Platformsh\Cli\Local\LocalApplication::getRoot PHP Method

    public function getRoot()
    {
        return $this->appRoot;
    }

 /**
  * @param LocalApplication $app
  * @param string           $sourceDir
  * @param string           $destination
  *
  * @return bool
  */
 protected function buildApp($app, $sourceDir, $destination)
 {
     $verbose = $this->output->isVerbose();
     $appRoot = $app->getRoot();
     $appConfig = $app->getConfig();
     $multiApp = $appRoot != $sourceDir;
     $appName = $app->getName();
     $appId = $app->getId();
     $buildName = date('Y-m-d--H-i-s');
     if (!empty($this->settings['environmentId'])) {
         $buildName .= '--' . $this->settings['environmentId'];
     }
     if ($multiApp) {
         $buildName .= '--' . str_replace('/', '-', $appId);
     }
     if (!empty($this->settings['projectRoot'])) {
         $buildDir = $this->settings['projectRoot'] . '/' . LocalProject::BUILD_DIR . '/' . $buildName;
     } else {
         $buildDir = $sourceDir . '/' . LocalProject::BUILD_DIR . '/' . $buildName;
     }
     // Get the configured document root.
     $documentRoot = $this->getDocumentRoot($appConfig);
     $toolstack = $app->getToolstack();
     if (!$toolstack) {
         $this->output->writeln("Toolstack not found for application <error>{$appId}</error>");
         return false;
     }
     // Warn about a mismatched PHP version.
     if (isset($appConfig['type']) && strpos($appConfig['type'], ':')) {
         list($stack, $version) = explode(':', $appConfig['type'], 2);
         if ($stack === 'php' && version_compare($version, PHP_VERSION, '>')) {
             $this->output->writeln(sprintf('<comment>Warning:</comment> the application <comment>%s</comment> expects PHP %s, but the system version is %s.', $appId, $version, PHP_VERSION));
         }
     }
     $toolstack->setOutput($this->output);
     $buildSettings = $this->settings + ['multiApp' => $multiApp, 'appName' => $appName];
     $toolstack->prepare($buildDir, $documentRoot, $appRoot, $buildSettings);
     $archive = false;
     if (empty($this->settings['noArchive']) && empty($this->settings['noCache']) && !empty($this->settings['projectRoot'])) {
         $treeId = $this->getTreeId($appRoot);
         if ($treeId) {
             if ($verbose) {
                 $this->output->writeln("Tree ID: {$treeId}");
             }
             $archive = $this->settings['projectRoot'] . '/' . LocalProject::ARCHIVE_DIR . '/' . $treeId . '.tar.gz';
         }
     }
     if ($archive && file_exists($archive)) {
         $message = "Extracting archive for application <info>{$appId}</info>";
         $this->output->writeln($message);
         $this->fsHelper->extractArchive($archive, $buildDir);
     } else {
         $message = "Building application <info>{$appId}</info>";
         if (isset($appConfig['type'])) {
             $message .= ' (runtime type: ' . $appConfig['type'] . ')';
         }
         $this->output->writeln($message);
         $toolstack->build();
         if ($this->runPostBuildHooks($appConfig, $toolstack->getAppRoot()) === false) {
             // The user may not care if build hooks fail, but we should
             // not archive the result.
             $archive = false;
         }
         if ($archive && $toolstack->canArchive()) {
             $this->output->writeln("Saving build archive");
             if (!is_dir(dirname($archive))) {
                 mkdir(dirname($archive));
             }
             $this->fsHelper->archiveDir($buildDir, $archive);
         }
     }
     $toolstack->install();
     $webRoot = $toolstack->getWebRoot();
     // Symlink the built web root ($webRoot) into www or www/appId.
     if (!is_dir($webRoot)) {
         $this->output->writeln("Web root not found: <error>{$webRoot}</error>");
         return false;
     }
     if ($multiApp) {
         $appDir = str_replace('/', '-', $appId);
         if (is_link($destination)) {
             $this->fsHelper->remove($destination);
         }
         $destination .= "/{$appDir}";
     }
     $this->fsHelper->symlink($webRoot, $destination);
     $this->output->writeln("Web root: {$destination}");
     $message = "Build complete for application <info>{$appId}</info>";
     $this->output->writeln($message);
     return true;
 }