Update: state which step we are going to start and warn if it might be slow

core/ajax/update.php

@@ -68,12 +68,24 @@ if (OC::checkUpgrade(false)) {
 	$updater->listen('\OC\Updater', 'maintenanceActive', function () use ($eventSource, $l) {
 		$eventSource->send('success', (string)$l->t('Maintenance mode is kept active'));
 	});
+	$updater->listen('\OC\Updater', 'dbUpgradeBefore', function () use($eventSource, $l) {
+		$eventSource->send('success', (string)$l->t('Updating database schema'));
+	});
 	$updater->listen('\OC\Updater', 'dbUpgrade', function () use ($eventSource, $l) {
 		$eventSource->send('success', (string)$l->t('Updated database'));
 	});
+	$updater->listen('\OC\Updater', 'dbSimulateUpgradeBefore', function () use($eventSource, $l) {
+		$eventSource->send('success', (string)$l->t('Checking whether the database schema can be updated (this can take a long time depending on the database size)'));
+	});
 	$updater->listen('\OC\Updater', 'dbSimulateUpgrade', function () use ($eventSource, $l) {
 		$eventSource->send('success', (string)$l->t('Checked database schema update'));
 	});
+	$updater->listen('\OC\Updater', 'appUpgradeCheckBefore', function () use ($eventSource, $l) {
+		$eventSource->send('success', (string)$l->t('Checking updates of apps'));
+	});
+	$updater->listen('\OC\Updater', 'appSimulateUpdate', function ($app) use ($eventSource, $l) {
+		$eventSource->send('success', (string)$l->t('Checking whether the database schema for %s can be updated (this can take a long time depending on the database size)', [$app]));
+	});
 	$updater->listen('\OC\Updater', 'appUpgradeCheck', function () use ($eventSource, $l) {
 		$eventSource->send('success', (string)$l->t('Checked database schema update for apps'));
 	});

core/command/upgrade.php

@@ -155,9 +155,15 @@ class Upgrade extends Command {
 					}
 					$output->writeln($message);
 				});
+			$updater->listen('\OC\Updater', 'dbUpgradeBefore', function () use($output) {
+				$output->writeln('<info>Updating database schema</info>');
+			});
 			$updater->listen('\OC\Updater', 'dbUpgrade', function () use($output) {
 				$output->writeln('<info>Updated database</info>');
 			});
+			$updater->listen('\OC\Updater', 'dbSimulateUpgradeBefore', function () use($output) {
+				$output->writeln('<info>Checking whether the database schema can be updated (this can take a long time depending on the database size)</info>');
+			});
 			$updater->listen('\OC\Updater', 'dbSimulateUpgrade', function () use($output) {
 				$output->writeln('<info>Checked database schema update</info>');
 			});
@@ -176,6 +182,12 @@ class Upgrade extends Command {
 			$updater->listen('\OC\Updater', 'repairError', function ($app) use($output) {
 				$output->writeln('<error>Repair error: ' . $app . '</error>');
 			});
+			$updater->listen('\OC\Updater', 'appUpgradeCheckBefore', function () use ($output) {
+				$output->writeln('<info>Checking updates of apps</info>');
+			});
+			$updater->listen('\OC\Updater', 'appSimulateUpdate', function ($app) use ($output) {
+				$output->writeln("<info>Checking whether the database schema for <$app> can be updated (this can take a long time depending on the database size)</info>");
+			});
 			$updater->listen('\OC\Updater', 'appUpgradeCheck', function () use ($output) {
 				$output->writeln('<info>Checked database schema update for apps</info>');
 			});

lib/private/updater.php

@@ -337,6 +337,8 @@ class Updater extends BasicEmitter {
 	}
 
 	protected function checkCoreUpgrade() {
+		$this->emit('\OC\Updater', 'dbSimulateUpgradeBefore');
+
 		// simulate core DB upgrade
 		\OC_DB::simulateUpdateDbFromStructure(\OC::$SERVERROOT . '/db_structure.xml');
 
@@ -344,6 +346,8 @@ class Updater extends BasicEmitter {
 	}
 
 	protected function doCoreUpgrade() {
+		$this->emit('\OC\Updater', 'dbUpgradeBefore');
+
 		// do the real upgrade
 		\OC_DB::updateDbFromStructure(\OC::$SERVERROOT . '/db_structure.xml');
 
@@ -355,6 +359,7 @@ class Updater extends BasicEmitter {
 	 */
 	protected function checkAppUpgrade($version) {
 		$apps = \OC_App::getEnabledApps();
+		$this->emit('\OC\Updater', 'appUpgradeCheckBefore');
 
 		foreach ($apps as $appId) {
 			$info = \OC_App::getAppInfo($appId);
@@ -372,6 +377,7 @@ class Updater extends BasicEmitter {
 					$this->includePreUpdate($appId);
 				}
 				if (file_exists(\OC_App::getAppPath($appId) . '/appinfo/database.xml')) {
+					$this->emit('\OC\Updater', 'appSimulateUpdate', array($appId));
 					\OC_DB::simulateUpdateDbFromStructure(\OC_App::getAppPath($appId) . '/appinfo/database.xml');
 				}
 			}