Include NWMatcher as a submodule.

.gitmodules

@@ -14,3 +14,6 @@
 [submodule "vendor/sizzle/sizzle"]
 	path = vendor/sizzle/sizzle
 	url = git://github.com/jeresig/sizzle.git
+[submodule "vendor/nwmatcher/nwmatcher"]
+	path = vendor/nwmatcher/nwmatcher
+	url = git://github.com/dperini/nwmatcher.git

Rakefile

@@ -40,6 +40,7 @@ module PrototypeHelper
   def self.sprocketize(path, source, destination = nil, strip_comments = true)
     require_sprockets
     require_sizzle
+    require_nwmatcher
     secretary = Sprockets::Secretary.new(
       :root           => File.join(ROOT_DIR, path),
       :load_path      => self.load_path,
@@ -100,6 +101,12 @@ module PrototypeHelper
     end
   end
   
+  def self.require_nwmatcher
+    if !File.exists?(File.join(ROOT_DIR, 'vendor', 'nwmatcher', 'src', 'nwmatcher.js'))
+      exit unless get_submodule("NWMmatcher", "nwmatcher/nwmatcher")
+    end
+  end
+  
   def self.get_submodule(name, path)
     require_git
     puts "\nYou seem to be missing #{name}. Obtaining it via git...\n\n"

vendor/nwmatcher/nwmatcher

@@ -0,0 +1 @@
+Subproject commit c9f5d5d4fc4ca294477f803bb8d688a8d45de664

vendor/nwmatcher/selector_engine.js

@@ -1,5 +1,5 @@
 Prototype._original_nw = window.NW;
-//= require <nwmatcher-1.1.1>
+//= require "nwmatcher/src/nwmatcher"
 Prototype.NW = window.NW;
 
 // Restore globals.
@@ -7,14 +7,8 @@ window.NW = Prototype._original_nw;
 delete Prototype._original_nw;
 
 Prototype.Selector = (function(NW) {
-  function extend(elements) {
-    for (var i = 0, length = elements.length; i < length; i++)
-      elements[i] = Element.extend(elements[i]);
-    return elements;
-  }
-  
   function select(selector, scope) {
-    return extend(NW.select(selector, scope || document));
+    return NW.select(selector, scope || document, null, Element.extend);
   }
 
   function filter(elements, selector) {