includes/ServiceWiring.php

   1 <?php
   2 /**
   3  * Default wiring for MediaWiki services.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  *
  22  * This file is loaded by MediaWiki\MediaWikiServices::getInstance() during the
  23  * bootstrapping of the dependency injection framework.
  24  *
  25  * This file returns an array that associates service name with instantiator functions
  26  * that create the default instances for the services used by MediaWiki core.
  27  * For every service that MediaWiki core requires, an instantiator must be defined in
  28  * this file.
  29  *
  30  * @note As of version 1.27, MediaWiki is only beginning to use dependency injection.
  31  * The services defined here do not yet fully represent all services used by core,
  32  * much of the code still relies on global state for this accessing services.
  33  *
  34  * @since 1.27
  35  *
  36  * @see docs/injection.txt for an overview of using dependency injection in the
  37  *      MediaWiki code base.
  38  */
  39
  40 use MediaWiki\Auth\AuthManager;
  41 use MediaWiki\Interwiki\ClassicInterwikiLookup;
  42 use MediaWiki\Linker\LinkRendererFactory;
  43 use MediaWiki\Logger\LoggerFactory;
  44 use MediaWiki\MediaWikiServices;
  45 use MediaWiki\Preferences\DefaultPreferencesFactory;
  46 use MediaWiki\Shell\CommandFactory;
  47 use MediaWiki\Storage\BlobStoreFactory;
  48 use MediaWiki\Storage\NameTableStore;
  49 use MediaWiki\Storage\RevisionStore;
  50 use MediaWiki\Storage\SqlBlobStore;
  51 use Wikimedia\ObjectFactory;
  52
  53 return [
  54         'DBLoadBalancerFactory' => function ( MediaWikiServices $services ) {
  55                 $mainConfig = $services->getMainConfig();
  56
  57                 $lbConf = MWLBFactory::applyDefaultConfig(
  58                         $mainConfig->get( 'LBFactoryConf' ),
  59                         $mainConfig,
  60                         $services->getConfiguredReadOnlyMode()
  61                 );
  62                 $class = MWLBFactory::getLBFactoryClass( $lbConf );
  63
  64                 $instance = new $class( $lbConf );
  65                 MWLBFactory::setSchemaAliases( $instance );
  66
  67                 return $instance;
  68         },
  69
  70         'DBLoadBalancer' => function ( MediaWikiServices $services ) {
  71                 // just return the default LB from the DBLoadBalancerFactory service
  72                 return $services->getDBLoadBalancerFactory()->getMainLB();
  73         },
  74
  75         'SiteStore' => function ( MediaWikiServices $services ) {
  76                 $rawSiteStore = new DBSiteStore( $services->getDBLoadBalancer() );
  77
  78                 // TODO: replace wfGetCache with a CacheFactory service.
  79                 // TODO: replace wfIsHHVM with a capabilities service.
  80                 $cache = wfGetCache( wfIsHHVM() ? CACHE_ACCEL : CACHE_ANYTHING );
  81
  82                 return new CachingSiteStore( $rawSiteStore, $cache );
  83         },
  84
  85         'SiteLookup' => function ( MediaWikiServices $services ) {
  86                 $cacheFile = $services->getMainConfig()->get( 'SitesCacheFile' );
  87
  88                 if ( $cacheFile !== false ) {
  89                         return new FileBasedSiteLookup( $cacheFile );
  90                 } else {
  91                         // Use the default SiteStore as the SiteLookup implementation for now
  92                         return $services->getSiteStore();
  93                 }
  94         },
  95
  96         'ConfigFactory' => function ( MediaWikiServices $services ) {
  97                 // Use the bootstrap config to initialize the ConfigFactory.
  98                 $registry = $services->getBootstrapConfig()->get( 'ConfigRegistry' );
  99                 $factory = new ConfigFactory();
 100
 101                 foreach ( $registry as $name => $callback ) {
 102                         $factory->register( $name, $callback );
 103                 }
 104                 return $factory;
 105         },
 106
 107         'MainConfig' => function ( MediaWikiServices $services ) {
 108                 // Use the 'main' config from the ConfigFactory service.
