includes/installer/DatabaseUpdater.php

   1 <?php
   2 /**
   3  * DBMS-specific updater helper.
   4  *
   5  * @file
   6  * @ingroup Deployment
   7  */
   8
   9 require_once( dirname(__FILE__) . '/../../maintenance/Maintenance.php' );
  10
  11 /**
  12  * Class for handling database updates. Roughly based off of updaters.inc, with
  13  * a few improvements :)
  14  *
  15  * @ingroup Deployment
  16  * @since 1.17
  17  */
  18 abstract class DatabaseUpdater {
  19
  20         /**
  21          * Array of updates to perform on the database
  22          *
  23          * @var array
  24          */
  25         protected $updates = array();
  26
  27         /**
  28          * List of extension-provided database updates
  29          * @var array
  30          */
  31         protected $extensionUpdates = array();
  32
  33         /**
  34          * Handle to the database subclass
  35          *
  36          * @var DatabaseBase
  37          */
  38         protected $db;
  39
  40         protected $shared = false;
  41
  42         protected $postDatabaseUpdateMaintenance = array(
  43                 'DeleteDefaultMessages',
  44                 'PopulateRevisionLength',
  45                 'PopulateRevisionSha1',
  46                 'PopulateImageSha1',
  47                 'FixExtLinksProtocolRelative',
  48         );
  49
  50         /**
  51          * Constructor
  52          *
  53          * @param $db DatabaseBase object to perform updates on
  54          * @param $shared bool Whether to perform updates on shared tables
  55          * @param $maintenance Maintenance Maintenance object which created us
  56          */
  57         protected function __construct( DatabaseBase &$db, $shared, Maintenance $maintenance = null ) {
  58                 $this->db = $db;
  59                 $this->db->setFlag( DBO_DDLMODE ); // For Oracle's handling of schema files
  60                 $this->shared = $shared;
  61                 if ( $maintenance ) {
  62                         $this->maintenance = $maintenance;
  63                 } else {
  64                         $this->maintenance = new FakeMaintenance;
  65                 }
  66                 $this->maintenance->setDB( $db );
  67                 $this->initOldGlobals();
  68                 $this->loadExtensions();
  69                 wfRunHooks( 'LoadExtensionSchemaUpdates', array( $this ) );
  70         }
  71
  72         /**
  73          * Initialize all of the old globals. One day this should all become
  74          * something much nicer
  75          */
  76         private function initOldGlobals() {
  77                 global $wgExtNewTables, $wgExtNewFields, $wgExtPGNewFields,
  78                         $wgExtPGAlteredFields, $wgExtNewIndexes, $wgExtModifiedFields;
  79
  80                 # For extensions only, should be populated via hooks
  81                 # $wgDBtype should be checked to specifiy the proper file
  82                 $wgExtNewTables = array(); // table, dir
  83                 $wgExtNewFields = array(); // table, column, dir
  84                 $wgExtPGNewFields = array(); // table, column, column attributes; for PostgreSQL
  85                 $wgExtPGAlteredFields = array(); // table, column, new type, conversion method; for PostgreSQL
  86                 $wgExtNewIndexes = array(); // table, index, dir
  87                 $wgExtModifiedFields = array(); // table, index, dir
  88         }
  89
  90         /**
  91          * Loads LocalSettings.php, if needed, and initialises everything needed for LoadExtensionSchemaUpdates hook
  92          */
  93         private function loadExtensions() {
  94                 if ( !defined( 'MEDIAWIKI_INSTALL' ) ) {
  95                         return; // already loaded
  96                 }
  97                 $vars = Installer::getExistingLocalSettings();
  98                 if ( !$vars ) {
  99                         return; // no LocalSettings found
 100                 }
 101                 if ( !isset( $vars['wgHooks'] ) || !isset( $vars['wgHooks']['LoadExtensionSchemaUpdates'] ) ) {
 102                         return;
 103                 }
 104                 global $wgHooks, $wgAutoloadClasses;
 105                 $wgHooks['LoadExtensionSchemaUpdates'] = $vars['wgHooks']['LoadExtensionSchemaUpdates'];
 106                 $wgAutoloadClasses = $wgAutoloadClasses + $vars['wgAutoloadClasses'];
 107         }
 108
 109         /**
 110          * @throws MWException
 111          * @param DatabaseBase $db
 112          * @param bool $shared
 113          * @param null $maintenance
 114          * @return DatabaseUpdater
 115          */
 116         public static function newForDB( &$db, $shared = false, $maintenance = null ) {
 117                 $type = $db->getType();
 118                 if( in_array( $type, Installer::getDBTypes() ) ) {
 119                         $class = ucfirst( $type ) . 'Updater';
 120                         return new $class( $db, $shared, $maintenance );
 121                 } else {
 122                         throw new MWException( __METHOD__ . ' called for unsupported $wgDBtype' );
 123                 }
 124         }
 125
 126         /**
 127          * Get a database connection to run updates
 128          *
 129          * @return DatabaseBase
 130          */
 131         public function getDB() {
 132                 return $this->db;
 133         }
 134
 135         /**
 136          * Output some text. If we're running from web, escape the text first.
