convert cable.coffee to cable.js

In order to eliminate the dependecy of CoffeeScript.

actioncable/lib/rails/generators/channel/USAGE

@@ -3,7 +3,7 @@ Description:
     Stubs out a new cable channel for the server (in Ruby) and client (in CoffeeScript).
     Pass the channel name, either CamelCased or under_scored, and an optional list of channel actions as arguments.
 
-    Note: Turn on the cable connection in app/assets/javascript/cable.coffee after generating any channels.
+    Note: Turn on the cable connection in app/assets/javascript/cable.js after generating any channels.
 
 Example:
 ========

railties/lib/rails/generators/rails/app/app_generator.rb

@@ -332,7 +332,7 @@ def delete_active_record_initializers_skipping_active_record
       def delete_action_cable_files_skipping_action_cable
         if options[:skip_action_cable]
           remove_file 'config/cable.yml'
-          remove_file 'app/assets/javascripts/cable.coffee'
+          remove_file 'app/assets/javascripts/cable.js'
           remove_dir 'app/channels'
         end
       end

railties/lib/rails/generators/rails/app/templates/app/assets/javascripts/cable.coffee

-# Action Cable provides the framework to deal with WebSockets in Rails.
-# You can generate new channels where WebSocket features live using the rails generate channel command.
-#
-#= require action_cable
-#= require_self
-#= require_tree ./channels
-
-@App ||= {}
-App.cable = ActionCable.createConsumer()

railties/lib/rails/generators/rails/app/templates/app/assets/javascripts/cable.js

+// Action Cable provides the framework to deal with WebSockets in Rails.
+// You can generate new channels where WebSocket features live using the rails generate channel command.
+//
+//= require action_cable
+//= require_self
+//= require_tree ./channels
+
+(function() {
+  this.App || (this.App = {});
+
+  App.cable = ActionCable.createConsumer();
+
+}).call(this);

railties/test/application/rake_test.rb

@@ -118,7 +118,7 @@ def test_should_not_eager_load_model_for_rake
     end
 
     def test_code_statistics_sanity
-      assert_match "Code LOC: 16     Test LOC: 0     Code to Test Ratio: 1:0.0",
+      assert_match "Code LOC: 18     Test LOC: 0     Code to Test Ratio: 1:0.0",
         Dir.chdir(app_path){ `bin/rails stats` }
     end
 

railties/test/generators/app_generator_test.rb

@@ -463,7 +463,7 @@ def test_generator_if_skip_action_cable_is_given
     run_generator [destination_root, "--skip-action-cable"]
     assert_file "config/application.rb", /#\s+require\s+["']action_cable\/engine["']/
     assert_no_file "config/cable.yml"
-    assert_no_file "app/assets/javascripts/cable.coffee"
+    assert_no_file "app/assets/javascripts/cable.js"
     assert_no_file "app/channels"
     assert_file "Gemfile" do |content|
       assert_no_match(/redis/, content)