Kirby\Cli\Command\Version::execute PHP Method

    protected function execute(InputInterface $input, OutputInterface $output)
    {
        if (!$this->isInstalled()) {
            throw new RuntimeException('Invalid Kirby installation');
        }
        // bootstrap the core
        $this->bootstrap();
        $output->writeln("<info>Core:\t\t" . kirby::version() . "</info>");
        $output->writeln("<info>Toolkit:\t" . toolkit::version() . "</info>");
        // also check for the panel version, if it is installed
        if (is_dir($this->dir() . '/panel')) {
            if (!is_file($this->dir() . '/panel/app/bootstrap.php')) {
                throw new RuntimeException('The panel does not seem to be correctly installed');
            }
            // bootstrap the panel
            require $this->dir() . '/panel/app/bootstrap.php';
            $output->writeln("<info>Panel:\t\t" . panel::version() . "</info>");
        }
    }