Parses the command line arguments.

    :return: Namespace with arguments.
    :rtype: Namespace

def _parse_args():
    """
    Parses the command line arguments.

    :return: Namespace with arguments.
    :rtype: Namespace
    """
    parser = argparse.ArgumentParser(description='rain - a new sort of automated builder.')
    
    parser.add_argument('action', help='what shall we do?', default='build', nargs='?',
                        choices=['build',
                                 'ls',
                                 'keep'] + removal_cmds)

    parser.add_argument('-c', '--count', type=int, default=1,
                        help='a count of items on which to operate. [default: %(default)s]')

    parser.add_argument('--keep', type=int, default=-1,
                        help='how many builds should we keep around? [default: %(default)s]')

    parser.add_argument('-v', '--verbose', action='count', default=0, help='Be more verbose. (can be repeated)')

    parser.add_argument('--version', default=False, action='store_true',
                        help='print version number and exit. [default: %(default)s]')

    return parser.parse_args()