bug symfony#38142 [FrameworkBundle] adopt src/.preload.php (nicolas-grekas)

This PR was merged into the 4.4 branch.

Discussion
----------

[FrameworkBundle] adopt src/.preload.php

| Q             | A
| ------------- | ---
| Branch?       | 4.4
| Bug fix?      | yes
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix symfony#38123
| License       | MIT
| Doc PR        | -

The leading dot prevents PSR-4 discovery from considering the file.

Commits
-------

f4c47eb [FrameworkBundle] adopt src/.preload.php

Author: fabpot

src/Symfony/Bundle/FrameworkBundle/Command/CacheClearCommand.php

@@ -174,7 +174,7 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         $preloadFile = $fs->makePathRelative(\dirname($containerFile, 2), $kernelDir);
         $preloadFile .= substr_replace(basename($containerFile), '.preload', -4, 0);
         $preloadFile = var_export('/'.$preloadFile, true);
-        @file_put_contents($kernelDir.'/preload.php', <<<EOPHP
+        @file_put_contents($kernelDir.'/.preload.php', <<<EOPHP
 <?php
 
 if (file_exists(__DIR__.$preloadFile)) {