module Middleman::Renderers::ERb

def registered(app)
  # Setup a default ERb engine
  app.config.define_setting :erb_engine, :erb, 'The engine to use for rendering ERb templates'
  app.config.define_setting :erb_engine_prefix, ::Tilt, 'The parent module for ERb template engines'
  app.before_configuration do
    template_extensions :erb => :html
  end
  # After config
  app.after_configuration do
    # Find the user's prefered engine
    # Convert symbols to classes
    if config[:erb_engine].is_a? Symbol
      engine = engine.to_s
      engine = engine == "erb" ? "ERB" : engine.camelize
      config[:erb_engine] = config[:erb_engine_prefix].const_get("#{engine}Template")
    end
    # Tell Tilt to use the preferred engine
    ::Tilt.prefer(config[:erb_engine])
  end
end