Issue #3412035: Fix fatal error in project update status

Closes #3412035

composer_deploy.module

@@ -83,10 +83,17 @@ function composer_deploy_preprocess_update_project_status(&$variables) {
   if (!in_array($project_type, ['module', 'theme'])) {
     return;
   }
-  $projectData = \Drupal::service('extension.list.' . $project_type)->getExtensionInfo($variables['project']['name']);
 
-  foreach ($variables['versions'] as &$version) {
+  // All extensions (modules, themes, etc.) in a project have the same metadata
+  // because they share the same source repository. The metadata is provided by
+  // composer_deploy_system_info_alter().
+  // Therefore, the first extension from the project is used to get the git-metadata
+  // for the whole project.
+  $projects = \Drupal::service('update.manager')->getProjects();
+  $extensionName = array_key_first($projects[$variables['project']['name']]['includes']);
+  $projectData = \Drupal::service('extension.list.' . $project_type)->getExtensionInfo($extensionName);
 
+  foreach ($variables['versions'] as &$version) {
     $currentVersion = $variables['project']['existing_version'];
     // Replace our current version with the specific hash when on -dev release.
     if (substr($variables['project']['existing_version'], -3) == 'dev') {