 109                 return $services->getConfigFactory()->makeConfig( 'main' );
 110         },
 111
 112         'InterwikiLookup' => function ( MediaWikiServices $services ) {
 113                 global $wgContLang; // TODO: manage $wgContLang as a service
 114                 $config = $services->getMainConfig();
 115                 return new ClassicInterwikiLookup(
 116                         $wgContLang,
 117                         $services->getMainWANObjectCache(),
 118                         $config->get( 'InterwikiExpiry' ),
 119                         $config->get( 'InterwikiCache' ),
 120                         $config->get( 'InterwikiScopes' ),
 121                         $config->get( 'InterwikiFallbackSite' )
 122                 );
 123         },
 124
 125         'StatsdDataFactory' => function ( MediaWikiServices $services ) {
 126                 return new BufferingStatsdDataFactory(
 127                         rtrim( $services->getMainConfig()->get( 'StatsdMetricPrefix' ), '.' )
 128                 );
 129         },
 130
 131         'EventRelayerGroup' => function ( MediaWikiServices $services ) {
 132                 return new EventRelayerGroup( $services->getMainConfig()->get( 'EventRelayerConfig' ) );
 133         },
 134
 135         'SearchEngineFactory' => function ( MediaWikiServices $services ) {
 136                 return new SearchEngineFactory( $services->getSearchEngineConfig() );
 137         },
 138
 139         'SearchEngineConfig' => function ( MediaWikiServices $services ) {
 140                 global $wgContLang;
 141                 return new SearchEngineConfig( $services->getMainConfig(), $wgContLang );
 142         },
 143
 144         'SkinFactory' => function ( MediaWikiServices $services ) {
 145                 $factory = new SkinFactory();
 146
 147                 $names = $services->getMainConfig()->get( 'ValidSkinNames' );
 148
 149                 foreach ( $names as $name => $skin ) {
 150                         $factory->register( $name, $skin, function () use ( $name, $skin ) {
 151                                 $class = "Skin$skin";
 152                                 return new $class( $name );
 153                         } );
 154                 }
 155                 // Register a hidden "fallback" skin
 156                 $factory->register( 'fallback', 'Fallback', function () {
 157                         return new SkinFallback;
 158                 } );
 159                 // Register a hidden skin for api output
 160                 $factory->register( 'apioutput', 'ApiOutput', function () {
 161                         return new SkinApi;
 162                 } );
 163
 164                 return $factory;
 165         },
 166
 167         'WatchedItemStore' => function ( MediaWikiServices $services ) {
 168                 $store = new WatchedItemStore(
 169                         $services->getDBLoadBalancer(),
 170                         new HashBagOStuff( [ 'maxKeys' => 100 ] ),
 171                         $services->getReadOnlyMode(),
 172                         $services->getMainConfig()->get( 'UpdateRowsPerQuery' )
 173                 );
 174                 $store->setStatsdDataFactory( $services->getStatsdDataFactory() );
 175
 176                 if ( $services->getMainConfig()->get( 'ReadOnlyWatchedItemStore' ) ) {
 177                         $store = new NoWriteWatchedItemStore( $store );
 178                 }
 179
 180                 return $store;
 181         },
 182
 183         'WatchedItemQueryService' => function ( MediaWikiServices $services ) {
 184                 return new WatchedItemQueryService(
 185                         $services->getDBLoadBalancer(),
 186                         $services->getCommentStore(),
 187                         $services->getActorMigration()
 188                 );
 189         },
 190
 191         'CryptRand' => function ( MediaWikiServices $services ) {
 192                 $secretKey = $services->getMainConfig()->get( 'SecretKey' );
 193                 return new CryptRand(
 194                         [
 195                                 // To try vary the system information of the state a bit more
 196                                 // by including the system's hostname into the state
 197                                 'wfHostname',
 198                                 // It's mostly worthless but throw the wiki's id into the data
 199                                 // for a little more variance
 200                                 'wfWikiID',
 201                                 // If we have a secret key set then throw it into the state as well
 202                                 function () use ( $secretKey ) {
 203                                         return $secretKey ?: '';
 204                                 }
 205                         ],
 206                         // The config file is likely the most often edited file we know should
 207                         // be around so include its stat info into the state.
 208                         // The constant with its location will almost always be defined, as
 209                         // WebStart.php defines MW_CONFIG_FILE to $IP/LocalSettings.php unless
 210                         // being configured with MW_CONFIG_CALLBACK (e.g. the installer).
