Drush task for lightweight cron

This is a nice idea. I have not been able to get Drush working yet on my local server, so I have never used it properly. I really need to get that sorted, then I can test your patch.

Have you seen blog tip Replace hook_drush_command by a yaml file?
I wonder if this is now available for us to use, instead of the hook implementation?

On second look, Replace hook_drush_command by a yaml file requires the .drush.yml file but it still needs hook_drush_command(). For our small usage it is not worth adding two new files, so sticking with the original scheduler.drush.inc

I have added a message to say that the lightweight cron process has finnished. Then added an option --nomsg to inhibit this message, in the cases where this might be used as part of a larger script.

Just one quesion - is there a reason why you added the file into a new drush folder? It works fine if simply added into the scheduler main directory.

I did some research and there is no particular reason or encouragement to have the .drush.inc file in a separate folder, so I left it at the module root folder.

Thanks mikey_p for creating the patch and providing this useful addition.

Very easy to add the same feature for 7.x. Just changed 'core' => array('7'), and instead of

\Drupal::service('scheduler.manager')->runCron();

it is:

module_load_include('inc', 'scheduler', 'scheduler.cron');
scheduler_cron();