diskimage-builder/elements/dpkg/bin/install-packages

#!/bin/bash

# Copyright 2012 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.

set -eu
set -o pipefail

# install-packages package [package ...]

install_deb_packages () {
  DEBIAN_FRONTEND=noninteractive \
    http_proxy=${http_proxy:-} https_proxy=${https_proxy:-} \
    no_proxy=${no_proxy:-} \
    apt-get --option "Dpkg::Options::=--force-confold" --assume-yes "$@"
}

if [ "$1" = "-u" ] ; then
  install_deb_packages dist-upgrade
  exit 0
elif [ "$1" = "-e" ]; then
  install_deb_packages remove $@
  shift
else
  install_deb_packages install $@
fi