maintenance/namespaceDupes.php

   1 <?php
   2 /**
   3  * Check for articles to fix after adding/deleting namespaces
   4  *
   5  * Copyright © 2005-2007 Brion Vibber <brion@pobox.com>
   6  * https://www.mediawiki.org/
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  * @ingroup Maintenance
  25  */
  26
  27 require_once __DIR__ . '/Maintenance.php';
  28
  29 use MediaWiki\Linker\LinkTarget;
  30 use MediaWiki\MediaWikiServices;
  31 use Wikimedia\Rdbms\ResultWrapper;
  32 use Wikimedia\Rdbms\IMaintainableDatabase;
  33
  34 /**
  35  * Maintenance script that checks for articles to fix after
  36  * adding/deleting namespaces.
  37  *
  38  * @ingroup Maintenance
  39  */
  40 class NamespaceConflictChecker extends Maintenance {
  41
  42         /**
  43          * @var IMaintainableDatabase
  44          */
  45         protected $db;
  46
  47         private $resolvablePages = 0;
  48         private $totalPages = 0;
  49
  50         private $resolvableLinks = 0;
  51         private $totalLinks = 0;
  52
  53         public function __construct() {
  54                 parent::__construct();
  55                 $this->addDescription( 'Find and fix pages affected by namespace addition/removal' );
  56                 $this->addOption( 'fix', 'Attempt to automatically fix errors' );
  57                 $this->addOption( 'merge', "Instead of renaming conflicts, do a history merge with " .
  58                         "the correct title" );
  59                 $this->addOption( 'add-suffix', "Dupes will be renamed with correct namespace with " .
  60                         "<text> appended after the article name", false, true );
  61                 $this->addOption( 'add-prefix', "Dupes will be renamed with correct namespace with " .
  62                         "<text> prepended before the article name", false, true );
  63                 $this->addOption( 'source-pseudo-namespace', "Move all pages with the given source " .
  64                         "prefix (with an implied colon following it). If --dest-namespace is not specified, " .
  65                         "the colon will be replaced with a hyphen.",
  66                         false, true );
  67                 $this->addOption( 'dest-namespace', "In combination with --source-pseudo-namespace, " .
  68                         "specify the namespace ID of the destination.", false, true );
  69                 $this->addOption( 'move-talk', "If this is specified, pages in the Talk namespace that " .
  70                         "begin with a conflicting prefix will be renamed, for example " .
  71                         "Talk:File:Foo -> File_Talk:Foo" );
  72         }
  73
  74         public function execute() {
  75                 $this->db = $this->getDB( DB_MASTER );
  76
  77                 $options = [
  78                         'fix' => $this->hasOption( 'fix' ),
  79                         'merge' => $this->hasOption( 'merge' ),
  80                         'add-suffix' => $this->getOption( 'add-suffix', '' ),
  81                         'add-prefix' => $this->getOption( 'add-prefix', '' ),
  82                         'move-talk' => $this->hasOption( 'move-talk' ),
  83                         'source-pseudo-namespace' => $this->getOption( 'source-pseudo-namespace', '' ),
  84                         'dest-namespace' => intval( $this->getOption( 'dest-namespace', 0 ) ) ];
  85
  86                 if ( $options['source-pseudo-namespace'] !== '' ) {
  87                         $retval = $this->checkPrefix( $options );
  88                 } else {
  89                         $retval = $this->checkAll( $options );
  90                 }
  91
  92                 if ( $retval ) {
  93                         $this->output( "\nLooks good!\n" );
  94                 } else {
  95                         $this->output( "\nOh noeees\n" );
  96                 }
  97         }
  98
  99         /**
 100          * Check all namespaces
 101          *
 102          * @param array $options Associative array of validated command-line options
 103          *
 104          * @return bool
 105          */
 106         private function checkAll( $options ) {
 107                 global $wgContLang, $wgNamespaceAliases, $wgCapitalLinks;
 108
 109                 $spaces = [];
 110
 111                 // List interwikis first, so they'll be overridden
 112                 // by any conflicting local namespaces.
 113                 foreach ( $this->getInterwikiList() as $prefix ) {
 114                         $name = $wgContLang->ucfirst( $prefix );
 115                         $spaces[$name] = 0;
 116                 }
 117
 118                 // Now pull in all canonical and alias namespaces...