 137          *
 138          * @param $str String: Text to output
 139          */
 140         public function output( $str ) {
 141                 if ( $this->maintenance->isQuiet() ) {
 142                         return;
 143                 }
 144                 global $wgCommandLineMode;
 145                 if( !$wgCommandLineMode ) {
 146                         $str = htmlspecialchars( $str );
 147                 }
 148                 echo $str;
 149                 flush();
 150         }
 151
 152         /**
 153          * Add a new update coming from an extension. This should be called by
 154          * extensions while executing the LoadExtensionSchemaUpdates hook.
 155          *
 156          * @since 1.17
 157          *
 158          * @param $update Array: the update to run. Format is the following:
 159          *                first item is the callback function, it also can be a
 160          *                simple string with the name of a function in this class,
 161          *                following elements are parameters to the function.
 162          *                Note that callback functions will receive this object as
 163          *                first parameter.
 164          */
 165         public function addExtensionUpdate( Array $update ) {
 166                 $this->extensionUpdates[] = $update;
 167         }
 168
 169         /**
 170          * Convenience wrapper for addExtensionUpdate() when adding a new table (which
 171          * is the most common usage of updaters in an extension)
 172          *
 173          * @since 1.18
 174          *
 175          * @param $tableName String Name of table to create
 176          * @param $sqlPath String Full path to the schema file
 177          */
 178         public function addExtensionTable( $tableName, $sqlPath ) {
 179                 $this->extensionUpdates[] = array( 'addTable', $tableName, $sqlPath, true );
 180         }
 181
 182         /**
 183          * @since 1.19
 184          *
 185          * @param $tableName string
 186          * @param $indexName string
 187          * @param $sqlPath string
 188          */
 189         public function addExtensionIndex( $tableName, $indexName, $sqlPath ) {
 190                 $this->extensionUpdates[] = array( 'addIndex', $tableName, $indexName, $sqlPath, true );
 191         }
 192
 193         /**
 194          *
 195          * @since 1.19
 196          *
 197          * @param $tableName string
 198          * @param $columnName string
 199          * @param $sqlPath string
 200          */
 201         public function addExtensionField( $tableName, $columnName, $sqlPath ) {
 202                 $this->extensionUpdates[] = array( 'addField', $tableName, $columnName, $sqlPath, true );
 203         }
 204
 205         /**
 206          * Add a maintenance script to be run after the database updates are complete.
