N98\Magento\Command\Installer\InstallCommand::downloadMagento PHP Метод

    public function downloadMagento(InputInterface $input, OutputInterface $output)
    {
        try {
            $package = $this->createComposerPackageByConfig($this->config['magentoVersionData']);
            $this->config['magentoPackage'] = $package;
            if (file_exists($this->config['installationFolder'] . '/app/Mage.php')) {
                $output->writeln('<error>A magento installation already exists in this folder </error>');
                return false;
            }
            $composer = $this->getComposer($input, $output);
            $targetFolder = $this->getTargetFolderByType($composer, $package, $this->config['installationFolder']);
            $this->config['magentoPackage'] = $this->downloadByComposerConfig($input, $output, $package, $targetFolder, true);
            if ($this->isSourceTypeRepository($package->getSourceType())) {
                $filesystem = new \N98\Util\Filesystem();
                $filesystem->recursiveCopy($targetFolder, $this->config['installationFolder'], array('.git', '.hg'));
            } else {
                $filesystem = new \Composer\Util\Filesystem();
                $filesystem->copyThenRemove($this->config['installationFolder'] . '/_n98_magerun_download', $this->config['installationFolder']);
            }
            if (version_compare(PHP_VERSION, '5.4.0') >= 0) {
                // Patch installer
                $this->patchMagentoInstallerForPHP54($this->config['installationFolder']);
            }
        } catch (Exception $e) {
            $output->writeln('<error>' . $e->getMessage() . '</error>');
            return false;
        }
        return true;
    }