/2692.
		    # Once python3-systemd is dropped from u-a-t, we can remove it
		    # from here, too.
		    APT_OPTIONS="${APT_OPTIONS:+$APT_OPTIONS }--no-install-recommends"
			add_package install ubuntu-cloud-minimal python3-systemd
		else
			add_task install minimal standard cloud-image
			add_package install ubuntu-minimal
		        case $ARCH in
				armhf|arm64|ppc64el|powerpc)
					add_task install server
					;;
			esac
		fi

		BINARY_REMOVE_LINUX=false
		OPTS="${OPTS:+$OPTS }--initramfs=none"
		case "$ARCH+${SUBARCH:-}" in
			*+raspi)
				add_task install ubuntu-server-raspi
				;;
			arm64*)
				if [ "${SUBARCH:-}" = "generic" ]; then
					KERNEL_FLAVOURS=generic
				fi
				;;
			amd64*)
				if [ "${SUBARCH:-}" = "generic" ]; then
					KERNEL_FLAVOURS=generic
				elif [ "${SUBARCH:-}" = "intel-iot" ]; then
					KERNEL_FLAVOURS=intel-iotg
					OPTS="${OPTS:+$OPTS }--initramfs=none"
				fi
				;;
			riscv64*)
				if [ -n "$SUBARCH" ]; then
					case "${SUBARCH:-}" in
						nezha|licheerv)
							KERNEL_FLAVOURS=allwinner
							;;
						visionfive)
							KERNEL_FLAVOURS=starfive
							;;
						*)
							KERNEL_FLAVOURS=generic
							;;
					esac
				fi
				;;
		esac
		OPTS="${OPTS:+$OPTS }--system=normal"
		OPTS="${OPTS:+$OPTS }--hdd-label=cloudimg-rootfs"
		OPTS="${OPTS:+$OPTS }--ext-resize-blocks=536870912 --ext-block-size=4096"
		OPTS="${OPTS:+$OPTS }--ext-fudge-factor=15"
		;;

	*)
		echo "unknown project $PROJECT" >&2
		exit 2
		;;
esac

case $SUBPROJECT in
	buildd)
		OPTS="${OPTS:+$OPTS }--archive-areas main"
		OPTS="${OPTS:+$OPTS }--apt-recommends false"
		OPTS="${OPTS:+$OPTS }--apt-secure false"
		OPTS="${OPTS:+$OPTS }--parent-mirror-binary ${MIRROR}"
		# XXX cjwatson 2018-04-27: We need to work out how to make
		# this conditional so that we can do things like building
		# buildd chroots with -updates.  This probably involves
		# either extending the PROPOSED hack or fixing the strange
		# way that SUITE is in fact a series; in either case it's
		# likely to involve work both here and in launchpad-buildd.
		OPTS="${OPTS:+$OPTS }--security false --volatile false"

		add_package install adduser
		add_package install pkgbinarymangler
		add_package install ca-certificates
		add_package install gpg
		add_package install gpg-agent
		add_package install fakeroot
		add_package install build-essential
		# Needed for LXD-based builds.
		add_package install init
		# Not strictly build-essential, but traditionally present
		# and a variety of things fail without it.
		add_package install tzdata

		cp -af /usr/share/livecd-rootfs/live-build/make-lxd-metadata.py config/make-lxd-metadata
		;;
esac

# we'll expand the base seed given here according to the STRUCTURE file, and
# then look in all of the seeds found to see which snaps are seeded
case $PROJECT:${SUBPROJECT:-} in
	ubuntu-wsl:*)
		BASE_SEED='wsl'
		;;
	ubuntu-cpc:*)
		# we don't preseed any snaps in minimized images, so no need to set
		# BASE_SEED in that case.
		if [ "${SUBPROJECT:-}" != minimized ]; then
			BASE_SEED='server'
		fi
		;;
	ubuntu-server:live)
		BASE_SEED='server'
		;;
	ubuntu-base:*|ubuntu-core:*|ubuntu-mini-iso:|ubuntu-oci:*|\
        xubuntu:minimal)
		;;
        edubuntu:*)
		BASE_SEED='desktop-gnome'
		;;
	*)
		BASE_SEED='desktop'
		;;
esac

if [ "$PROJECT:${SUBPROJECT:-}" = ubuntu-cpc:minimized ]; then
	# We install a lxc script that installs the snap when invoked and
	# don't want any other snaps.
	if [ -s config/seeded-snaps ]; then
		echo "Unexpected seeded snaps for ubuntu-cpc:minimized build:"
		cat config/seeded-snaps
		exit 1
	fi

