[stable20] make ILDAPProviderFactory usable when there is no ldap setup

lib/composer/composer/autoload_classmap.php

@@ -1148,6 +1148,7 @@
     'OC\\L10N\\LanguageIterator' => $baseDir . '/lib/private/L10N/LanguageIterator.php',
     'OC\\L10N\\LanguageNotFoundException' => $baseDir . '/lib/private/L10N/LanguageNotFoundException.php',
     'OC\\L10N\\LazyL10N' => $baseDir . '/lib/private/L10N/LazyL10N.php',
+    'OC\\LDAP\\NullLDAPProviderFactory' => $baseDir . '/lib/private/LDAP/NullLDAPProviderFactory.php',
     'OC\\LargeFileHelper' => $baseDir . '/lib/private/LargeFileHelper.php',
     'OC\\Lock\\AbstractLockingProvider' => $baseDir . '/lib/private/Lock/AbstractLockingProvider.php',
     'OC\\Lock\\DBLockingProvider' => $baseDir . '/lib/private/Lock/DBLockingProvider.php',

lib/composer/composer/autoload_static.php

@@ -1177,6 +1177,7 @@ class ComposerStaticInit53792487c5a8370acc0b06b1a864ff4c
         'OC\\L10N\\LanguageIterator' => __DIR__ . '/../../..' . '/lib/private/L10N/LanguageIterator.php',
         'OC\\L10N\\LanguageNotFoundException' => __DIR__ . '/../../..' . '/lib/private/L10N/LanguageNotFoundException.php',
         'OC\\L10N\\LazyL10N' => __DIR__ . '/../../..' . '/lib/private/L10N/LazyL10N.php',
+        'OC\\LDAP\\NullLDAPProviderFactory' => __DIR__ . '/../../..' . '/lib/private/LDAP/NullLDAPProviderFactory.php',
         'OC\\LargeFileHelper' => __DIR__ . '/../../..' . '/lib/private/LargeFileHelper.php',
         'OC\\Lock\\AbstractLockingProvider' => __DIR__ . '/../../..' . '/lib/private/Lock/AbstractLockingProvider.php',
         'OC\\Lock\\DBLockingProvider' => __DIR__ . '/../../..' . '/lib/private/Lock/DBLockingProvider.php',

lib/private/LDAP/NullLDAPProviderFactory.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2021 Robin Appelman <robin@icewind.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OC\LDAP;
+
+use OCP\IServerContainer;
+use OCP\LDAP\ILDAPProviderFactory;
+
+class NullLDAPProviderFactory implements ILDAPProviderFactory {
+	public function __construct(IServerContainer $serverContainer) {
+	}
+
+	public function getLDAPProvider() {
+		throw new \Exception("No LDAP provider is available");
+	}
+}

lib/private/Server.php

@@ -197,6 +197,8 @@
 use OCP\IUserManager;
 use OCP\IUserSession;
 use OCP\L10N\IFactory;
+use OCP\LDAP\ILDAPProvider;
+use OCP\LDAP\ILDAPProviderFactory;
 use OCP\Lock\ILockingProvider;
 use OCP\Log\ILogFactory;
 use OCP\Mail\IMailer;
@@ -1002,10 +1004,13 @@ public function __construct($webRoot, \OC\Config $config) {
 			$config = $c->getConfig();
 			$factoryClass = $config->getSystemValue('ldapProviderFactory', null);
 			if (is_null($factoryClass)) {
-				throw new \Exception('ldapProviderFactory not set');
+				return new NullLDAPProviderFactory($this);
 			}
 			/** @var \OCP\LDAP\ILDAPProviderFactory $factory */
-			$factory = new $factoryClass($this);
+			return new $factoryClass($this);
+		});
+		$this->registerService(ILDAPProvider::class, function (ContainerInterface $c) {
+			$factory = $c->get(ILDAPProviderFactory::class);
 			return $factory->getLDAPProvider();
 		});
 		$this->registerService(ILockingProvider::class, function (Server $c) {

lib/public/LDAP/ILDAPProviderFactory.php

@@ -44,7 +44,7 @@ interface ILDAPProviderFactory {
 	 * @since 11.0.0
 	 */
 	public function __construct(IServerContainer $serverContainer);
-	
+
 	/**
 	 * creates and returns an instance of the ILDAPProvider
 	 *