Redcarptでgfmしたときの

gistfile1.rb

  def md(content)
    gfm.render(content).html_safe
  end

  private
  class XHTMLwithPygments < Redcarpet::Render::XHTML
    def block_code(code, language)
      ::Pygments.highlight(code, lexer: language)
    end
    
    def postprocess(document)
      document.gsub(/:([a-z0-9\+\-_]+):/) do |match|
        if Emoji.names.include?($1)
          "<img src='/assets/emoji/#{$1}.png'>"
        else
          match
        end
      end
    end
  end

  def gfm
    ::Redcarpet::Markdown.new(
      XHTMLwithPygments,
      no_intra_emphasis: true,
      tables: true,
      fenced_code_blocks: true,
      autolink: true,
      strikethrough: true,
      lax_spacing: true,
      space_after_headers: true,
      hard_wrap: true
    )
  end