 119                 foreach ( MWNamespace::getCanonicalNamespaces() as $ns => $name ) {
 120                         // This includes $wgExtraNamespaces
 121                         if ( $name !== '' ) {
 122                                 $spaces[$name] = $ns;
 123                         }
 124                 }
 125                 foreach ( $wgContLang->getNamespaces() as $ns => $name ) {
 126                         if ( $name !== '' ) {
 127                                 $spaces[$name] = $ns;
 128                         }
 129                 }
 130                 foreach ( $wgNamespaceAliases as $name => $ns ) {
 131                         $spaces[$name] = $ns;
 132                 }
 133                 foreach ( $wgContLang->getNamespaceAliases() as $name => $ns ) {
 134                         $spaces[$name] = $ns;
 135                 }
 136
 137                 // We'll need to check for lowercase keys as well,
 138                 // since we're doing case-sensitive searches in the db.
 139                 foreach ( $spaces as $name => $ns ) {
 140                         $moreNames = [];
 141                         $moreNames[] = $wgContLang->uc( $name );
 142                         $moreNames[] = $wgContLang->ucfirst( $wgContLang->lc( $name ) );
 143                         $moreNames[] = $wgContLang->ucwords( $name );
 144                         $moreNames[] = $wgContLang->ucwords( $wgContLang->lc( $name ) );
 145                         $moreNames[] = $wgContLang->ucwordbreaks( $name );
 146                         $moreNames[] = $wgContLang->ucwordbreaks( $wgContLang->lc( $name ) );
 147                         if ( !$wgCapitalLinks ) {
 148                                 foreach ( $moreNames as $altName ) {
 149                                         $moreNames[] = $wgContLang->lcfirst( $altName );
 150                                 }
 151                                 $moreNames[] = $wgContLang->lcfirst( $name );
 152                         }
 153                         foreach ( array_unique( $moreNames ) as $altName ) {
 154                                 if ( $altName !== $name ) {
 155                                         $spaces[$altName] = $ns;
 156                                 }
 157                         }
 158                 }
 159
 160                 // Sort by namespace index, and if there are two with the same index,
 161                 // break the tie by sorting by name
 162                 $origSpaces = $spaces;
 163                 uksort( $spaces, function ( $a, $b ) use ( $origSpaces ) {
 164                         if ( $origSpaces[$a] < $origSpaces[$b] ) {
 165                                 return -1;
 166                         } elseif ( $origSpaces[$a] > $origSpaces[$b] ) {
 167                                 return 1;
 168                         } elseif ( $a < $b ) {
 169                                 return -1;
 170                         } elseif ( $a > $b ) {
 171                                 return 1;
 172                         } else {
 173                                 return 0;
 174                         }
 175                 } );
 176
 177                 $ok = true;
 178                 foreach ( $spaces as $name => $ns ) {
 179                         $ok = $this->checkNamespace( $ns, $name, $options ) && $ok;
 180                 }
 181
 182                 $this->output( "{$this->totalPages} pages to fix, " .
 183                         "{$this->resolvablePages} were resolvable.\n\n" );
 184
 185                 foreach ( $spaces as $name => $ns ) {
 186                         if ( $ns != 0 ) {
 187                                 /* Fix up link destinations for non-interwiki links only.
 188                                  *
 189                                  * For example if a page has [[Foo:Bar]] and then a Foo namespace
 190                                  * is introduced, pagelinks needs to be updated to have
 191                                  * page_namespace = NS_FOO.
 192                                  *
 193                                  * If instead an interwiki prefix was introduced called "Foo",
 194                                  * the link should instead be moved to the iwlinks table. If a new
 195                                  * language is introduced called "Foo", or if there is a pagelink
 196                                  * [[fr:Bar]] when interlanguage magic links are turned on, the
 197                                  * link would have to be moved to the langlinks table. Let's put
 198                                  * those cases in the too-hard basket for now. The consequences are
 199                                  * not especially severe.
 200                                  * @fixme Handle interwiki links, and pagelinks to Category:, File:
 201                                  * which probably need reparsing.
