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 // @codeCoverageIgnoreStart
  37 require_once __DIR__ . '/Maintenance.php';
  38 // @codeCoverageIgnoreEnd
  39
  40 use MediaWiki\Maintenance\Maintenance;
  41 use MediaWiki\Title\Title;
  42
  43 /**
  44  * Maintenance script that removes pages with only one revision from the
  45  * MediaWiki namespace.
  46  *
  47  * @ingroup Maintenance
  48  */
  49 class NukeNS extends Maintenance {
  50         public function __construct() {
  51                 parent::__construct();
  52                 $this->addDescription( 'Remove pages with only 1 revision from any namespace' );
  53                 $this->addOption( 'delete', "Actually delete the page" );
  54                 $this->addOption( 'ns', 'Namespace to delete from, default NS_MEDIAWIKI', false, true );
  55                 $this->addOption( 'all', 'Delete everything regardless of revision count' );
  56         }
  57
  58         public function execute() {
  59                 $ns = $this->getOption( 'ns', NS_MEDIAWIKI );
  60                 $delete = $this->hasOption( 'delete' );
  61                 $all = $this->hasOption( 'all' );
  62                 $dbw = $this->getPrimaryDB();
  63                 $this->beginTransaction( $dbw, __METHOD__ );
  64
  65                 $res = $dbw->newSelectQueryBuilder()
  66                         ->select( 'page_title' )
  67                         ->from( 'page' )
  68                         ->where( [ 'page_namespace' => $ns ] )
  69                         ->caller( __METHOD__ )->fetchResultSet();
  70
  71                 $n_deleted = 0;
  72
  73                 foreach ( $res as $row ) {
  74                         // echo "$ns_name:".$row->page_title, "\n";
  75                         $title = Title::makeTitle( $ns, $row->page_title );
  76                         $id = $title->getArticleID();
  77
  78                         // Get corresponding revisions
  79                         $revs = $dbw->newSelectQueryBuilder()
  80                                 ->select( 'rev_id' )
  81                                 ->from( 'revision' )
  82                                 ->where( [ 'rev_page' => $id ] )
  83                                 ->caller( __METHOD__ )->fetchFieldValues();
  84                         $count = count( $revs );
  85
  86                         // skip anything that looks modified (i.e. multiple revs)
  87                         if ( $all || $count == 1 ) {
  88                                 # echo $title->getPrefixedText(), "\t", $count, "\n";
  89                                 $this->output( "delete: " . $title->getPrefixedText() . "\n" );
  90
  91                                 // as much as I hate to cut & paste this, it's a little different, and
  92                                 // I already have the id & revs
  93                                 if ( $delete ) {
  94                                         $dbw->newDeleteQueryBuilder()
  95                                                 ->deleteFrom( 'page' )
  96                                                 ->where( [ 'page_id' => $id ] )
  97                                                 ->caller( __METHOD__ )->execute();
  98                                         $this->commitTransaction( $dbw, __METHOD__ );
  99                                         // Delete revisions as appropriate
 100                                         /** @var NukePage $child */
 101                                         $child = $this->runChild( NukePage::class, 'nukePage.php' );
 102                                         '@phan-var NukePage $child';
 103                                         $child->deleteRevisions( $revs );
 104                                         $n_deleted++;
 105                                 }
 106                         } else {
 107                                 $this->output( "skip: " . $title->getPrefixedText() . "\n" );
 108                         }
 109                 }
 110                 $this->commitTransaction( $dbw, __METHOD__ );
 111
 112                 if ( $n_deleted > 0 ) {
 113                         $this->purgeRedundantText( true );
 114
 115                         # update statistics - better to decrement existing count, or just count
 116                         # the page table?
 117                         $pages = $dbw->newSelectQueryBuilder()
 118                                 ->select( 'ss_total_pages' )
 119                                 ->from( 'site_stats' )
 120                                 ->caller( __METHOD__ )->fetchField();
 121                         $pages -= $n_deleted;
 122                         $dbw->newUpdateQueryBuilder()
 123                                 ->update( 'site_stats' )
 124                                 ->set( [ 'ss_total_pages' => $pages ] )
 125                                 ->where( [ 'ss_row_id' => 1 ] )
 126                                 ->caller( __METHOD__ )
 127                                 ->execute();
 128                 }
 129
 130                 if ( !$delete ) {
 131                         $this->output( "To update the database, run the script with the --delete option.\n" );
 132                 }
 133         }
 134 }
 135
 136 // @codeCoverageIgnoreStart
 137 $maintClass = NukeNS::class;
 138 require_once RUN_MAINTENANCE_IF_MAIN;
 139 // @codeCoverageIgnoreEnd