# File lib/thor/runner.rb, line 100
  def update(name)
    yaml = thor_yaml
    raise Error, "Can't find module `#{name}'" if !yaml[name] || !yaml[name][:location]

    puts "Updating `#{name}' from #{yaml[name][:location]}"
    old_filename = yaml[name][:filename]
    self.options = self.options.merge("as" => name)
    filename = install(yaml[name][:location])
    unless filename == old_filename
      File.delete(File.join(thor_root, old_filename))
    end
  end