#! /bin/sh
set -e

export LC_ALL=C

( . "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || true ) || . /usr/lib/live/build.sh

Arguments "${@}"

Read_conffiles config/all config/common config/bootstrap config/chroot config/binary config/source
Set_defaults

if [ -z "${PROJECT:-}" ]; then
    echo "PROJECT environment variable has to be set" >&2
    exit 1
fi

. config/functions

# New nf_tables-based versions of iptables don't work well on old kernels.
# We aren't sure exactly how old is a problem: 4.15 works, but with 4.4 new
# rules are added to all chains in the requested table rather than just one,
# and the new rules seem to have no useful effect.  In such cases,
# iptables-legacy works better.
#
# We can simplify this once livecd-rootfs no longer needs to support running
# on Ubuntu 16.04 (that is, once Launchpad's build VMs are upgraded to
# Ubuntu 18.04).
run_iptables () {
    local kver kver_major kver_minor

    kver="$(uname -r)"
    kver="${kver%%-*}"
    kver_major="${kver%%.*}"
    kver="${kver#*.}"
    kver_minor="${kver%%.*}"

    if [ "$kver_major" -lt 4 ] || \
       ([ "$kver_major" = 4 ] && [ "$kver_minor" -lt 15 ]); then
        iptables-legacy "$@"
    else
        iptables "$@"
    fi
}

if [ -n "$REPO_SNAPSHOT_STAMP" ]; then
    if [ "`whoami`" != "root" ]; then
        echo "Magic repo snapshots only work when running as root." >&2
        exit 1
    fi

    apt-get -qyy install iptables

    # Redirect all outgoing traffic to port 80 to proxy instead.
    run_iptables -t nat -A OUTPUT -p tcp --dport 80 \
        -m owner ! --uid-owner daemon -j REDIRECT --to 8080

    # Run proxy as "daemon" to avoid infinite loop.
    /usr/share/livecd-rootfs/magic-proxy \
        --address="127.0.0.1" \
        --port=8080 \
        --run-as=daemon \
        --cutoff-time="$REPO_SNAPSHOT_STAMP" \
        --log-file=/build/livecd.magic-proxy.log \
        --pid-file=config/magic-proxy.pid \
        --background \
        --setsid
fi

# Link output files somewhere launchpad-buildd will be able to find them.
PREFIX="livecd.$PROJECT${SUBARCH:+-$SUBARCH}"

if [ "${IMAGEFORMAT:-}" = "ubuntu-image" ]; then
	# Use ubuntu-image instead of live-build

	if [ "$PROJECT" = "ubuntu-core" ]; then
		CHANNEL="${CHANNEL:-edge}"
		env SNAPPY_STORE_NO_CDN=1 \
		ubuntu-image snap -c "$CHANNEL" $UBUNTU_IMAGE_ARGS \
			-O output "$PREFIX".model-assertion
		# XXX: currently we only have one image generated, but really
		#  we should be supporting more than one for models that
		#  define those.
		mv output/*.img "$PREFIX".img
		xz -0 -T4 "$PREFIX".img
		mv output/seed.manifest "$PREFIX".manifest
	else
		# First we need to build the gadget tree
		make -C "config/$PREFIX-gadget" ARCH=$ARCH SERIES=$SUITE
		ubuntu-image classic $UBUNTU_IMAGE_ARGS \
			-s $SUITE -p $PROJECT -a $ARCH --subarch $SUBARCH \
			-O output config/$PREFIX-gadget/install
		# XXX: currently we only have one image generated, but really
		#  we should be supporting more than one for models that
		#  define those.
		mv output/*.img "$PREFIX".img
		xz -0 -T4 "$PREFIX".img
		# Also link the output image to a filename that cdimage expects
		ln "$PREFIX".img.xz livecd.ubuntu-cpc.disk1.img.xz
		mv output/filesystem.manifest "$PREFIX".manifest
	fi

	exit 0
fi

# Setup cleanup function
Setup_cleanup

preinstall_snaps() {
	lb chroot_resolv install
	snap_prepare chroot

	for snap in "$@"; do
		SNAP_NO_VALIDATE_SEED=1 snap_preseed chroot "${snap}"
	done
	snap_validate_seed chroot
	lb chroot_resolv remove
}

rm -f binary.success
(
	if [ -d config/gnupg ]; then
		cat << @@EOF > config/gnupg/NEWKEY
Key-Type: DSA
Key-Length: 1024
Key-Usage: sign
Name-Real: Ubuntu Local Archive One-Time Signing Key
Name-Email: cdimage@ubuntu.com
Expire-Date: 0
@@EOF
		gpg --home config/gnupg --gen-key --batch < config/gnupg/NEWKEY \
			> config/gnupg/generate.log 2>&1 &
		GPG_PROCESS=$!
	fi

