includes/installer/Installer.php

   1 <?php
   2 /**
   3  * Base code for MediaWiki installer.
   4  *
   5  * @file
   6  * @ingroup Deployment
   7  */
   8
   9 /**
  10  * This documentation group collects source code files with deployment functionality.
  11  *
  12  * @defgroup Deployment Deployment
  13  */
  14
  15 /**
  16  * Base installer class.
  17  *
  18  * This class provides the base for installation and update functionality
  19  * for both MediaWiki core and extensions.
  20  *
  21  * @ingroup Deployment
  22  * @since 1.17
  23  */
  24 abstract class Installer {
  25
  26         // This is the absolute minimum PHP version we can support
  27         // @deprecated since 1.18
  28         const MINIMUM_PHP_VERSION = MW_MIN_PHP_VERSION;
  29
  30         /**
  31          * @var array
  32          */
  33         protected $settings;
  34
  35         /**
  36          * Cached DB installer instances, access using getDBInstaller().
  37          *
  38          * @var array
  39          */
  40         protected $dbInstallers = array();
  41
  42         /**
  43          * Minimum memory size in MB.
  44          *
  45          * @var integer
  46          */
  47         protected $minMemorySize = 50;
  48
  49         /**
  50          * Cached Title, used by parse().
  51          *
  52          * @var Title
  53          */
  54         protected $parserTitle;
  55
  56         /**
  57          * Cached ParserOptions, used by parse().
  58          *
  59          * @var ParserOptions
  60          */
  61         protected $parserOptions;
  62
  63         /**
  64          * Known database types. These correspond to the class names <type>Installer,
  65          * and are also MediaWiki database types valid for $wgDBtype.
  66          *
  67          * To add a new type, create a <type>Installer class and a Database<type>
  68          * class, and add a config-type-<type> message to MessagesEn.php.
  69          *
  70          * @var array
  71          */
  72         protected static $dbTypes = array(
  73                 'mysql',
  74                 'postgres',
  75                 'oracle',
  76                 'sqlite',
  77                 'ibm_db2',
  78         );
  79
  80         /**
  81          * A list of environment check methods called by doEnvironmentChecks().
  82          * These may output warnings using showMessage(), and/or abort the
  83          * installation process by returning false.
  84          *
  85          * @var array
  86          */
  87         protected $envChecks = array(
  88                 'envCheckDB',
  89                 'envCheckRegisterGlobals',
  90                 'envCheckBrokenXML',
  91                 'envCheckPHP531',
  92                 'envCheckMagicQuotes',
  93                 'envCheckMagicSybase',
  94                 'envCheckMbstring',
  95                 'envCheckZE1',
  96                 'envCheckSafeMode',
  97                 'envCheckXML',
  98                 'envCheckPCRE',
  99                 'envCheckMemory',
 100                 'envCheckCache',
 101                 'envCheckDiff3',
 102                 'envCheckGraphics',
 103                 'envCheckPath',
 104                 'envCheckExtension',
 105                 'envCheckShellLocale',
 106                 'envCheckUploadsDirectory',
 107                 'envCheckLibicu',
 108                 'envCheckSuhosinMaxValueLength',
 109         );
 110
 111         /**
 112          * MediaWiki configuration globals that will eventually be passed through
 113          * to LocalSettings.php. The names only are given here, the defaults
 114          * typically come from DefaultSettings.php.
 115          *
 116          * @var array
 117          */
 118         protected $defaultVarNames = array(
 119                 'wgSitename',
 120                 'wgPasswordSender',
 121                 'wgLanguageCode',
 122                 'wgRightsIcon',
 123                 'wgRightsText',
 124                 'wgRightsUrl',
 125                 'wgMainCacheType',
 126                 'wgEnableEmail',
 127                 'wgEnableUserEmail',
 128                 'wgEnotifUserTalk',
 129                 'wgEnotifWatchlist',
 130                 'wgEmailAuthentication',
 131                 'wgDBtype',
 132                 'wgDiff3',
 133                 'wgImageMagickConvertCommand',
 134                 'IP',
 135                 'wgScriptPath',
 136                 'wgScriptExtension',
 137                 'wgMetaNamespace',
 138                 'wgDeletedDirectory',
 139                 'wgEnableUploads',
 140                 'wgLogo',
 141                 'wgShellLocale',
 142                 'wgSecretKey',
 143                 'wgUseInstantCommons',
 144                 'wgUpgradeKey',
 145                 'wgDefaultSkin',
 146                 'wgResourceLoaderMaxQueryLength',
 147         );
 148
 149         /**
 150          * Variables that are stored alongside globals, and are used for any
 151          * configuration of the installation process aside from the MediaWiki
 152          * configuration. Map of names to defaults.
