#!/bin/bash
# -*- mode: sh -*-
# © Copyright IBM Corporation 2019
#
#
# 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.

# Build and run a container image with Buildah installed

if [ $# -eq 0 ]; then
  echo "Usage: $0 imageName imageTag buildah-options"
  exit 1
fi

readonly SCRIPT_DIR="$( cd "$(dirname "$0")" ; pwd -P )"
readonly DIR=${SCRIPT_DIR}/..
readonly BUILDAH_IMAGE=mq-buildah
RUN_OPTS="--volume ${DIR}:/src --cap-add SYS_ADMIN --rm --interactive --tty"
CMD="docker"

# If Docker is installed, then map the Docker socket into the container, to
# allow buildah to push the resulting image into Docker's image store
# WARNING: This means that the buildah container can do anything the "docker"
# can do.
command -v docker
if [[ $? == 0 && -e /var/run/docker.sock ]]; then
  RUN_OPTS="${RUN_OPTS} --volume /var/run/docker.sock:/var/run/docker.sock"
fi

command -v podman
if [[ $? -eq 0 ]]; then
  CMD="podman"
  OCI_DIR="/tmp/mq-buildah"
  mkdir -p ${OCI_DIR}
  RUN_OPTS="${RUN_OPTS} --volume ${OCI_DIR}:/var/oci"
  echo "Image archives will be written to ${OCI_DIR}"
fi

${CMD} build --tag ${BUILDAH_IMAGE} --file ${SCRIPT_DIR}/Dockerfile ${SCRIPT_DIR}
set -x
${CMD} run ${RUN_OPTS} ${BUILDAH_IMAGE} "$@"