Markdown handler with erb support

rdiscount.rb

# put me in config/initializers/rdiscount.rb
class ActionView::Template
  class RDiscountHandler < Handler
    def self.erb_handler
      @@erb_handler ||= ActionView::Template.registered_template_handler(:erb)
    end

    def self.call(template)
      compiled_source = erb_handler.call(template)
      "::RDiscount.new(begin;#{compiled_source};end).to_html"
    end
  end

  register_template_handler :markdown, RDiscountHandler
end