Move Coffee generators and templates to Coffee Railtie and create javascript_engine ("js") for apps that remove Coffee gem

actionpack/lib/sprockets/railtie.rb

@@ -3,15 +3,6 @@ module Sprockets
 
   # TODO: Get rid of config.assets.enabled
   class Railtie < ::Rails::Railtie
-    def self.using_coffee?
-      require 'coffee-script'
-      defined?(CoffeeScript)
-    rescue LoadError
-      false
-    end
-
-    config.app_generators.javascript_engine :coffee if using_coffee?
-
     rake_tasks do
       load "sprockets/assets.rake"
     end

railties/lib/rails/generators.rb

@@ -53,7 +53,7 @@ module Rails
         :helper => true,
         :integration_tool => nil,
         :javascripts => true,
-        :javascript_engine => nil,
+        :javascript_engine => :js,
         :orm => false,
         :performance_tool => nil,
         :resource_controller => :controller,

railties/lib/rails/generators/js/assets/assets_generator.rb

@@ -0,0 +1,13 @@
+require "rails/generators/named_base"
+
+module Js
+  module Generators
+    class AssetsGenerator < Rails::Generators::NamedBase
+      source_root File.expand_path("../templates", __FILE__)
+
+      def copy_javascript
+        copy_file "javascript.js", File.join('app/assets/javascripts', class_path, "#{file_name}.js")
+      end
+    end
+  end
+end

railties/lib/rails/generators/js/assets/templates/javascript.js

@@ -0,0 +1,2 @@
+// Place all the behaviors and hooks related to the matching controller here.
+// All this logic will automatically be available in application.js.

railties/lib/rails/generators/rails/app/templates/Gemfile

@@ -11,7 +11,7 @@ source 'http://rubygems.org'
 # in production environments by default.
 group :assets do
   gem 'sass-rails'
-  gem 'coffee-script'
+  gem 'coffee-rails'
   gem 'uglifier'
 end
 

railties/lib/rails/generators/rails/assets/assets_generator.rb

@@ -7,21 +7,14 @@ module Rails
       class_option :javascript_engine, :desc => "Engine for JavaScripts"
       class_option :stylesheet_engine, :desc => "Engine for Stylesheets"
 
-      def create_javascript_files
-        return unless options.javascripts?
-        copy_file "javascript.#{javascript_extension}",
-          File.join('app/assets/javascripts', class_path, "#{asset_name}.#{javascript_extension}")
-      end
-
       protected
 
       def asset_name
         file_name
       end
 
-      def javascript_extension
-        options.javascript_engine.present? ?
-          "js.#{options.javascript_engine}" : "js"
+      hook_for :javascript_engine do |javascript_engine|
+        invoke javascript_engine, [name] if options[:javascripts]
       end
 
       hook_for :stylesheet_engine do |stylesheet_engine|

railties/lib/rails/generators/rails/assets/templates/javascript.js.coffee

@@ -1,3 +0,0 @@
-# Place all the behaviors and hooks related to the matching controller here.
-# All this logic will automatically be available in application.js.
-# You can use CoffeeScript in this file: http://jashkenas.github.com/coffee-script/

railties/test/generators/assets_generator_test.rb

@@ -8,19 +8,13 @@ class AssetsGeneratorTest < Rails::Generators::TestCase
 
   def test_assets
     run_generator
-    assert_file "app/assets/javascripts/posts.js.coffee"
+    assert_file "app/assets/javascripts/posts.js"
     assert_file "app/assets/stylesheets/posts.css"
   end
 
   def test_skipping_assets
     content = run_generator ["posts", "--no-stylesheets", "--no-javascripts"]
-    assert_no_file "app/assets/javascripts/posts.js.coffee"
+    assert_no_file "app/assets/javascripts/posts.js"
     assert_no_file "app/assets/stylesheets/posts.css"
   end
-
-  def test_vanilla_assets
-    run_generator ["posts", "--no-javascript-engine"]
-    assert_file "app/assets/javascripts/posts.js"
-    assert_file "app/assets/stylesheets/posts.css"
-  end
 end

railties/test/generators/controller_generator_test.rb

@@ -39,7 +39,7 @@ class ControllerGeneratorTest < Rails::Generators::TestCase
 
   def test_invokes_assets
     run_generator
-    assert_file "app/assets/javascripts/account.js.coffee"
+    assert_file "app/assets/javascripts/account.js"
     assert_file "app/assets/stylesheets/account.css"
   end
 

railties/test/generators/scaffold_generator_test.rb

@@ -81,7 +81,7 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
 
     # Assets
     assert_file "app/assets/stylesheets/scaffold.css"
-    assert_file "app/assets/javascripts/product_lines.js.coffee"
+    assert_file "app/assets/javascripts/product_lines.js"
     assert_file "app/assets/stylesheets/product_lines.css"
   end
 
@@ -114,7 +114,7 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
 
     # Assets
     assert_file "app/assets/stylesheets/scaffold.css", /:visited/
-    assert_no_file "app/assets/javascripts/product_lines.js.coffee"
+    assert_no_file "app/assets/javascripts/product_lines.js"
     assert_no_file "app/assets/stylesheets/product_lines.css"
   end
 
@@ -190,7 +190,7 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
 
     # Assets
     assert_file "app/assets/stylesheets/scaffold.css", /:visited/
-    assert_file "app/assets/javascripts/admin/roles.js.coffee"
+    assert_file "app/assets/javascripts/admin/roles.js"
     assert_file "app/assets/stylesheets/admin/roles.css"
   end
 
@@ -224,7 +224,7 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
 
     # Assets
     assert_file "app/assets/stylesheets/scaffold.css"
-    assert_no_file "app/assets/javascripts/admin/roles.js.coffee"
+    assert_no_file "app/assets/javascripts/admin/roles.js"
     assert_no_file "app/assets/stylesheets/admin/roles.css"
   end
 
@@ -246,28 +246,21 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
   def test_scaffold_generator_no_assets
     run_generator [ "posts", "--no-assets" ]
     assert_file "app/assets/stylesheets/scaffold.css"
-    assert_no_file "app/assets/javascripts/posts.js.coffee"
+    assert_no_file "app/assets/javascripts/posts.js"
     assert_no_file "app/assets/stylesheets/posts.css"
   end
 
   def test_scaffold_generator_no_stylesheets
     run_generator [ "posts", "--no-stylesheets" ]
     assert_no_file "app/assets/stylesheets/scaffold.css"
-    assert_file "app/assets/javascripts/posts.js.coffee"
+    assert_file "app/assets/javascripts/posts.js"
     assert_no_file "app/assets/stylesheets/posts.css"
   end
 
   def test_scaffold_generator_no_javascripts
     run_generator [ "posts", "--no-javascripts" ]
     assert_file "app/assets/stylesheets/scaffold.css"
-    assert_no_file "app/assets/javascripts/posts.js.coffee"
-    assert_file "app/assets/stylesheets/posts.css"
-  end
-
-  def test_scaffold_generator_no_engines
-    run_generator [ "posts", "--no-javascript-engine" ]
-    assert_file "app/assets/stylesheets/scaffold.css"
-    assert_file "app/assets/javascripts/posts.js"
+    assert_no_file "app/assets/javascripts/posts.js"
     assert_file "app/assets/stylesheets/posts.css"
   end