A rake snippet for auto-erb goodness

Rakefile

class TiltHelper
  def initialize(prefix)
    @prefix = prefix
  end
  def include(partial)
    Tilt.new("#{@prefix}/#{partial}").render
  end
end

rule( /\.((?!erb$)([A-Za-z0-9]))+$/ =>
          [ proc { |t| "#{t}.erb" },
            proc { |t| FileList.new t.pathmap("%X/*.*")}]) do |t|
  puts "Processing ERB Template #{t.source} => #{t.name}"
  template = Tilt.new t.source
  helper = TiltHelper.new t.name.pathmap "%X"
  file = File.new t.name, 'w'
  file.write template.render helper
end