trait RetrieveConfigFilesTrait

trait RetrieveConfigFilesTrait {
    
    /**
     * Callback to filter Drupal configuration files.
     *
     * @param mixed $current
     *   The element being filtered.
     * @param string $key
     *   The element key.
     * @param mixed $iterator
     *   The iterator.
     *
     * @return bool
     *   Whether the current file is a Drupal configuration file.
     */
    protected static function configFilesCallback(mixed $current, string $key, mixed $iterator) : bool {
        // A Drupal configuration file is either contained in a config/install or a
        // config/optional directory. The config/schema directory contains the
        // schemas for the configuration files.
        
        /** @var \SplFileInfo $current */
        
        /** @var \RecursiveDirectoryIterator $iterator */
        $path = $current->getPath();
        return str_ends_with($path, '/config/install') || str_ends_with($path, '/config/optional');
    }

}