/**
  * Get the plugins and mu-plugins from the mu-plugin path and remove duplicates.
  * Check cache against current plugins for newly activated plugins.
  * After that, we can update the cache.
  */
 private function updateCache()
 {
     require_once ABSPATH . 'wp-admin/includes/plugin.php';
     self::$auto_plugins = get_plugins(self::$relative_path);
     self::$mu_plugins = get_mu_plugins(self::$relative_path);
     $plugins = array_diff_key(self::$auto_plugins, self::$mu_plugins);
     $rebuild = !is_array(self::$cache['plugins']);
     self::$activated = $rebuild ? $plugins : array_diff_key($plugins, self::$cache['plugins']);
     self::$cache = array('plugins' => $plugins, 'count' => $this->countPlugins());
     update_site_option('bedrock_autoloader', self::$cache);
 }