CoffeeScript template handler for Rails 3.

coffee_script.rb

# lib/action_view/template/handlers/coffee_script.rb
module ActionView
  class Template
    module Handlers
      class CoffeeScript
        def call template
          ::CoffeeScript.compile(template.source).inspect
        end
      end
    end
  end
end

Gemfile

gem 'coffee-script'
gem 'rails_assets', :git => 'git://github.com/wycats/rails_assets.git'

template_handlers.rb

# config/initializers/template_handlers.rb
require 'action_view/template/handlers/coffee_script'

ActionView::Template.register_template_handler :coffee,
  ActionView::Template::Handlers::CoffeeScript.new

Replace this:

    ::CoffeeScript.compile(source).inspect

with this:

    ::CoffeeScript.compile(template.source).inspect

Typos are fun. Fixed, thanks :)