LocalStream::getLocalPath

protected LocalStream::getLocalPath($uri = NULL)

protected function getLocalPath($uri = NULL) {
  if (!isset($uri)) {
    $uri = $this->uri;
  }
  $path = $this->getDirectoryPath() . '/' . $this->getTarget($uri);

  // In PHPUnit tests, the base path for local streams may be a virtual
  // filesystem stream wrapper URI, in which case this local stream acts like
  // a proxy. realpath() is not supported by vfsStream, because a virtual
  // file system does not have a real filepath.
  if (strpos($path, 'vfs://') === 0) {
    return $path;
  }

  $realpath = realpath($path);
  if (!$realpath) {
    // This file does not yet exist.
    $realpath = realpath(dirname($path)) . '/' . drupal_basename($path);
  }
  $directory = realpath($this->getDirectoryPath());
  if (!$realpath || !$directory || strpos($realpath, $directory) !== 0) {
    return FALSE;
  }
  return $realpath;
}