#!/bin/sh
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This file is part of dobuild.
# Copyright (c) 2019 Contributors as noted in the AUTHORS file.
#
# SPDX-License-Identifier: MPL-2.0

set -e

physical_pwd() {
  pwd -P 2>/dev/null || pwd
}

try_canonicalize() {
  readlink -f "$@" 2>/dev/null || realpath "$@"
}

canonicalize() {
  if ! try_canonicalize "$1" 2>/dev/null; then
    echo "$(cd "$(dirname "$1")" && physical_pwd)/$(basename "$1")"
  fi
}

scriptdir() {
  dirname "$(canonicalize "${BASH_SOURCE:-$1}")"
}

DOBUILDDIR="${DOBUILDDIR:-"$(dirname "$(scriptdir "$0")")"}"
PATH="$DOBUILDDIR/bin:$PATH"

DOBUILD_COMPOSEVERSION="${DOBUILD_COMPOSEVERSION:-1.24.0}"
DOBUILD_COMPOSEIMAGE="${REGISTRY_PREFIX}docker/compose:${DOBUILD_COMPOSEVERSION}"
DOBUILD_COMPOSEENTRYPOINT="${DOBUILD_COMPOSEENTRYPOINT:-docker-compose}"

export DOBUILDDIR
export DOBUILD_PROJECTDIR="${DOBUILD_COMPOSEPROJECTDIR:-"$PWD"}"
export DOBUILD_HOSTENVFILTER="${DOBUILD_COMPOSEHOSTENVFILTER:-^COMPOSE}"

set -- "$@" --

WORKINGDIR=

while :; do
  case $1 in
    --project-directory)
      if [ "$2" != '--' ]; then
        WORKINGDIR="$2"
        shift
      else
        printf 'error: "%s" requires a non-empty option argument.\n' "$1" >&2
        exit 3
      fi
      ;;
    --project-directory=)
      printf 'error: "%s" requires a non-empty option argument.\n' "$1" >&2
      exit 3
      ;;
    --project-directory=?*)
      WORKINGDIR="${1#*=}"
      ;;
    --)
      shift
      break
      ;;
    *)
      set -- "$@" "$1"
      ;;
  esac

  shift
done

WORKINGDIR="${WORKINGDIR:-"$DOBUILD_PROJECTDIR"}"

if [ -z "${DOCKER_HOST+x}" ]; then
  export DOCKER_HOST='unix:///var/run/docker.sock'
fi

set -- container_run --workdir "$(canonicalize "$WORKINGDIR")" --entrypoint "$DOBUILD_COMPOSEENTRYPOINT" "$DOBUILD_COMPOSEIMAGE" "$@"

exec "$@"