 202                                  */
 203
 204                                 $this->checkLinkTable( 'pagelinks', 'pl', $ns, $name, $options );
 205                                 $this->checkLinkTable( 'templatelinks', 'tl', $ns, $name, $options );
 206
 207                                 // The redirect table has interwiki links randomly mixed in, we
 208                                 // need to filter those out. For example [[w:Foo:Bar]] would
 209                                 // have rd_interwiki=w and rd_namespace=0, which would match the
 210                                 // query for a conflicting namespace "Foo" if filtering wasn't done.
 211                                 $this->checkLinkTable( 'redirect', 'rd', $ns, $name, $options,
 212                                         [ 'rd_interwiki' => null ] );
 213                                 $this->checkLinkTable( 'redirect', 'rd', $ns, $name, $options,
 214                                         [ 'rd_interwiki' => '' ] );
 215                         }
 216                 }
 217
 218                 $this->output( "{$this->totalLinks} links to fix, " .
 219                         "{$this->resolvableLinks} were resolvable.\n" );
 220
 221                 return $ok;
 222         }
 223
 224         /**
 225          * Get the interwiki list
 226          *
 227          * @return array
 228          */
 229         private function getInterwikiList() {
 230                 $result = MediaWikiServices::getInstance()->getInterwikiLookup()->getAllPrefixes();
 231                 $prefixes = [];
 232                 foreach ( $result as $row ) {
 233                         $prefixes[] = $row['iw_prefix'];
 234                 }
 235
 236                 return $prefixes;
 237         }
 238
 239         /**
 240          * Check a given prefix and try to move it into the given destination namespace
 241          *
 242          * @param int $ns Destination namespace id
 243          * @param string $name
 244          * @param array $options Associative array of validated command-line options
 245          * @return bool
 246          */
 247         private function checkNamespace( $ns, $name, $options ) {
 248                 $targets = $this->getTargetList( $ns, $name, $options );
 249                 $count = $targets->numRows();
 250                 $this->totalPages += $count;
 251                 if ( $count == 0 ) {
 252                         return true;
 253                 }
 254
 255                 $dryRunNote = $options['fix'] ? '' : ' DRY RUN ONLY';
 256
 257                 $ok = true;
 258                 foreach ( $targets as $row ) {
 259                         // Find the new title and determine the action to take
 260
 261                         $newTitle = $this->getDestinationTitle( $ns, $name,
 262                                 $row->page_namespace, $row->page_title, $options );
 263                         $logStatus = false;
 264                         if ( !$newTitle ) {
 265                                 $logStatus = 'invalid title';
 266                                 $action = 'abort';
 267                         } elseif ( $newTitle->exists() ) {
 268                                 if ( $options['merge'] ) {
 269                                         if ( $this->canMerge( $row->page_id, $newTitle, $logStatus ) ) {
 270                                                 $action = 'merge';
 271                                         } else {
 272                                                 $action = 'abort';
 273                                         }
 274                                 } elseif ( $options['add-prefix'] == '' && $options['add-suffix'] == '' ) {
 275                                         $action = 'abort';
 276                                         $logStatus = 'dest title exists and --add-prefix not specified';
 277                                 } else {
 278                                         $newTitle = $this->getAlternateTitle( $newTitle, $options );
 279                                         if ( !$newTitle ) {
 280                                                 $action = 'abort';
 281                                                 $logStatus = 'alternate title is invalid';
 282                                         } elseif ( $newTitle->exists() ) {
 283                                                 $action = 'abort';
 284                                                 $logStatus = 'title conflict';
 285                                         } else {
 286                                                 $action = 'move';
 287                                                 $logStatus = 'alternate';
 288                                         }
 289                                 }
 290                         } else {
 291                                 $action = 'move';
 292                                 $logStatus = 'no conflict';
 293                         }
 294
 295                         // Take the action or log a dry run message
 296
 297                         $logTitle = "id={$row->page_id} ns={$row->page_namespace} dbk={$row->page_title}";
 298                         $pageOK = true;
 299
 300                         switch ( $action ) {
 301                                 case 'abort':
 302                                         $this->output( "$logTitle *** $logStatus\n" );
 303                                         $pageOK = false;
 304                                         break;
 305                                 case 'move':
 306                                         $this->output( "$logTitle -> " .
