#
 # Author: Raimonds Simanovskis, http://blog.rayapps.com/
 # Source URL: https://github.com/rsim/blog.rayapps.com/blob/master/_plugins/pygments_cache_patch.rb
 #
 
 require 'fileutils'
 require 'digest/md5'
 

 PYGMENTS_CACHE_DIR = File.expand_path('../../_code_cache', __FILE__)

 FileUtils.mkdir_p(PYGMENTS_CACHE_DIR)
 
 Jekyll::HighlightBlock.class_eval do
   def render_pygments(context, code)
     if defined?(PYGMENTS_CACHE_DIR)
       path = File.join(PYGMENTS_CACHE_DIR, "#{@lang}-#{Digest::MD5.hexdigest(code)}.html")
       if File.exist?(path)
         highlighted_code = File.read(path)
       else
         highlighted_code = Albino.new(code, @lang).to_s(@options)
         File.open(path, 'w') {|f| f.print(highlighted_code) }
       end
     else
       highlighted_code = Albino.new(code, @lang).to_s(@options)
     end
     output = add_code_tags(highlighted_code, @lang)
     output = context["pygments_prefix"] + output if context["pygments_prefix"]
     output = output + context["pygments_suffix"] if context["pygments_suffix"]
     output
   end
 end