 211                         defined( 'MW_CONFIG_FILE' ) ? [ MW_CONFIG_FILE ] : [],
 212                         LoggerFactory::getInstance( 'CryptRand' )
 213                 );
 214         },
 215
 216         'CryptHKDF' => function ( MediaWikiServices $services ) {
 217                 $config = $services->getMainConfig();
 218
 219                 $secret = $config->get( 'HKDFSecret' ) ?: $config->get( 'SecretKey' );
 220                 if ( !$secret ) {
 221                         throw new RuntimeException( "Cannot use MWCryptHKDF without a secret." );
 222                 }
 223
 224                 // In HKDF, the context can be known to the attacker, but this will
 225                 // keep simultaneous runs from producing the same output.
 226                 $context = [ microtime(), getmypid(), gethostname() ];
 227
 228                 // Setup salt cache. Use APC, or fallback to the main cache if it isn't setup
 229                 $cache = $services->getLocalServerObjectCache();
 230                 if ( $cache instanceof EmptyBagOStuff ) {
 231                         $cache = ObjectCache::getLocalClusterInstance();
 232                 }
 233
 234                 return new CryptHKDF( $secret, $config->get( 'HKDFAlgorithm' ),
 235                         $cache, $context, $services->getCryptRand()
 236                 );
 237         },
 238
 239         'MediaHandlerFactory' => function ( MediaWikiServices $services ) {
 240                 return new MediaHandlerFactory(
 241                         $services->getMainConfig()->get( 'MediaHandlers' )
 242                 );
 243         },
 244
 245         'MimeAnalyzer' => function ( MediaWikiServices $services ) {
 246                 $logger = LoggerFactory::getInstance( 'Mime' );
 247                 $mainConfig = $services->getMainConfig();
 248                 $params = [
 249                         'typeFile' => $mainConfig->get( 'MimeTypeFile' ),
 250                         'infoFile' => $mainConfig->get( 'MimeInfoFile' ),
 251                         'xmlTypes' => $mainConfig->get( 'XMLMimeTypes' ),
 252                         'guessCallback' =>
 253                                 function ( $mimeAnalyzer, &$head, &$tail, $file, &$mime ) use ( $logger ) {
 254                                         // Also test DjVu
 255                                         $deja = new DjVuImage( $file );
 256                                         if ( $deja->isValid() ) {
 257                                                 $logger->info( __METHOD__ . ": detected $file as image/vnd.djvu\n" );
 258                                                 $mime = 'image/vnd.djvu';
 259
 260                                                 return;
 261                                         }
 262                                         // Some strings by reference for performance - assuming well-behaved hooks
 263                                         Hooks::run(
 264                                                 'MimeMagicGuessFromContent',
 265                                                 [ $mimeAnalyzer, &$head, &$tail, $file, &$mime ]
 266                                         );
 267                                 },
 268                         'extCallback' => function ( $mimeAnalyzer, $ext, &$mime ) {
 269                                 // Media handling extensions can improve the MIME detected
 270                                 Hooks::run( 'MimeMagicImproveFromExtension', [ $mimeAnalyzer, $ext, &$mime ] );
 271                         },
 272                         'initCallback' => function ( $mimeAnalyzer ) {
 273                                 // Allow media handling extensions adding MIME-types and MIME-info
 274                                 Hooks::run( 'MimeMagicInit', [ $mimeAnalyzer ] );
 275                         },
 276                         'logger' => $logger
 277                 ];
 278
 279                 if ( $params['infoFile'] === 'includes/mime.info' ) {
 280                         $params['infoFile'] = __DIR__ . "/libs/mime/mime.info";
 281                 }
 282
 283                 if ( $params['typeFile'] === 'includes/mime.types' ) {
 284                         $params['typeFile'] = __DIR__ . "/libs/mime/mime.types";
 285                 }
 286
 287                 $detectorCmd = $mainConfig->get( 'MimeDetectorCommand' );
 288                 if ( $detectorCmd ) {
 289                         $params['detectCallback'] = function ( $file ) use ( $detectorCmd ) {
 290                                 return wfShellExec( "$detectorCmd " . wfEscapeShellArg( $file ) );
 291                         };
 292                 }
 293
 294                 // XXX: MimeMagic::singleton currently requires this service to return an instance of MimeMagic
 295                 return new MimeMagic( $params );
 296         },
