#!/bin/bash
#
# Copyright (c) 2023 The Flatcar Maintainers.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

SCRIPT_ROOT=$(dirname $(readlink -f "$0"))
. "${SCRIPT_ROOT}/common.sh" || exit 1

# Script must run inside the chroot
assert_inside_chroot

assert_not_root_user

# Developer-visible flags.
DEFINE_string board "${DEFAULT_BOARD}" \
  "The board to build an image for."
DEFINE_string build_dir "" \
  "Directory in which to place image result directories (named by version)"
DEFINE_string prod_image_path "" \
  "Path to the generic production image"
DEFINE_string prod_pkgdb_path "" \
  "Path to the tarball with portage package database from generic image production image"
DEFINE_string version_id "${FLATCAR_VERSION_ID}" \
  "Version ID stored inside the sysext extension"

FLAGS_HELP="USAGE: build_oem_sysext [flags] [oem name].
This script is used to build a Flatcar OEM sysext images.
The built image is in <build_dir>/oem-<oem>.raw.

Examples:

build_oem_sysext \
    --board=amd64-usr \
    --build_dir=<build_dir> \
    --prod_image_path=<path_to_bin_file> \
    --prod_pkgdb_path=<path_to_pkgdb_tarbal> \
    --version_id=\"\${FLATCAR_VERSION_ID}\" \
    oem-azure
...
"
show_help_if_requested "$@"

# Parse command line.
FLAGS "$@" || exit 1
if [[ -z "${FLAGS_ARGV}" ]]; then
    echo 'No OEM given'
    exit 0
fi

eval set -- "${FLAGS_ARGV}"

# Only now can we die on error.  shflags functions leak non-zero error codes,
# so will die prematurely if 'switch_to_strict_mode' is specified before now.
switch_to_strict_mode

# N.B.  Ordering matters for some of the libraries below, because
# some of the files contain initialization used by later files.
. "${BUILD_LIBRARY_DIR}/toolchain_util.sh" || exit 1
. "${BUILD_LIBRARY_DIR}/board_options.sh" || exit 1
. "${BUILD_LIBRARY_DIR}/oem_sysext_util.sh" || exit 1

BUILD_DIR=${FLAGS_build_dir:-"${BUILD_DIR}"}

if [[ -z "${FLAGS_prod_image_path}" ]]; then
    error "--prod_image_path is required."
    exit 1
fi

if [[ -z "${FLAGS_prod_pkgdb_path}" ]]; then
    error "--prod_pkgdb_path is required."
    exit 1
fi

for oem; do
    oem_sysext_create "${oem}" "${BOARD}" "${FLAGS_version_id}" "${FLAGS_prod_image_path}" "${FLAGS_prod_pkgdb_path}" "${BUILD_DIR}"
done