livecd-rootfs/live-build/buildd/hooks/52-linux-virtual-image.binary

#!/bin/bash -eux
# vi: ts=4 expandtab
#
# Generate linux-virtual image
#

case $ARCH in
    amd64|arm64)
        ;;
    *)
        echo "We don't build bootable Buildd images for $ARCH."
        exit 0
        ;;
esac

echo "Building bootable Buildd image"

IMAGE_STR="# BUILDD_IMG: This file was created/modified by the Buildd Image build process"

. config/functions

mount_d=$(mktemp -d)

create_derivative uefi linux-virtual #sets $derivative_img
mount_disk_image $derivative_img $mount_d

# unmount disk image and remove created folders on exit
# even though we unmount manually before we convert to
# qcow2, we have this here just in case we error out before
# that step
cleanup_linux_virtual() {
    if [ -d "$mount_d" ]; then
        umount_disk_image "$mount_d"
    fi
    rm -rf $mount_d $derivative_img
}
trap cleanup_linux_virtual EXIT

# The base image is built with packages from the release pocket;
# however, we want the latest from updates and security. Those
# pockets are already enabled, we just need to perform an upgrade
# to pull in the latest packages.
env DEBIAN_FRONTEND=noninteractive chroot "$mount_d" apt-get \
    update --assume-yes
# Perform a dist-upgrade to pull in package updates
env DEBIAN_FRONTEND=noninteractive chroot "$mount_d" apt-get \
    dist-upgrade --assume-yes
env DEBIAN_FRONTEND=noninteractive chroot "$mount_d" apt-get \
    dist-upgrade --assume-yes

# Install dependencies
env DEBIAN_FRONTEND=noninteractive chroot "$mount_d" apt-get \
    install -y lsb-release locales initramfs-tools busybox-initramfs \
               udev dbus netplan.io cloud-init openssh-server sudo snapd \
               lxd-agent-loader

# Install a kernel
divert_grub "$mount_d"
env DEBIAN_FRONTEND=noninteractive chroot "$mount_d" apt-get \
    install --assume-yes linux-image-virtual
env DEBIAN_FRONTEND=noninteractive chroot "$mount_d" apt-get \
    autoremove --purge --assume-yes
chroot "$mount_d" update-grub
undivert_grub "$mount_d"

# Update initramfs image
chroot "$mount_d" update-initramfs -c -v -k all

# extract kernel and initrd
cp $mount_d/boot/initrd.img-* livecd.$PROJECT.initrd-generic
cp $mount_d/boot/vmlinuz-* livecd.$PROJECT.vmlinuz-generic

# Cleanup
env DEBIAN_FRONTEND=noninteractive chroot "$mount_d" apt-get \
    clean

create_manifest $mount_d "livecd.$PROJECT.disk-linux-virtual.manifest"

# unmount disk image to prevent corruption
# and remove it so the trap doesn't try to unmount it again
umount_disk_image $mount_d
rm -rf $mount_d

convert_to_qcow2 $derivative_img "livecd.$PROJECT.disk-linux-virtual.img"