 297
 298         'ProxyLookup' => function ( MediaWikiServices $services ) {
 299                 $mainConfig = $services->getMainConfig();
 300                 return new ProxyLookup(
 301                         $mainConfig->get( 'SquidServers' ),
 302                         $mainConfig->get( 'SquidServersNoPurge' )
 303                 );
 304         },
 305
 306         'Parser' => function ( MediaWikiServices $services ) {
 307                 $conf = $services->getMainConfig()->get( 'ParserConf' );
 308                 return ObjectFactory::constructClassInstance( $conf['class'], [ $conf ] );
 309         },
 310
 311         'ParserCache' => function ( MediaWikiServices $services ) {
 312                 $config = $services->getMainConfig();
 313                 $cache = ObjectCache::getInstance( $config->get( 'ParserCacheType' ) );
 314                 wfDebugLog( 'caches', 'parser: ' . get_class( $cache ) );
 315
 316                 return new ParserCache(
 317                         $cache,
 318                         $config->get( 'CacheEpoch' )
 319                 );
 320         },
 321
 322         'LinkCache' => function ( MediaWikiServices $services ) {
 323                 return new LinkCache(
 324                         $services->getTitleFormatter(),
 325                         $services->getMainWANObjectCache()
 326                 );
 327         },
 328
 329         'LinkRendererFactory' => function ( MediaWikiServices $services ) {
 330                 return new LinkRendererFactory(
 331                         $services->getTitleFormatter(),
 332                         $services->getLinkCache()
 333                 );
 334         },
 335
 336         'LinkRenderer' => function ( MediaWikiServices $services ) {
 337                 global $wgUser;
 338
 339                 if ( defined( 'MW_NO_SESSION' ) ) {
 340                         return $services->getLinkRendererFactory()->create();
 341                 } else {
 342                         return $services->getLinkRendererFactory()->createForUser( $wgUser );
 343                 }
 344         },
 345
 346         'GenderCache' => function ( MediaWikiServices $services ) {
 347                 return new GenderCache();
 348         },
 349
 350         '_MediaWikiTitleCodec' => function ( MediaWikiServices $services ) {
 351                 global $wgContLang;
 352
 353                 return new MediaWikiTitleCodec(
 354                         $wgContLang,
 355                         $services->getGenderCache(),
 356                         $services->getMainConfig()->get( 'LocalInterwikis' )
 357                 );
 358         },
 359
 360         'TitleFormatter' => function ( MediaWikiServices $services ) {
 361                 return $services->getService( '_MediaWikiTitleCodec' );
 362         },
 363
 364         'TitleParser' => function ( MediaWikiServices $services ) {
 365                 return $services->getService( '_MediaWikiTitleCodec' );
 366         },
 367
 368         'MainObjectStash' => function ( MediaWikiServices $services ) {
 369                 $mainConfig = $services->getMainConfig();
 370
 371                 $id = $mainConfig->get( 'MainStash' );
 372                 if ( !isset( $mainConfig->get( 'ObjectCaches' )[$id] ) ) {
 373                         throw new UnexpectedValueException(
 374                                 "Cache type \"$id\" is not present in \$wgObjectCaches." );
 375                 }
 376
 377                 return \ObjectCache::newFromParams( $mainConfig->get( 'ObjectCaches' )[$id] );
 378         },
 379
 380         'MainWANObjectCache' => function ( MediaWikiServices $services ) {
 381                 $mainConfig = $services->getMainConfig();
 382
 383                 $id = $mainConfig->get( 'MainWANCache' );
 384                 if ( !isset( $mainConfig->get( 'WANObjectCaches' )[$id] ) ) {
 385                         throw new UnexpectedValueException(
 386                                 "WAN cache type \"$id\" is not present in \$wgWANObjectCaches." );
 387                 }
 388
 389                 $params = $mainConfig->get( 'WANObjectCaches' )[$id];
 390                 $objectCacheId = $params['cacheId'];
 391                 if ( !isset( $mainConfig->get( 'ObjectCaches' )[$objectCacheId] ) ) {
 392                         throw new UnexpectedValueException(
 393                                 "Cache type \"$objectCacheId\" is not present in \$wgObjectCaches." );
 394                 }
 395                 $params['store'] = $mainConfig->get( 'ObjectCaches' )[$objectCacheId];
 396
 397                 return \ObjectCache::newWANCacheFromParams( $params );
 398         },
 399
 400         'LocalServerObjectCache' => function ( MediaWikiServices $services ) {
 401                 $mainConfig = $services->getMainConfig();
 402
