654 lines
19 KiB
PHP
654 lines
19 KiB
PHP
<?php
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/**
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* @copyright Copyright (c) 2017 Joas Schilling <coding@schilljs.com>
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* @copyright Copyright (c) 2017, ownCloud GmbH
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*
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* @author Christoph Wurst <christoph@winzerhof-wurst.at>
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* @author Daniel Kesselberg <mail@danielkesselberg.de>
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* @author Joas Schilling <coding@schilljs.com>
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* @author Julius Härtl <jus@bitgrid.net>
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* @author Morris Jobke <hey@morrisjobke.de>
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* @author Robin Appelman <robin@icewind.nl>
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*
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* @license AGPL-3.0
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*
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* This code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License, version 3,
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License, version 3,
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*
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*/
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namespace OC\DB;
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use Doctrine\DBAL\Exception\DriverException;
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use Doctrine\DBAL\Platforms\OraclePlatform;
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use Doctrine\DBAL\Platforms\PostgreSQL94Platform;
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use Doctrine\DBAL\Schema\Index;
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use Doctrine\DBAL\Schema\Schema;
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use Doctrine\DBAL\Schema\SchemaException;
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use Doctrine\DBAL\Schema\Sequence;
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use Doctrine\DBAL\Schema\Table;
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use Doctrine\DBAL\Types\Types;
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use OC\App\InfoParser;
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use OC\IntegrityCheck\Helpers\AppLocator;
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use OC\Migration\SimpleOutput;
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use OCP\AppFramework\App;
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use OCP\AppFramework\QueryException;
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use OCP\Migration\IMigrationStep;
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use OCP\Migration\IOutput;
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class MigrationService {
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/** @var boolean */
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private $migrationTableCreated;
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/** @var array */
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private $migrations;
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/** @var IOutput */
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private $output;
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/** @var Connection */
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private $connection;
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/** @var string */
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private $appName;
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/** @var bool */
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private $checkOracle;
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/**
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* MigrationService constructor.
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*
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* @param $appName
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* @param Connection $connection
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* @param AppLocator $appLocator
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* @param IOutput|null $output
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* @throws \Exception
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*/
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public function __construct($appName, Connection $connection, IOutput $output = null, AppLocator $appLocator = null) {
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$this->appName = $appName;
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$this->connection = $connection;
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$this->output = $output;
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if (null === $this->output) {
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$this->output = new SimpleOutput(\OC::$server->getLogger(), $appName);
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}
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if ($appName === 'core') {
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$this->migrationsPath = \OC::$SERVERROOT . '/core/Migrations';
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$this->migrationsNamespace = 'OC\\Core\\Migrations';
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$this->checkOracle = true;
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} else {
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if (null === $appLocator) {
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$appLocator = new AppLocator();
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}
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$appPath = $appLocator->getAppPath($appName);
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$namespace = App::buildAppNamespace($appName);
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$this->migrationsPath = "$appPath/lib/Migration";
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$this->migrationsNamespace = $namespace . '\\Migration';
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$infoParser = new InfoParser();
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$info = $infoParser->parse($appPath . '/appinfo/info.xml');
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if (!isset($info['dependencies']['database'])) {
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$this->checkOracle = true;
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} else {
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$this->checkOracle = false;
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foreach ($info['dependencies']['database'] as $database) {
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if (\is_string($database) && $database === 'oci') {
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$this->checkOracle = true;
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} elseif (\is_array($database) && isset($database['@value']) && $database['@value'] === 'oci') {
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$this->checkOracle = true;
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}
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}
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}
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}
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}
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/**
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* Returns the name of the app for which this migration is executed
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*
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* @return string
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*/
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public function getApp() {
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return $this->appName;
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}
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/**
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* @return bool
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* @codeCoverageIgnore - this will implicitly tested on installation
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*/
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private function createMigrationTable() {
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if ($this->migrationTableCreated) {
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return false;
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}
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if ($this->connection->tableExists('migrations') && \OC::$server->getConfig()->getAppValue('core', 'vendor', '') !== 'owncloud') {
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$this->migrationTableCreated = true;
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return false;
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}
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$schema = new SchemaWrapper($this->connection);
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/**
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* We drop the table when it has different columns or the definition does not
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* match. E.g. ownCloud uses a length of 177 for app and 14 for version.
