maintenance/nukeNS.php

   1 <?php
   2 /**
   3  * Remove pages with only 1 revision from the MediaWiki namespace, without
   4  * flooding recent changes, delete logs, etc.
   5  * Irreversible (can't use standard undelete) and does not update link tables
   6  *
   7  * This is mainly useful to run before maintenance/update.php when upgrading
   8  * to 1.9, to prevent flooding recent changes/deletion logs.  It's intended
   9  * to be conservative, so it's possible that a few entries will be left for
  10  * deletion by the upgrade script.  It's also possible that it hasn't been
  11  * tested thouroughly enough, and will delete something it shouldn't; so
  12  * back up your DB if there's anything in the MediaWiki that is important to
  13  * you.
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License along
  26  * with this program; if not, write to the Free Software Foundation, Inc.,
  27  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  28  * http://www.gnu.org/copyleft/gpl.html
  29  *
  30  * @file
  31  * @ingroup Maintenance
  32  * @author Steve Sanbeg
  33  * based on nukePage by Rob Church
  34  */
  35
  36 require_once __DIR__ . '/Maintenance.php';
  37
  38 use MediaWiki\Title\Title;
  39
  40 /**
  41  * Maintenance script that removes pages with only one revision from the
  42  * MediaWiki namespace.
  43  *
  44  * @ingroup Maintenance
  45  */
  46 class NukeNS extends Maintenance {
  47         public function __construct() {
  48                 parent::__construct();
  49                 $this->addDescription( 'Remove pages with only 1 revision from any namespace' );
  50                 $this->addOption( 'delete', "Actually delete the page" );
  51                 $this->addOption( 'ns', 'Namespace to delete from, default NS_MEDIAWIKI', false, true );
  52                 $this->addOption( 'all', 'Delete everything regardless of revision count' );
  53         }
  54
  55         public function execute() {
  56                 $ns = $this->getOption( 'ns', NS_MEDIAWIKI );
  57                 $delete = $this->hasOption( 'delete' );
  58                 $all = $this->hasOption( 'all' );
  59                 $dbw = $this->getDB( DB_PRIMARY );
  60                 $this->beginTransaction( $dbw, __METHOD__ );
  61
  62                 $res = $dbw->newSelectQueryBuilder()
  63                         ->select( 'page_title' )
  64                         ->from( 'page' )
  65                         ->where( [ 'page_namespace' => $ns ] )
  66                         ->caller( __METHOD__ )->fetchResultSet();
  67
  68                 $n_deleted = 0;
  69
  70                 foreach ( $res as $row ) {
  71                         // echo "$ns_name:".$row->page_title, "\n";
  72                         $title = Title::makeTitle( $ns, $row->page_title );
  73                         $id = $title->getArticleID();
  74
  75                         // Get corresponding revisions
  76                         $revs = $dbw->newSelectQueryBuilder()
  77                                 ->select( 'rev_id' )
  78                                 ->from( 'revision' )
  79                                 ->where( [ 'rev_page' => $id ] )
  80                                 ->caller( __METHOD__ )->fetchFieldValues();
  81                         $count = count( $revs );
  82
  83                         // skip anything that looks modified (i.e. multiple revs)
  84                         if ( $all || $count == 1 ) {
  85                                 # echo $title->getPrefixedText(), "\t", $count, "\n";
  86                                 $this->output( "delete: " . $title->getPrefixedText() . "\n" );
  87
  88                                 // as much as I hate to cut & paste this, it's a little different, and
  89                                 // I already have the id & revs
  90                                 if ( $delete ) {
  91                                         $dbw->delete( 'page', [ 'page_id' => $id ], __METHOD__ );
  92                                         $this->commitTransaction( $dbw, __METHOD__ );
  93                                         // Delete revisions as appropriate
  94                                         /** @var NukePage $child */
  95                                         $child = $this->runChild( NukePage::class, 'nukePage.php' );
  96                                         '@phan-var NukePage $child';
  97                                         $child->deleteRevisions( $revs );
  98                                         $n_deleted++;
  99                                 }
 100                         } else {
 101                                 $this->output( "skip: " . $title->getPrefixedText() . "\n" );
 102                         }
 103                 }
 104                 $this->commitTransaction( $dbw, __METHOD__ );
 105
 106                 if ( $n_deleted > 0 ) {
 107                         $this->purgeRedundantText( true );
 108
 109                         # update statistics - better to decrement existing count, or just count
 110                         # the page table?
 111                         $pages = $dbw->newSelectQueryBuilder()
 112                                 ->select( 'ss_total_pages' )
 113                                 ->from( 'site_stats' )
 114                                 ->caller( __METHOD__ )->fetchField();
 115                         $pages -= $n_deleted;
 116                         $dbw->update(
 117                                 'site_stats',
 118                                 [ 'ss_total_pages' => $pages ],
 119                                 [ 'ss_row_id' => 1 ],
 120                                 __METHOD__
 121                         );
 122                 }
 123
 124                 if ( !$delete ) {
 125                         $this->output( "To update the database, run the script with the --delete option.\n" );
 126                 }
 127         }
 128 }
 129
 130 $maintClass = NukeNS::class;
 131 require_once RUN_MAINTENANCE_IF_MAIN;