 307                                                 $newTitle->getPrefixedDBkey() . " ($logStatus)$dryRunNote\n" );
 308
 309                                         if ( $options['fix'] ) {
 310                                                 $pageOK = $this->movePage( $row->page_id, $newTitle );
 311                                         }
 312                                         break;
 313                                 case 'merge':
 314                                         $this->output( "$logTitle => " .
 315                                                 $newTitle->getPrefixedDBkey() . " (merge)$dryRunNote\n" );
 316
 317                                         if ( $options['fix'] ) {
 318                                                 $pageOK = $this->mergePage( $row, $newTitle );
 319                                         }
 320                                         break;
 321                         }
 322
 323                         if ( $pageOK ) {
 324                                 $this->resolvablePages++;
 325                         } else {
 326                                 $ok = false;
 327                         }
 328                 }
 329
 330                 return $ok;
 331         }
 332
 333         /**
 334          * Check and repair the destination fields in a link table
 335          * @param string $table The link table name
 336          * @param string $fieldPrefix The field prefix in the link table
 337          * @param int $ns Destination namespace id
 338          * @param string $name
 339          * @param array $options Associative array of validated command-line options
 340          * @param array $extraConds Extra conditions for the SQL query
 341          */
 342         private function checkLinkTable( $table, $fieldPrefix, $ns, $name, $options,
 343                 $extraConds = []
 344         ) {
 345                 $batchConds = [];
 346                 $fromField = "{$fieldPrefix}_from";
 347                 $namespaceField = "{$fieldPrefix}_namespace";
 348                 $titleField = "{$fieldPrefix}_title";
 349                 $batchSize = 500;
 350                 while ( true ) {
 351                         $res = $this->db->select(
 352                                 $table,
 353                                 [ $fromField, $namespaceField, $titleField ],
 354                                 array_merge( $batchConds, $extraConds, [
 355                                         $namespaceField => 0,
 356                                         $titleField . $this->db->buildLike( "$name:", $this->db->anyString() )
 357                                 ] ),
 358                                 __METHOD__,
 359                                 [
 360                                         'ORDER BY' => [ $titleField, $fromField ],
 361                                         'LIMIT' => $batchSize
 362                                 ]
 363                         );
 364
 365                         if ( $res->numRows() == 0 ) {
 366                                 break;
 367                         }
 368                         foreach ( $res as $row ) {
 369                                 $logTitle = "from={$row->$fromField} ns={$row->$namespaceField} " .
 370                                         "dbk={$row->$titleField}";
 371                                 $destTitle = $this->getDestinationTitle( $ns, $name,
 372                                         $row->$namespaceField, $row->$titleField, $options );
 373                                 $this->totalLinks++;
 374                                 if ( !$destTitle ) {
 375                                         $this->output( "$table $logTitle *** INVALID\n" );
 376                                         continue;
 377                                 }
 378                                 $this->resolvableLinks++;
 379                                 if ( !$options['fix'] ) {
 380                                         $this->output( "$table $logTitle -> " .
 381                                                 $destTitle->getPrefixedDBkey() . " DRY RUN\n" );
 382                                         continue;
 383                                 }
 384
 385                                 $this->db->update( $table,
 386                                         // SET
 387                                         [
 388                                                 $namespaceField => $destTitle->getNamespace(),
 389                                                 $titleField => $destTitle->getDBkey()
 390                                         ],
 391                                         // WHERE
 392                                         [
 393                                                 $namespaceField => 0,
 394                                                 $titleField => $row->$titleField,
 395                                                 $fromField => $row->$fromField
 396                                         ],
 397                                         __METHOD__,
 398                                         [ 'IGNORE' ]
 399                                 );
 400                                 $this->output( "$table $logTitle -> " .
 401                                         $destTitle->getPrefixedDBkey() . "\n" );
 402                         }
 403                         $encLastTitle = $this->db->addQuotes( $row->$titleField );
 404                         $encLastFrom = $this->db->addQuotes( $row->$fromField );
 405
 406                         $batchConds = [
 407                                 "$titleField > $encLastTitle " .
