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- <?php
- /**
- * Look for 'orphan' revisions hooked to pages which don't exist and
- * 'childless' pages with no revisions.
- * Then, kill the poor widows and orphans.
- * Man this is depressing.
- *
- * Copyright © 2005 Brion Vibber <brion@pobox.com>
- * https://www.mediawiki.org/
- *
- * 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
- * @author <brion@pobox.com>
- * @ingroup Maintenance
- */
- require_once __DIR__ . '/Maintenance.php';
- use MediaWiki\MediaWikiServices;
- use Wikimedia\Rdbms\IMaintainableDatabase;
- /**
- * Maintenance script that looks for 'orphan' revisions hooked to pages which
- * don't exist and 'childless' pages with no revisions.
- *
- * @ingroup Maintenance
- */
- class Orphans extends Maintenance {
- public function __construct() {
- parent::__construct();
- $this->addDescription( "Look for 'orphan' revisions hooked to pages which don't exist\n" .
- "and 'childless' pages with no revisions\n" .
- "Then, kill the poor widows and orphans\n" .
- "Man this is depressing"
- );
- $this->addOption( 'fix', 'Actually fix broken entries' );
- }
- public function execute() {
- $this->checkOrphans( $this->hasOption( 'fix' ) );
- $this->checkSeparation( $this->hasOption( 'fix' ) );
- # Does not work yet, do not use
- # $this->checkWidows( $this->hasOption( 'fix' ) );
- }
- /**
- * Lock the appropriate tables for the script
- * @param IMaintainableDatabase $db
- * @param string[] $extraTable The name of any extra tables to lock (eg: text)
- */
- private function lockTables( $db, $extraTable = [] ) {
- $tbls = [ 'page', 'revision', 'redirect' ];
- if ( $extraTable ) {
- $tbls = array_merge( $tbls, $extraTable );
- }
- $db->lockTables( [], $tbls, __METHOD__, false );
- }
- /**
- * Check for orphan revisions
- * @param bool $fix Whether to fix broken revisions when found
- */
- private function checkOrphans( $fix ) {
- $dbw = $this->getDB( DB_MASTER );
- $commentStore = CommentStore::getStore();
- if ( $fix ) {
- $this->lockTables( $dbw );
- }
- $commentQuery = $commentStore->getJoin( 'rev_comment' );
- $actorQuery = ActorMigration::newMigration()->getJoin( 'rev_user' );
- $this->output( "Checking for orphan revision table entries... "
- . "(this may take a while on a large wiki)\n" );
- $result = $dbw->select(
- [ 'revision', 'page' ] + $commentQuery['tables'] + $actorQuery['tables'],
- [ 'rev_id', 'rev_page', 'rev_timestamp' ] + $commentQuery['fields'] + $actorQuery['fields'],
- [ 'page_id' => null ],
- __METHOD__,
- [],
- [ 'page' => [ 'LEFT JOIN', [ 'rev_page=page_id' ] ] ] + $commentQuery['joins']
- + $actorQuery['joins']
- );
- $orphans = $result->numRows();
- if ( $orphans > 0 ) {
- $this->output( "$orphans orphan revisions...\n" );
- $this->output( sprintf(
- "%10s %10s %14s %20s %s\n",
- 'rev_id', 'rev_page', 'rev_timestamp', 'rev_user_text', 'rev_comment'
- ) );
- $contLang = MediaWikiServices::getInstance()->getContentLanguage();
- foreach ( $result as $row ) {
- $comment = $commentStore->getComment( 'rev_comment', $row )->text;
- if ( $comment !== '' ) {
- $comment = '(' . $contLang->truncateForVisual( $comment, 40 ) . ')';
- }
- $rev_user_text = $contLang->truncateForVisual( $row->rev_user_text, 20 );
- # pad $rev_user_text to 20 characters. Note that this may
- # yield poor results if $rev_user_text contains combining
- # or half-width characters. Alas.