 153          *
 154          * @var array
 155          */
 156         protected $internalDefaults = array(
 157                 '_UserLang' => 'en',
 158                 '_Environment' => false,
 159                 '_CompiledDBs' => array(),
 160                 '_SafeMode' => false,
 161                 '_RaiseMemory' => false,
 162                 '_UpgradeDone' => false,
 163                 '_InstallDone' => false,
 164                 '_Caches' => array(),
 165                 '_InstallUser' => 'root',
 166                 '_InstallPassword' => '',
 167                 '_SameAccount' => true,
 168                 '_CreateDBAccount' => false,
 169                 '_NamespaceType' => 'site-name',
 170                 '_AdminName' => '', // will be set later, when the user selects language
 171                 '_AdminPassword' => '',
 172                 '_AdminPassword2' => '',
 173                 '_AdminEmail' => '',
 174                 '_Subscribe' => false,
 175                 '_SkipOptional' => 'continue',
 176                 '_RightsProfile' => 'wiki',
 177                 '_LicenseCode' => 'none',
 178                 '_CCDone' => false,
 179                 '_Extensions' => array(),
 180                 '_MemCachedServers' => '',
 181                 '_UpgradeKeySupplied' => false,
 182                 '_ExistingDBSettings' => false,
 183         );
 184
 185         /**
 186          * The actual list of installation steps. This will be initialized by getInstallSteps()
 187          *
 188          * @var array
 189          */
 190         private $installSteps = array();
 191
 192         /**
 193          * Extra steps for installation, for things like DatabaseInstallers to modify
 194          *
 195          * @var array
 196          */
 197         protected $extraInstallSteps = array();
 198
 199         /**
 200          * Known object cache types and the functions used to test for their existence.
 201          *
 202          * @var array
 203          */
 204         protected $objectCaches = array(
 205                 'xcache' => 'xcache_get',
 206                 'apc' => 'apc_fetch',
 207                 'eaccel' => 'eaccelerator_get',
 208                 'wincache' => 'wincache_ucache_get'
 209         );
 210
 211         /**
 212          * User rights profiles.
 213          *
 214          * @var array
 215          */
 216         public $rightsProfiles = array(
 217                 'wiki' => array(),
 218                 'no-anon' => array(
 219                         '*' => array( 'edit' => false )
 220                 ),
 221                 'fishbowl' => array(
 222                         '*' => array(
 223                                 'createaccount' => false,
 224                                 'edit' => false,
 225                         ),
 226                 ),
 227                 'private' => array(
 228                         '*' => array(
 229                                 'createaccount' => false,
 230                                 'edit' => false,
 231                                 'read' => false,
 232                         ),
 233                 ),
 234         );
 235
 236         /**
 237          * License types.
 238          *
 239          * @var array
 240          */
 241         public $licenses = array(
 242                 'cc-by' => array(
 243                         'url' => 'http://creativecommons.org/licenses/by/3.0/',
 244                         'icon' => '{$wgStylePath}/common/images/cc-by.png',
 245                 ),
 246                 'cc-by-sa' => array(
 247                         'url' => 'http://creativecommons.org/licenses/by-sa/3.0/',
 248                         'icon' => '{$wgStylePath}/common/images/cc-by-sa.png',
 249                 ),
 250                 'cc-by-nc-sa' => array(
 251                         'url' => 'http://creativecommons.org/licenses/by-nc-sa/3.0/',
 252                         'icon' => '{$wgStylePath}/common/images/cc-by-nc-sa.png',
 253                 ),
 254                 'cc-0' => array(
 255                         'url' => 'https://creativecommons.org/publicdomain/zero/1.0/',
 256                         'icon' => '{$wgStylePath}/common/images/cc-0.png',
 257                 ),
 258                 'pd' => array(
 259                         'url' => '',
 260                         'icon' => '{$wgStylePath}/common/images/public-domain.png',
 261                 ),
 262                 'gfdl' => array(
 263                         'url' => 'http://www.gnu.org/copyleft/fdl.html',
 264                         'icon' => '{$wgStylePath}/common/images/gnu-fdl.png',
 265                 ),
 266                 'none' => array(
 267                         'url' => '',
 268                         'icon' => '',
 269                         'text' => ''
 270                 ),
 271                 'cc-choose' => array(
 272                         // Details will be filled in by the selector.
