t('Package Manager is not supported by your environment.'); $help_url = getenv(static::VARIABLE_NAME); if (empty($help_url)) { return; } // If the URL is not parseable, catch the exception that Url::fromUri() // would generate. try { $message = $this->t('@message', [ ':url' => Url::fromUri($help_url)->toString(), '@message' => $message, ]); } catch (\InvalidArgumentException) { // No need to do anything here. The message just won't be a link. } $event->addError([$message]); // If Package Manager is unsupported, there's no point in doing any more // validation. $event->stopPropagation(); } /** * {@inheritdoc} */ public static function getSubscribedEvents(): array { // Set priority to run before BaseRequirementsFulfilledValidator, and even // before other base requirement validators. // @see \Drupal\package_manager\Validator\BaseRequirementsFulfilledValidator return array_map(fn () => ['validate', BaseRequirementsFulfilledValidator::PRIORITY + 1000], static::getSubscribedEventsFromTrait()); } }