ForkCMS\Bundle\InstallerBundle\Controller\InstallerController::checkInstall PHP Метод

    protected function checkInstall()
    {
        $filesystem = new Filesystem();
        $kernelDir = $this->container->getParameter('kernel.root_dir');
        $parameterFile = $kernelDir . 'config/parameters.yml';
        if ($filesystem->exists($parameterFile)) {
            throw new ExitException('This Fork has already been installed. To reinstall, delete
                 parameters.yml from the ' . $kernelDir . 'config/ directory.', 'This Fork has already been installed. To reinstall, delete
                 parameters.yml from the ' . $kernelDir . 'config/ directory. To log in,
                 <a href="/private">click here</a>.', Response::HTTP_FORBIDDEN);
        }
    }