 273                         'url' => '',
 274                         'icon' => '',
 275                         'text' => '',
 276                 ),
 277         );
 278
 279         /**
 280          * URL to mediawiki-announce subscription
 281          */
 282         protected $mediaWikiAnnounceUrl = 'https://lists.wikimedia.org/mailman/subscribe/mediawiki-announce';
 283
 284         /**
 285          * Supported language codes for Mailman
 286          */
 287         protected $mediaWikiAnnounceLanguages = array(
 288                 'ca', 'cs', 'da', 'de', 'en', 'es', 'et', 'eu', 'fi', 'fr', 'hr', 'hu',
 289                 'it', 'ja', 'ko', 'lt', 'nl', 'no', 'pl', 'pt', 'pt-br', 'ro', 'ru',
 290                 'sl', 'sr', 'sv', 'tr', 'uk'
 291         );
 292
 293         /**
 294          * UI interface for displaying a short message
 295          * The parameters are like parameters to wfMsg().
 296          * The messages will be in wikitext format, which will be converted to an
 297          * output format such as HTML or text before being sent to the user.
 298          */
 299         public abstract function showMessage( $msg /*, ... */ );
 300
 301         /**
 302          * Same as showMessage(), but for displaying errors
 303          */
 304         public abstract function showError( $msg /*, ... */ );
 305
 306         /**
 307          * Show a message to the installing user by using a Status object
 308          * @param $status Status
 309          */
 310         public abstract function showStatusMessage( Status $status );
 311
 312         /**
 313          * Constructor, always call this from child classes.
 314          */
 315         public function __construct() {
 316                 global $wgExtensionMessagesFiles, $wgUser;
 317
 318                 // Disable the i18n cache and LoadBalancer
 319                 Language::getLocalisationCache()->disableBackend();
 320                 LBFactory::disableBackend();
 321
 322                 // Load the installer's i18n file.
 323                 $wgExtensionMessagesFiles['MediawikiInstaller'] =
 324                         dirname( __FILE__ ) . '/Installer.i18n.php';
 325
 326                 // Having a user with id = 0 safeguards us from DB access via User::loadOptions().
 327                 $wgUser = User::newFromId( 0 );
 328
 329                 $this->settings = $this->internalDefaults;
 330
 331                 foreach ( $this->defaultVarNames as $var ) {
 332                         $this->settings[$var] = $GLOBALS[$var];
 333                 }
 334
 335                 foreach ( self::getDBTypes() as $type ) {
 336                         $installer = $this->getDBInstaller( $type );
 337
 338                         if ( !$installer->isCompiled() ) {
 339                                 continue;
 340                         }
 341
 342                         $defaults = $installer->getGlobalDefaults();
 343
 344                         foreach ( $installer->getGlobalNames() as $var ) {
 345                                 if ( isset( $defaults[$var] ) ) {
 346                                         $this->settings[$var] = $defaults[$var];
 347                                 } else {
 348                                         $this->settings[$var] = $GLOBALS[$var];
 349                                 }
 350                         }
 351                 }
 352
 353                 $this->parserTitle = Title::newFromText( 'Installer' );
 354                 $this->parserOptions = new ParserOptions; // language will  be wrong :(
 355                 $this->parserOptions->setEditSection( false );
 356         }
 357
 358         /**
 359          * Get a list of known DB types.
 360          *
 361          * @return array
 362          */
 363         public static function getDBTypes() {
 364                 return self::$dbTypes;
 365         }
 366
 367         /**
 368          * Do initial checks of the PHP environment. Set variables according to
 369          * the observed environment.
 370          *
 371          * It's possible that this may be called under the CLI SAPI, not the SAPI
 372          * that the wiki will primarily run under. In that case, the subclass should
 373          * initialise variables such as wgScriptPath, before calling this function.
 374          *
 375          * Under the web subclass, it can already be assumed that PHP 5+ is in use
 376          * and that sessions are working.