	lb bootstrap "$@"

        case $PROJECT:${SUBPROJECT:-} in
		ubuntu-server:*|ubuntu-cpc:*|ubuntu:desktop-preinstalled)
			# Set locale to C.UTF-8 by default. We should
			# probably do this for all images early in the
			# 18.10 cycle but for now just do it for
			# server and cpc products.
			echo "LANG=C.UTF-8" > chroot/etc/default/locale
			;;
	esac

	if [ "${SUBPROJECT:-}" = minimized ] \
	   && ! Chroot chroot dpkg -l tzdata 2>&1 |grep -q ^ii; then
		# workaround for tzdata purge not removing these files
		rm -f chroot/etc/localtime chroot/etc/timezone
	fi

	if [ "${SUBPROJECT:-}" = minimized ]; then
		# set up dpkg filters to skip installing docs on minimized system
		mkdir -p chroot/etc/dpkg/dpkg.cfg.d
		cat > chroot/etc/dpkg/dpkg.cfg.d/excludes <<EOF
# Drop all man pages
path-exclude=/usr/share/man/*

# Drop all translations
path-exclude=/usr/share/locale/*/LC_MESSAGES/*.mo

# Drop all documentation ...
path-exclude=/usr/share/doc/*

# ... except copyright files ...
path-include=/usr/share/doc/*/copyright

# ... and Debian changelogs
path-include=/usr/share/doc/*/changelog.Debian.*
EOF

		# Remove docs installed by bootstrap
		Chroot chroot dpkg-query -f '${binary:Package}\n' -W | Chroot chroot xargs apt-get install --reinstall

                # Add unminimizer script which restores default image behavior
                mkdir -p chroot/usr/local/sbin
                cat > chroot/usr/local/sbin/unminimize <<'EOF'
#!/bin/sh

set -e

echo "This system has been minimized by removing packages and content that are"
echo "not required on a system that users do not log into."
echo ""
echo "This script restores content and packages that are found on a default"
echo "Ubuntu server system in order to make this system more suitable for"
echo "interactive use."
echo ""
echo "Reinstallation of packages may fail due to changes to the system"
echo "configuration, the presence of third-party packages, or for other"
echo "reasons."
echo ""
echo "This operation may take some time."
echo ""
read -p "Would you like to continue? [y/N] " REPLY
echo    # (optional) move to a new line
if [ "$REPLY" != "y" ] && [ "$REPLY" != "Y" ]
then
    exit 1
fi

if [ -f /etc/dpkg/dpkg.cfg.d/excludes ] || [ -f /etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp ]; then
    echo "Re-enabling installation of all documentation in dpkg..."
    if [ -f /etc/dpkg/dpkg.cfg.d/excludes ]; then
        mv /etc/dpkg/dpkg.cfg.d/excludes /etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp
    fi
    echo "Updating package list and upgrading packages..."
    apt-get update
    # apt-get upgrade asks for confirmation before upgrading packages to let the user stop here
    apt-get upgrade
    echo "Restoring system documentation..."
    echo "Reinstalling packages with files in /usr/share/man/ ..."
    # Reinstallation takes place in two steps because a single dpkg --verified
    # command generates very long parameter list for "xargs dpkg -S" and may go
    # over ARG_MAX. Since many packages have man pages the second download
    # handles a much smaller amount of packages.
    dpkg -S /usr/share/man/ |sed 's|, |\n|g;s|: [^:]*$||' | DEBIAN_FRONTEND=noninteractive xargs apt-get install --reinstall -y
    echo "Reinstalling packages with system documentation in /usr/share/doc/ .."
    # This step processes the packages which still have missing documentation
    dpkg --verify --verify-format rpm | awk '/..5......   \/usr\/share\/doc/ {print $2}' | sed 's|/[^/]*$||' | sort |uniq \
         | xargs dpkg -S | sed 's|, |\n|g;s|: [^:]*$||' | uniq | DEBIAN_FRONTEND=noninteractive xargs apt-get install --reinstall -y
    echo "Restoring system translations..."
    # This step processes the packages which still have missing translations
    dpkg --verify --verify-format rpm | awk '/..5......   \/usr\/share\/locale/ {print $2}' | sed 's|/[^/]*$||' | sort |uniq \
         | xargs dpkg -S | sed 's|, |\n|g;s|: [^:]*$||' | uniq | DEBIAN_FRONTEND=noninteractive xargs apt-get install --reinstall -y
    if dpkg --verify --verify-format rpm | awk '/..5......   \/usr\/share\/doc/ {exit 1}'; then
        echo "Documentation has been restored successfully."
        rm /etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp
    else
        echo "There are still files missing from /usr/share/doc/:"
        dpkg --verify --verify-format rpm | awk '/..5......   \/usr\/share\/doc/ {print " " $2}'
        echo "You may want to try running this script again or you can remove"
        echo "/etc/dpkg/dpkg.cfg.d/excludes.dpkg-tmp and restore the files manually."
    fi
fi

