def find_resource_entry(filename, opts={}, seen=nil)
      extname = File.extname(filename)
      rootname = filename.gsub(/#{extname}$/,'')
      entry_extname = entry_rootname = nil

      ret = entries_for(:resource, opts.merge(:hidden => :none)).reject do |entry|
        entry_extname = File.extname(entry.filename)
        entry_rootname = entry.filename.gsub(/#{entry_extname}$/,'')

        ext_match = (extname.nil? || extname.size == 0) || (entry_extname == extname)
        !(ext_match && (/#{rootname}$/ =~ entry_rootname))
      end

      ret = ret.first

      if ret.nil?
        seen = Set.new if seen.nil?
        seen << self
        all_required_bundles.each do |bundle|
          next if seen.include?(bundle) # avoid recursion
          ret = bundle.find_resource_entry(filename, opts, seen)
          return ret unless ret.nil?
        end
      end
      return ret
    end