 377          *
 378          * @return Status
 379          */
 380         public function doEnvironmentChecks() {
 381                 $phpVersion = phpversion();
 382                 if( version_compare( $phpVersion, MW_MIN_PHP_VERSION, '>=' ) ) {
 383                         $this->showMessage( 'config-env-php', $phpVersion );
 384                         $good = true;
 385                 } else {
 386                         $this->showMessage( 'config-env-php-toolow', $phpVersion, MW_MIN_PHP_VERSION );
 387                         $good = false;
 388                 }
 389
 390                 if( $good ) {
 391                         foreach ( $this->envChecks as $check ) {
 392                                 $status = $this->$check();
 393                                 if ( $status === false ) {
 394                                         $good = false;
 395                                 }
 396                         }
 397                 }
 398
 399                 $this->setVar( '_Environment', $good );
 400
 401                 return $good ? Status::newGood() : Status::newFatal( 'config-env-bad' );
 402         }
 403
 404         /**
 405          * Set a MW configuration variable, or internal installer configuration variable.
 406          *
 407          * @param $name String
 408          * @param $value Mixed
 409          */
 410         public function setVar( $name, $value ) {
 411                 $this->settings[$name] = $value;
 412         }
 413
 414         /**
 415          * Get an MW configuration variable, or internal installer configuration variable.
 416          * The defaults come from $GLOBALS (ultimately DefaultSettings.php).
 417          * Installer variables are typically prefixed by an underscore.
 418          *
 419          * @param $name String
 420          * @param $default Mixed
 421          *
 422          * @return mixed
 423          */
 424         public function getVar( $name, $default = null ) {
 425                 if ( !isset( $this->settings[$name] ) ) {
 426                         return $default;
 427                 } else {
 428                         return $this->settings[$name];
 429                 }
 430         }
 431
 432         /**
 433          * Get an instance of DatabaseInstaller for the specified DB type.
 434          *
 435          * @param $type Mixed: DB installer for which is needed, false to use default.
 436          *
 437          * @return DatabaseInstaller
 438          */
 439         public function getDBInstaller( $type = false ) {
 440                 if ( !$type ) {
 441                         $type = $this->getVar( 'wgDBtype' );
 442                 }
 443
 444                 $type = strtolower( $type );
 445
 446                 if ( !isset( $this->dbInstallers[$type] ) ) {
 447                         $class = ucfirst( $type ). 'Installer';
 448                         $this->dbInstallers[$type] = new $class( $this );
 449                 }
 450
 451                 return $this->dbInstallers[$type];
 452         }
 453
 454         /**
 455          * Determine if LocalSettings.php exists. If it does, return its variables,
 456          * merged with those from AdminSettings.php, as an array.
 457          *
 458          * @return Array
 459          */
 460         public function getExistingLocalSettings() {
 461                 global $IP;
 462
 463                 wfSuppressWarnings();
 464                 $_lsExists = file_exists( "$IP/LocalSettings.php" );
 465                 wfRestoreWarnings();
 466
 467                 if( !$_lsExists ) {
 468                         return false;
 469                 }
 470                 unset($_lsExists);
 471
 472                 require( "$IP/includes/DefaultSettings.php" );
 473                 require( "$IP/LocalSettings.php" );
 474                 if ( file_exists( "$IP/AdminSettings.php" ) ) {
 475                         require( "$IP/AdminSettings.php" );
 476                 }
 477                 return get_defined_vars();
 478         }
 479
 480         /**
 481          * Get a fake password for sending back to the user in HTML.
 482          * This is a security mechanism to avoid compromise of the password in the
 483          * event of session ID compromise.
 484          *
 485          * @param $realPassword String
 486          *
 487          * @return string
 488          */
 489         public function getFakePassword( $realPassword ) {
 490                 return str_repeat( '*', strlen( $realPassword ) );
 491         }
 492
 493         /**
 494          * Set a variable which stores a password, except if the new value is a
 495          * fake password in which case leave it as it is.
 496          *
 497          * @param $name String
 498          * @param $value Mixed
 499          */
 500         public function setPassword( $name, $value ) {
 501                 if ( !preg_match( '/^\*+$/', $value ) ) {
 502                         $this->setVar( $name, $value );
 503                 }
 504         }
 505
 506         /**
 507          * On POSIX systems return the primary group of the webserver we're running under.
 508          * On other systems just returns null.
 509          *
 510          * This is used to advice the user that he should chgrp his mw-config/data/images directory as the
 511          * webserver user before he can install.
