wtf.py

def _validate_indico_dir(ctx, param, value):
    pass


def _validate_name(ctx, param, value):
    print ctx.params  # does NOT contain indico_dir


@click.command()
@click.argument('name', callback=_validate_name)
@click.option('--indico-dir', envvar='INDICO_DIR', metavar='DIR', default='indico', callback=_validate_indico_dir,
              help='path to the indico folder')
def main(name, indico_dir, event, models, blueprint):
    pass