Make generators more modular, add hooks and improve test suite.

Gemfile

@@ -13,6 +13,7 @@ gem "rack-test", :git => "git://github.com/brynary/rack-test.git"
 
 gem "sprockets", :git => "git://github.com/sstephenson/sprockets.git"
 gem "coffee-script"
+gem "sass", ">= 3.0"
 
 gem "rake",  ">= 0.8.7"
 gem "mocha", ">= 0.9.8"

actionpack/lib/sprockets/railtie.rb

@@ -3,6 +3,23 @@ require "sprockets"
 # TODO: Move this to sprockets-rails
 # If so, we can move the require to a Gemfile and remove assets.enabled
 class Sprockets::Railtie < Rails::Railtie
+  def self.using_coffee?
+    require 'coffee-script'
+    defined?(CoffeeScript)
+  rescue LoadError
+    false
+  end
+
+  def self.using_scss?
+    require 'sass'
+    defined?(Sass)
+  rescue LoadError
+    false
+  end
+
+  config.app_generators.javascript_engine :coffee if using_coffee?
+  config.app_generators.stylesheet_engine :scss   if using_scss?
+
   # Configure ActionController to use sprockets.
   initializer "sprockets.set_configs", :after => "action_controller.set_configs" do |app|
     ActiveSupport.on_load(:action_controller) do

railties/lib/rails/generators.rb

@@ -24,9 +24,11 @@ module Rails
       :rails => {
         :actions => '-a',
         :orm => '-o',
+        :javascript_engine => '-je',
         :resource_controller => '-c',
         :scaffold_controller => '-c',
         :stylesheets => '-y',
+        :stylesheet_engine => '-se',
         :template_engine => '-e',
         :test_framework => '-t'
       },
@@ -43,15 +45,18 @@ module Rails
 
     DEFAULT_OPTIONS = {
       :rails => {
+        :assets => true,
         :force_plural => false,
         :helper => true,
-        :assets => true,
-        :orm => nil,
         :integration_tool => nil,
+        :javascripts => true,
+        :javascript_engine => nil,
+        :orm => nil,
         :performance_tool => nil,
         :resource_controller => :controller,
         :scaffold_controller => :scaffold_controller,
         :stylesheets => true,
+        :stylesheet_engine => nil,
         :test_framework => nil,
         :template_engine => :erb
       },

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

@@ -1,36 +1,38 @@
 module Rails
   module Generators
-    # TODO: Add hooks for using other asset pipelines, like Less
     class AssetsGenerator < NamedBase
-      def create_asset_files
+      class_option :javascripts, :type => :boolean, :desc => "Generate javascripts"
+      class_option :stylesheets, :type => :boolean, :desc => "Generate stylesheets"
+
+      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', "#{file_name}.#{javascript_extension}")
+          File.join('app/assets/javascripts', class_path, "#{asset_name}.#{javascript_extension}")
+      end
 
+      def create_stylesheet_files
+        return unless options.stylesheets?
         copy_file "stylesheet.#{stylesheet_extension}",
-          File.join('app/assets/stylesheets', "#{file_name}.#{stylesheet_extension}")
+          File.join('app/assets/stylesheets', class_path, "#{asset_name}.#{stylesheet_extension}")
+      end
+
+      protected
+
+      def asset_name
+        file_name
       end
 
-    private
       def javascript_extension
-        using_coffee? ? "js.coffee" : "js"
-      end
-    
-      def using_coffee?
-        require 'coffee-script'
-        defined?(CoffeeScript)
-      rescue LoadError
-        false
+        options.javascript_engine.present? ?
+          "js.#{options.javascript_engine}" : "js"
       end
 
       def stylesheet_extension
-        using_sass? ? "css.scss" : "css"
-      end
-      
-      def using_sass?
-        require 'sass'
-        defined?(Sass)
-      rescue LoadError
-        false
+        options.stylesheet_engine.present? ?
+          "css.#{options.stylesheet_engine}" : "css"
       end
     end
   end

railties/lib/rails/generators/rails/scaffold/scaffold_generator.rb

@@ -6,8 +6,27 @@ module Rails
       remove_hook_for :resource_controller
       remove_class_option :actions
 
+      class_option :stylesheets, :type => :boolean, :desc => "Generate stylesheets"
+      class_option :stylesheet_engine, :desc => "Engine for stylesheets"
+
       hook_for :scaffold_controller, :required => true
-      hook_for :stylesheets
+
+      def copy_stylesheets_file
+        if behavior == :invoke && options.stylesheets?
+          template "scaffold.#{stylesheet_extension}", "app/assets/stylesheets/scaffold.#{stylesheet_extension}"
+        end
+      end
+
+      hook_for :assets do |assets|
+        invoke assets, [controller_name]
+      end
+
+      private
+
+      def stylesheet_extension
+        options.stylesheet_engine.present? ?
+          "css.#{options.stylesheet_engine}" : "css"
+      end
     end
   end
 end

railties/lib/rails/generators/rails/stylesheets/USAGE

@@ -1,5 +0,0 @@
-Description:
-    Copies scaffold stylesheets to public/stylesheets/.
-
-Examples:
-    `rails generate stylesheets`

railties/lib/rails/generators/rails/stylesheets/stylesheets_generator.rb

@@ -1,23 +0,0 @@
-module Rails
-  module Generators
-    class StylesheetsGenerator < Base
-      def copy_stylesheets_file
-        if behavior == :invoke
-          template "scaffold.#{stylesheet_extension}", "app/assets/stylesheets/scaffold.#{stylesheet_extension}"
-        end
-      end
-
-    private
-      def stylesheet_extension
-        using_sass? ? "css.scss" : "css"
-      end
-
-      def using_sass?
-        require 'sass'
-        defined?(Sass)
-      rescue LoadError
-        false
-      end
-    end
-  end
-end

railties/test/generators/scaffold_generator_test.rb

@@ -79,8 +79,10 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
     assert_file "app/helpers/product_lines_helper.rb"
     assert_file "test/unit/helpers/product_lines_helper_test.rb"
 
