makeWorldReadable example

      $this->prepareInstallDirectory($filetransfer, $args['install_dir']);

      if (is_dir($args['install_dir'] . '/' . $this->name)) {
        // Remove the existing installed file.         $filetransfer->removeDirectory($args['install_dir'] . '/' . $this->name);
      }

      // Copy the directory in place.       $filetransfer->copyDirectory($this->source, $args['install_dir']);

      // Make sure what we just installed is readable by the web server.       $this->makeWorldReadable($filetransfer, $args['install_dir'] . '/' . $this->name);

      // Run the updates.       // @todo Decide if we want to implement this.       $this->postUpdate();

      // For now, just return a list of links of things to do.       return $this->postUpdateTasks();
    }
    catch (FileTransferException $e) {
      throw new UpdaterFileTransferException("File Transfer failed, reason: '" . strtr($e->getMessage(), $e->arguments) . "'");
    }
  }