def init(*args):
    """Initialize a new fragments repository. Repository is in a directory named _fragments/, created in either the current working directory, or FRAGMENTS_ROOT if specified."""
    parser = argparse.ArgumentParser(prog="%s %s" % (__package__, init.__name__), description=init.__doc__)
    parser.add_argument('FRAGMENTS_ROOT', help="root directory in which to create the _fragments/ directory", nargs="?")
    args = parser.parse_args(args)

    try:
        config = FragmentsConfig()
    except ConfigurationFileCorrupt:
        config = FragmentsConfig(autoload=False)
        os.rename(config.path, config.path + '.corrupt')
        config.dump()
    except ConfigurationFileNotFound:
        config = FragmentsConfig(autoload=False)
        config.dump()
    except ConfigurationDirectoryNotFound:
        if args.FRAGMENTS_ROOT:
            configuration_parent = os.path.realpath(args.FRAGMENTS_ROOT)
        else:
            configuration_parent = os.getcwd()
        if os.access(configuration_parent, os.R_OK|os.W_OK):
            configuration_path = os.path.join(configuration_parent, configuration_directory_name)
            os.mkdir(configuration_path)
            config = FragmentsConfig(configuration_path, autoload=False)
            config.dump()
        else:
            raise ExecutionError("Could not create fragments directory in '%s', aborting.\n(Do you have the correct permissions?)" % configuration_parent)
    else:
        raise ExecutionError("Current fragments configuration found in '%s', aborting." % config.path)
    yield "Fragments configuration created in '%s'" % config.path