-    # Stylesheets
-    assert_file "public/stylesheets/scaffold.css"
+    # Assets
+    assert_file "app/assets/stylesheets/scaffold.css.scss"
+    assert_file "app/assets/javascripts/product_lines.js.coffee"
+    assert_file "app/assets/stylesheets/product_lines.css.scss"
   end
 
   def test_scaffold_on_revoke
@@ -110,8 +112,10 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
     assert_no_file "app/helpers/product_lines_helper.rb"
     assert_no_file "test/unit/helpers/product_lines_helper_test.rb"
 
-    # Stylesheets (should not be removed)
-    assert_file "public/stylesheets/scaffold.css"
+    # Assets
+    assert_file "app/assets/stylesheets/scaffold.css.scss", /&:visited/
+    assert_no_file "app/assets/javascripts/product_lines.js.coffee"
+    assert_no_file "app/assets/stylesheets/product_lines.css.scss"
   end
 
   def test_scaffold_with_namespace_on_invoke
@@ -184,8 +188,10 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
     assert_file "app/helpers/admin/roles_helper.rb"
     assert_file "test/unit/helpers/admin/roles_helper_test.rb"
 
-    # Stylesheets
-    assert_file "public/stylesheets/scaffold.css"
+    # Assets
+    assert_file "app/assets/stylesheets/scaffold.css.scss", /&:visited/
+    assert_file "app/assets/javascripts/admin/roles.js.coffee"
+    assert_file "app/assets/stylesheets/admin/roles.css.scss"
   end
 
   def test_scaffold_with_namespace_on_revoke
@@ -216,8 +222,10 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
     assert_no_file "app/helpers/admin/roles_helper.rb"
     assert_no_file "test/unit/helpers/admin/roles_helper_test.rb"
 
-    # Stylesheets (should not be removed)
-    assert_file "public/stylesheets/scaffold.css"
+    # Assets
+    assert_file "app/assets/stylesheets/scaffold.css.scss"
+    assert_no_file "app/assets/javascripts/admin/roles.js.coffee"
+    assert_no_file "app/assets/stylesheets/admin/roles.css.scss"
   end
 
   def test_scaffold_generator_on_revoke_does_not_mutilate_legacy_map_parameter
@@ -235,6 +243,34 @@ class ScaffoldGeneratorTest < Rails::Generators::TestCase
     assert_file "config/routes.rb", /\.routes\.draw do\s*\|map\|\s*$/
   end
 
+  def test_scaffold_generator_no_assets
+    run_generator [ "posts", "--no-assets" ]
+    assert_file "app/assets/stylesheets/scaffold.css.scss"
+    assert_no_file "app/assets/javascripts/posts.js.coffee"
+    assert_no_file "app/assets/stylesheets/posts.css.scss"
+  end
+
+  def test_scaffold_generator_no_stylesheets
+    run_generator [ "posts", "--no-stylesheets" ]
+    assert_no_file "app/assets/stylesheets/scaffold.css.scss"
+    assert_file "app/assets/javascripts/posts.js.coffee"
+    assert_no_file "app/assets/stylesheets/posts.css.scss"
+  end
+
+  def test_scaffold_generator_no_javascripts
+    run_generator [ "posts", "--no-javascripts" ]
+    assert_file "app/assets/stylesheets/scaffold.css.scss"
+    assert_no_file "app/assets/javascripts/posts.js.coffee"
+    assert_file "app/assets/stylesheets/posts.css.scss"
+  end
+
+  def test_scaffold_generator_no_negines
+    run_generator [ "posts", "--no-javascript-engine", "--no-stylesheet-engine" ]
+    assert_file "app/assets/stylesheets/scaffold.css"
+    assert_file "app/assets/javascripts/posts.js"
+    assert_file "app/assets/stylesheets/posts.css"
+  end
+
   def test_scaffold_generator_outputs_error_message_on_missing_attribute_type
     content = capture(:stderr) { run_generator ["post", "title:string", "body"]}
     assert_match(/Missing type for attribute 'body'/, content)

railties/test/generators/stylesheets_generator_test.rb

@@ -1,23 +0,0 @@
-require 'generators/generators_test_helper'
-require 'rails/generators/rails/stylesheets/stylesheets_generator'
-
-class StylesheetsGeneratorTest < Rails::Generators::TestCase
-  include GeneratorsTestHelper
-
-  def test_copy_scss_stylesheet
-    self.generator_class.any_instance.stubs(:using_sass?).returns(true)
-    run_generator
-    assert_file "app/assets/stylesheets/scaffold.css.scss"
-  end
-
-  def test_copy_css_stylesheet
-    run_generator
-    assert_file "app/assets/stylesheets/scaffold.css"
-  end
-
-  def test_stylesheets_are_not_deleted_on_revoke
-    run_generator
-    run_generator [], :behavior => :revoke
-    assert_file "app/assets/stylesheets/scaffold.css"
-  end
-end