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*/
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try {
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$table = $schema->getTable('migrations');
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$columns = $table->getColumns();
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if (count($columns) === 2) {
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try {
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$column = $table->getColumn('app');
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$schemaMismatch = $column->getLength() !== 255;
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if (!$schemaMismatch) {
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$column = $table->getColumn('version');
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$schemaMismatch = $column->getLength() !== 255;
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}
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} catch (SchemaException $e) {
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// One of the columns is missing
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$schemaMismatch = true;
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}
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if (!$schemaMismatch) {
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// Table exists and schema matches: return back!
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$this->migrationTableCreated = true;
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return false;
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}
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}
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// Drop the table, when it didn't match our expectations.
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$this->connection->dropTable('migrations');
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// Recreate the schema after the table was dropped.
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$schema = new SchemaWrapper($this->connection);
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} catch (SchemaException $e) {
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// Table not found, no need to panic, we will create it.
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}
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$table = $schema->createTable('migrations');
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$table->addColumn('app', Types::STRING, ['length' => 255]);
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$table->addColumn('version', Types::STRING, ['length' => 255]);
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$table->setPrimaryKey(['app', 'version']);
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$this->connection->migrateToSchema($schema->getWrappedSchema());
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$this->migrationTableCreated = true;
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return true;
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}
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/**
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* Returns all versions which have already been applied
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*
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* @return string[]
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* @codeCoverageIgnore - no need to test this
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*/
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public function getMigratedVersions() {
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$this->createMigrationTable();
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$qb = $this->connection->getQueryBuilder();
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$qb->select('version')
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->from('migrations')
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->where($qb->expr()->eq('app', $qb->createNamedParameter($this->getApp())))
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->orderBy('version');
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$result = $qb->execute();
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$rows = $result->fetchAll(\PDO::FETCH_COLUMN);
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$result->closeCursor();
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return $rows;
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}
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/**
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* Returns all versions which are available in the migration folder
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*
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* @return array
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*/
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public function getAvailableVersions() {
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$this->ensureMigrationsAreLoaded();
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return array_map('strval', array_keys($this->migrations));
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}
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protected function findMigrations() {
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$directory = realpath($this->migrationsPath);
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if ($directory === false || !file_exists($directory) || !is_dir($directory)) {
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return [];
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}
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$iterator = new \RegexIterator(
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new \RecursiveIteratorIterator(
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new \RecursiveDirectoryIterator($directory, \FilesystemIterator::SKIP_DOTS),
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\RecursiveIteratorIterator::LEAVES_ONLY
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),
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'#^.+\\/Version[^\\/]{1,255}\\.php$#i',
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\RegexIterator::GET_MATCH);
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$files = array_keys(iterator_to_array($iterator));
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uasort($files, function ($a, $b) {
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preg_match('/^Version(\d+)Date(\d+)\\.php$/', basename($a), $matchA);
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preg_match('/^Version(\d+)Date(\d+)\\.php$/', basename($b), $matchB);
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if (!empty($matchA) && !empty($matchB)) {
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if ($matchA[1] !== $matchB[1]) {
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return ($matchA[1] < $matchB[1]) ? -1 : 1;
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}
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return ($matchA[2] < $matchB[2]) ? -1 : 1;
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}
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return (basename($a) < basename($b)) ? -1 : 1;
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});
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$migrations = [];
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foreach ($files as $file) {
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$className = basename($file, '.php');
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$version = (string) substr($className, 7);
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if ($version === '0') {
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throw new \InvalidArgumentException(
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"Cannot load a migrations with the name '$version' because it is a reserved number"
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);
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}
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$migrations[$version] = sprintf('%s\\%s', $this->migrationsNamespace, $className);
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}
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return $migrations;
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}
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/**
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* @param string $to
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* @return string[]
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*/
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private function getMigrationsToExecute($to) {
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$knownMigrations = $this->getMigratedVersions();
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$availableMigrations = $this->getAvailableVersions();
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$toBeExecuted = [];
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foreach ($availableMigrations as $v) {
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if ($to !== 'latest' && $v > $to) {
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continue;
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}
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if ($this->shallBeExecuted($v, $knownMigrations)) {
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$toBeExecuted[] = $v;
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}
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}
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return $toBeExecuted;
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}
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/**
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* @param string $m