 403                 if ( function_exists( 'apc_fetch' ) ) {
 404                         $id = 'apc';
 405                 } elseif ( function_exists( 'apcu_fetch' ) ) {
 406                         $id = 'apcu';
 407                 } elseif ( function_exists( 'wincache_ucache_get' ) ) {
 408                         $id = 'wincache';
 409                 } else {
 410                         $id = CACHE_NONE;
 411                 }
 412
 413                 if ( !isset( $mainConfig->get( 'ObjectCaches' )[$id] ) ) {
 414                         throw new UnexpectedValueException(
 415                                 "Cache type \"$id\" is not present in \$wgObjectCaches." );
 416                 }
 417
 418                 return \ObjectCache::newFromParams( $mainConfig->get( 'ObjectCaches' )[$id] );
 419         },
 420
 421         'VirtualRESTServiceClient' => function ( MediaWikiServices $services ) {
 422                 $config = $services->getMainConfig()->get( 'VirtualRestConfig' );
 423
 424                 $vrsClient = new VirtualRESTServiceClient( new MultiHttpClient( [] ) );
 425                 foreach ( $config['paths'] as $prefix => $serviceConfig ) {
 426                         $class = $serviceConfig['class'];
 427                         // Merge in the global defaults
 428                         $constructArg = isset( $serviceConfig['options'] )
 429                                 ? $serviceConfig['options']
 430                                 : [];
 431                         $constructArg += $config['global'];
 432                         // Make the VRS service available at the mount point
 433                         $vrsClient->mount( $prefix, [ 'class' => $class, 'config' => $constructArg ] );
 434                 }
 435
 436                 return $vrsClient;
 437         },
 438
 439         'ConfiguredReadOnlyMode' => function ( MediaWikiServices $services ) {
 440                 return new ConfiguredReadOnlyMode( $services->getMainConfig() );
 441         },
 442
 443         'ReadOnlyMode' => function ( MediaWikiServices $services ) {
 444                 return new ReadOnlyMode(
 445                         $services->getConfiguredReadOnlyMode(),
 446                         $services->getDBLoadBalancer()
 447                 );
 448         },
 449
 450         'UploadRevisionImporter' => function ( MediaWikiServices $services ) {
 451                 return new ImportableUploadRevisionImporter(
 452                         $services->getMainConfig()->get( 'EnableUploads' ),
 453                         LoggerFactory::getInstance( 'UploadRevisionImporter' )
 454                 );
 455         },
 456
 457         'OldRevisionImporter' => function ( MediaWikiServices $services ) {
 458                 return new ImportableOldRevisionImporter(
 459                         true,
 460                         LoggerFactory::getInstance( 'OldRevisionImporter' ),
 461                         $services->getDBLoadBalancer()
 462                 );
 463         },
 464
 465         'WikiRevisionOldRevisionImporterNoUpdates' => function ( MediaWikiServices $services ) {
 466                 return new ImportableOldRevisionImporter(
 467                         false,
 468                         LoggerFactory::getInstance( 'OldRevisionImporter' ),
 469                         $services->getDBLoadBalancer()
 470                 );
 471         },
 472
 473         'ShellCommandFactory' => function ( MediaWikiServices $services ) {
 474                 $config = $services->getMainConfig();
 475
 476                 $limits = [
 477                         'time' => $config->get( 'MaxShellTime' ),
 478                         'walltime' => $config->get( 'MaxShellWallClockTime' ),
 479                         'memory' => $config->get( 'MaxShellMemory' ),
 480                         'filesize' => $config->get( 'MaxShellFileSize' ),
 481                 ];
 482                 $cgroup = $config->get( 'ShellCgroup' );
 483                 $restrictionMethod = $config->get( 'ShellRestrictionMethod' );
 484
 485                 $factory = new CommandFactory( $limits, $cgroup, $restrictionMethod );
 486                 $factory->setLogger( LoggerFactory::getInstance( 'exec' ) );
 487                 $factory->logStderr();
 488
 489                 return $factory;
 490         },
 491
 492         'ExternalStoreFactory' => function ( MediaWikiServices $services ) {
 493                 $config = $services->getMainConfig();
 494
 495                 return new ExternalStoreFactory(
 496                         $config->get( 'ExternalStores' )
 497                 );
 498         },
 499
 500         'RevisionStore' => function ( MediaWikiServices $services ) {
 501                 /** @var SqlBlobStore $blobStore */
 502                 $blobStore = $services->getService( '_SqlBlobStore' );
 503
 504                 $store = new RevisionStore(