 408                                 "OR ($titleField = $encLastTitle AND $fromField > $encLastFrom)" ];
 409
 410                         wfWaitForSlaves();
 411                 }
 412         }
 413
 414         /**
 415          * Move the given pseudo-namespace, either replacing the colon with a hyphen
 416          * (useful for pseudo-namespaces that conflict with interwiki links) or move
 417          * them to another namespace if specified.
 418          * @param array $options Associative array of validated command-line options
 419          * @return bool
 420          */
 421         private function checkPrefix( $options ) {
 422                 $prefix = $options['source-pseudo-namespace'];
 423                 $ns = $options['dest-namespace'];
 424                 $this->output( "Checking prefix \"$prefix\" vs namespace $ns\n" );
 425
 426                 return $this->checkNamespace( $ns, $prefix, $options );
 427         }
 428
 429         /**
 430          * Find pages in main and talk namespaces that have a prefix of the new
 431          * namespace so we know titles that will need migrating
 432          *
 433          * @param int $ns Destination namespace id
 434          * @param string $name Prefix that is being made a namespace
 435          * @param array $options Associative array of validated command-line options
 436          *
 437          * @return ResultWrapper
 438          */
 439         private function getTargetList( $ns, $name, $options ) {
 440                 if ( $options['move-talk'] && MWNamespace::isSubject( $ns ) ) {
 441                         $checkNamespaces = [ NS_MAIN, NS_TALK ];
 442                 } else {
 443                         $checkNamespaces = NS_MAIN;
 444                 }
 445
 446                 return $this->db->select( 'page',
 447                         [
 448                                 'page_id',
 449                                 'page_title',
 450                                 'page_namespace',
 451                         ],
 452                         [
 453                                 'page_namespace' => $checkNamespaces,
 454                                 'page_title' . $this->db->buildLike( "$name:", $this->db->anyString() ),
 455                         ],
 456                         __METHOD__
 457                 );
 458         }
 459
 460         /**
 461          * Get the preferred destination title for a given target page.
 462          * @param int $ns The destination namespace ID
 463          * @param string $name The conflicting prefix
 464          * @param int $sourceNs The source namespace
 465          * @param int $sourceDbk The source DB key (i.e. page_title)
 466          * @param array $options Associative array of validated command-line options
 467          * @return Title|false
 468          */
 469         private function getDestinationTitle( $ns, $name, $sourceNs, $sourceDbk, $options ) {
 470                 $dbk = substr( $sourceDbk, strlen( "$name:" ) );
 471                 if ( $ns == 0 ) {
 472                         // An interwiki; try an alternate encoding with '-' for ':'
 473                         $dbk = "$name-" . $dbk;
 474                 }
 475                 $destNS = $ns;
 476                 if ( $sourceNs == NS_TALK && MWNamespace::isSubject( $ns ) ) {
 477                         // This is an associated talk page moved with the --move-talk feature.
 478                         $destNS = MWNamespace::getTalk( $destNS );
 479                 }
 480                 $newTitle = Title::makeTitleSafe( $destNS, $dbk );
 481                 if ( !$newTitle || !$newTitle->canExist() ) {
 482                         return false;
 483                 }
 484                 return $newTitle;
 485         }
 486
 487         /**
 488          * Get an alternative title to move a page to. This is used if the
 489          * preferred destination title already exists.
