Gush\Application::doRunCommand PHP Method

    protected function doRunCommand(Command $command, InputInterface $input, OutputInterface $output)
    {
        $helperSet = $command->getHelperSet();
        foreach ($helperSet as $helper) {
            if ($helper instanceof OutputAwareInterface) {
                $helper->setOutput($output);
            }
            if ($helper instanceof InputAwareInterface) {
                $helper->setInput($input);
            }
        }
        $event = new ConsoleCommandEvent($command, $input, $output);
        $this->dispatcher->dispatch(ConsoleEvents::COMMAND, $event);
        try {
            $exitCode = $command->run($input, $output);
        } catch (\Exception $e) {
            $event = new ConsoleTerminateEvent($command, $input, $output, $e->getCode());
            $this->dispatcher->dispatch(ConsoleEvents::TERMINATE, $event);
            $event = new ConsoleExceptionEvent($command, $input, $output, $e, $event->getExitCode());
            $this->dispatcher->dispatch(ConsoleEvents::EXCEPTION, $event);
            if ($e instanceof UserException) {
                $this->getHelperSet()->get('gush_style')->error($e->getMessages());
                if (OutputInterface::VERBOSITY_VERBOSE <= $output->getVerbosity()) {
                    throw $e;
                }
                return $event->getExitCode();
            } else {
                throw $event->getException();
            }
        }
        $event = new ConsoleTerminateEvent($command, $input, $output, $exitCode);
        $this->dispatcher->dispatch(ConsoleEvents::TERMINATE, $event);
        return $event->getExitCode();
    }