if  [ "$(dpkg-divert --truename /usr/bin/man)" = "/usr/bin/man.REAL" ]; then
    # Remove diverted man binary
    rm -f /usr/bin/man
    dpkg-divert --quiet --remove --rename /usr/bin/man
fi
EOF

                if [ "$PROJECT" != "ubuntu-base" ]; then
                    	# ubuntu-minimal is too much for a docker container (it contains
                    	# systemd and other things)
	                cat >> chroot/usr/local/sbin/unminimize <<'EOF'

if ! dpkg-query --show --showformat='${db:Status-Status}\n' ubuntu-minimal 2> /dev/null | grep -q '^installed$'; then
    echo "Installing ubuntu-minimal package to provide the familiar Ubuntu minimal system..."
    DEBIAN_FRONTEND=noninteractive apt-get install -y ubuntu-minimal ubuntu-standard
fi

if dpkg-query --show --showformat='${db:Status-Status}\n' ubuntu-server 2> /dev/null | grep -q '^installed$' \
   && ! dpkg-query --show --showformat='${db:Status-Status}\n' landscape-common 2> /dev/null | grep -q '^installed$'; then
    echo "Installing ubuntu-server recommends..."
    DEBIAN_FRONTEND=noninteractive apt-get install -y landscape-common
fi
EOF
fi
		if [ "$PROJECT" = "ubuntu-cpc" ]; then
			cat >> chroot/usr/local/sbin/unminimize <<'EOF'

echo "Removing lxd installer package..."
apt-get purge -y lxd-installer

echo "Installing lxd from snap..."
snap install lxd
EOF
		fi
		cat >> chroot/usr/local/sbin/unminimize <<'EOF'

# unminimization succeeded, there is no need to mention it in motd
rm -f /etc/update-motd.d/60-unminimize
EOF
                chmod +x chroot/usr/local/sbin/unminimize

		# inform users about the unminimize script
		cat > "chroot/etc/update-motd.d/60-unminimize" << EOF
#!/bin/sh
#
# This file is not managed by a package.  If you no longer want to
# see this message you can safely remove the file.
echo ""
echo "This system has been minimized by removing packages and content that are"
echo "not required on a system that users do not log into."
echo ""
echo "To restore this content, you can run the 'unminimize' command."
EOF

		chmod +x chroot/etc/update-motd.d/60-unminimize
		Chroot chroot "dpkg-divert --quiet --add \
			--divert /usr/bin/man.REAL --rename \
			/usr/bin/man"
		cat > chroot/usr/bin/man << EOF
#!/bin/sh
echo "This system has been minimized by removing packages and content that are"
echo "not required on a system that users do not log into."
echo ""
echo "To restore this content, including manpages, you can run the 'unminimize'"
echo "command. You will still need to ensure the 'man-db' package is installed."
EOF
                chmod +x chroot/usr/bin/man
	fi

	if [ -n "${PASSES}" ]; then
		PATH="config/:$PATH" lb chroot_layered "$@"
	else
		divert_grub chroot
		divert_update_initramfs
		lb chroot "$@"
		undivert_update_initramfs
		undivert_grub chroot
	fi

	# Let all configuration non multi-layered project here.
	# If those are moving to a multi-layer layout, this needs to be
	# done in chroot hooks.
	if [ -z "$PASSES" ]; then
		if [ "${SUBPROJECT:-}" = minimized ]; then
			# force removal of initramfs-tools, which we assert is not
			# required for any minimized images but is still pulled in by
			# default
			# also remove landscape-common, which is heavyweight and
			# in the server seed only to provide /etc/motd content which
			# would only be seen by humans
			Chroot chroot "env DEBIAN_FRONTEND=noninteractive \
				apt-get -y purge initramfs-tools busybox-initramfs \
					landscape-common"
			# and if initramfs-tools was configured before our kernel,
			# /etc/kernel/postinst.d/initramfs-tools will have created
			# an initramfs despite the generic dpkg-divert; so remove it
			# here.
			rm -f chroot/boot/initrd.img-*

