gistfile1.rb

get '/?' do
  haml_with_erb_layout :index
end

def haml_with_erb_layout(template, options={})
  require 'haml' unless defined? ::Haml
  require 'erb' unless defined? ::ERB
  # options[:options] ||= self.class.haml if self.class.respond_to? :haml
  data = lookup_template(:haml, template, options)
  output = __send__("render_haml", template, data, options)
  layout, data = lookup_layout(:erb, options)
  if layout
    __send__("render_erb", layout, data, options) { output }
  else
    output
  end
end