 207          *
 208          * @since 1.19
 209          *
 210          * @param $class string Name of a Maintenance subclass
 211          */
 212         public function addPostDatabaseUpdateMaintenance( $class ) {
 213                 $this->postDatabaseUpdateMaintenance[] = $class;
 214         }
 215
 216         /**
 217          * Get the list of extension-defined updates
 218          *
 219          * @return Array
 220          */
 221         protected function getExtensionUpdates() {
 222                 return $this->extensionUpdates;
 223         }
 224
 225         /**
 226          * @since 1.17
 227          *
 228          * @return array
 229          */
 230         public function getPostDatabaseUpdateMaintenance() {
 231                 return $this->postDatabaseUpdateMaintenance;
 232         }
 233
 234         /**
 235          * Do all the updates
 236          *
 237          * @param $what Array: what updates to perform
 238          */
 239         public function doUpdates( $what = array( 'core', 'extensions', 'purge', 'stats' ) ) {
 240                 global $wgLocalisationCacheConf, $wgVersion;
 241
 242                 $what = array_flip( $what );
 243                 if ( isset( $what['core'] ) ) {
 244                         $this->runUpdates( $this->getCoreUpdateList(), false );
 245                 }
 246                 if ( isset( $what['extensions'] ) ) {
 247                         $this->runUpdates( $this->getOldGlobalUpdates(), false );
 248                         $this->runUpdates( $this->getExtensionUpdates(), true );
 249                 }
 250
 251                 $this->setAppliedUpdates( $wgVersion, $this->updates );
 252
 253                 if ( isset( $what['stats'] ) ) {
 254                         $this->checkStats();
 255                 }
 256
 257                 if ( isset( $what['purge'] ) ) {
 258                         $this->purgeCache();
 259
 260                         if ( $wgLocalisationCacheConf['manualRecache'] ) {
 261                                 $this->rebuildLocalisationCache();
 262                         }
 263                 }
 264         }
 265
 266         /**
 267          * Helper function for doUpdates()
 268          *
 269          * @param $updates Array of updates to run
 270          * @param $passSelf Boolean: whether to pass this object we calling external
 271          *                  functions
 272          */
 273         private function runUpdates( array $updates, $passSelf ) {
 274                 foreach ( $updates as $params ) {
 275                         $func = array_shift( $params );
 276                         if( !is_array( $func ) && method_exists( $this, $func ) ) {
 277                                 $func = array( $this, $func );
 278                         } elseif ( $passSelf ) {
 279                                 array_unshift( $params, $this );
 280                         }
 281                         call_user_func_array( $func, $params );
 282                         flush();
 283                 }
 284                 $this->updates = array_merge( $this->updates, $updates );
 285         }
 286
 287         /**
 288          * @param $version
 289          * @param $updates array
 290          */
 291         protected function setAppliedUpdates( $version, $updates = array() ) {
 292                 $this->db->clearFlag( DBO_DDLMODE );
 293                 if( !$this->canUseNewUpdatelog() ) {
 294                         return;
 295                 }
 296                 $key = "updatelist-$version-" . time();
 297                 $this->db->insert( 'updatelog',
 298                         array( 'ul_key' => $key, 'ul_value' => serialize( $updates ) ),
 299                          __METHOD__ );
 300                 $this->db->setFlag( DBO_DDLMODE );
 301         }
 302
 303         /**
 304          * Helper function: check if the given key is present in the updatelog table.
 305          * Obviously, only use this for updates that occur after the updatelog table was
 306          * created!
 307          * @param $key String Name of the key to check for
 308          *
 309          * @return bool
 310          */
 311         public function updateRowExists( $key ) {
 312                 $row = $this->db->selectRow(
 313                         'updatelog',
 314                         '1',
 315                         array( 'ul_key' => $key ),
 316                         __METHOD__
 317                 );
 318                 return (bool)$row;
 319         }
 320
 321         /**
 322          * Helper function: Add a key to the updatelog table
 323          * Obviously, only use this for updates that occur after the updatelog table was
 324          * created!
 325          * @param $key String Name of key to insert
 326          * @param $val String [optional] value to insert along with the key
 327          */
 328         public function insertUpdateRow( $key, $val = null ) {
 329                 $this->db->clearFlag( DBO_DDLMODE );
 330                 $values = array( 'ul_key' => $key );
 331                 if( $val && $this->canUseNewUpdatelog() ) {
 332                         $values['ul_value'] = $val;
 333                 }
 334                 $this->db->insert( 'updatelog', $values, __METHOD__, 'IGNORE' );
 335                 $this->db->setFlag( DBO_DDLMODE );
 336         }
 337
 338         /**
 339          * Updatelog was changed in 1.17 to have a ul_value column so we can record
 340          * more information about what kind of updates we've done (that's what this
 341          * class does). Pre-1.17 wikis won't have this column, and really old wikis
 342          * might not even have updatelog at all
 343          *
 344          * @return boolean
 345          */
 346         protected function canUseNewUpdatelog() {
 347                 return $this->db->tableExists( 'updatelog', __METHOD__ ) &&
 348                         $this->db->fieldExists( 'updatelog', 'ul_value', __METHOD__ );
 349         }
 350
 351         /**
 352          * Before 1.17, we used to handle updates via stuff like
 353          * $wgExtNewTables/Fields/Indexes. This is nasty :) We refactored a lot
 354          * of this in 1.17 but we want to remain back-compatible for a while. So
 355          * load up these old global-based things into our update list.
 356          *
 357          * @return array
 358          */
 359         protected function getOldGlobalUpdates() {
 360                 global $wgExtNewFields, $wgExtNewTables, $wgExtModifiedFields,
 361                         $wgExtNewIndexes, $wgSharedDB, $wgSharedTables;
 362
 363                 $doUser = $this->shared ?