			# temporary workaround: don't remove linux-base which
			# may have no other reverse-depends currently
			Chroot chroot "env DEBIAN_FRONTEND=noninteractive \
				apt-mark manual linux-base"
			Chroot chroot "env DEBIAN_FRONTEND=noninteractive \
				apt-get -y --purge autoremove"
		fi

		configure_universe

		if [ -d chroot/var/lib/preinstalled-pool ]; then
			cat > config/indices/apt.conf <<-EOF
Dir {
 ArchiveDir "chroot/var/lib/preinstalled-pool";
 OverrideDir "config/indices";
 CacheDir "config/indices";
}
Default { Packages::Compress ". bzip2"; }
TreeDefault { Directory "pool"; }
Tree "dists/$LB_DISTRIBUTION"
{
 Sections "$LB_PARENT_ARCHIVE_AREAS";
 Architectures "$LB_ARCHITECTURES";
 BinOverride "override.$LB_DISTRIBUTION.\$(SECTION)";
 ExtraOverride "override.$LB_DISTRIBUTION.extra.\$(SECTION)";
 Contents " ";
}
EOF
			for component in $LB_PARENT_ARCHIVE_AREAS; do
				mkdir -p chroot/var/lib/preinstalled-pool/dists/$LB_DISTRIBUTION/$component/binary-$LB_ARCHITECTURES
			done
			apt-ftparchive generate config/indices/apt.conf
			cat << @@EOF > chroot/etc/apt/sources.list.preinstall
# This is a sources.list entry for a small pool of packages
# provided on your preinstalled filesystem for your convenience.
#
# It is perfectly safe to delete both this entry and the directory
# it references, should you want to save disk space and fetch the
# packages remotely instead.
#
deb file:/var/lib/preinstalled-pool/ $LB_DISTRIBUTION $LB_PARENT_ARCHIVE_AREAS
#
@@EOF

			cp chroot/etc/apt/sources.list chroot/etc/apt/sources.list.orig
			cp chroot/etc/apt/sources.list.preinstall chroot/etc/apt/sources.list

			echo "Waiting on gnupg ("$GPG_PROCESS") to finish generating a key."
			wait $GPG_PROCESS

			R_ORIGIN=$(lsb_release -i -s)
			R_CODENAME=$(lsb_release -c -s)
			R_VERSION=$(lsb_release -r -s)
			R_PRETTYNAME=$(echo $R_CODENAME | sed -e 's/^\(.\)/\U\1/')

			apt-ftparchive -o APT::FTPArchive::Release::Origin=$R_ORIGIN \
				-o APT::FTPArchive::Release::Label=$R_ORIGIN \
				-o APT::FTPArchive::Release::Suite=$R_CODENAME-local \
				-o APT::FTPArchive::Release::Version=$R_VERSION \
				-o APT::FTPArchive::Release::Codename=$R_CODENAME \
				-o APT::FTPArchive::Release::Description="$R_ORIGIN $R_PRETTYNAME Local" \
				release chroot/var/lib/preinstalled-pool/dists/$R_CODENAME/ \
					> config/gnupg/Release

			gpg --home config/gnupg --detach-sign --armor config/gnupg/Release
			mv config/gnupg/Release \
				chroot/var/lib/preinstalled-pool/dists/$R_CODENAME/Release
			mv config/gnupg/Release.asc \
				chroot/var/lib/preinstalled-pool/dists/$R_CODENAME/Release.gpg
			apt-key --keyring chroot/etc/apt/trusted.gpg add config/gnupg/pubring.gpg
			find chroot/var/lib/preinstalled-pool/ -name Packages | xargs rm

			Chroot chroot "apt-get update"
			cat chroot/etc/apt/sources.list.preinstall chroot/etc/apt/sources.list.orig \
				> chroot/etc/apt/sources.list
			rm chroot/etc/apt/sources.list.preinstall chroot/etc/apt/sources.list.orig
		fi
		case $PROJECT:$SUBPROJECT in
			*)
				if [ -e "config/seeded-snaps" ]; then
					snap_list=$(cat config/seeded-snaps)
					preinstall_snaps $snap_list
				fi
				;;
		esac

		if [ "$PROJECT" = "ubuntu-cpc" ]; then
			if [ "${SUBPROJECT:-}" = minimized ]; then
				BUILD_NAME=minimal
			else
				BUILD_NAME=server
			fi
			cat > chroot/etc/cloud/build.info << EOF
build_name: $BUILD_NAME
serial: $BUILDSTAMP
EOF
		fi

		configure_network_manager

		echo "===== Checking size of /usr/share/doc ====="
		echo BEGIN docdirs
		(cd chroot && find usr/share/doc -maxdepth 1 -type d | xargs du -s | sort -nr)
		echo END docdirs

