src/image/build_image

#!/usr/bin/python
#
# Copyright 2016 Google 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.

import argparse
import importlib
import sys

import imagelib.layout

parser = argparse.ArgumentParser(
    description='Build a firmware image from its components')

parser.add_argument('-o', dest='output_file', default='image.bin',
                    help='Output image file name')

parser.add_argument('--verbose', dest='verbose', default=False,
                    action='store_true',
                    help='Enable verbose logging output')
parser.add_argument('--log-file', dest='log_file', default='',
                    help='File to write logging output to')

subparsers = parser.add_subparsers(title='Layouts', dest='layout',
                                   help='layout help')

def main():
    layouts = {}
    for layout in imagelib.layout.layouts:
        layouts[layout] = importlib.import_module('.' + layout,
                                                  'imagelib.layout')

    for name, layout in layouts.iteritems():
        subparser = subparsers.add_parser(name, help='%s help' % name)
        layout.add_arguments(subparser)

    options = parser.parse_args()

    image = layouts[options.layout].prepare(options)

    if options.verbose and options.log_file:
        with open(options.log_file, mode="wb", buffering=0) as log_file:
            image_data = image.build(log_file)
    else:
        log_file = sys.stdout if options.verbose else None
        image_data = image.build(log_file)

    with open(options.output_file, mode="wb", buffering=0) as output:
        output.write(image_data)

if __name__ == '__main__':
    main()