	# Create an empty file to trigger initialization of assertions.
	truncate --size 0 config/seeded-snaps
fi

# grab a list of packags to remove for a "minimal" installation from the seed
# mirror for this project
if [ -n "${BASE_SEED}" ]; then
	minimal_packages_url=${SEEDMIRROR}/${SEED}/${BASE_SEED}.minimal-remove
	echo -n "Checking ${minimal_packages_url} for a minimal installation list... "
	minimal_packages_remove=$(wget -q -O- ${minimal_packages_url} | sed -e '/\s*#.*$/d' -e '/^\s*$/d')
	if [ -n "${minimal_packages_remove}" ]; then
		echo "${minimal_packages_remove}" > config/manifest-minimal-remove
		echo "$(echo ${minimal_packages_remove} | tr '\n' ' ')"
	else
		echo "failed to retrieve, not including."
	fi
fi

export APT_OPTIONS

if [ "$PREINSTALLED" != "true" ] && [ "$PASSES_TO_LAYERS" != "true" ] && [ "$LIVE_TASK" ]; then
	add_task live "$LIVE_TASK"
fi

case $PROJECT in
	*-dvd)
		add_task live "$PROJECT-live"
		;;
esac

case "$ARCH${SUBARCH:++$SUBARCH}" in
	arm*+raspi)
		# Common configuration for all Raspberry Pi image variants (server,
		# desktop etc.)
		KERNEL_FLAVOURS="$SUBARCH"
		# Most Pi-specific package installation is handled via the seeds in the
		# per-project/subproject cases above
		add_package install linux-firmware-raspi pi-bluetooth u-boot-rpi u-boot-tools
		BINARY_REMOVE_LINUX=false
		;;
	arm64+tegra|arm64+tegra-igx)
		# Common configuration for all NVIDIA Tegra image variants
		# (server, desktop etc.)
		KERNEL_FLAVOURS="nvidia-$SUBARCH"
		;;
	riscv*+*)
		if [ "${SUBARCH:-}" = "licheerv" ]; then
			# The wifi driver of the licheerv is an out-of-tree driver packaged
			# in universe for now, so to ease its installation for those without
			# network, install its dependencies.
			add_package install dkms
		fi
		# We'll add wpasupplicant to the seeds when we work on RISC-V seeds.
		add_package install wpasupplicant
		;;
esac

case $PROJECT:${SUBPROJECT:-} in
	ubuntu-server:*|ubuntu-base:*|ubuntu-oci:*)
		OPTS="${OPTS:+$OPTS }--linux-packages=none --initramfs=none"
		KERNEL_FLAVOURS=none
		BINARY_REMOVE_LINUX=false
		;;
esac

add_chroot_hook update-apt-file-cache
add_chroot_hook update-apt-xapian-index
add_chroot_hook update-mlocate-database
add_chroot_hook remove-dbus-machine-id
add_chroot_hook remove-openssh-server-host-keys
add_chroot_hook remove-udev-persistent-rules

case $PROJECT in
	# if any flavours want to strip .pyc files from their live images, add them here
	_)
		add_chroot_hook remove-python-py
		;;
esac

lb config noauto \
	--mode ubuntu \
	--distribution "$SUITE" \
	--iso-preparer "livecd-rootfs" \
	--bootstrap-keyring ubuntu-keyring \
	--binary-images "$BINARY_IMAGES" \
	--memtest "$MEMTEST" \
	$SOURCE \
	--build-with-chroot false \
	${MIRROR:+--parent-mirror-bootstrap $MIRROR} \
	${COMPONENTS:+--parent-archive-areas "$COMPONENTS"} \
	--apt-source-archives false \
	${KERNEL_FLAVOURS:+--linux-flavours "$KERNEL_FLAVOURS"} \
	--initsystem none \
	--bootloader "$BOOTLOADER" \
	${INITRAMFS_COMPRESSION:+--initramfs-compression "$INITRAMFS_COMPRESSION"} \
	--checksums none \
	--cache false \
	${BOOTAPPEND_LIVE:+--bootappend-live "$BOOTAPPEND_LIVE"} \
	$OPTS \
	"$@"

