Create index before passing reference to router

Author: josh

lib/sprockets/railtie.rb

@@ -100,21 +100,21 @@ def configure(&block)
         end
       end
 
-      if app.config.assets.compile
-        if app.routes.respond_to?(:prepend)
-          app.routes.prepend do
-            mount app.assets => app.config.assets.prefix
-          end
-        end
-      end
-
       # No more configuration changes at this point.
       # With cache classes on, Sprockets won't check the FS when files
       # change. Preferable in production when the FS only changes on
       # deploys when the app restarts.
       if app.config.cache_classes
         app.assets = app.assets.index
       end
+
+      if app.config.assets.compile
+        if app.routes.respond_to?(:prepend)
+          app.routes.prepend do
+            mount app.assets => app.config.assets.prefix
+          end
+        end
+      end
     end
   end
 end