remove the requirement that everything that looks like a placeholder is substituted

While maybe not common, `$` is a valid option in config fields

Signed-off-by: Robin Appelman <robin@icewind.nl>

apps/files_external/lib/config.php

@@ -252,20 +252,6 @@ class OC_Mount_Config {
 				continue;
 			}
 			$option = self::substitutePlaceholdersInConfig($option);
-			if(!self::arePlaceholdersSubstituted($option)) {
-				\OC::$server->getLogger()->error(
-					'A placeholder was not substituted: {option} for mount type {class}',
-					[
-						'app' => 'files_external',
-						'option' => $option,
-						'class' => $class,
-					]
-				);
-				throw new StorageNotAvailableException(
-					'Mount configuration incomplete',
-					StorageNotAvailableException::STATUS_INCOMPLETE_CONF
-				);
-			}
 		}
 		if (class_exists($class)) {
 			try {
@@ -290,20 +276,6 @@ class OC_Mount_Config {
 		return StorageNotAvailableException::STATUS_ERROR;
 	}
 
-	public static function arePlaceholdersSubstituted($option):bool {
-		$result = true;
-		if(is_array($option)) {
-			foreach ($option as $optionItem) {
-				$result = $result && self::arePlaceholdersSubstituted($optionItem);
-			}
-		} else if (is_string($option)) {
-			if (strpos(rtrim($option, '$'), '$') !== false) {
-				$result = false;
-			}
-		}
-		return $result;
-	}
-
 	/**
 	 * Read the mount points in the config file into an array
 	 *

apps/files_external/tests/Config/PlaceholderSubstituteTest.php

@@ -1,49 +0,0 @@
-<?php
-/**
- * @copyright Copyright (c) 2019 Daniel Kesselberg <mail@danielkesselberg.de>
- *
- * @author Daniel Kesselberg <mail@danielkesselberg.de>
- *
- * @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 OCA\files_external\tests\Config;
-
-use OC_Mount_Config;
-use Test\TestCase;
-
-class PlaceholderSubstituteTest extends TestCase {
-
-	public function dataArePlaceholdersSubstituted(): array {
-		return [
-			['smb_$user', false],
-			['hidden_share$', true],
-			[['smb_$user', 'hidden_share$'], false],
-			[['smb_hello', 'hidden_share$'], true]
-		];
-	}
-
-	/**
-	 * @dataProvider dataArePlaceholdersSubstituted
-	 * @param string|array $option
-	 * @param bool $expected
-	 */
-	public function testArePlaceholdersSubstituted($option, $expected): void {
-		$this->assertSame($expected, OC_Mount_Config::arePlaceholdersSubstituted($option));
-	}
-
-}