1 files changed, 22 insertions, 14 deletions
diff --git a/actionpack/lib/sprockets/assets.rake b/actionpack/lib/sprockets/assets.rake
index 01132d218f..acf2f256c2 100644
--- a/actionpack/lib/sprockets/assets.rake
+++ b/actionpack/lib/sprockets/assets.rake
@@ -1,24 +1,32 @@
 namespace :assets do
-  task :ensure_env do
-    ENV["RAILS_GROUPS"] ||= "assets"
-    ENV["RAILS_ENV"]    ||= "production"
-  end
-
   desc "Compile all the assets named in config.assets.precompile"
-  task :precompile => :ensure_env do
-    Rake::Task["environment"].invoke
-    Sprockets::Helpers::RailsHelper
+  task :precompile do
+    # We need to do this dance because RAILS_GROUPS is used
+    # too early in the boot process and changing here is already too late.
+    if ENV["RAILS_GROUPS"].to_s.empty? || ENV["RAILS_ENV"].to_s.empty?
+      ENV["RAILS_GROUPS"] ||= "assets"
+      ENV["RAILS_ENV"]    ||= "production"
+      Kernel.exec $0, *ARGV
+    else
+      Rake::Task["environment"].invoke
+
+      # Ensure that action view is loaded and the appropriate sprockets hooks get executed
+      ActionView::Base
+
+      # Always perform caching so that asset_path appends the timestamps to file references.
+      Rails.application.config.action_controller.perform_caching = true
 
-    assets = Rails.application.config.assets.precompile
-    # Always perform caching so that asset_path appends the timestamps to file references.
-    Rails.application.config.action_controller.perform_caching = true
-    Rails.application.assets.precompile(*assets)
+      config = Rails.application.config
+      assets = config.assets.precompile.dup
+      assets << {:to => File.join(Rails.public_path, config.assets.prefix)}
+      Rails.application.assets.precompile(*assets)
+    end
   end
 
   desc "Remove compiled assets"
   task :clean => [:environment, 'tmp:cache:clear'] do
-    assets = Rails.application.config.assets
-    public_asset_path = Rails.public_path + assets.prefix
+    config = Rails.application.config
+    public_asset_path = File.join(Rails.public_path, config.assets.prefix)
     rm_rf public_asset_path, :secure => true
   end
 end