Issue #3230507: Create build tests for case where site is using core recommended Composer project

src/Updater.php

@@ -9,6 +9,7 @@ use Drupal\automatic_updates\Event\UpdateEvent;
 use Drupal\automatic_updates\Exception\UpdateException;
 use Drupal\Component\FileSystem\FileSystem;
 use Drupal\Component\Serialization\Json;
+use Drupal\Core\Config\ConfigFactoryInterface;
 use Drupal\Core\State\StateInterface;
 use Drupal\Core\StringTranslation\StringTranslationTrait;
 use Drupal\Core\StringTranslation\TranslationInterface;
@@ -75,6 +76,13 @@ class Updater {
    */
   protected $eventDispatcher;
 
+  /**
+   * The config factory service.
+   *
+   * @var \Drupal\Core\Config\ConfigFactoryInterface
+   */
+  protected $configFactory;
+
   /**
    * Constructs an Updater object.
    *
@@ -92,8 +100,10 @@ class Updater {
    *   The Composer Stager's committer service.
    * @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $event_dispatcher
    *   The event dispatcher service.
+   * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+   *   The config factory service.
    */
-  public function __construct(StateInterface $state, TranslationInterface $translation, BeginnerInterface $beginner, StagerInterface $stager, CleanerInterface $cleaner, CommitterInterface $committer, EventDispatcherInterface $event_dispatcher) {
+  public function __construct(StateInterface $state, TranslationInterface $translation, BeginnerInterface $beginner, StagerInterface $stager, CleanerInterface $cleaner, CommitterInterface $committer, EventDispatcherInterface $event_dispatcher, ConfigFactoryInterface $config_factory) {
     $this->state = $state;
     $this->beginner = $beginner;
     $this->stager = $stager;
@@ -101,6 +111,7 @@ class Updater {
     $this->committer = $committer;
     $this->setStringTranslation($translation);
     $this->eventDispatcher = $event_dispatcher;
+    $this->configFactory = $config_factory;
   }
 
   /**
@@ -121,10 +132,10 @@ class Updater {
    *   The absolute path for stage directory.
    */
   public function getStageDirectory(): string {
-    // @todo This should be unique, in order to support parallel runs, or
-    // multiple sites on the same server. Find a way to make it unique, and
-    // persistent for the entire lifetime of the update process.
-    return FileSystem::getOsTemporaryDirectory() . '/.automatic_updates_stage';
+    // Append the site ID to the directory in order to support parallel test
+    // runs, or multiple sites hosted on the same server.
+    $site_id = $this->configFactory->get('system.site')->get('uuid');
+    return FileSystem::getOsTemporaryDirectory() . '/.automatic_updates_stage_' . $site_id;
   }
 
   /**