InfoParser.php

<?php

namespace Drupal\Core\Extension;

use Drupal\Component\FileCache\FileCache;
use Drupal\Component\FileCache\FileCacheFactory;
use Drupal\Component\FileCache\FileCacheInterface;

/**
 * Parses extension .info.yml files.
 */
class InfoParser extends InfoParserDynamic {
    
    /**
     * The file cache.
     *
     * @var \Drupal\Component\FileCache\FileCacheInterface
     */
    protected FileCacheInterface $fileCache;
    
    /**
     * InfoParser constructor.
     *
     * @param string $app_root
     *   The root directory of the Drupal installation.
     */
    public function __construct(string $app_root) {
        parent::__construct($app_root);
        if (FileCacheFactory::getPrefix() !== NULL) {
            $this->fileCache = FileCacheFactory::get('info_parser');
        }
        else {
            // Just use a static file cache when there is no prefix. This code path is
            // triggered when info is parsed prior to \Drupal\Core\DrupalKernel::boot()
            // running. This occurs during the very early installer and in some test
            // scenarios.
            $this->fileCache = new FileCache('info_parser', 'info_parser');
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function parse($filename) {
        $data = $this->fileCache
            ->get($filename);
        if ($data === NULL) {
            $data = parent::parse($filename);
            $this->fileCache
                ->set($filename, $data);
        }
        return $data;
    }

}