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vendor/symfony/config/ConfigCache.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Config;
+
+use Symfony\Component\Config\Resource\ResourceInterface;
+use Symfony\Component\Config\Resource\SelfCheckingResourceChecker;
+use Symfony\Component\Config\Resource\SkippingResourceChecker;
+
+/**
+ * ConfigCache caches arbitrary content in files on disk.
+ *
+ * When in debug mode, those metadata resources that implement
+ * \Symfony\Component\Config\Resource\SelfCheckingResourceInterface will
+ * be used to check cache freshness.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Matthias Pigulla <mp@webfactory.de>
+ */
+class ConfigCache extends ResourceCheckerConfigCache
+{
+    /**
+     * @param string                                 $file                 The absolute cache path
+     * @param bool                                   $debug                Whether debugging is enabled or not
+     * @param string|null                            $metaFile             The absolute path to the meta file
+     * @param class-string<ResourceInterface>[]|null $skippedResourceTypes
+     */
+    public function __construct(
+        string $file,
+        private bool $debug,
+        ?string $metaFile = null,
+        ?array $skippedResourceTypes = null,
+    ) {
+        $checkers = [];
+        if ($this->debug) {
+            if (null !== $skippedResourceTypes) {
+                $checkers[] = new SkippingResourceChecker($skippedResourceTypes);
+            }
+            $checkers[] = new SelfCheckingResourceChecker();
+        }
+
+        parent::__construct($file, $checkers, $metaFile);
+    }
+
+    /**
+     * Checks if the cache is still fresh.
+     *
+     * This implementation always returns true when debug is off and the
+     * cache file exists.
+     */
+    public function isFresh(): bool
+    {
+        if (!$this->debug && is_file($this->getPath())) {
+            return true;
+        }
+
+        return parent::isFresh();
+    }
+}