Add DB table to extend filecache with metadata etag

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

core/Migrations/Version16000Date20190215125511.php

@@ -0,0 +1,60 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2019 Morris Jobke <hey@morrisjobke.de>
+ *
+ * @author Morris Jobke <hey@morrisjobke.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 OC\Core\Migrations;
+
+use Closure;
+use OCP\DB\ISchemaWrapper;
+use OCP\Migration\SimpleMigrationStep;
+use OCP\Migration\IOutput;
+
+class Version16000Date20190215125511 extends SimpleMigrationStep {
+
+	/**
+	 * @param IOutput $output
+	 * @param Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
+	 * @param array $options
+	 * @return ISchemaWrapper
+	 */
+	public function changeSchema(IOutput $output, Closure $schemaClosure, array $options) {
+		/** @var ISchemaWrapper $schema */
+		$schema = $schemaClosure();
+		if(!$schema->hasTable('filecache_extended')) {
+			$table = $schema->createTable('filecache_extended');
+			$table->addColumn('fileid', 'integer', [
+				'notnull' => true,
+				'length' => 4,
+				'unsigned' => true,
+			]);
+			$table->addColumn('metadata_etag', 'string', [
+				'notnull' => false,
+				'length' => 40,
+			]);
+			$table->addUniqueIndex(['fileid']);
+		}
+
+		return $schema;
+	}
+}

version.php

@@ -29,7 +29,7 @@
 // between betas, final and RCs. This is _not_ the public version number. Reset minor/patchlevel
 // when updating major/minor version number.
 
-$OC_Version = array(16, 0, 0, 0);
+$OC_Version = array(16, 0, 0, 1);
 
 // The human readable string
 $OC_VersionString = '16.0.0 alpha';