Redcarpet+Rouge converter for Jekyll

redcartper_rouge.rb

# _plugins/redcarpet_rouge.rb

require 'redcarpet'
require 'rouge'
require 'rouge/plugins/redcarpet'

module Jekyll
  class RedcarpetRouge < Converter
    safe true
    priority :high

    def matches(ext)
      ext =~ /^.md(own)?$/i
    end

    def output_ext(ext)
      ".html"
    end

    def initialize(config)
      super
      @redcarpet_extensions = {}
      @config['redcarpet']['extensions'].each { |e| @redcarpet_extensions[e.to_sym] = true }

      @redcarpet_extensions = @config['redcarpet']['extensions'].each_with_object({}) do |e, hash|
        hash[e.to_sym] = true
      end

      @renderer ||= Class.new(Redcarpet::Render::HTML) do
        include Rouge::Plugins::Redcarpet
      end
    end

    def convert(content)
      @renderer.send :include, Redcarpet::Render::SmartyPants if @redcarpet_extensions[:smart]
      markdown = Redcarpet::Markdown.new(@renderer.new(@redcarpet_extensions), @redcarpet_extensions)
      markdown.render(content)
    end
  end
end