Lookbook overrides ViewComponent `show_previews` config depending on load order

[ariel-codes]

Describe the bug

If Lookbook is before ViewComponent in the Gemfile, Lookbook overrides config.view_component.show_previews to true.

To Reproduce

Repo

https://github.com/ariel-codes/vc_preview_false

Steps to reproduce the behavior

In a Rails app generated with rails new --minimal

1. Add this to Gemfile

   gem "lookbook"
   gem "view_component"

2. Add this to config/application.rb

   config.view_component.show_previews = false

3. Start bin/rails s and navigate to http://localhost:3000/rails/view_components/

Expected behavior

Navigation should result in a 404, but instead shows ViewComponent previews.

Version numbers

Please complete the following information:

• Lookbook: 2.2.0
• ViewComponent: 2.82.0
• Rails: 7.1.2
• Ruby: 3.2.2

[ariel-codes]

Maybe this isn't a bug per se – but there should be a warning on the docs since this could make VC previews available in cases that aren't desirable, such as in production.

[allmarkedup]

Hey @ariel-codes, this is intentional as Lookbook requires ViewComponent previews to be available in order to render some previews correctly.

However you are totally correct - there should be a warning in the docs about this. I'll add one in when I get a chance.

I would generally recommend only loading the Lookbook gem in development if you are not using it in production:

group :development do
  gem "lookbook"
end

But regardless as it is silently overriding the ViewComponent config option this should be noted somewhere. Thanks for the suggestion :)

[allmarkedup]

@ariel-codes I've just added a note about this behaviour to the docs so I'm going to go ahead and close this issue now. Thanks again for bringing it to my attention!