#!/bin/bash
#
# Copyright 2015 Hewlett-Packard Development Company, L.P.
# Copyright 2019 Red Hat, INC.
#
# 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

: "${DIB_CONTAINERFILE_RUNTIME:=podman}"

# Convert the old value which was podman specific
if [[ "${DIB_CONTAINERFILE_PODMAN_ROOT:-0}" != '0' ]]; then
    DIB_CONTAINERFILE_RUNTIME_ROOT=1
fi

if [[ -z "${DIB_CONTAINERFILE_NETWORK_DRIVER:-}"  ]]; then
    DIB_CONTAINERFILE_RUNTIME_NETWORK=""
else
    DIB_CONTAINERFILE_RUNTIME_NETWORK="--network ${DIB_CONTAINERFILE_NETWORK_DRIVER:-}"
fi

if [ -f ${TARGET_ROOT}/.extra_settings ] ; then
    . ${TARGET_ROOT}/.extra_settings
fi

if [ -z "${DIB_CONTAINERFILE_DOCKERFILE:-}" ]; then
    _xtrace=$(set +o | grep xtrace)
    set +o xtrace

    eval declare -A image_elements=($(get_image_element_array))

    for i in "${!image_elements[@]}"; do
        element=$i
        element_dir=${image_elements[$i]}

        containerfile="${element_dir}/containerfiles/${DIB_RELEASE}"
        if [ -f "${containerfile}" ]; then
            echo "Found container file ${containerfile}"
            DIB_CONTAINERFILE_DOCKERFILE="${containerfile}"
            break
        fi
    done

    $_xtrace

    if [ -z "${DIB_CONTAINERFILE_DOCKERFILE:-}" ]; then
        echo "*** DIB_CONTAINERFILE_DOCKERFILE not specified or found!"
        exit 1
    fi
fi

# Use the image cache directory as the default context, so anything
# there is automatically available for COPY commands.
DIB_CONTAINER_CONTEXT=${DIB_CONTAINER_CONTEXT:-${DIB_IMAGE_CACHE}/containerfile}

mkdir -p $DIB_CONTAINER_CONTEXT

if [[ ${DIB_CONTAINERFILE_RUNTIME_ROOT:-0} -gt 0 ]]; then
    _sudo="sudo"
else
    _sudo=""
fi

_podman_build_image="dib-tmp-work-image-$RANDOM"
_podman_export_container="dib-tmp-export-$RANDOM"

function podman_cleanup() {
    echo "Cleaning up container ${_podman_export_container}"
    ${_sudo} ${DIB_CONTAINERFILE_RUNTIME} rm ${_podman_export_container} || true
    echo "Cleaning up build image ${_podman_build_image}"
    ${_sudo} ${DIB_CONTAINERFILE_RUNTIME} rmi ${_podman_build_image} || true
}

trap "podman_cleanup" EXIT

${_sudo} ${DIB_CONTAINERFILE_RUNTIME} build ${DIB_CONTAINERFILE_RUNTIME_NETWORK} -t ${_podman_build_image} -f $DIB_CONTAINERFILE_DOCKERFILE $DIB_CONTAINER_CONTEXT
${_sudo} ${DIB_CONTAINERFILE_RUNTIME} run ${DIB_CONTAINERFILE_RUNTIME_NETWORK} --name ${_podman_export_container} -d ${_podman_build_image} /bin/sh
# NOTE(ianw) 2021-11-10 the tar must always be sudo to write out the chroot files
# as other uids
${_sudo} ${DIB_CONTAINERFILE_RUNTIME} export ${_podman_export_container} | sudo tar -C $TARGET_ROOT --numeric-owner -xf -

sudo rm -f ${TARGET_ROOT}/.extra_settings