From 2552b97c4a9e060ff6d67973aba45df205e01868 Mon Sep 17 00:00:00 2001
From: Julien Veyssier <julien-nc@posteo.net>
Date: Tue, 14 Apr 2026 11:30:34 +0200
Subject: [PATCH] fix(upgrade): restore missing apps on upgrade

Signed-off-by: Julien Veyssier <julien-nc@posteo.net>
---
 lib/private/Updater.php   | 14 ++++++++++++++
 tests/lib/UpdaterTest.php | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/lib/private/Updater.php b/lib/private/Updater.php
index da7b52e549306..64263bb895aab 100644
--- a/lib/private/Updater.php
+++ b/lib/private/Updater.php
@@ -23,6 +23,7 @@
 use OC\Repair\Events\RepairStartEvent;
 use OC\Repair\Events\RepairStepEvent;
 use OC\Repair\Events\RepairWarningEvent;
+use OCP\App\AppPathNotFoundException;
 use OCP\App\IAppManager;
 use OCP\EventDispatcher\Event;
 use OCP\EventDispatcher\IEventDispatcher;
@@ -390,6 +391,8 @@ private function upgradeAppStoreApps(array $apps, array $previousEnableStates =
 				$this->emit('\OC\Updater', 'checkAppStoreApp', [$app]);
 
 				if (isset($previousEnableStates[$app])) {
+					$this->restoreMissingAppStoreApp($app);
+
 					if (!empty($previousEnableStates[$app]) && is_array($previousEnableStates[$app])) {
 						$this->appManager->enableAppForGroups($app, $previousEnableStates[$app]);
 					} elseif ($previousEnableStates[$app] === 'yes') {
@@ -404,6 +407,17 @@ private function upgradeAppStoreApps(array $apps, array $previousEnableStates =
 		}
 	}
 
+	private function restoreMissingAppStoreApp(string $appId): void {
+		try {
+			$this->appManager->getAppPath($appId, true);
+		} catch (AppPathNotFoundException) {
+			// the app was not found locally but we know it was previously enabled
+			// so we automatically download it from the appstore and run its missing migrations
+			$this->installer->downloadApp($appId);
+			$this->installer->installApp($appId);
+		}
+	}
+
 	private function logAllEvents(): void {
 		$log = $this->log;
 
diff --git a/tests/lib/UpdaterTest.php b/tests/lib/UpdaterTest.php
index 23a4d5329c87c..c7717327ca97d 100644
--- a/tests/lib/UpdaterTest.php
+++ b/tests/lib/UpdaterTest.php
@@ -11,6 +11,7 @@
 use OC\Installer;
 use OC\IntegrityCheck\Checker;
 use OC\Updater;
+use OCP\App\AppPathNotFoundException;
 use OCP\App\IAppManager;
 use OCP\IAppConfig;
 use OCP\IConfig;
@@ -107,4 +108,36 @@ public function testIsUpgradePossible($oldVersion, $newVersion, $allowedVersions
 
 		$this->assertSame($result, $this->updater->isUpgradePossible($oldVersion, $newVersion, $allowedVersions));
 	}
+
+	public function testUpgradeAppStoreAppsRestoresMissingAutoDisabledAppBeforeEnabling(): void {
+		$this->installer->expects($this->once())
+			->method('isUpdateAvailable')
+			->with('mailroundcube')
+			->willReturn(false);
+
+		$this->installer->expects($this->once())
+			->method('downloadApp')
+			->with('mailroundcube');
+
+		$this->installer->expects($this->once())
+			->method('installApp')
+			->with('mailroundcube');
+
+		$this->appManager->expects($this->once())
+			->method('getAppPath')
+			->with('mailroundcube', true)
+			->willThrowException(new AppPathNotFoundException('missing'));
+
+		$this->appManager->expects($this->once())
+			->method('enableApp')
+			->with('mailroundcube');
+
+		$this->appManager->expects($this->never())
+			->method('enableAppForGroups');
+
+		self::invokePrivate($this->updater, 'upgradeAppStoreApps', [
+			['mailroundcube'],
+			['mailroundcube' => 'yes'],
+		]);
+	}
 }