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