Chmod 0777 race condition during staging operations

This could be achieved by simply omitting the callback passed to the deleteRecursive function, as the Drupal core function already performs this internally.

Are you sure?

I see this in \Drupal\Core\File\FileSystem::unlink() and \Drupal\Core\File\FileSystem::rmdir():

    if (!$this->streamWrapperManager->isValidUri($uri) && str_starts_with(PHP_OS, 'WIN')) {
      chmod($uri, 0700);
    }

Soooo...it's only chmodding if we're on Windows?

It...it doesn't. It only does that if the operating system is Windows.

I pointed that out in #4.

Looks good #4 is correct the explanation of why this is only done on Windows in the comment for \Drupal\Core\File\FileSystemInterface::rmdir

Automatically closed - issue fixed for 2 weeks with no activity.