 364                         $wgSharedDB && in_array( 'user', $wgSharedTables ) :
 365                         !$wgSharedDB || !in_array( 'user', $wgSharedTables );
 366
 367                 $updates = array();
 368
 369                 foreach ( $wgExtNewTables as $tableRecord ) {
 370                         $updates[] = array(
 371                                 'addTable', $tableRecord[0], $tableRecord[1], true
 372                         );
 373                 }
 374
 375                 foreach ( $wgExtNewFields as $fieldRecord ) {
 376                         if ( $fieldRecord[0] != 'user' || $doUser ) {
 377                                 $updates[] = array(
 378                                         'addField', $fieldRecord[0], $fieldRecord[1],
 379                                                 $fieldRecord[2], true
 380                                 );
 381                         }
 382                 }
 383
 384                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 385                         $updates[] = array(
 386                                 'addIndex', $fieldRecord[0], $fieldRecord[1],
 387                                         $fieldRecord[2], true
 388                         );
 389                 }
 390
 391                 foreach ( $wgExtModifiedFields as $fieldRecord ) {
 392                         $updates[] = array(
 393                                 'modifyField', $fieldRecord[0], $fieldRecord[1],
 394                                         $fieldRecord[2], true
 395                         );
 396                 }
 397
 398                 return $updates;
 399         }
 400
 401         /**
 402          * Get an array of updates to perform on the database. Should return a
 403          * multi-dimensional array. The main key is the MediaWiki version (1.12,
 404          * 1.13...) with the values being arrays of updates, identical to how
 405          * updaters.inc did it (for now)
 406          *
 407          * @return Array
 408          */
 409         protected abstract function getCoreUpdateList();
 410
 411         /**
 412          * Applies a SQL patch
 413          * @param $path String Path to the patch file
 414          * @param $isFullPath Boolean Whether to treat $path as a relative or not
 415          */
 416         protected function applyPatch( $path, $isFullPath = false ) {
 417                 if ( $isFullPath ) {
 418                         $this->db->sourceFile( $path );
 419                 } else {
 420                         $this->db->sourceFile( $this->db->patchPath( $path ) );
 421                 }
 422         }
 423
 424         /**
 425          * Add a new table to the database
 426          * @param $name String Name of the new table
 427          * @param $patch String Path to the patch file
 428          * @param $fullpath Boolean Whether to treat $patch path as a relative or not
 429          */
 430         protected function addTable( $name, $patch, $fullpath = false ) {
 431                 if ( $this->db->tableExists( $name, __METHOD__ ) ) {
 432                         $this->output( "...$name table already exists.\n" );
 433                 } else {
 434                         $this->output( "Creating $name table..." );
 435                         $this->applyPatch( $patch, $fullpath );
 436                         $this->output( "done.\n" );
 437                 }
 438         }
 439
 440         /**
 441          * Add a new field to an existing table
 442          * @param $table String Name of the table to modify
 443          * @param $field String Name of the new field
 444          * @param $patch String Path to the patch file
 445          * @param $fullpath Boolean Whether to treat $patch path as a relative or not
 446          */
 447         protected function addField( $table, $field, $patch, $fullpath = false ) {
 448                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 449                         $this->output( "...$table table does not exist, skipping new field patch.\n" );
 450                 } elseif ( $this->db->fieldExists( $table, $field, __METHOD__ ) ) {
 451                         $this->output( "...have $field field in $table table.\n" );
 452                 } else {
 453                         $this->output( "Adding $field field to table $table..." );
 454                         $this->applyPatch( $patch, $fullpath );
 455                         $this->output( "done.\n" );
 456                 }
 457         }
 458
 459         /**
 460          * Add a new index to an existing table
 461          * @param $table String Name of the table to modify
 462          * @param $index String Name of the new index
 463          * @param $patch String Path to the patch file
 464          * @param $fullpath Boolean Whether to treat $patch path as a relative or not
 465          */
 466         protected function addIndex( $table, $index, $patch, $fullpath = false ) {
