redcarpet2_markdown.rb

require 'fileutils'
require 'digest/md5'
require 'redcarpet'
require 'pygments'

class Redcarpet2Markdown < Redcarpet::Render::HTML
  def block_code(code, lang)
    lang = lang || "text"
    colorized = Pygments.highlight(code, :lexer => lang, :options => { :style => "default", :encoding => 'utf-8'})
    add_code_tags(colorized, lang)
  end

  def add_code_tags(code, lang)
    code.sub(/<pre>/, "<pre><code class=\"#{lang}\">").
         sub(/<\/pre>/, "</code></pre>")
  end
end

class Jekyll::MarkdownConverter
  def extensions
    Hash[ *@config['redcarpet']['extensions'].map {|e| [e.to_sym, true] }.flatten ]
  end

  def markdown
    @markdown ||= Redcarpet::Markdown.new(Redcarpet2Markdown.new(extensions), extensions)
  end

  def convert(content)
    return super unless @config['markdown'] == 'redcarpet2'
    markdown.render(content)
  end
end