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* @param string[] $knownMigrations
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* @return bool
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*/
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private function shallBeExecuted($m, $knownMigrations) {
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if (in_array($m, $knownMigrations)) {
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return false;
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}
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return true;
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}
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/**
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* @param string $version
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*/
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private function markAsExecuted($version) {
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$this->connection->insertIfNotExist('*PREFIX*migrations', [
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'app' => $this->appName,
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'version' => $version
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]);
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}
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/**
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* Returns the name of the table which holds the already applied versions
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*
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* @return string
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*/
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public function getMigrationsTableName() {
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return $this->connection->getPrefix() . 'migrations';
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}
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/**
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* Returns the namespace of the version classes
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*
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* @return string
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*/
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public function getMigrationsNamespace() {
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return $this->migrationsNamespace;
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}
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/**
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* Returns the directory which holds the versions
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*
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* @return string
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*/
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public function getMigrationsDirectory() {
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return $this->migrationsPath;
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}
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/**
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* Return the explicit version for the aliases; current, next, prev, latest
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*
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* @param string $alias
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* @return mixed|null|string
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*/
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public function getMigration($alias) {
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switch ($alias) {
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case 'current':
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return $this->getCurrentVersion();
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case 'next':
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return $this->getRelativeVersion($this->getCurrentVersion(), 1);
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case 'prev':
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return $this->getRelativeVersion($this->getCurrentVersion(), -1);
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case 'latest':
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$this->ensureMigrationsAreLoaded();
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$migrations = $this->getAvailableVersions();
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return @end($migrations);
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}
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return '0';
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}
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/**
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* @param string $version
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* @param int $delta
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* @return null|string
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*/
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private function getRelativeVersion($version, $delta) {
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$this->ensureMigrationsAreLoaded();
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$versions = $this->getAvailableVersions();
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array_unshift($versions, 0);
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$offset = array_search($version, $versions, true);
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if ($offset === false || !isset($versions[$offset + $delta])) {
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// Unknown version or delta out of bounds.
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return null;
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}
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return (string) $versions[$offset + $delta];
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}
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/**
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* @return string
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*/
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private function getCurrentVersion() {
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$m = $this->getMigratedVersions();
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if (count($m) === 0) {
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return '0';
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}
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$migrations = array_values($m);
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return @end($migrations);
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}
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/**
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* @param string $version
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* @return string
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* @throws \InvalidArgumentException
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*/
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private function getClass($version) {
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$this->ensureMigrationsAreLoaded();
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if (isset($this->migrations[$version])) {
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return $this->migrations[$version];
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}
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throw new \InvalidArgumentException("Version $version is unknown.");
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}
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/**
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* Allows to set an IOutput implementation which is used for logging progress and messages
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*
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* @param IOutput $output
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*/
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public function setOutput(IOutput $output) {
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$this->output = $output;
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}
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/**
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* Applies all not yet applied versions up to $to
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*
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* @param string $to
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* @param bool $schemaOnly
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* @throws \InvalidArgumentException
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*/
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public function migrate($to = 'latest', $schemaOnly = false) {
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if ($schemaOnly) {
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$this->migrateSchemaOnly($to);
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return;
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}
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// read known migrations
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$toBeExecuted = $this->getMigrationsToExecute($to);
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foreach ($toBeExecuted as $version) {
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try {
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$this->executeStep($version, $schemaOnly);
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} catch (DriverException $e) {
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// The exception itself does not contain the name of the migration,
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// so we wrap it here, to make debugging easier.
