Ability to execute code synchronously

[onmotion]

A case:

I make an ajax request and wait the real exit code for show the result to the user. In background mode I don't have access to the real exit code.

public function actionRunManualSync() {
        $exitCode = null;
        \Yii::$app->consoleRunner->run('beru/sync', $exitCode);
        return $exitCode;
    }