livecd-rootfs/live-build/ubuntu-server/hooks/032-installer-squashfs.binary

#!/bin/bash -ex
# vi: ts=4 noexpandtab
#
# Generate a squashfs root and manifest

set -x

echo "032-installer-squashfs.binary"

case $IMAGE_TARGETS in
	""|*squashfs*)
		;;
	*)
		echo "Skipping squashfs build"
		exit 0
		;;
esac

if [ -n "$SUBARCH" && "$SUBARCH" != "intel-iot" ]; then
	echo "Skipping rootfs build for subarch flavor build"
	exit 0
fi

. config/binary
. config/functions
. config/common

FILESYSTEM_ROOT=binary/boot/squashfs.dir
INSTALLER_ROOT=binary/boot/installer.squashfs.dir
OVERLAY_ROOT=binary/overlay

PROJECT=$PROJECT${SUBARCH:+-$SUBARCH}

mkdir -p "$INSTALLER_ROOT" "$OVERLAY_ROOT"

# Create an installer squashfs layer
mount_overlay "$FILESYSTEM_ROOT/" "$OVERLAY_ROOT/" "$INSTALLER_ROOT/"

setup_mountpoint "$INSTALLER_ROOT"

# Override JobRunningTimeoutSec to 0s on the .device unit that
# subiquity_config.mount depends on to avoid a 5s delay on switching
# to a new VT when there is no device there (LP: #1750117).
# It would be better to have this in ../includes.binary/overlay but
# you can't have backslashes in filenames in bzr branches!
ANSWERS_DEVICE_UNIT='dev-disk-by\x2duuid-00c629d6\x2d06ab\x2d4dfd\x2db21e\x2dc3186f34105d.device'
mkdir -p "$INSTALLER_ROOT/etc/systemd/system/$ANSWERS_DEVICE_UNIT.d"
cat > "$INSTALLER_ROOT/etc/systemd/system/$ANSWERS_DEVICE_UNIT.d/override.conf" <<EOF
[Unit]
JobRunningTimeoutSec=0s
Wants=subiquity_config.mount
EOF

# Prepare installer layer.

# Install:
#   1. linux-firmware for kernel to upload into hardware.
#   2. casper for live session magic.
#   3. openssh-server to enable the "ssh into live session" feature
chroot $INSTALLER_ROOT apt-get -y install linux-firmware lupin-casper openssh-server

# Make sure NoCloud is last
values=$(echo get cloud-init/datasources | chroot $INSTALLER_ROOT debconf-communicate | sed 's/^0 //;s/NoCloud, //;s/None/NoCloud, None/')
printf "%s\t%s\t%s\t%s\n" \
   cloud-init cloud-init/datasources multiselect  "$values" |
      chroot $INSTALLER_ROOT debconf-set-selections
chroot $INSTALLER_ROOT dpkg-reconfigure --frontend=noninteractive cloud-init

if [ `dpkg --print-architecture` = s390x ]; then
    chroot $INSTALLER_ROOT apt-get -y install s390-tools-zkey
    # because z/VM x3270 is just ttyS0
    cp -r $INSTALLER_ROOT/usr/lib/systemd/system/serial-getty@sclp_line0.service.d $INSTALLER_ROOT/usr/lib/systemd/system/serial-getty@ttyS0.service.d
fi
chroot $INSTALLER_ROOT apt-get clean

# For bug #1743643 "Install to dirty disk with swap fails" remove the
# "helpful" casper script that mounts any swap partitions it finds.
rm -f $INSTALLER_ROOT/usr/share/initramfs-tools/scripts/casper-bottom/*swap

# Preseed subiquity into installer layer
snap_prepare $INSTALLER_ROOT
snap_preseed $INSTALLER_ROOT subiquity/classic
# Drop lxd from the installer layer preseed
sed -i -e'N;/name: lxd/,+2d' $INSTALLER_ROOT/var/lib/snapd/seed/seed.yaml

teardown_mountpoint "$INSTALLER_ROOT"

# Drop snaps that got copied up from base layer, due to snap-preseed
# tool doing --reset & speedup
for snap in $(cd $OVERLAY_ROOT; find var/lib/snapd/ -name '*.snap'); do
    if [ -f $FILESYSTEM_ROOT/$snap ]; then
        rm $OVERLAY_ROOT/$snap;
    fi
done

squashfs_f="${PWD}/livecd.${PROJECT}.installer.squashfs"

(cd "$OVERLAY_ROOT/" &&
      mksquashfs . ${squashfs_f} \
        -no-progress -xattrs -comp xz )