		/usr/share/livecd-rootfs/minimize-manual chroot

		clean_debian_chroot
	fi

	if [ -n "${PASSES}" ]; then
		PATH="config/:$PATH" lb binary_layered "$@"
	else
		lb binary "$@"
	fi

	touch binary.success
) 2>&1 | tee binary.log

# bash has trouble with the build.sh sourcing arrangement at the top of this
# file, so we use this cheap-and-cheerful approach rather than the more
# correct 'set -o pipefail'.
if [ -e binary.success ]; then
	rm -f binary.success
else
	# Dump the magic-proxy log to stdout on failure to aid debugging
	if [ -f /build/livecd.magic-proxy.log ] ; then
		echo "================= Magic proxy log (start) ================="
		cat /build/livecd.magic-proxy.log
		echo "================== Magic proxy log (end) =================="
	fi
	exit 1
fi

case $LB_INITRAMFS in
	casper)
		INITFS="casper"
		;;

	live-boot)
		INITFS="live"
		;;

	*)
		INITFS="boot"
		;;
esac

for OUTPUT in ext2 ext3 ext4 manifest manifest-remove size squashfs; do
	[ -e "binary/$INITFS/filesystem.$OUTPUT" ] || continue
	ln "binary/$INITFS/filesystem.$OUTPUT" "$PREFIX.$OUTPUT"
	chmod 644 "$PREFIX.$OUTPUT"
done

# we don't need a manifest-remove for a layered-aware installer
if [ "$PROJECT" = "ubuntu" ] && [ "$SUBPROJECT" = "canary" ]; then
	rm -f livecd.${PROJECT}-manifest-remove
	rm -f config/manifest-minimal-remove
fi

if [ -e config/manifest-minimal-remove ]; then
        cp config/manifest-minimal-remove  "$PREFIX.manifest-minimal-remove"
fi

for ISO in binary.iso binary.hybrid.iso; do
	[ -e "$ISO" ] || continue
	ln "$ISO" "$PREFIX.iso"
	chmod 644 "$PREFIX.iso"
	break
done

if [ -e "binary/$INITFS/filesystem.dir" ]; then
	(cd "binary/$INITFS/filesystem.dir/" && tar -c --sort=name --xattrs *) | \
		gzip -9 --rsyncable > "$PREFIX.rootfs.tar.gz"
	chmod 644 "$PREFIX.rootfs.tar.gz"
elif [ -e binary-tar.tar.gz ]; then
	cp -a binary-tar.tar.gz "$PREFIX.rootfs.tar.gz"
fi

if [ "$PROJECT:${SUBPROJECT:-}" = "ubuntu-core:system-image" ]; then
    if [ -e "binary/$INITFS/filesystem.dir" ]; then
        rootfs="binary/$INITFS/filesystem.dir"

        for dir in lib/modules lib/firmware writable meta; do
            mkdir -p $rootfs/$dir
        done

        # get a proper version from the chroot
        . $rootfs/etc/os-release
        VERSION="$(echo $PRETTY_NAME | sed 's/[^0-9.]*//g')"

        CORENAME="ubuntu-core"
        cat > $rootfs/meta/snap.yaml <<EOF
name: $CORENAME
version: $VERSION
summary: The core runtime environment for snapd
architectures: [$ARCH]
type: os
EOF

        apt-get -y install snapcraft
        snapcraft snap $rootfs

        snapfile="$(ls ${CORENAME}*.snap)"
        cp -a $snapfile $PREFIX.os.snap
    fi
fi

# '--initramfs none' produces different manifest names.
if [ -e "binary/$INITFS/filesystem.packages" ]; then
	ln "binary/$INITFS/filesystem.packages" "$PREFIX.manifest"
	chmod 644 "$PREFIX.manifest"
fi
if [ -e "binary/$INITFS/filesystem.packages-remove" ]; then
	# Not a typo, empty manifest-remove has a single LF in it. :/
	if [ $(cat binary/$INITFS/filesystem.packages-remove | wc -c) -gt 1 ]; then
		ln "binary/$INITFS/filesystem.packages-remove" "$PREFIX.manifest-remove"
		chmod 644 "$PREFIX.manifest-remove"
	fi
fi

# Since snaps are now Ubuntu first-class citizen, so always try fetching the
# list of seeded snaps into the manifest.  In case of layered images we skip
# this step, as we assume they're doing it on their own at some earlier stage.
if [ -z "$PASSES" ] && [ -e "$PREFIX.manifest" ]; then
	./config/snap-seed-parse "chroot/" "$PREFIX.manifest"
fi

