class Thor::Runner

def save_yaml(yaml)
  yaml_file = File.join(thor_root, 'thor.yml')
  unless File.exist?(yaml_file)
    FileUtils.mkdir_p(thor_root)
    yaml_file = File.join(thor_root, 'thor.yml')
    FileUtils.touch(yaml_file)
  end
  File.open(yaml_file, 'w') { |f| f.puts yaml.to_yaml }
end