def find_top():
    cur_dir = os.getcwd()
    while cur_dir != "/":
        hb_internal = os.path.join(cur_dir, 'build/lite/hb_internal')
        if os.path.exists(hb_internal):
            return cur_dir
        cur_dir = os.path.dirname(cur_dir)
    raise Exception("Please call hb utilities inside source root directory")
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def get_hb_commands(config_file):
    if not os.path.exists(config_file):
        raise Exception('Error: {} not exist, couldnot get hb command set'.format(config_file))
    with open(config_file, 'r') as file:
        config = json.load(file)
        return config
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def main():
    try:
        topdir = find_top()
    except Exception as ex:
        return print("hb_error: Please call hb utilities inside source root directory")
    sys.path.insert(0, os.path.join(topdir, 'build/lite'))
⑴  parser = argparse.ArgumentParser(description='OHOS Build System '
                                     f'version {VERSION}')
    parser.add_argument('-v',
                        '--version',
                        action='version',
                        version=f'[OHOS INFO] hb version {VERSION}')

    subparsers = parser.add_subparsers()
    parser_list = []

⑵  command_set = get_hb_commands(os.path.join(topdir, 'build/lite/hb_internal/hb_command_set.json'))
    for key, val in command_set.items():
        parser_list.append({'name': key, 'help': val})

    for each in parser_list:
        module_parser = subparsers.add_parser(name=each.get('name'),
                                              help=each.get('help'))
⑶      module = importlib.import_module('hb_internal.{0}.{0}'.format(
            each.get('name')))
⑷      module.add_options(module_parser)
        module_parser.set_defaults(parser=module_parser,
                                  command=module.exec_command)

⑸  args = parser.parse_known_args()

    module = importlib.import_module('hb_internal.common.utils')
    hb_error = getattr(module, 'hb_error')
    hb_warning = getattr(module, 'hb_warning')
    ohos_exception = getattr(module, 'OHOSException')
    try:
⑹      if args[0].parser.prog == 'hb set' and 'root_path' in vars(args[0]):
            # Root_path is topdir.
            args[0].root_path = topdir
⑺      if "tool" in args[0].parser.prog:
            status = args[0].command(args)
        else:
            status = args[0].command(args[0])
    except KeyboardInterrupt:
        hb_warning('User Abort')
        status = -1
    except ohos_exception as exception:
        hb_error(exception.args[0])
        status = -1
    except Exception as exception:
        if not hasattr(args[0], 'command'):
            parser.print_help()
        else:
            hb_error(traceback.format_exc())
            hb_error(f'Unhandled error: {exception}')
        status = -1

    return status
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