N98\Magento\Application::detectMagento PHP Method

    public function detectMagento(InputInterface $input = null, OutputInterface $output = null)
    {
        // do not detect magento twice
        if ($this->_magentoDetected) {
            return;
        }
        if (null === $input) {
            $input = new ArgvInput();
        }
        if (null === $output) {
            $output = new ConsoleOutput();
        }
        if ($this->getMagentoRootFolder() === null) {
            $this->_checkRootDirOption($input);
            $folder = OperatingSystem::getCwd();
        } else {
            $folder = $this->getMagentoRootFolder();
        }
        $this->getHelperSet()->set(new MagentoHelper($input, $output), 'magento');
        $magentoHelper = $this->getHelperSet()->get('magento');
        /* @var $magentoHelper MagentoHelper */
        if (!$this->_directRootDir) {
            $subFolders = $this->config->getDetectSubFolders();
        } else {
            $subFolders = array();
        }
        $this->_magentoDetected = $magentoHelper->detect($folder, $subFolders);
        $this->_magentoRootFolder = $magentoHelper->getRootFolder();
        $this->_magentoEnterprise = $magentoHelper->isEnterpriseEdition();
        $this->_magentoMajorVersion = $magentoHelper->getMajorVersion();
        $this->_magerunStopFileFound = $magentoHelper->isMagerunStopFileFound();
        $this->_magerunStopFileFolder = $magentoHelper->getMagerunStopFileFolder();
    }