 490          *
 491          * @param LinkTarget $linkTarget
 492          * @param array $options Associative array of validated command-line options
 493          * @return Title|bool
 494          */
 495         private function getAlternateTitle( LinkTarget $linkTarget, $options ) {
 496                 $prefix = $options['add-prefix'];
 497                 $suffix = $options['add-suffix'];
 498                 if ( $prefix == '' && $suffix == '' ) {
 499                         return false;
 500                 }
 501                 while ( true ) {
 502                         $dbk = $prefix . $linkTarget->getDBkey() . $suffix;
 503                         $title = Title::makeTitleSafe( $linkTarget->getNamespace(), $dbk );
 504                         if ( !$title ) {
 505                                 return false;
 506                         }
 507                         if ( !$title->exists() ) {
 508                                 return $title;
 509                         }
 510                 }
 511         }
 512
 513         /**
 514          * Move a page
 515          *
 516          * @param integer $id The page_id
 517          * @param LinkTarget $newLinkTarget The new title link target
 518          * @return bool
 519          */
 520         private function movePage( $id, LinkTarget $newLinkTarget ) {
 521                 $this->db->update( 'page',
 522                         [
 523                                 "page_namespace" => $newLinkTarget->getNamespace(),
 524                                 "page_title" => $newLinkTarget->getDBkey(),
 525                         ],
 526                         [
 527                                 "page_id" => $id,
 528                         ],
 529                         __METHOD__ );
 530
 531                 // Update *_from_namespace in links tables
 532                 $fromNamespaceTables = [
 533                         [ 'pagelinks', 'pl' ],
 534                         [ 'templatelinks', 'tl' ],
 535                         [ 'imagelinks', 'il' ] ];
 536                 foreach ( $fromNamespaceTables as $tableInfo ) {
 537                         list( $table, $fieldPrefix ) = $tableInfo;
 538                         $this->db->update( $table,
 539                                 // SET
 540                                 [ "{$fieldPrefix}_from_namespace" => $newLinkTarget->getNamespace() ],
 541                                 // WHERE
 542                                 [ "{$fieldPrefix}_from" => $id ],
 543                                 __METHOD__ );
 544                 }
 545
 546                 return true;
 547         }
 548
 549         /**
 550          * Determine if we can merge a page.
 551          * We check if an inaccessible revision would become the latest and
 552          * deny the merge if so -- it's theoretically possible to update the
 553          * latest revision, but opens a can of worms -- search engine updates,
 554          * recentchanges review, etc.
 555          *
 556          * @param integer $id The page_id
 557          * @param LinkTarget $linkTarget The new link target
 558          * @param string $logStatus This is set to the log status message on failure
 559          * @return bool
 560          */
 561         private function canMerge( $id, LinkTarget $linkTarget, &$logStatus ) {
 562                 $latestDest = Revision::newFromTitle( $linkTarget, 0, Revision::READ_LATEST );
 563                 $latestSource = Revision::newFromPageId( $id, 0, Revision::READ_LATEST );
 564                 if ( $latestSource->getTimestamp() > $latestDest->getTimestamp() ) {
 565                         $logStatus = 'cannot merge since source is later';
 566                         return false;
 567                 } else {
 568                         return true;
 569                 }
 570         }
 571
 572         /**
 573          * Merge page histories
 574          *
 575          * @param stdClass $row Page row
 576          * @param Title $newTitle The new title
 577          * @return bool
 578          */
 579         private function mergePage( $row, Title $newTitle ) {
 580                 $id = $row->page_id;
 581
 582                 // Construct the WikiPage object we will need later, while the
 583                 // page_id still exists. Note that this cannot use makeTitleSafe(),
 584                 // we are deliberately constructing an invalid title.
 585                 $sourceTitle = Title::makeTitle( $row->page_namespace, $row->page_title );
 586                 $sourceTitle->resetArticleID( $id );
 587                 $wikiPage = new WikiPage( $sourceTitle );
 588                 $wikiPage->loadPageData( 'fromdbmaster' );
 589
 590                 $destId = $newTitle->getArticleID();
 591                 $this->beginTransaction( $this->db, __METHOD__ );
 592                 $this->db->update( 'revision',
 593                         // SET
 594                         [ 'rev_page' => $destId ],
 595                         // WHERE
 596                         [ 'rev_page' => $id ],
 597                         __METHOD__ );
 598
 599                 $this->db->delete( 'page', [ 'page_id' => $id ], __METHOD__ );
 600
 601                 $this->commitTransaction( $this->db, __METHOD__ );
 602
 603                 /* Call LinksDeletionUpdate to delete outgoing links from the old title,
 604                  * and update category counts.
 605                  *
 606                  * Calling external code with a fake broken Title is a fairly dubious
 607                  * idea. It's necessary because it's quite a lot of code to duplicate,
 608                  * but that also makes it fragile since it would be easy for someone to
 609                  * accidentally introduce an assumption of title validity to the code we
 610                  * are calling.
 611                  */
 612                 DeferredUpdates::addUpdate( new LinksDeletionUpdate( $wikiPage ) );
 613                 DeferredUpdates::doUpdates();
 614
 615                 return true;
 616         }
 617 }
 618
 619 $maintClass = "NamespaceConflictChecker";
 620 require_once RUN_MAINTENANCE_IF_MAIN;