Add reporting arguments to an argument parser.

    Parameters
    ----------
    parser: `argparse.ArgumentParser`

    Returns
    -------
    `argparse.ArgumentGroup`
        The argument group created.

def add_reporting_args(parser):
    """Add reporting arguments to an argument parser.

    Parameters
    ----------
    parser: `argparse.ArgumentParser`

    Returns
    -------
    `argparse.ArgumentGroup`
        The argument group created.
    """
    g = parser.add_argument_group('Reporting options')

    g.add_argument(
        '-l', '--log-file', default=None,
        type=str, metavar=file_mv,
        help='Path of log file (if specified, report to stdout AND file.'
    )

    g.add_argument('-q', '--quiet', action='store_true',
                   help='Only output errors and warnings.')

    g.add_argument(
        '-v', '--verbose', action='store_true',
        help='Enable verbose output. Ignored if --quiet is specified.'
    )

    return g