PASSES=$(_sanitize_passes "$PASSES")
LIVE_PASSES=${LIVE_PASSES:-$(_get_live_passes "$PASSES")}

if [ -n "$PASSES" ] && [ -z "$LIVE_PASSES" ]; then
	echo "W: Multi-layered mode is enabled, but we didn't find any live pass." \
	     "Either set \$LIVE_PASSES or add a pass ending with '.live'."
fi

echo "LB_CHROOT_HOOKS=\"$CHROOT_HOOKS\"" >> config/chroot
echo "SUBPROJECT=\"${SUBPROJECT:-}\"" >> config/chroot
echo "LB_DISTRIBUTION=\"$SUITE\"" >> config/chroot
echo "IMAGEFORMAT=\"$IMAGEFORMAT\"" >> config/chroot
if [ -n "$PASSES" ]; then
	echo "PASSES=\"$PASSES\"" >> config/common
fi
if [ -n "$NO_SQUASHFS_PASSES" ]; then
    echo "NO_SQUASHFS_PASSES=\"$NO_SQUASHFS_PASSES\"" >> config/common
fi
if [ -n "$LIVE_PASSES" ]; then
	echo "LIVE_PASSES=\"$LIVE_PASSES\"" >> config/common
fi
echo "LB_BINARY_HOOKS=\"$BINARY_HOOKS\"" >> config/binary
echo "BUILDSTAMP=\"$NOW\"" >> config/binary
echo "SUBPROJECT=\"${SUBPROJECT:-}\"" >> config/binary
echo "LB_DISTRIBUTION=\"$SUITE\"" >> config/binary
echo "CHANNEL=\"${CHANNEL:-}\"" >> config/binary

if [ "${IMAGE_HAS_HARDCODED_PASSWORD:-}" = "1" ]; then
	echo IMAGE_HAS_HARDCODED_PASSWORD=1 >> config/binary
	if [ -n "${IMAGE_TARGETS:-}" ]; then
		echo "IMAGE_TARGETS=\"${IMAGE_TARGETS:-}\"" >> config/binary
	fi
fi

# apply this hook unconditionally to remove files from the chroot that
# are supposed to be install-specific secrets and therefore must never
# be shipped in any image.
# this hook should be extended if we discover any more files that are
# supposed to be private but aren't.
cat > config/hooks/100-too-many-secrets.chroot <<EOF
#!/bin/sh

rm -fv /etc/ssl/private/ssl-cert-snakeoil.key \
	/etc/ssl/certs/ssl-cert-snakeoil.pem
EOF

case $PROJECT in
  ubuntu-cpc|ubuntu-core|ubuntu-base|ubuntu-oci|ubuntu-wsl|ubuntu-mini-iso)
    # ubuntu-cpc gets this added in 025-create-groups.chroot, and we do
    # not want this group in projects that are effectively just chroots
    ;;
  *)
    # We add the lxd group at image build time so that the default user
    # created by the installer or cloud-init is added to it (cloud-init
    # will create any group the user is configured to be added to, but as
    # a normal group not a system group, see
    # https://bugs.launchpad.net/cloud-images/+bug/1844498).
    cat > config/hooks/100-add-lxd-group.chroot <<EOF
#!/bin/bash

echo "Adding lxd group..."
addgroup --system --quiet lxd
EOF
    ;;
esac

case "$ARCH+${SUBARCH:-}" in
	*+raspi)
		cat > config/hooks/01-firmware-directory.chroot_early <<EOF
#!/bin/sh -ex
mkdir -p /boot/firmware
EOF
		cat > config/hooks/999-raspi-fixes.chroot <<EOF
#!/bin/sh -ex
cat >> /etc/fstab << EOM
LABEL=system-boot       /boot/firmware  vfat    defaults        0       1
EOM
EOF
		;;
	*)
		;;
esac

if [ $PROJECT != ubuntu-cpc ]; then
	cat > config/hooks/100-preserve-apt-prefs.chroot <<\EOF
#! /bin/sh -ex

