5 files changed, 54 insertions, 1 deletions
diff --git a/railties/lib/rails/application.rb b/railties/lib/rails/application.rb
index 94819820bc..754b03258a 100644
--- a/railties/lib/rails/application.rb
+++ b/railties/lib/rails/application.rb
@@ -137,6 +137,35 @@ module Rails
       @config ||= Application::Configuration.new(find_root_with_flag("config.ru", Dir.pwd))
     end
 
+    def assets
+      @assets ||= build_asset_environment
+    end
+
+    def build_asset_environment
+      return unless config.asset_pipeline
+      require 'sprockets'
+      env = Sprockets::Environment.new(root.to_s)
+      env.static_root = root.join("public/assets")
+      env
+    end
+
+    initializer :add_sprockets_paths do |app|
+      if config.asset_pipeline
+        [
+         "app/javascripts",
+         "app/stylesheets",
+         "vendor/plugins/*/app/javascripts",
+         "vendor/plugins/*/app/stylesheets",
+         "vendor/plugins/*/javascripts",
+         "vendor/plugins/*/stylesheets"
+        ].each do |pattern|
+          Dir[app.root.join(pattern)].each do |dir|
+            app.assets.paths << dir
+          end
+        end
+      end
+    end
+
   protected
 
     def default_asset_path
diff --git a/railties/lib/rails/application/configuration.rb b/railties/lib/rails/application/configuration.rb
index c74bcbedf2..9e87714e4f 100644
--- a/railties/lib/rails/application/configuration.rb
+++ b/railties/lib/rails/application/configuration.rb
@@ -9,7 +9,8 @@ module Rails
                     :filter_parameters, :helpers_paths, :logger,
                     :preload_frameworks, :reload_plugins,
                     :secret_token, :serve_static_assets, :session_options,
-                    :time_zone, :whiny_nils
+                    :time_zone, :whiny_nils,
+                    :asset_pipeline, :precompile_assets
 
       attr_writer :log_level
 
@@ -28,6 +29,8 @@ module Rails
         @log_level                   = nil
         @middleware                  = app_middleware
         @generators                  = app_generators
+        @asset_pipeline              = false
+        @precompile_assets           = []
       end
 
       def compiled_asset_path
diff --git a/railties/lib/rails/application/finisher.rb b/railties/lib/rails/application/finisher.rb
index a45b61c99c..3cfd8f5707 100644
--- a/railties/lib/rails/application/finisher.rb
+++ b/railties/lib/rails/application/finisher.rb
@@ -33,6 +33,20 @@ module Rails
         end
       end
 
+      initializer :add_sprockets_route do |app|
+        if config.asset_pipeline
+          app.routes.append do
+            mount app.assets => "/assets"
+          end
+        end
+      end
+
+      initializer :set_sprockets_logger do |app|
+        if config.asset_pipeline
+          app.assets.logger = Rails.logger
+        end
+      end
+
       initializer :build_middleware_stack do
         build_middleware_stack
       end
diff --git a/railties/lib/rails/tasks.rb b/railties/lib/rails/tasks.rb
index af52014728..4d09b0c2c0 100644
--- a/railties/lib/rails/tasks.rb
+++ b/railties/lib/rails/tasks.rb
@@ -3,6 +3,7 @@ $VERBOSE = nil
 # Load Rails rakefile extensions
 %w(
   annotations
+  assets
   documentation
   framework
   log
diff --git a/railties/lib/rails/tasks/assets.rake b/railties/lib/rails/tasks/assets.rake
new file mode 100644
index 0000000000..8c85180b34
--- /dev/null
+++ b/railties/lib/rails/tasks/assets.rake
@@ -0,0 +1,6 @@
+namespace :assets do
+  task :compile => :environment do
+    assets = Rails.application.config.precompile_assets
+    Rails.application.assets.precompile(*assets)
+  end
+end