Issue #3302828 by Gábor Hojtsy: Upgrade Status tests fail on PHP 7.4 and PHP 8.0

        throw new \Exception('Vendor source files were not found. You may need to configure a vendor-dir in composer.json. See https://getcomposer.org/doc/06-config.md#vendor-dir. Missing ' . $extension_neon . ' and ' . $rules_neon . '.');

      }

      $config .= "\nincludes:\n\t- '" . $extension_neon . "'\n\t- '" . $rules_neon . "'\n";

      // phpstan-drupal 1.1.16 introduced a new rules.neon file, include it if

      // it exists. phpstan-drupal 1.1.4 and earlier are the only versions that

      // still support PHP 7.3 and earlier, and this file does not exist there.

      $drupal_rules_neon = $this->vendorPath . '/mglaman/phpstan-drupal/rules.neon';

      if (file_exists($drupal_rules_neon)) {

        $config .= "\t- '" . $drupal_rules_neon . "'\n";

      }

    }

    $success = file_put_contents($this->phpstanNeonPath, $config);