- if ( mb_strlen( $rev_user_text ) < 20 ) {
- $rev_user_text = str_repeat( ' ', 20 - mb_strlen( $rev_user_text ) );
- }
- $this->output( sprintf( "%10d %10d %14s %s %s\n",
- $row->rev_id,
- $row->rev_page,
- $row->rev_timestamp,
- $rev_user_text,
- $comment ) );
- if ( $fix ) {
- $dbw->delete( 'revision', [ 'rev_id' => $row->rev_id ] );
- }
- }
- if ( !$fix ) {
- $this->output( "Run again with --fix to remove these entries automatically.\n" );
- }
- } else {
- $this->output( "No orphans! Yay!\n" );
- }
- if ( $fix ) {
- $dbw->unlockTables( __METHOD__ );
- }
- }
- /**
- * @param bool $fix
- * @todo DON'T USE THIS YET! It will remove entries which have children,
- * but which aren't properly attached (eg if page_latest is bogus
- * but valid revisions do exist)
- */
- private function checkWidows( $fix ) {
- $dbw = $this->getDB( DB_MASTER );
- $page = $dbw->tableName( 'page' );
- $revision = $dbw->tableName( 'revision' );
- if ( $fix ) {
- $this->lockTables( $dbw );
- }
- $this->output( "\nChecking for childless page table entries... "
- . "(this may take a while on a large wiki)\n" );
- $result = $dbw->query( "
- SELECT *
- FROM $page LEFT OUTER JOIN $revision ON page_latest=rev_id
- WHERE rev_id IS NULL
- " );
- $widows = $result->numRows();
- if ( $widows > 0 ) {
- $this->output( "$widows childless pages...\n" );
- $this->output( sprintf( "%10s %11s %2s %s\n", 'page_id', 'page_latest', 'ns', 'page_title' ) );
- foreach ( $result as $row ) {
- printf( "%10d %11d %2d %s\n",
- $row->page_id,
- $row->page_latest,
- $row->page_namespace,
- $row->page_title );
- if ( $fix ) {
- $dbw->delete( 'page', [ 'page_id' => $row->page_id ] );
- }
- }
- if ( !$fix ) {
- $this->output( "Run again with --fix to remove these entries automatically.\n" );
- }
- } else {
- $this->output( "No childless pages! Yay!\n" );
- }
- if ( $fix ) {
- $dbw->unlockTables( __METHOD__ );
- }
- }
- /**
- * Check for pages where page_latest is wrong
- * @param bool $fix Whether to fix broken entries
- */
- private function checkSeparation( $fix ) {
- $dbw = $this->getDB( DB_MASTER );
- $page = $dbw->tableName( 'page' );
- $revision = $dbw->tableName( 'revision' );
- if ( $fix ) {
- $this->lockTables( $dbw, [ 'user', 'text' ] );
- }
- $this->output( "\nChecking for pages whose page_latest links are incorrect... "
- . "(this may take a while on a large wiki)\n" );
- $result = $dbw->query( "
- SELECT *
- FROM $page LEFT OUTER JOIN $revision ON page_latest=rev_id
- " );
- $found = 0;
- foreach ( $result as $row ) {
- $result2 = $dbw->query( "
- SELECT MAX(rev_timestamp) as max_timestamp
- FROM $revision
- WHERE rev_page=" . (int)( $row->page_id )
- );
- $row2 = $dbw->fetchObject( $result2 );
- if ( $row2 ) {
- if ( $row->rev_timestamp != $row2->max_timestamp ) {
- if ( $found == 0 ) {
- $this->output( sprintf( "%10s %10s %14s %14s\n",
- 'page_id', 'rev_id', 'timestamp', 'max timestamp' ) );
- }
- ++$found;
- $this->output( sprintf( "%10d %10d %14s %14s\n",
- $row->page_id,
- $row->page_latest,
- $row->rev_timestamp,
- $row2->max_timestamp ) );
- if ( $fix ) {
- # ...
- $maxId = $dbw->selectField(
- 'revision',
- 'rev_id',
- [
- 'rev_page' => $row->page_id,
- 'rev_timestamp' => $row2->max_timestamp ] );
- $this->output( "... updating to revision $maxId\n" );
- $maxRev = Revision::newFromId( $maxId );
- $title = Title::makeTitle( $row->page_namespace, $row->page_title );
- $article = WikiPage::factory( $title );
- $article->updateRevisionOn( $dbw, $maxRev );
- }
- }
- } else {
- $this->output( "wtf\n" );
- }
- }
- if ( $found ) {
- $this->output( "Found $found pages with incorrect latest revision.\n" );
- } else {
- $this->output( "No pages with incorrect latest revision. Yay!\n" );
- }
- if ( !$fix && $found > 0 ) {
- $this->output( "Run again with --fix to remove these entries automatically.\n" );
- }
- if ( $fix ) {
- $dbw->unlockTables( __METHOD__ );
- }
- }
- }
- $maintClass = Orphans::class;
- require_once RUN_MAINTENANCE_IF_MAIN;
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