# ubuntu-core splits kernel stuff into a "device" tarball so
# at this point we reset it to "none" as all the work to extract it was done already
# in a binary hook
case $PROJECT:${SUBPROJECT:-} in
        ubuntu-core:system-image)

    # create device tarball (for snappy only atm)
    if [ "$PROJECT:$SUBPROJECT" = "ubuntu-core:system-image" ]; then
      case $ARCH in
          armhf)
            subarches="generic raspi2"
            ;;
          arm64)
            subarches="generic dragonboard"
            ;;
          i386|amd64|powerpc|ppc64el|s390x)
            subarches="generic"
            ;;
      esac

      # create a clean chroot
      debootstrap --variant=minbase $LB_DISTRIBUTION chroot-device $LB_PARENT_MIRROR_BOOTSTRAP

      # ... but keep the PPA setup
      cp -a chroot/etc/apt/* chroot-device/etc/apt/

      # ... and move it in place
      rm -rf chroot
      mv chroot-device chroot

      for devarch in $subarches; do
        (echo "I: creating $devarch device tarball for $ARCH"
        HERE="$(pwd)"
        set -x

        linux_package="linux-image-$devarch"
        case $ARCH in
            amd64)
              linux_package="linux-signed-image-generic"
              ;;
            arm64)
              if [ "$devarch" = "dragonboard" ]; then
                  linux_package="linux-image-snapdragon linux-firmware-snapdragon"
              fi
              ;;
            armhf)
              if [ "$devarch" = "raspi2" ]; then
                  linux_package="linux-image-raspi2"
              fi
              ;;
            ppc64el|s390x)
              echo "I: skipping kernel and device tarball for $ARCH"
              return
              ;;
        esac

        # make sure all virtual filesystems are available
        lb chroot_proc install "$@"
        lb chroot_sysfs install "$@"
        lb chroot_devpts install "$@"

        # prepare the env
        Chroot chroot "apt-get -y update"
        Chroot chroot "apt-get -y purge linux-image-*"
        Chroot chroot "apt-get -y autoremove"
        rm -rf chroot/boot/initrd.img* chroot/boot/vmlinu?-* chroot/lib/modules/* \
            chroot/boot/abi-* chroot/boot/System.map-* chroot/boot/config-*

        # install needed packages and the kernel itself
        Chroot chroot "apt-get -y install initramfs-tools-ubuntu-core linux-firmware xz-utils"
        Chroot chroot "apt-get -y install $linux_package"

        Chroot chroot "dpkg -l" > chroot/dpkg.list
        
        # clean up
        lb chroot_devpts remove "$@"
        lb chroot_sysfs remove "$@"
        lb chroot_proc remove "$@"

        # now build the actual device tarball
        TMPDIR="$(mktemp -d)"
        mkdir -p $TMPDIR/system/
        mkdir -p $TMPDIR/assets/

        cd chroot
        cp -ar lib/modules/ $TMPDIR/system/
        cp -ar lib/firmware/ $TMPDIR/system/
        # FIXME: compat with the old kernel spec/old initramfs that
        #        expects lib/{modules,firmware}
        # 
        # FIXME2: update the initramfs-tools-ubuntu-core scripts/ubuntu-core
        #         to look at the new location        
        mkdir $TMPDIR/system/lib
        ln -s $TMPDIR/system/modules $TMPDIR/system/lib
        ln -s $TMPDIR/system/firmware $TMPDIR/system/lib

        # new assets handling
        if [ -f boot/vmlinu?-*.signed ]; then
            kernel=boot/vmlinu?-*.signed
        else
            kernel=boot/vmlinu?-*
        fi

        initrd=boot/initrd.img-*

        cp -ar $initrd $TMPDIR/assets/
        cp -ar $kernel $TMPDIR/assets/
        cp -ar boot/abi-* boot/System.map-* boot/config-* $TMPDIR/assets/

        dtbs=$(find lib/firmware -type d -name 'device-tree' -print0)
        if [ -n "$dtbs" ]; then
           mv "$dtbs" $TMPDIR/assets/dtbs
           case $devarch in
               raspi2)
                   # ubuntu-device-flash does not like subdirs here, we need to tar it up
                   if [ -e $TMPDIR/assets/dtbs/overlays ]; then
                       tar --sort=name -C $TMPDIR/assets/dtbs -f $TMPDIR/assets/dtbs/overlays.tgz -czv overlays
                       rm -rf $TMPDIR/assets/dtbs/overlays
                   fi
                   ;;
               dragonboard)
                   cp $TMPDIR/assets/dtbs/qcom/apq8016-sbc-snappy.dtb $TMPDIR/assets/dtbs/apq8016-sbc.dtb
                   # add special link needed by the dragonboard wifi driver
                   mkdir -p $TMPDIR/system/lib/firmware/wlan/
                   ln -s /run/macaddr0 $TMPDIR/system/lib/firmware/wlan/
                   ;;
           esac
        fi

