railties/lib/rails/generators/app_base.rb

@@ -134,15 +134,17 @@ def rails_gemfile_entry
             gem 'arel',      :git => 'git://github.com/rails/arel.git'
             gem 'rack',      :git => 'git://github.com/rack/rack.git'
             gem 'sprockets', :git => "git://github.com/sstephenson/sprockets.git"
-            gem 'json'       # Sprockets dependency
+            gem 'coffee-script'
+            gem 'json'       # CoffeeScript and Sprockets dependency
           GEMFILE
         elsif options.edge?
           <<-GEMFILE.strip_heredoc
             gem 'rails',     :git => 'git://github.com/rails/rails.git'
             gem 'arel',      :git => 'git://github.com/rails/arel.git'
             gem 'rack',      :git => 'git://github.com/rack/rack.git'
             gem 'sprockets', :git => "git://github.com/sstephenson/sprockets.git"
-            gem 'json'       # Sprockets dependency
+            gem 'coffee-script'
+            gem 'json'       # CoffeeScript and Sprockets dependency
           GEMFILE
         else
           <<-GEMFILE.strip_heredoc

railties/lib/rails/generators/rails/app/templates/app/assets/javascripts/application.js.coffee

@@ -0,0 +1,6 @@
+# Place your application-specific JavaScript functions and classes here
+# FIXME: Tell people how Sprockets and CoffeeScript works
+#
+#= require jquery
+#= require jquery_ujs
+#= require_tree .