1 files changed, 13 insertions, 4 deletions
diff --git a/actionpack/lib/sprockets/railtie.rb b/actionpack/lib/sprockets/railtie.rb
index 0a2c8c1ea3..dc991636a1 100644
--- a/actionpack/lib/sprockets/railtie.rb
+++ b/actionpack/lib/sprockets/railtie.rb
@@ -18,15 +18,24 @@ module Sprockets
       require 'sprockets'
 
       app.assets = Sprockets::Environment.new(app.root.to_s) do |env|
-        env.static_root = File.join(app.root.join('public'), config.assets.prefix)
-        env.logger = ::Rails.logger
-        env.version = ::Rails.env + "#{'-' + config.assets.version if config.assets.version.present?}"
+        env.logger  = ::Rails.logger
+        env.version = ::Rails.env + "-#{config.assets.version}"
 
         if config.assets.cache_store != false
           env.cache = ActiveSupport::Cache.lookup_store(config.assets.cache_store) || ::Rails.cache
         end
       end
 
+      if config.assets.manifest
+        path = File.join(config.assets.manifest, "manifest.yml")
+      else
+        path = File.join(Rails.public_path, config.assets.prefix, "manifest.yml")
+      end
+
+      if File.exist?(path)
+        config.assets.digests = YAML.load_file(path)
+      end
+
       ActiveSupport.on_load(:action_view) do
         include ::Sprockets::Helpers::RailsHelper
 
@@ -62,7 +71,7 @@ module Sprockets
         mount app.assets => config.assets.prefix
       end
 
-      if config.action_controller.perform_caching
+      if config.assets.digest
         app.assets = app.assets.index
       end
     end