Prompt for enabling module.

[vyasamit2007]

[omkar-pednekar]

Hello @gauravgoyal / @vyasamit2007 ,

I have added a user interaction in command where user can enable module while running command. But I am facing issue in this.
I am enabling required module in Validation phase. After enabling module, we are not getting entity type and handlers provided by enabled module in command.

If we run same command again, then are able to run it without any error.

[omkar-pednekar]

Here issue is, all required services, we are injecting through DI. Before validation phase, all required services gets instantiated. So, in command, when we try to load storage of newly installed entity through module like Media or Paragraph, entityTypeManager is not able to find it as service object was created before installing module. It is an old copy of service object.
I tried below approaches:

1. Injecting service_container instead of entity_type.manager. Get required service from container wherever needed. This also returning old copy.
2. Lazy loading service. https://www.webomelette.com/lazy-loaded-services-drupal-8
3. Flushing entity cache with $this->entityTypeManager->useCaches(FALSE).
4. Clearing cached definitions with $this->entityTypeManager->clearCachedDefinitions()
5. Clearing complete cache in validation hook after enabling module.
6. Adding service as Optional dependency

I asked this on our internal slack but not received problem solving response.
Ref: https://acquia.slack.com/archives/G01772FE4KU/p1615543619013200

[omkar-pednekar]

@gauravgoyal / @vyasamit2007 ,

We can enable required modules and terminate command. User can can manually run command again to process entities. I have updated code in PR. Please review.