# live-build "helpfully" removes /etc/apt/preferences.d/* so we put a
# copy somewhere it won't touch it.

if [ -n "$(ls -A /etc/apt/preferences.d)" ]; then
    cp -a /etc/apt/preferences.d /etc/apt/preferences.d.save
fi
EOF
fi

if [ $PROJECT = ubuntukylin ]; then
	cat > config/hooks/100-ubuntukylin.chroot <<EOF
#! /bin/sh
set -e
HOOK=/usr/share/ubuntukylin-default-settings/hooks/chroot
if [ -x \$HOOK ]; then
	exec \$HOOK
fi
exit 0
EOF
fi

if $BINARY_REMOVE_LINUX; then
	cat > config/binary_rootfs/excludes << EOF
boot/vmlinu?-*
boot/initrd.img-*
EOF
fi

if [ "$PROPOSED" ]; then
	. config/bootstrap

	cat > config/archives/proposed.list.chroot << EOF
deb $LB_PARENT_MIRROR_BINARY_VOLATILE $SUITE-proposed $LB_PARENT_ARCHIVE_AREAS
EOF
	cp -a config/archives/proposed.list.chroot \
	      config/archives/proposed.list.binary

	mkdir -p config/chroot_apt/
	cat > config/chroot_apt/proposed.pref <<EOF
# override for NotAutomatic: yes
Package: *
Pin: release a=*-proposed
Pin-Priority: 500
EOF
fi

case $PROJECT:${SUBPROJECT:-} in
	*-dvd:*)
		. config/bootstrap

		cat > config/archives/dvd.list.binary << EOF
deb $LB_PARENT_MIRROR_BINARY $SUITE universe multiverse
deb $LB_PARENT_MIRROR_BINARY_VOLATILE $SUITE-updates universe multiverse
deb $LB_PARENT_MIRROR_BINARY_SECURITY $SUITE-security universe multiverse
EOF
		if [ "$PROPOSED" ]; then
			cat >> config/archives/dvd.list.binary << EOF
deb $LB_PARENT_MIRROR_BINARY_VOLATILE $SUITE-proposed universe multiverse
EOF
		fi
		;;

	ubuntu-cpc:*|ubuntu-server:live|ubuntu:desktop-preinstalled| \
		ubuntu-wsl:*|ubuntu-mini-iso:*|ubuntu:|ubuntu-oem:*)
		# Ensure that most things e.g. includes.chroot are copied as is
		for entry in /usr/share/livecd-rootfs/live-build/${PROJECT}/*; do
			case $entry in
				*hooks*)
					# But hooks are shared across the projects with symlinks
					# dereference them
					cp -afL $entry config/
					;;
				*)
					# Most places want to preserve symlinks as is
					cp -af $entry config/
					;;
			esac
		done

		if [ "$PROJECT" = "ubuntu-cpc" ] || [ "$PROJECT" = "ubuntu-oem" ] ; then
			case ${IMAGE_TARGETS:-} in
				"")
					config/hooks.d/make-hooks --hooks-dir config/hooks all
					;;
				*)
					config/hooks.d/make-hooks --hooks-dir config/hooks \
						"$IMAGE_TARGETS"
					;;
			esac
		fi

		if [ "$IMAGEFORMAT" = none ]; then
			rm -f config/hooks/*.binary*
		fi
		;;
esac

case $SUBPROJECT in
	buildd)
		cp -af /usr/share/livecd-rootfs/live-build/buildd/* config/
		;;
esac

if [ "$EXTRA_PPAS" ]; then
	rm -f config/archives/extra-ppas.list.chroot \
	      config/archives/extra-ppas.pref.chroot \
	      config/archives/extra-ppas.key.chroot
	gpg_tmpdir="$(mktemp -d)"
	run_gpg () {
		gpg --no-default-keyring --no-options --homedir "$gpg_tmpdir" \
			--secret-keyring "$gpg_tmpdir/secring.gpg" \
			--keyserver hkp://keyserver.ubuntu.com:80/ \
			"$@"
	}
	for extra_ppa in $EXTRA_PPAS; do
		extra_ppa_pin=''
		extra_ppa_origin=''
		case $extra_ppa in
		    *:*)
			extra_ppa_pin=${extra_ppa#*:}
			extra_ppa=${extra_ppa%:*}
			;;
		esac
		extra_ppa_fingerprint="$(/usr/share/livecd-rootfs/get-ppa-fingerprint "$extra_ppa")"

