Start migrations

Fixme:
- Install and update of apps
- No revert on live systems (debug only)
- Service adjustment to our interface
- Loading via autoloader

Signed-off-by: Joas Schilling <coding@schilljs.com>

2 files changed, 66 insertions, 0 deletions

diff --git a/lib/public/IDBConnection.php b/lib/public/IDBConnection.php
index efd65d55f7e..56cf50c5fb3 100644
--- a/lib/public/IDBConnection.php
+++ b/lib/public/IDBConnection.php
@@ -34,6 +34,7 @@
 // use OCP namespace for all classes that are considered public.
 // This means that they should be used by apps instead of the internal ownCloud classes
 namespace OCP;
+use Doctrine\DBAL\Schema\Schema;
 use OCP\DB\QueryBuilder\IQueryBuilder;
 
 /**
@@ -259,4 +260,20 @@ interface IDBConnection {
 	 * @since 11.0.0
 	 */
 	public function supports4ByteText();
+
+	/**
+	 * Create the schema of the connected database
+	 *
+	 * @return Schema
+	 * @since 13.0.0
+	 */
+	public function createSchema();
+
+	/**
+	 * Migrate the database to the given schema
+	 *
+	 * @param Schema $toSchema
+	 * @since 13.0.0
+	 */
+	public function migrateToSchema(Schema $toSchema);
 }
diff --git a/lib/public/Migration/IMigrationStep.php b/lib/public/Migration/IMigrationStep.php
new file mode 100644
index 00000000000..3f95eed7598
--- /dev/null
+++ b/lib/public/Migration/IMigrationStep.php
@@ -0,0 +1,49 @@
+<?php
+/**
+ * @copyright Copyright (c) 2017 Joas Schilling <coding@schilljs.com>
+ *
+ * @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 OCP\Migration;
+
+use Doctrine\DBAL\Schema\Schema;
+
+/**
+ * @since 13.0.0
+ */
+interface IMigrationStep {
+
+	/**
+	 * @param IOutput $output
+	 * @since 13.0.0
+	 */
+	public function preSchemaChange(IOutput $output);
+
+	/**
+	 * @param Schema $schema
+	 * @param array $options
+	 * @since 13.0.0
+	 */
+	public function changeSchema(Schema $schema, array $options);
+
+	/**
+	 * @param IOutput $output
+	 * @since 13.0.0
+	 */
+	public function postSchemaChange(IOutput $output);
+}