Precompile slim templates using the rails asset pipeline

Question

It would be super handy if I could precompile slim templates using the rails asset pipeline. I was hoping to stick my templates in app/assets/html and serve them up that way.

Here's what I've got so far:

# config/initializers/slim.rb
Rails.application.assets.register_engine('.slim', Slim::Template)

# config/application.rb
config.assets.paths << "#{Rails.root}/app/assets/html"
config.assets.register_mime_type('text/html', '.html')

Running rake assets:precompile reads the .html.slim files in app/assets/html but it doesn't compile them and the output file still has the .slim extension.

Is there a way to make this work?

Answer 1

The answer by @kurt-mueller is correct but needs to be updated for Rails 4 with Sprockets 3+. There was a change in Sprockets that means the assets property is not present during initialisation. Instead you can do:

# config/initializers/slim.rb

Rails.application.config.after_initialize do |app|
  app.config.assets.configure do |env|
    env.register_engine(".slim", Slim::Template)
  end
end

Answer 2

Sorry I'm tardy to the party, but Dillon Buchanan answered this question here.

Go to the config/initializers directory and create a file like slim_assets.rb (or something similar) and copy-pasta the following line:

Rails.application.assets.register_engine('.slim', Slim::Template)

I've done something similar with great success with HAML (which I use to write templates for Rails/AngJS apps).