		cat >> config/archives/extra-ppas.list.chroot <<EOF
deb http://ppa.launchpad.net/$extra_ppa/ubuntu @DISTRIBUTION@ main
deb-src http://ppa.launchpad.net/$extra_ppa/ubuntu @DISTRIBUTION@ main
EOF

		if [ -n "$extra_ppa_pin" ]; then
		    extra_ppa_origin="LP-PPA-$(echo $extra_ppa | sed -e 's,/ppa$,,' -e 's,/,-,')"
		    echo "Package: *" >> config/archives/extra-ppas.pref.chroot
		    echo "Pin: release o=$extra_ppa_origin" >> config/archives/extra-ppas.pref.chroot
		    echo "Pin-Priority: $extra_ppa_pin" >> config/archives/extra-ppas.pref.chroot
		    echo "" >> config/archives/extra-ppas.pref.chroot
		fi
		run_gpg --keyring "$gpg_tmpdir/pubring.gpg" \
			--recv "$extra_ppa_fingerprint"
		run_gpg --keyring "$gpg_tmpdir/pubring.gpg" \
			--output "$gpg_tmpdir/export.gpg" \
			--export "$extra_ppa_fingerprint"
		got_fingerprint="$(
			run_gpg --keyring "$gpg_tmpdir/export.gpg" \
				--fingerprint --batch --with-colons |
			grep '^fpr:' | cut -d: -f10)"
		if [ "$got_fingerprint" != "$extra_ppa_fingerprint" ]; then
			echo "Fingerprints do not match.  Got:" >&2
			echo "$got_fingerprint" | sed 's/^/  /' >&2
			echo "Expected:" >&2
			echo "  $extra_ppa_fingerprint" >&2
			exit 1
		fi
		cat "$gpg_tmpdir/export.gpg" >> config/archives/extra-ppas.key.chroot
		rm -f "$gpg_tmpdir/export.gpg"
	done
	rm -rf "$gpg_tmpdir"
	cp -a config/archives/extra-ppas.list.chroot \
	      config/archives/extra-ppas.list.binary
	cp -a config/archives/extra-ppas.key.chroot \
	      config/archives/extra-ppas.key.binary
	if [ -f config/archives/extra-ppas.pref.chroot ]; then
		cp -a config/archives/extra-ppas.pref.chroot \
		      config/archives/extra-ppas.pref.binary
	fi
fi

if [ "$PREINSTALLED" = "true" ]; then
	if [ -n "$PREINSTALL_POOL_SEEDS" ]; then
		UNWANTED_SEEDS="${LIVE_TASK:+$LIVE_TASK }boot installer required"
		for i in $UNWANTED_SEEDS; do
			UNWANTED_SEEDS="${UNWANTED_SEEDS:+$UNWANTED_SEEDS }$(inheritance $i)"
		done

		for i in $PREINSTALL_POOL_SEEDS; do
			PREINSTALL_POOL_SEEDS="${PREINSTALL_POOL_SEEDS:+$PREINSTALL_POOL_SEEDS }$(inheritance $i)"
		done

		for i in $PREINSTALL_POOL_SEEDS; do
			case " $UNWANTED_SEEDS " in
				*" $i "*)
					;;
				*)
					PPS_EXP="${PPS_EXP:+$PPS_EXP }$i"
					;;
			esac
		done

		for i in $PPS_EXP; do
			PREINSTALL_POOL="$PREINSTALL_POOL $(awk '{print $1}' \
			config/germinate-output/$i | egrep -v '^-|^Package|^\|' | tr '\n' ' ')"
		done
	fi
	if [ -n "$PREINSTALL_POOL" ]; then
		mkdir -p config/gnupg
		mkdir -p config/indices
		for component in $COMPONENTS; do
			(cd config/indices && \
		 	 wget $MIRROR/indices/override.$SUITE.$component && \
			 wget $MIRROR/indices/override.$SUITE.extra.$component \
			)
		done
		cat > config/hooks/100-preinstall-pool.chroot <<EOF
#! /bin/sh
mkdir -p /var/lib/preinstalled-pool/pool/
cd /var/lib/preinstalled-pool/pool/
apt-get -y download $PREINSTALL_POOL
EOF
	fi
fi