How to use the vcstool.executor.generate_jobs function in vcstool

break
    # if no client type is specified enable all client types
    if not any_client_type:
        for client in vcstool_clients:
            if client.type in args:
                args.__dict__[client.type] = True

    command = CustomCommand(args)

    # filter repositories by specified client types
    clients = find_repositories(command.paths, nested=command.nested)
    clients = [c for c in clients if c.type in args and args.__dict__[c.type]]

    if command.output_repos:
        output_repositories(clients)
    jobs = generate_jobs(clients, command)
    results = execute_jobs(
        jobs, show_progress=True, number_of_workers=args.workers,
        debug_jobs=args.debug)

    output_results(results, hide_empty=args.hide_empty)

    any_error = any(r['returncode'] for r in results)
    return 1 if any_error else 0

def main(args=None, stdout=None, stderr=None):
    set_streams(stdout=stdout, stderr=stderr)

    parser = get_parser()
    add_common_arguments(parser, skip_hide_empty=True, path_nargs='?')
    args = parser.parse_args(args)

    command = ExportCommand(args)
    clients = find_repositories(command.paths, nested=command.nested)
    if command.output_repos:
        output_repositories(clients)
    jobs = generate_jobs(clients, command)
    results = execute_jobs(jobs, number_of_workers=args.workers)

    # check if at least one repo was found in the client directory
    basename = None
    for result in results:
        result['path'] = get_relative_path_of_result(result)
        if result['path'] == '.':
            basename = os.path.basename(os.path.abspath(result['client'].path))
    # in that case prefix all relative paths with the client directory basename
    if basename is not None:
        for result in results:
            if result['path'] == '.':
                result['path'] = basename
            else:
                result['path'] = os.path.join(basename, result['path'])

def simple_main(parser, command_class, args=None):
    add_common_arguments(parser)
    args = parser.parse_args(args)

    command = command_class(args)
    clients = find_repositories(command.paths, nested=command.nested)
    if command.output_repos:
        output_repositories(clients)
    jobs = generate_jobs(clients, command)
    results = execute_jobs(
        jobs, show_progress=True, number_of_workers=args.workers,
        debug_jobs=args.debug)

    output_results(results, hide_empty=args.hide_empty)

    any_error = any(r['returncode'] for r in results)
    return 1 if any_error else 0