 467                 if ( $this->db->indexExists( $table, $index, __METHOD__ ) ) {
 468                         $this->output( "...index $index already set on $table table.\n" );
 469                 } else {
 470                         $this->output( "Adding index $index to table $table... " );
 471                         $this->applyPatch( $patch, $fullpath );
 472                         $this->output( "done.\n" );
 473                 }
 474         }
 475
 476         /**
 477          * Drop a field from an existing table
 478          *
 479          * @param $table String Name of the table to modify
 480          * @param $field String Name of the old field
 481          * @param $patch String Path to the patch file
 482          * @param $fullpath Boolean Whether to treat $patch path as a relative or not
 483          */
 484         protected function dropField( $table, $field, $patch, $fullpath = false ) {
 485                 if ( $this->db->fieldExists( $table, $field, __METHOD__ ) ) {
 486                         $this->output( "Table $table contains $field field. Dropping... " );
 487                         $this->applyPatch( $patch, $fullpath );
 488                         $this->output( "done.\n" );
 489                 } else {
 490                         $this->output( "...$table table does not contain $field field.\n" );
 491                 }
 492         }
 493
 494         /**
 495          * Drop an index from an existing table
 496          *
 497          * @param $table String: Name of the table to modify
 498          * @param $index String: Name of the old index
 499          * @param $patch String: Path to the patch file
 500          * @param $fullpath Boolean: Whether to treat $patch path as a relative or not
 501          */
 502         protected function dropIndex( $table, $index, $patch, $fullpath = false ) {
 503                 if ( $this->db->indexExists( $table, $index, __METHOD__ ) ) {
 504                         $this->output( "Dropping $index index from table $table... " );
 505                         $this->applyPatch( $patch, $fullpath );
 506                         $this->output( "done.\n" );
 507                 } else {
 508                         $this->output( "...$index key doesn't exist.\n" );
 509                 }
 510         }
 511
 512         /**
 513          * @param $table string
 514          * @param $patch string
 515          * @param $fullpath bool
 516          */
 517         protected function dropTable( $table, $patch, $fullpath = false ) {
 518                 if ( $this->db->tableExists( $table, __METHOD__ ) ) {
 519                         $this->output( "Dropping table $table... " );
 520                         $this->applyPatch( $patch, $fullpath );
 521                         $this->output( "done.\n" );
 522                 } else {
 523                         $this->output( "...$table doesn't exist.\n" );
 524                 }
 525         }
 526
 527         /**
 528          * Modify an existing field
 529          *
 530          * @param $table String: name of the table to which the field belongs
 531          * @param $field String: name of the field to modify
 532          * @param $patch String: path to the patch file
 533          * @param $fullpath Boolean: whether to treat $patch path as a relative or not
 534          */
 535         public function modifyField( $table, $field, $patch, $fullpath = false ) {
 536                 $updateKey = "$table-$field-$patch";
 537                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 538                         $this->output( "...$table table does not exist, skipping modify field patch.\n" );
 539                 } elseif ( !$this->db->fieldExists( $table, $field, __METHOD__ ) ) {
 540                         $this->output( "...$field field does not exist in $table table, skipping modify field patch.\n" );
 541                 } elseif( $this->updateRowExists( $updateKey ) ) {
 542                         $this->output( "...$field in table $table already modified by patch $patch.\n" );
 543                 } else {
 544                         $this->output( "Modifying $field field of table $table..." );
 545                         $this->applyPatch( $patch, $fullpath );
 546                         $this->insertUpdateRow( $updateKey );
 547                         $this->output( "done.\n" );
 548                 }
 549         }
 550
 551         /**
 552          * Purge the objectcache table
 553          */
 554         protected function purgeCache() {
 555                 # We can't guarantee that the user will be able to use TRUNCATE,
 556                 # but we know that DELETE is available to us
 557                 $this->output( "Purging caches..." );
 558                 $this->db->delete( 'objectcache', '*', __METHOD__ );
 559                 $this->output( "done.\n" );
 560         }
 561
 562         /**
 563          * Check the site_stats table is not properly populated.
