1 files changed, 89 insertions, 0 deletions
diff --git a/maintenance/cleanupRemovedModules.php b/maintenance/cleanupRemovedModules.php
new file mode 100644
index 00000000..fb8afd2d
--- /dev/null
+++ b/maintenance/cleanupRemovedModules.php
@@ -0,0 +1,89 @@
+<?php
+/**
+ * Maintenance script to remove cache entries for removed ResourceLoader modules
+ * from the database
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ * @ingroup Maintenance
+ * @author Roan Kattouw
+ */
+
+require_once( dirname( __FILE__ ) . '/Maintenance.php' );
+
+class CleanupRemovedModules extends Maintenance {
+
+	public function __construct() {
+		parent::__construct();
+		$this->mDescription = 'Remove cache entries for removed ResourceLoader modules from the database';
+		$this->addOption( 'batchsize', 'Delete rows in batches of this size. Default: 500', false, true );
+		$this->addOption( 'max-slave-lag', 'If the slave lag exceeds this many seconds, wait until it drops below this value. Default: 5', false, true );
+	}
+
+	public function execute() {
+		$dbw = wfGetDB( DB_MASTER );
+		$rl = new ResourceLoader();
+		$moduleNames = $rl->getModuleNames();
+		$moduleList = implode( ', ', array_map( array( $dbw, 'addQuotes' ), $moduleNames ) );
+		$limit = max( 1, intval( $this->getOption( 'batchsize', 500 ) ) );
+		$maxlag = intval( $this->getOption( 'max-slave-lag', 5 ) );
+
+		$this->output( "Cleaning up module_deps table...\n" );
+		$i = 1;
+		$modDeps = $dbw->tableName( 'module_deps' );
+		do {
+			// $dbw->delete() doesn't support LIMIT :(
+			$where = $moduleList ? "md_module NOT IN ($moduleList)" : '1=1';
+			$dbw->query( "DELETE FROM $modDeps WHERE $where LIMIT $limit", __METHOD__ );
+			$numRows = $dbw->affectedRows();
+			$this->output( "Batch $i: $numRows rows\n" );
+			$i++;
+			wfWaitForSlaves( $maxlag );
+		} while( $numRows > 0 );
+		$this->output( "done\n" );
+
+		$this->output( "Cleaning up msg_resource table...\n" );
+		$i = 1;
+
+		$mrRes = $dbw->tableName( 'msg_resource' );
+		do {
+			$where = $moduleList ? "mr_resource NOT IN ($moduleList)" : '1=1';
+			$dbw->query( "DELETE FROM $mrRes WHERE $where LIMIT $limit", __METHOD__ );
+			$numRows = $dbw->affectedRows();
+			$this->output( "Batch $i: $numRows rows\n" );
+			$i++;
+			wfWaitForSlaves( $maxlag );
+		} while( $numRows > 0 );
+		$this->output( "done\n" );
+
+		$this->output( "Cleaning up msg_resource_links table...\n" );
+		$i = 1;
+		$msgResLinks = $dbw->tableName( 'msg_resource_links' );
+		do {
+			$where = $moduleList ? "mrl_resource NOT IN ($moduleList)" : '1=1';
+			$dbw->query( "DELETE FROM $msgResLinks WHERE $where LIMIT $limit", __METHOD__ );
+			$numRows = $dbw->affectedRows();
+			$this->output( "Batch $i: $numRows rows\n" );
+			$i++;
+			wfWaitForSlaves( $maxlag );
+		} while( $numRows > 0 );
+		$this->output( "done\n" );
+	}
+}
+
+$maintClass = "CleanupRemovedModules";
+require_once( RUN_MAINTENANCE_IF_MAIN );