 505                         $services->getDBLoadBalancer(),
 506                         $blobStore,
 507                         $services->getMainWANObjectCache(),
 508                         $services->getCommentStore(),
 509                         $services->getActorMigration()
 510                 );
 511
 512                 $store->setLogger( LoggerFactory::getInstance( 'RevisionStore' ) );
 513
 514                 $config = $services->getMainConfig();
 515                 $store->setContentHandlerUseDB( $config->get( 'ContentHandlerUseDB' ) );
 516
 517                 return $store;
 518         },
 519
 520         'RevisionLookup' => function ( MediaWikiServices $services ) {
 521                 return $services->getRevisionStore();
 522         },
 523
 524         'RevisionFactory' => function ( MediaWikiServices $services ) {
 525                 return $services->getRevisionStore();
 526         },
 527
 528         'BlobStoreFactory' => function ( MediaWikiServices $services ) {
 529                 global $wgContLang;
 530                 return new BlobStoreFactory(
 531                         $services->getDBLoadBalancer(),
 532                         $services->getMainWANObjectCache(),
 533                         $services->getMainConfig(),
 534                         $wgContLang
 535                 );
 536         },
 537
 538         'BlobStore' => function ( MediaWikiServices $services ) {
 539                 return $services->getService( '_SqlBlobStore' );
 540         },
 541
 542         '_SqlBlobStore' => function ( MediaWikiServices $services ) {
 543                 return $services->getBlobStoreFactory()->newSqlBlobStore();
 544         },
 545
 546         'ContentModelStore' => function ( MediaWikiServices $services ) {
 547                 return new NameTableStore(
 548                         $services->getDBLoadBalancer(),
 549                         $services->getMainWANObjectCache(),
 550                         LoggerFactory::getInstance( 'NameTableSqlStore' ),
 551                         'content_models',
 552                         'model_id',
 553                         'model_name'
 554                         /**
 555                          * No strtolower normalization is added to the service as there are examples of
 556                          * extensions that do not stick to this assumption.
 557                          * - extensions/examples/DataPages define( 'CONTENT_MODEL_XML_DATA','XML_DATA' );
 558                          * - extensions/Scribunto define( 'CONTENT_MODEL_SCRIBUNTO', 'Scribunto' );
 559                          */
 560                 );
 561         },
 562
 563         'SlotRoleStore' => function ( MediaWikiServices $services ) {
 564                 return new NameTableStore(
 565                         $services->getDBLoadBalancer(),
 566                         $services->getMainWANObjectCache(),
 567                         LoggerFactory::getInstance( 'NameTableSqlStore' ),
 568                         'slot_roles',
 569                         'role_id',
 570                         'role_name',
 571                         'strtolower'
 572                 );
 573         },
 574
 575         'PreferencesFactory' => function ( MediaWikiServices $services ) {
 576                 global $wgContLang;
 577                 $authManager = AuthManager::singleton();
 578                 $linkRenderer = $services->getLinkRendererFactory()->create();
 579                 $config = $services->getMainConfig();
 580                 return new DefaultPreferencesFactory( $config, $wgContLang, $authManager, $linkRenderer );
 581         },
 582
 583         'HttpRequestFactory' => function ( MediaWikiServices $services ) {
 584                 return new \MediaWiki\Http\HttpRequestFactory();
 585         },
 586
 587         'CommentStore' => function ( MediaWikiServices $services ) {
 588                 global $wgContLang;
 589                 return new CommentStore(
 590                         $wgContLang,
 591                         $services->getMainConfig()->get( 'CommentTableSchemaMigrationStage' )
 592                 );
 593         },
 594
 595         'ActorMigration' => function ( MediaWikiServices $services ) {
 596                 return new ActorMigration(
 597                         $services->getMainConfig()->get( 'ActorTableSchemaMigrationStage' )
 598                 );
 599         },
 600
 601         ///////////////////////////////////////////////////////////////////////////
 602         // NOTE: When adding a service here, don't forget to add a getter function
 603         // in the MediaWikiServices class. The convenience getter should just call
 604         // $this->getService( 'FooBarService' ).
 605         ///////////////////////////////////////////////////////////////////////////
 606
 607 ];