Issue #3252126: Detect DB updates and do not apply a update via cron if there is a DB update

package_manager/src/EventSubscriber/ComposerSettingsValidator.php

+<?php
+
+namespace Drupal\package_manager\EventSubscriber;
+
+use Drupal\Core\StringTranslation\StringTranslationTrait;
+use Drupal\Core\StringTranslation\TranslationInterface;
+use Drupal\package_manager\Event\PreCreateEvent;
+use Drupal\package_manager\Event\PreOperationStageEvent;
+
+/**
+ * Validates certain Composer settings.
+ */
+class ComposerSettingsValidator implements PreOperationStageValidatorInterface {
+
+  use StringTranslationTrait;
+
+  /**
+   * Constructs a ComposerSettingsValidator object.
+   *
+   * @param \Drupal\Core\StringTranslation\TranslationInterface $translation
+   *   The string translation service.
+   */
+  public function __construct(TranslationInterface $translation) {
+    $this->setStringTranslation($translation);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateStagePreOperation(PreOperationStageEvent $event): void {
+    $config = $event->getStage()
+      ->getActiveComposer()
+      ->getComposer()
+      ->getConfig();
+
+    if ($config->get('secure-http') !== TRUE) {
+      $event->addError([
+        $this->t('HTTPS must be enabled for Composer downloads. See <a href=":url">the Composer documentation</a> for more information.', [
+          ':url' => 'https://getcomposer.org/doc/06-config.md#secure-http',
+        ]),
+      ]);
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function getSubscribedEvents() {
+    return [
+      PreCreateEvent::class => 'validateStagePreOperation',
+    ];
+  }
+
+}