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throw new \Exception('Database error when running migration ' . $to . ' for app ' . $this->getApp(), 0, $e);
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}
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}
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}
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/**
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* Applies all not yet applied versions up to $to
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*
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* @param string $to
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* @throws \InvalidArgumentException
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*/
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public function migrateSchemaOnly($to = 'latest') {
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// read known migrations
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$toBeExecuted = $this->getMigrationsToExecute($to);
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if (empty($toBeExecuted)) {
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return;
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}
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$toSchema = null;
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foreach ($toBeExecuted as $version) {
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$instance = $this->createInstance($version);
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$toSchema = $instance->changeSchema($this->output, function () use ($toSchema) {
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return $toSchema ?: new SchemaWrapper($this->connection);
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}, ['tablePrefix' => $this->connection->getPrefix()]) ?: $toSchema;
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}
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if ($toSchema instanceof SchemaWrapper) {
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$targetSchema = $toSchema->getWrappedSchema();
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if ($this->checkOracle) {
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$beforeSchema = $this->connection->createSchema();
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$this->ensureOracleConstraints($beforeSchema, $targetSchema, strlen($this->connection->getPrefix()));
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}
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$this->connection->migrateToSchema($targetSchema);
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$toSchema->performDropTableCalls();
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}
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foreach ($toBeExecuted as $version) {
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$this->markAsExecuted($version);
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}
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}
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/**
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* Get the human readable descriptions for the migration steps to run
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*
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* @param string $to
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* @return string[] [$name => $description]
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*/
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public function describeMigrationStep($to = 'latest') {
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$toBeExecuted = $this->getMigrationsToExecute($to);
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$description = [];
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foreach ($toBeExecuted as $version) {
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$migration = $this->createInstance($version);
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if ($migration->name()) {
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$description[$migration->name()] = $migration->description();
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}
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}
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return $description;
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}
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/**
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* @param string $version
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* @return IMigrationStep
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* @throws \InvalidArgumentException
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*/
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protected function createInstance($version) {
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$class = $this->getClass($version);
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try {
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$s = \OC::$server->query($class);
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if (!$s instanceof IMigrationStep) {
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throw new \InvalidArgumentException('Not a valid migration');
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}
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} catch (QueryException $e) {
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if (class_exists($class)) {
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$s = new $class();
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} else {
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throw new \InvalidArgumentException("Migration step '$class' is unknown");
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}
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}
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return $s;
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}
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/**
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* Executes one explicit version
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*
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* @param string $version
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* @param bool $schemaOnly
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* @throws \InvalidArgumentException
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*/
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public function executeStep($version, $schemaOnly = false) {
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$instance = $this->createInstance($version);
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if (!$schemaOnly) {
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$instance->preSchemaChange($this->output, function () {
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return new SchemaWrapper($this->connection);
