cleanupRemovedModules.php

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<?php
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 );