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>

1 files changed, 115 insertions, 0 deletions

diff --git a/core/Command/Db/Migrations/StatusCommand.php b/core/Command/Db/Migrations/StatusCommand.php
new file mode 100644
index 00000000000..20172000ee3
--- /dev/null
+++ b/core/Command/Db/Migrations/StatusCommand.php
@@ -0,0 +1,115 @@
+<?php
+/**
+ * @author Thomas Müller <thomas.mueller@tmit.eu>
+ *
+ * @copyright Copyright (c) 2017, ownCloud GmbH
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\Core\Command\Db\Migrations;
+
+use OC\DB\MigrationService;
+use OC\Migration\ConsoleOutput;
+use OCP\IDBConnection;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputArgument;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+
+class StatusCommand extends Command {
+
+	/** @var IDBConnection */
+	private $connection;
+
+	/**
+	 * @param IDBConnection $connection
+	 */
+	public function __construct(IDBConnection $connection) {
+		$this->connection = $connection;
+		parent::__construct();
+	}
+
+	protected function configure() {
+		$this
+			->setName('migrations:status')
+			->setDescription('View the status of a set of migrations.')
+			->addArgument('app', InputArgument::REQUIRED, 'Name of the app this migration command shall work on');
+	}
+
+	public function execute(InputInterface $input, OutputInterface $output) {
+		$appName = $input->getArgument('app');
+		$ms = new MigrationService($appName, $this->connection, new ConsoleOutput($output));
+
+		$infos = $this->getMigrationsInfos($ms);
+		foreach ($infos as $key => $value) {
+			$output->writeln("    <comment>>></comment> $key: " . str_repeat(' ', 50 - strlen($key)) . $value);
+		}
+	}
+
+	/**
+	 * @param MigrationService $ms
+	 * @return array associative array of human readable info name as key and the actual information as value
+	 */
+	public function getMigrationsInfos(MigrationService $ms) {
+
+		$executedMigrations = $ms->getMigratedVersions();
+		$availableMigrations = $ms->getAvailableVersions();
+		$executedUnavailableMigrations = array_diff($executedMigrations, array_keys($availableMigrations));
+
+		$numExecutedUnavailableMigrations = count($executedUnavailableMigrations);
+		$numNewMigrations = count(array_diff(array_keys($availableMigrations), $executedMigrations));
+
+		$infos = [
+			'App'								=> $ms->getApp(),
+			'Version Table Name'				=> $ms->getMigrationsTableName(),
+			'Migrations Namespace'				=> $ms->getMigrationsNamespace(),
+			'Migrations Directory'				=> $ms->getMigrationsDirectory(),
+			'Previous Version'					=> $this->getFormattedVersionAlias($ms, 'prev'),
+			'Current Version'					=> $this->getFormattedVersionAlias($ms, 'current'),
+			'Next Version'						=> $this->getFormattedVersionAlias($ms, 'next'),
+			'Latest Version'					=> $this->getFormattedVersionAlias($ms, 'latest'),
+			'Executed Migrations'				=> count($executedMigrations),
+			'Executed Unavailable Migrations'	=> $numExecutedUnavailableMigrations,
+			'Available Migrations'				=> count($availableMigrations),
+			'New Migrations'					=> $numNewMigrations,
+		];
+
+		return $infos;
+	}
+
+	/**
+	 * @param MigrationService $migrationService
+	 * @param string $alias
+	 * @return mixed|null|string
+	 */
+	private function getFormattedVersionAlias(MigrationService $migrationService, $alias) {
+		$migration = $migrationService->getMigration($alias);
+		//No version found
+		if ($migration === null) {
+			if ($alias === 'next') {
+				return 'Already at latest migration step';
+			}
+
+			if ($alias === 'prev') {
+				return 'Already at first migration step';
+			}
+		}
+
+		return $migration;
+	}
+
+
+}