[Translation] Allow recursive extraction of translation keys

Author: Jean-Beru

src/Symfony/Component/Translation/Extractor/AbstractFileExtractor.php

@@ -23,19 +23,16 @@ abstract class AbstractFileExtractor
     protected function extractFiles(string|iterable $resource): iterable
     {
         if (is_iterable($resource)) {
-            $files = [];
             foreach ($resource as $file) {
-                if ($this->canBeExtracted($file)) {
-                    $files[] = $this->toSplFileInfo($file);
-                }
+                yield from $this->extractFiles($file);
             }
         } elseif (is_file($resource)) {
-            $files = $this->canBeExtracted($resource) ? [$this->toSplFileInfo($resource)] : [];
+            if ($this->canBeExtracted($resource)) {
+                yield $this->toSplFileInfo($resource);
+            }
         } else {
-            $files = $this->extractFromDirectory($resource);
+            yield from $this->extractFromDirectory($resource);
         }
-
-        return $files;
     }
 
     private function toSplFileInfo(string $file): \SplFileInfo

src/Symfony/Component/Translation/Tests/Extractor/PhpAstExtractorTest.php

@@ -54,5 +54,6 @@ public static function resourcesProvider(): \Generator
         yield 'splFiles' => [$splFiles];
         yield 'ArrayObject_glob' => [new \ArrayObject(glob(self::FIXTURES_FOLDER.'*'))];
         yield 'ArrayObject_splFiles' => [new \ArrayObject($splFiles)];
+        yield 'ArrayObject_directory' => [new \ArrayObject([self::FIXTURES_FOLDER])];
     }
 }