diskimage-builder/diskimage_builder/elements/debian/install.d/10-cloud-opinions

#!/bin/bash
#
# Copyright 2014 Hewlett-Packard Development Company, L.P.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
#

if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
    set -x
fi
set -eu
set -o pipefail
case "${DIB_RELEASE}" in
    hamm|slink|potato|woody|sarge|etch|lenny|squeeze|wheezy)
        DIB_DEBIAN_ALT_INIT_PACKAGE=${DIB_DEBIAN_ALT_INIT_PACKAGE:-sysvinit}
        ;;
    *)
        DIB_DEBIAN_ALT_INIT_PACKAGE=${DIB_DEBIAN_ALT_INIT_PACKAGE:-systemd-sysv}
        ;;
esac


adduser --gecos Debian-cloud-init-user --disabled-password --quiet debian
install -d -m 0755 -o root -g root /etc/sudoers.d
echo 'debian ALL=(ALL) NOPASSWD:ALL' > /etc/sudoers.d/debian-cloud-init
chmod 0440 /etc/sudoers.d/debian-cloud-init

if [ "$DIB_DEBIAN_ALT_INIT_PACKAGE" != "sysvinit" ]; then
    # To avoid a conflict against an essential package, we need to remove sysvinit first
    dpkg --purge --force remove-essential sysvinit
    apt-get install -y $DIB_DEBIAN_ALT_INIT_PACKAGE
    printf "Package: sysvinit\nPin: origin \"\"\nPin-Priority: -1\n" > \
        /etc/apt/preferences.d/sysvinit
fi

case "${DIB_RELEASE}" in
    bookworm|stable|testing)
        apt-get install -y netplan.io
        ;;
esac