uggo.rb

require 'haml'
require 'haml/html'
require 'httparty'

module Jekyll
  class SyntaxBlock < Liquid::Block
    def initialize(tag_name, language, tokens)
      super
      @language = language
    end

    # Typical output of render
    # :plain
    #   <div class="highlight"><pre><span class="k">class</span> <span class="nc">Boop</span>
    #     <span class="k">def</span> <span class="nf">something</span><span class="p">(</span><span class="n">a</span><span class="p">,</span><span class="n">b</span><span class="p">,</span><span class="n">c</span><span class="p">)</span>
    #     <span class="k">end</span>
    #   <span class="k">end</span>
    #   </pre></div>
    def render(context)
      html_syntax = indent(code_to_html(super.join,@language))
      ":plain\n#{html_syntax}"
    end

    # Typical output of code_to_html:
    # <div class="highlight"><pre><span class="k">class</span> <span class="nc">Boop</span>
    #   <span class="k">def</span> <span class="nf">something</span><span class="p">(</span><span class="n">a</span><span class="p">,</span><span class="n">b</span><span class="p">,</span><span class="n">c</span><span class="p">)</span>
    #   <span class="k">end</span>
    # <span class="k">end</span>
    # </pre></div>
    # 
    def code_to_html(code, language)
      response = HTTParty.post('http://pygments.appspot.com/', :body => {'lang'=>language.strip, 'code'=>code})
      puts "An error occured while processing this #{language} code: #{code}" unless response.success?
      response.body
    end

    # Typical output of indent
    #   <div class="highlight"><pre><span class="k">class</span> <span class="nc">Boop</span>
    #     <span class="k">def</span> <span class="nf">something</span><span class="p">(</span><span class="n">a</span><span class="p">,</span><span class="n">b</span><span class="p">,</span><span class="n">c</span><span class="p">)</span>
    #     <span class="k">end</span>
    #   <span class="k">end</span>
    #   </pre></div>
    def indent(html)
      indented = html.gsub(/\n/, "\n  ")
      "  #{indented}"
    end
  end
end

Liquid::Template.register_tag('syntax', Jekyll::SyntaxBlock)