        # copy dpkg manifest
        cp -ar dpkg.list $TMPDIR/assets

        # create hardware.yaml
        # this assumes armhf == u-boot
        # and all others grub
        # common bits
        cat > $TMPDIR/hardware.yaml << EOF
kernel: assets/$(basename $kernel)
initrd: assets/$(basename $initrd)
partition-layout: system-AB
EOF
        # arch specific ones
        if [ "$ARCH" = "armhf" ]; then
          cat >> $TMPDIR/hardware.yaml << EOF
dtbs: assets/dtbs
bootloader: u-boot
EOF
        else
          cat >> $TMPDIR/hardware.yaml << EOF
bootloader: grub
EOF
        fi

        # compress everything
        cd $TMPDIR
        tarname="device.tar.gz"
        manifestname="device.manifest"
        if [ "$devarch" = "raspi2" ];then
            tarname="raspi2.$tarname"
            manifestname="$devarch.$manifestname"
        elif [ "$devarch" = "dragonboard" ];then
            tarname="$devarch.$tarname"
            manifestname="$devarch.$manifestname"
        fi
        # create tarfile
        tar -c --sort=name -z -f $HERE/$PREFIX.$tarname system assets hardware.yaml

        # create device specific manifest to track kernel dpkg version
        cp assets/dpkg.list $HERE/$PREFIX.$manifestname

        # show size of initrd and kernel in the log
        ls -lh assets/

        # dump the content list into the log
        echo "I: device tarball contents for $PREFIX.$tarname:"
        find . -type f

        # azure wants its own device tarball
        if [ "$ARCH" = "amd64" ]; then
            cp $HERE/$PREFIX.$tarname $HERE/$PREFIX.azure.$tarname
        fi

        # create snap
        snapname="kernel.snap"
        metaname=canonical-pc-linux

        if [ "$devarch" = "raspi2" ];then
            metaname=canonical-pi2-linux
            snapname="$devarch.kernel.snap"
        elif [ "$devarch" = "generic" ] && [ "$ARCH" = "armhf" ];then
            metaname=canonical-bbb-linux
        elif [ "$devarch" = "dragonboard" ] && [ "$ARCH" = "arm64" ];then
            metaname=canonical-snapdragon-linux
            snapname="$devarch.kernel.snap"
        fi

        rm -rf $HERE/snap || true
        mkdir -p $HERE/snap/meta
        cp -a $TMPDIR/assets/* $HERE/snap
        cp -a $TMPDIR/system/* $HERE/snap

        cd $HERE/snap
        kernel="$(ls vmlinuz-*)"
        initrd="$(ls initrd.img-*)"
        # old kernel spec
        ln -s $kernel vmlinuz
        ln -s $initrd initrd.img
        # new kernel spec
        ln -s $kernel kernel.img
        kvers="$(ls vmlinuz-*|sed 's/^.*vmlinuz-//;s/-[a-z.]*$//')"

        VERSION=$kvers

        cat > meta/kernel.yaml <<EOF
version: $kvers
EOF
        
        cat > meta/snap.yaml <<EOF
name: $metaname
version: $VERSION
architectures: [$ARCH]
summary: The canonical $devarch $ARCH kernel
type: kernel

kernel: $(ls vmlinuz-*)
initrd: $(ls initrd.img-*)
modules: $(ls -d lib/modules/*)
firmware: lib/firmware
EOF
        if [ -d dtbs ]; then
            printf "dtbs: dtbs/ \n" >> meta/snap.yaml
        fi
        cd $HERE

        apt-get -y install snapcraft
        snapcraft snap snap

        snapfile="$(ls $metaname*.snap)"
        cp -a $snapfile $PREFIX.$snapname
        )
      done
    fi

