def invalidate(end_task, module=None, tasks_to_invalidate=None, yes=False):
"""Invalidate specified task."""
cmdline_parser_args = ['--module', module, end_task
] if module is not None else [end_task]
end_task = CmdlineParser(cmdline_parser_args).get_task_obj()
stats = invalidate_stats(end_task, tasks_to_invalidate)
click.echo(stats)
if yes or click.confirm('Do you want to continue?', abort=True):
invalidate_downstream(end_task, tasks_to_invalidate)
click.echo('Done.')
