Use sprocket engine instead, handle pre-processing

lib/nodeify/java_script.rb

@@ -1,10 +1,25 @@
-require 'sprockets'
+require 'tilt'
+require 'sandbox'
 
 module Nodeify
-  class JavaScript < Sprockets::Processor
-    def render(context, options)
-      @source = `node -e "var browserify = require('browserify'), _ = process.stdout.write(browserify({ entry: '#{file}', require: { http: 'dkastner-http-browserify' } }).bundle());"`
-      @source
+  class JavaScript < Tilt::Template
+    attr_accessor :body
+
+    def initialize(*arg)
+      super
+    end
+
+    def prepare
+    end
+
+    def evaluate(context, options)
+      output = ''
+      Sandbox.play do |path|
+        file_path = File.join(path, File.basename(file))
+        File.open(file_path, 'w') { |f| f.puts data }
+        output = `node -e "var browserify = require('browserify'), _ = process.stdout.write(browserify({ entry: '#{file_path}', require: { http: 'dkastner-http-browserify' } }).bundle());"`
+      end
+      output
     end
   end
 end

lib/nodeify/rails.rb

@@ -7,8 +7,8 @@
 module Nodeify
   class Rails < Rails::Railtie
     initializer "nodeify.sprockets.environment" do |app|
-      app.assets.unregister_preprocessor 'application/javascript', Sprockets::DirectiveProcessor
-      app.assets.register_bundle_processor 'application/javascript', Nodeify::JavaScript
+      app.assets.unregister_processor 'application/javascript', Sprockets::DirectiveProcessor
+      app.assets.register_engine '.js', Nodeify::JavaScript
     end
   end
 end

nodeify.gemspec

@@ -18,7 +18,8 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
 
   s.add_dependency 'rails', '~> 3.1'
-  s.add_dependency 'sprockets'
+  s.add_dependency 'sandbox'
+  s.add_dependency 'tilt'
   s.add_development_dependency 'jeweler'
   s.add_development_dependency 'rspec'
 end