    LB_LINUX_FLAVOURS=none
    ;;
esac

for FLAVOUR in $LB_LINUX_FLAVOURS; do
	if [ -z "$LB_LINUX_FLAVOURS" ] || [ "$LB_LINUX_FLAVOURS" = "none" ]; then
		continue
	fi
	if [ "$FLAVOUR" = "virtual" ]; then
		# The virtual kernel is named generic in /boot
		FLAVOUR="generic"
	fi
	KVERS="$( (cd "binary/$INITFS"; ls vmlinu?-* 2>/dev/null || true) | (fgrep -v .efi || true) | sed -n "s/^vmlinu.-\\([^-]*-[^-]*-$FLAVOUR\\)$/\\1/p" )"
	if [ -z "$KVERS" ]; then
		if [ -e "binary/$INITFS/vmlinuz" ]; then
			# already renamed by ubuntu-defaults-image
			break
		fi
		echo "No kernel output for $FLAVOUR!" >&2
		exit 1
	fi
	NUMKVERS="$(set -- $KVERS; echo $#)"
	if [ "$NUMKVERS" -gt 1 ]; then
		echo "Cannot handle more than one kernel for $FLAVOUR ($KVERS)!" >&2
		exit 1
	fi
	ln "binary/$INITFS/"vmlinu?-"$KVERS" "$PREFIX.kernel-$FLAVOUR"
	if [ -e "binary/$INITFS/"vmlinu?-"$KVERS.efi.signed" ]; then
		ln "binary/$INITFS/"vmlinu?-"$KVERS.efi.signed" "$PREFIX.kernel-$FLAVOUR.efi.signed"
		chmod 644 "$PREFIX.kernel-$FLAVOUR.efi.signed"
	fi
	chmod 644 "$PREFIX.kernel-$FLAVOUR"
	if [ -e "binary/$INITFS/initrd.img-$KVERS" ]; then
		ln "binary/$INITFS/initrd.img-$KVERS" "$PREFIX.initrd-$FLAVOUR"
		chmod 644 "$PREFIX.initrd-$FLAVOUR"
	fi
done

NUMFLAVOURS="$(set -- $LB_LINUX_FLAVOURS; echo $#)"
if [ "$NUMFLAVOURS" = 1 ] && [ "$LB_LINUX_FLAVOURS" != "none" ]; then
	# only one kernel flavour
	if [ -f "binary/$INITFS/vmlinuz" ] && ! [ -h "binary/$INITFS/vmlinuz" ]; then
		ln "binary/$INITFS/vmlinuz" "$PREFIX.kernel"
		chmod 644 "$PREFIX.kernel"
	else
		ln -sf "$PREFIX.kernel-$LB_LINUX_FLAVOURS" "$PREFIX.kernel"
	fi
	if [ -f "binary/$INITFS/initrd.lz" ] && ! [ -h "binary/$INITFS/initrd.lz" ]; then
		ln "binary/$INITFS/initrd.lz" "$PREFIX.initrd"
		chmod 644 "$PREFIX.initrd"
	else
		ln -sf "$PREFIX.initrd-$LB_LINUX_FLAVOURS" "$PREFIX.initrd"
	fi
fi

case $SUBARCH in
	raspi2|raspi3)
		# copy the kernel and initrd to a predictable directory for
		# ubuntu-image consumption.  In some cases, like in pi2/3
		# u-boot, the bootloader needs to contain the kernel and initrd,
		# so during rootfs build we copy it over to a directory that
		# ubuntu-image looks for and shoves into the bootloader
		# partition.
		UBOOT_BOOT="image/boot/uboot"

		mkdir -p $UBOOT_BOOT

		cp $PREFIX.initrd $UBOOT_BOOT/initrd.img || true
		cp $PREFIX.kernel $UBOOT_BOOT/vmlinuz || true
		;;
esac

# LTSP chroot building (only in 32bit and for Edubuntu (DVD))
case $PROJECT in
	edubuntu-dvd)
		if [ "$ARCH" = i386 ]; then
			echo "Building LTSP chroot"
			ltsp-build-client --base $(pwd) --mirror $LB_PARENT_MIRROR_BOOTSTRAP --arch $ARCH --dist $LB_PARENT_DISTRIBUTION --chroot ltsp-live --late-packages ldm-edubuntu-theme,plymouth-theme-edubuntu --purge-chroot --skipimage
			mkdir -p images
			mksquashfs ltsp-live images/ltsp-live.img -e cdrom
			rm -Rf ltsp-live
			if [ -f images/ltsp-live.img ]; then
				mv images/ltsp-live.img livecd.$PROJECT-ltsp.squashfs
				chmod 0644 livecd.$PROJECT-ltsp.squashfs
				rmdir --ignore-fail-on-non-empty images
			else
				echo "LTSP: Unable to build the chroot, see above for details."
			fi
		fi
		;;
esac

if [ -f "config/magic-proxy.pid" ]; then
    kill -TERM $(cat config/magic-proxy.pid)
    rm -f config/magic-proxy.pid

    # Remove previously-inserted iptables rule.
    run_iptables -t nat -D OUTPUT -p tcp --dport 80 \
        -m owner ! --uid-owner daemon -j REDIRECT --to 8080
fi

case $PROJECT in
    ubuntu-cpc)
        config/hooks.d/remove-implicit-artifacts
esac