Pass app reference to rake task

Author: josh

lib/sprockets/rails/task.rb

@@ -5,7 +5,45 @@
 module Sprockets
   module Rails
     class Task < Rake::SprocketsTask
-      attr_accessor :cache_path
+      attr_accessor :app
+
+      def initialize(app = nil)
+        self.app = app
+        super()
+      end
+
+      def environment
+        if app
+          app.assets
+        else
+          super
+        end
+      end
+
+      def output
+        if app
+          File.join(app.root, 'public', app.config.assets.prefix)
+        else
+          super
+        end
+      end
+
+      def assets
+        if app
+          app.config.assets.precompile
+        else
+          super
+        end
+      end
+
+      def cache_path
+        if app
+          "#{app.config.root}/tmp/cache/assets"
+        else
+          @cache_path
+        end
+      end
+      attr_writer :cache_path
 
       def define
         namespace :assets do

lib/sprockets/railtie.rb

@@ -58,13 +58,7 @@ def configure(&block)
 
     rake_tasks do |app|
       require 'sprockets/rails/task'
-
-      Sprockets::Rails::Task.new do |t|
-        t.environment = lambda { app.assets }
-        t.output      = File.join(app.root, 'public', app.config.assets.prefix)
-        t.assets      = app.config.assets.precompile
-        t.cache_path  = "#{app.config.root}/tmp/cache/assets"
-      end
+      Sprockets::Rails::Task.new(app)
     end
 
     config.after_initialize do |app|