Create an :assets group in the Gemfile.

This group is required by default only on development and test
(you can change it on config/application.rb).

`rake assets:precompile` will automatically add the assets group
to Rails.groups (and consequently Bundler.require) and should work
transparently.

1 files changed, 10 insertions, 5 deletions

diff --git a/railties/lib/rails/tasks/assets.rake b/railties/lib/rails/tasks/assets.rake
index b872a54d08..ccd4d361bf 100644
--- a/railties/lib/rails/tasks/assets.rake
+++ b/railties/lib/rails/tasks/assets.rake
@@ -1,11 +1,16 @@
 namespace :assets do
   desc "Compile all the assets named in config.assets.precompile"
-  task :precompile => :environment do
-    # Give assets access to asset_path
-    Sprockets::Helpers::RailsHelper
+  task :precompile do
+    if ENV["RAILS_GROUPS"].to_s.empty?
+      ENV["RAILS_GROUPS"] = "assets"
+      Kernel.exec $0, *ARGV
+    else
+      Rake::Task["environment"].invoke
+      Sprockets::Helpers::RailsHelper
 
-    assets = Rails.application.config.assets.precompile
-    Rails.application.assets.precompile(*assets)
+      assets = Rails.application.config.assets.precompile
+      Rails.application.assets.precompile(*assets)
+    end
   end
 
   desc "Remove compiled assets"