Expose meta on ResourceCheckerConfigCache / ConfigCacheInterface

When a developer adds meta to a config cache, it should also be possible to get back the meta.

I use these config caches for my own framework and want to retrieve a specific meta associated to
the cache.

src/Symfony/Component/Config/CHANGELOG.md

@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+7.1
+---
+
+ * Added method `getMeta()` to ResourceCheckerConfigCache and ConfigCacheInterface
+
 7.0
 ---
 

src/Symfony/Component/Config/ConfigCacheInterface.php

@@ -42,4 +42,11 @@ public function isFresh(): bool;
      * @throws \RuntimeException When the cache file cannot be written
      */
     public function write(string $content, array $metadata = null): void;
+
+    /*
+     * Returns the metadata stored for this cache.
+     *
+     * @return false|ResourceInterface[]
+     */
+    // public function getMeta() : false | array;
 }

src/Symfony/Component/Config/ResourceCheckerConfigCache.php

@@ -68,13 +68,7 @@ public function isFresh(): bool
             return true; // shortcut - if we don't have any checkers we don't need to bother with the meta file at all
         }
 
-        $metadata = $this->getMetaFile();
-
-        if (!is_file($metadata)) {
-            return false;
-        }
-
-        $meta = $this->safelyUnserialize($metadata);
+        $meta = $this->getMeta();
 
         if (false === $meta) {
             return false;
@@ -133,6 +127,22 @@ public function write(string $content, array $metadata = null): void
         }
     }
 
+    /**
+     * Returns the metadata stored for this cache.
+     *
+     * @return false|ResourceInterface[]
+     */
+    public function getMeta(): false|array
+    {
+        $metadata = $this->getMetaFile();
+
+        if (!is_file($metadata)) {
+            return false;
+        }
+
+        return $this->safelyUnserialize($metadata);
+    }
+
     /**
      * Gets the meta file path.
      */

src/Symfony/Component/Config/Tests/ResourceCheckerConfigCacheTest.php

@@ -148,4 +148,14 @@ public function testCacheIsNotFreshIfNotExistsMetaFile()
 
         $this->assertFalse($cache->isFresh());
     }
+
+    public function testGetMeta()
+    {
+        $checker = $this->createMock(ResourceCheckerInterface::class);
+        $cache = new ResourceCheckerConfigCache($this->cacheFile, [$checker]);
+        $cache->write('foo', [new FileResource(__FILE__)]);
+
+        $this->assertCount(1, $cache->getMeta());
+        $this->assertEquals(new FileResource(__FILE__), $cache->getMeta()[0]);
+    }
 }