maintenance/cleanupRemovedModules.php

   1 <?php
   2 /**
   3  * Remove cache entries for removed ResourceLoader modules from the database.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Maintenance
  22  * @author Roan Kattouw
  23  */
  24
  25 require_once( __DIR__ . '/Maintenance.php' );
  26
  27 /**
  28  * Maintenance script to remove cache entries for removed ResourceLoader modules
  29  * from the database.
  30  *
  31  * @ingroup Maintenance
  32  */
  33 class CleanupRemovedModules extends Maintenance {
  34
  35         public function __construct() {
  36                 parent::__construct();
  37                 $this->mDescription = 'Remove cache entries for removed ResourceLoader modules from the database';
  38                 $this->addOption( 'batchsize', 'Delete rows in batches of this size. Default: 500', false, true );
  39                 $this->addOption( 'max-slave-lag', 'If the slave lag exceeds this many seconds, wait until it drops below this value. Default: 5', false, true );
  40         }
  41
  42         public function execute() {
  43                 $dbw = wfGetDB( DB_MASTER );
  44                 $rl = new ResourceLoader();
  45                 $moduleNames = $rl->getModuleNames();
  46                 $moduleList = implode( ', ', array_map( array( $dbw, 'addQuotes' ), $moduleNames ) );
  47                 $limit = max( 1, intval( $this->getOption( 'batchsize', 500 ) ) );
  48                 $maxlag = intval( $this->getOption( 'max-slave-lag', 5 ) );
  49
  50                 $this->output( "Cleaning up module_deps table...\n" );
  51                 $i = 1;
  52                 $modDeps = $dbw->tableName( 'module_deps' );
  53                 do {
  54                         // $dbw->delete() doesn't support LIMIT :(
  55                         $where = $moduleList ? "md_module NOT IN ($moduleList)" : '1=1';
  56                         $dbw->query( "DELETE FROM $modDeps WHERE $where LIMIT $limit", __METHOD__ );
  57                         $numRows = $dbw->affectedRows();
  58                         $this->output( "Batch $i: $numRows rows\n" );
  59                         $i++;
  60                         wfWaitForSlaves( $maxlag );
  61                 } while ( $numRows > 0 );
  62                 $this->output( "done\n" );
  63
  64                 $this->output( "Cleaning up msg_resource table...\n" );
  65                 $i = 1;
  66
  67                 $mrRes = $dbw->tableName( 'msg_resource' );
  68                 do {
  69                         $where = $moduleList ? "mr_resource NOT IN ($moduleList)" : '1=1';
  70                         $dbw->query( "DELETE FROM $mrRes WHERE $where LIMIT $limit", __METHOD__ );
  71                         $numRows = $dbw->affectedRows();
  72                         $this->output( "Batch $i: $numRows rows\n" );
  73                         $i++;
  74                         wfWaitForSlaves( $maxlag );
  75                 } while ( $numRows > 0 );
  76                 $this->output( "done\n" );
  77
  78                 $this->output( "Cleaning up msg_resource_links table...\n" );
  79                 $i = 1;
  80                 $msgResLinks = $dbw->tableName( 'msg_resource_links' );
  81                 do {
  82                         $where = $moduleList ? "mrl_resource NOT IN ($moduleList)" : '1=1';
  83                         $dbw->query( "DELETE FROM $msgResLinks WHERE $where LIMIT $limit", __METHOD__ );
  84                         $numRows = $dbw->affectedRows();
  85                         $this->output( "Batch $i: $numRows rows\n" );
  86                         $i++;
  87                         wfWaitForSlaves( $maxlag );
  88                 } while ( $numRows > 0 );
  89                 $this->output( "done\n" );
  90         }
  91 }
  92
  93 $maintClass = "CleanupRemovedModules";
  94 require_once( RUN_MAINTENANCE_IF_MAIN );