 564          */
 565         protected function checkStats() {
 566                 $this->output( "...site_stats is populated..." );
 567                 $row = $this->db->selectRow( 'site_stats', '*', array( 'ss_row_id' => 1 ), __METHOD__ );
 568                 if ( $row === false ) {
 569                         $this->output( "data is missing! rebuilding...\n" );
 570                 } elseif ( isset( $row->site_stats ) && $row->ss_total_pages == -1 ) {
 571                         $this->output( "missing ss_total_pages, rebuilding...\n" );
 572                 } else {
 573                         $this->output( "done.\n" );
 574                         return;
 575                 }
 576                 SiteStatsInit::doAllAndCommit( $this->db );
 577         }
 578
 579         # Common updater functions
 580
 581         /**
 582          * Sets the number of active users in the site_stats table
 583          */
 584         protected function doActiveUsersInit() {
 585                 $activeUsers = $this->db->selectField( 'site_stats', 'ss_active_users', false, __METHOD__ );
 586                 if ( $activeUsers == -1 ) {
 587                         $activeUsers = $this->db->selectField( 'recentchanges',
 588                                 'COUNT( DISTINCT rc_user_text )',
 589                                 array( 'rc_user != 0', 'rc_bot' => 0, "rc_log_type != 'newusers'" ), __METHOD__
 590                         );
 591                         $this->db->update( 'site_stats',
 592                                 array( 'ss_active_users' => intval( $activeUsers ) ),
 593                                 array( 'ss_row_id' => 1 ), __METHOD__, array( 'LIMIT' => 1 )
 594                         );
 595                 }
 596                 $this->output( "...ss_active_users user count set...\n" );
 597         }
 598
 599         /**
 600          * Populates the log_user_text field in the logging table
 601          */
 602         protected function doLogUsertextPopulation() {
 603                 if ( !$this->updateRowExists( 'populate log_usertext' ) ) {
 604                         $this->output(
 605                         "Populating log_user_text field, printing progress markers. For large\n" .
 606                         "databases, you may want to hit Ctrl-C and do this manually with\n" .
 607                         "maintenance/populateLogUsertext.php.\n" );
 608
 609                         $task = $this->maintenance->runChild( 'PopulateLogUsertext' );
 610                         $task->execute();
 611                         $this->output( "done.\n" );
 612                 }
 613         }
 614
 615         /**
 616          * Migrate log params to new table and index for searching
 617          */
 618         protected function doLogSearchPopulation() {
 619                 if ( !$this->updateRowExists( 'populate log_search' ) ) {
 620                         $this->output(
 621                                 "Populating log_search table, printing progress markers. For large\n" .
 622                                 "databases, you may want to hit Ctrl-C and do this manually with\n" .
 623                                 "maintenance/populateLogSearch.php.\n" );
 624
 625                         $task = $this->maintenance->runChild( 'PopulateLogSearch' );
 626                         $task->execute();
 627                         $this->output( "done.\n" );
 628                 }
 629         }
 630
 631         /**
 632          * Updates the timestamps in the transcache table
 633          */
 634         protected function doUpdateTranscacheField() {
 635                 if ( $this->updateRowExists( 'convert transcache field' ) ) {
 636                         $this->output( "...transcache tc_time already converted.\n" );
 637                         return;
 638                 }
 639
 640                 $this->output( "Converting tc_time from UNIX epoch to MediaWiki timestamp... " );
 641                 $this->applyPatch( 'patch-tc-timestamp.sql' );
 642                 $this->output( "done.\n" );
 643         }
 644
 645         /**
 646          * Update CategoryLinks collation
 647          */
 648         protected function doCollationUpdate() {
 649                 global $wgCategoryCollation;
 650                 if ( $this->db->selectField(
 651                         'categorylinks',
 652                         'COUNT(*)',
 653                         'cl_collation != ' . $this->db->addQuotes( $wgCategoryCollation ),
 654                         __METHOD__
 655                 ) == 0 ) {
 656                         $this->output( "...collations up-to-date.\n" );
 657                         return;
 658                 }
 659
 660                 $this->output( "Updating category collations..." );
 661                 $task = $this->maintenance->runChild( 'UpdateCollation' );
 662                 $task->execute();
 663                 $this->output( "...done.\n" );
 664         }
 665
 666         /**
 667          * Migrates user options from the user table blob to user_properties
 668          */
 669         protected function doMigrateUserOptions() {
 670                 $cl = $this->maintenance->runChild( 'ConvertUserOptions', 'convertUserOptions.php' );
 671                 $cl->execute();
 672                 $this->output( "done.\n" );
 673         }
 674
 675         /**
 676          * Rebuilds the localisation cache
 677          */
 678         protected function rebuildLocalisationCache() {
 679                 /**
 680                  * @var $cl RebuildLocalisationCache
 681                  */
 682                 $cl = $this->maintenance->runChild( 'RebuildLocalisationCache', 'rebuildLocalisationCache.php' );
 683                 $this->output( "Rebuilding localisation cache...\n" );
 684                 $cl->setForce();
 685                 $cl->execute();
 686                 $this->output( "done.\n" );
 687         }
 688 }