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}, ['tablePrefix' => $this->connection->getPrefix()]);
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}
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$toSchema = $instance->changeSchema($this->output, function () {
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return new SchemaWrapper($this->connection);
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}, ['tablePrefix' => $this->connection->getPrefix()]);
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if ($toSchema instanceof SchemaWrapper) {
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$targetSchema = $toSchema->getWrappedSchema();
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if ($this->checkOracle) {
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$sourceSchema = $this->connection->createSchema();
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$this->ensureOracleConstraints($sourceSchema, $targetSchema, strlen($this->connection->getPrefix()));
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}
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$this->connection->migrateToSchema($targetSchema);
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$toSchema->performDropTableCalls();
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}
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if (!$schemaOnly) {
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$instance->postSchemaChange($this->output, function () {
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return new SchemaWrapper($this->connection);
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}, ['tablePrefix' => $this->connection->getPrefix()]);
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}
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$this->markAsExecuted($version);
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}
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/**
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* Naming constraints:
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* - Tables names must be 30 chars or shorter (27 + oc_ prefix)
|
|
* - Column names must be 30 chars or shorter
|
|
* - Index names must be 30 chars or shorter
|
|
* - Sequence names must be 30 chars or shorter
|
|
* - Primary key names must be set or the table name 23 chars or shorter
|
|
*
|
|
* Data constraints:
|
|
* - Columns with "NotNull" can not have empty string as default value
|
|
* - Columns with "NotNull" can not have number 0 as default value
|
|
* - Columns with type "bool" (which is in fact integer of length 1) can not be "NotNull" as it can not store 0/false
|
|
*
|
|
* @param Schema $sourceSchema
|
|
* @param Schema $targetSchema
|
|
* @param int $prefixLength
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|
* @throws \Doctrine\DBAL\Exception
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|
*/
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|
public function ensureOracleConstraints(Schema $sourceSchema, Schema $targetSchema, int $prefixLength) {
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|
$sequences = $targetSchema->getSequences();
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|
|
|
foreach ($targetSchema->getTables() as $table) {
|
|
try {
|
|
$sourceTable = $sourceSchema->getTable($table->getName());
|
|
} catch (SchemaException $e) {
|
|
if (\strlen($table->getName()) - $prefixLength > 27) {
|
|
throw new \InvalidArgumentException('Table name "' . $table->getName() . '" is too long.');
|
|
}
|
|
$sourceTable = null;
|
|
}
|
|
|
|
foreach ($table->getColumns() as $thing) {
|
|
if ((!$sourceTable instanceof Table || !$sourceTable->hasColumn($thing->getName())) && \strlen($thing->getName()) > 30) {
|
|
throw new \InvalidArgumentException('Column name "' . $table->getName() . '"."' . $thing->getName() . '" is too long.');
|
|
}
|
|
|
|
if ((!$sourceTable instanceof Table || !$sourceTable->hasColumn($thing->getName())) && $thing->getNotnull() && $thing->getDefault() === ''
|
|
&& $sourceTable instanceof Table && !$sourceTable->hasColumn($thing->getName())) {
|
|
throw new \InvalidArgumentException('Column "' . $table->getName() . '"."' . $thing->getName() . '" is NotNull, but has empty string or null as default.');
|
|
}
|
|
|
|
if ((!$sourceTable instanceof Table || !$sourceTable->hasColumn($thing->getName())) && $thing->getNotnull() && $thing->getType()->getName() === Types::BOOLEAN) {
|
|
throw new \InvalidArgumentException('Column "' . $table->getName() . '"."' . $thing->getName() . '" is type Bool and also NotNull, so it can not store "false".');
|
|
}
|
|
}
|
|
|
|
foreach ($table->getIndexes() as $thing) {
|
|
if ((!$sourceTable instanceof Table || !$sourceTable->hasIndex($thing->getName())) && \strlen($thing->getName()) > 30) {
|
|
throw new \InvalidArgumentException('Index name "' . $table->getName() . '"."' . $thing->getName() . '" is too long.');
|
|
}
|
|
}
|
|
|
|
foreach ($table->getForeignKeys() as $thing) {
|
|
if ((!$sourceTable instanceof Table || !$sourceTable->hasForeignKey($thing->getName())) && \strlen($thing->getName()) > 30) {
|
|
throw new \InvalidArgumentException('Foreign key name "' . $table->getName() . '"."' . $thing->getName() . '" is too long.');
|
|
}
|
|
}
|
|
|
|
$primaryKey = $table->getPrimaryKey();
|
|
if ($primaryKey instanceof Index && (!$sourceTable instanceof Table || !$sourceTable->hasPrimaryKey())) {
|
|
$indexName = strtolower($primaryKey->getName());
|
|
$isUsingDefaultName = $indexName === 'primary';
|
|
|
|
if ($this->connection->getDatabasePlatform() instanceof PostgreSQL94Platform) {
|
|
$defaultName = $table->getName() . '_pkey';
|
|
$isUsingDefaultName = strtolower($defaultName) === $indexName;
|
|
|
|
if ($isUsingDefaultName) {
|
|
$sequenceName = $table->getName() . '_' . implode('_', $primaryKey->getColumns()) . '_seq';
|
|
$sequences = array_filter($sequences, function (Sequence $sequence) use ($sequenceName) {
|
|
return $sequence->getName() !== $sequenceName;
|
|
});
|
|
}
|
|
} elseif ($this->connection->getDatabasePlatform() instanceof OraclePlatform) {
|
|
$defaultName = $table->getName() . '_seq';
|
|
$isUsingDefaultName = strtolower($defaultName) === $indexName;
|
|
}
|
|
|
|
if (!$isUsingDefaultName && \strlen($indexName) > 30) {
|
|
throw new \InvalidArgumentException('Primary index name on "' . $table->getName() . '" is too long.');
|
|
}
|
|
if ($isUsingDefaultName && \strlen($table->getName()) - $prefixLength >= 23) {
|
|
throw new \InvalidArgumentException('Primary index name on "' . $table->getName() . '" is too long.');
|
|
}
|
|
}
|
|
}
|
|
|
|
foreach ($sequences as $sequence) {
|
|
if (!$sourceSchema->hasSequence($sequence->getName()) && \strlen($sequence->getName()) > 30) {
|
|
throw new \InvalidArgumentException('Sequence name "' . $sequence->getName() . '" is too long.');
|
|
}
|
|
}
|
|
}
|
|
|
|
private function ensureMigrationsAreLoaded() {
|
|
if (empty($this->migrations)) {
|
|
$this->migrations = $this->findMigrations();
|
|
}
|
|
}
|
|
}
|