ruby script for pretty printing JSON and XML inside of octopress {% codeblock %} tags

gistfile1.rb

require 'rubygems'
require 'json'
require 'nokogiri'
require 'nokogiri-pretty'

markdown_files = File.join("/docs/source", "**", "*.md")

Dir.glob markdown_files do |markdown_file|  
  next if markdown_file == '.' or markdown_file == '..'
  path = markdown_file
  file = File.open(path)
  contents = file.read

  #Pretty print the JSON
  contents.gsub!(/({%\s?codeblock lang:javascript\s?%})(.*?)({\%\s?endcodeblock\s?%})/m) do |match|
    begin
      json = JSON.parse($2)
    rescue
      puts "invalid JSON or non-JSON javascript block in #{markdown_file}: #{$2})"
      next
    end
      puts $1 + JSON.pretty_generate(json) + $3
      $1 + "\n" + JSON.pretty_generate(json) + "\n" + $3
  end

  #Pretty print the XML
  contents.gsub!(/({%\s?codeblock lang:xml\s?%})(.*?)({\%\s?endcodeblock\s?%})/m) do |match|
    begin
      xml = Nokogiri.XML($2)
    rescue
      puts "invalid XML block in #{markdown_file}: #{$2})"
      next
    end
      puts $1 + xml.human + $3
      $1 + "\n" + xml.human + "\n" + $3
  end

 
  output_path = 'output/' + File.basename(file)
  file = File.new(output_path,"w")
  file.write(contents)

  file.close
end