ENGCOM-7781: improve NonComposerComponentRegistration #28975

 - Merge Pull Request #28975 from rvitaliy/magento2:feature/improve-NonComposerComponentRegistration.php
 - Merged commits:
   1. 8e45616

Author: magento-engcom-team

app/etc/NonComposerComponentRegistration.php

@@ -3,6 +3,7 @@
  * Copyright © Magento, Inc. All rights reserved.
  * See COPYING.txt for license details.
  */
+declare(strict_types=1);
 
 //Register components (via a list of glob patterns)
 namespace Magento\NonComposerComponentRegistration;
@@ -11,23 +12,23 @@
 
 /**
  * Include files from a list of glob patterns
- *
- * @throws RuntimeException
- * @return void
  */
-$main = function ()
-{
+(static function (): void {
     $globPatterns = require __DIR__ . '/registration_globlist.php';
-    $baseDir = dirname(dirname(__DIR__)) . '/';
+    $baseDir = \dirname(__DIR__, 2) . '/';
 
     foreach ($globPatterns as $globPattern) {
         // Sorting is disabled intentionally for performance improvement
-        $files = glob($baseDir . $globPattern, GLOB_NOSORT);
+        $files = \glob($baseDir . $globPattern, GLOB_NOSORT);
         if ($files === false) {
             throw new RuntimeException("glob(): error with '$baseDir$globPattern'");
         }
-        array_map(function ($file) { require_once $file; }, $files);
-    }
-};
 
-$main();
+        \array_map(
+            static function (string $file): void {
+                require_once $file;
+            },
+            $files
+        );
+    }
+})();