Register with sprockets when sprockets is available

[guzart]

This allow to use react-rails without sprockets. User can use their own renderer without the need for sprockets.

This was a quick proof of concept, please let me know what would you like the style code to be.

[rmosolgo]

I like this idea, I think it would go well with #427 ! Your code style is fine by me.

One question: how can we be sure to keep maintaining this in the future? Can we test somehow that react-rails still works in environment without sprockets?

[guzart]

I did a quick google search on how to test "railties", it seems like it's considered an integration test with Rails. Looking for examples I found that the Draper gem has an actual Rails app fixture.

I'll keep looking and thinking on how to test the conditional integration.

[rmosolgo]

Yeah, I was wondering if we might be able to add an appraisal with some configuration that didn't have sprockets ... but, sprockets is a dependency of Rails (right?) so I'm not sure how customizing the gemfile could do that :S

[rmosolgo]

Just curious, how do you run Rails without Sprockets? Isn't Sprockets a dependency of Rails (via sprockets-rails?

[guzart]

I guess you can't help installing the gem since it's a direct dependency of the Rails gemspec.

TLDR; you remove the require "sprockets/railtie" line from your application.rb file.

When generating a site you can add the --skip-sprockets flag which generates an application.rb file with the list dependencies instead of just require "rails/all", and the require "sprockets/railtie" line is omitted.

[rmosolgo]

@guzart Thanks for your work on this! I pulled your commit into #555 so I could rebase it & set up a test run without the Sprockets railtie.