 512          *
 513          * Public because SqliteInstaller needs it, and doesn't subclass Installer.
 514          *
 515          * @return mixed
 516          */
 517         public static function maybeGetWebserverPrimaryGroup() {
 518                 if ( !function_exists( 'posix_getegid' ) || !function_exists( 'posix_getpwuid' ) ) {
 519                         # I don't know this, this isn't UNIX.
 520                         return null;
 521                 }
 522
 523                 # posix_getegid() *not* getmygid() because we want the group of the webserver,
 524                 # not whoever owns the current script.
 525                 $gid = posix_getegid();
 526                 $getpwuid = posix_getpwuid( $gid );
 527                 $group = $getpwuid['name'];
 528
 529                 return $group;
 530         }
 531
 532         /**
 533          * Convert wikitext $text to HTML.
 534          *
 535          * This is potentially error prone since many parser features require a complete
 536          * installed MW database. The solution is to just not use those features when you
 537          * write your messages. This appears to work well enough. Basic formatting and
 538          * external links work just fine.
 539          *
 540          * But in case a translator decides to throw in a #ifexist or internal link or
 541          * whatever, this function is guarded to catch the attempted DB access and to present
 542          * some fallback text.
 543          *
 544          * @param $text String
 545          * @param $lineStart Boolean
 546          * @return String
 547          */
 548         public function parse( $text, $lineStart = false ) {
 549                 global $wgParser;
 550
 551                 try {
 552                         $out = $wgParser->parse( $text, $this->parserTitle, $this->parserOptions, $lineStart );
 553                         $html = $out->getText();
 554                 } catch ( DBAccessError $e ) {
 555                         $html = '<!--DB access attempted during parse-->  ' . htmlspecialchars( $text );
 556
 557                         if ( !empty( $this->debug ) ) {
 558                                 $html .= "<!--\n" . $e->getTraceAsString() . "\n-->";
 559                         }
 560                 }
 561
 562                 return $html;
 563         }
 564
 565         /**
 566          * @return ParserOptions
 567          */
 568         public function getParserOptions() {
 569                 return $this->parserOptions;
 570         }
 571
 572         public function disableLinkPopups() {
 573                 $this->parserOptions->setExternalLinkTarget( false );
 574         }
 575
 576         public function restoreLinkPopups() {
 577                 global $wgExternalLinkTarget;
 578                 $this->parserOptions->setExternalLinkTarget( $wgExternalLinkTarget );
 579         }
 580
 581         /**
 582          * Install step which adds a row to the site_stats table with appropriate
 583          * initial values.
 584          *
 585          * @param $installer DatabaseInstaller
 586          *
 587          * @return Status
 588          */
 589         public function populateSiteStats( DatabaseInstaller $installer ) {
 590                 $status = $installer->getConnection();
 591                 if ( !$status->isOK() ) {
 592                         return $status;
 593                 }
 594                 $status->value->insert( 'site_stats', array(
 595                         'ss_row_id' => 1,
 596                         'ss_total_views' => 0,
 597                         'ss_total_edits' => 0,
 598                         'ss_good_articles' => 0,
 599                         'ss_total_pages' => 0,
 600                         'ss_users' => 0,
 601                         'ss_admins' => 0,
 602                         'ss_images' => 0 ),
 603                         __METHOD__, 'IGNORE' );
 604                 return Status::newGood();
 605         }
 606
 607         /**
 608          * Exports all wg* variables stored by the installer into global scope.
 609          */
 610         public function exportVars() {
 611                 foreach ( $this->settings as $name => $value ) {
 612                         if ( substr( $name, 0, 2 ) == 'wg' ) {
 613                                 $GLOBALS[$name] = $value;
 614                         }
 615                 }
 616         }
 617
 618         /**
 619          * Environment check for DB types.
 620          */
 621         protected function envCheckDB() {
 622                 global $wgLang;
 623
 624                 $compiledDBs = array();
 625                 $allNames = array();
 626
 627                 foreach ( self::getDBTypes() as $name ) {
 628                         if ( $this->getDBInstaller( $name )->isCompiled() ) {
 629                                 $compiledDBs[] = $name;
 630                         }
 631                         $allNames[] = wfMsg( 'config-type-' . $name );
 632                 }
 633
 634                 $this->setVar( '_CompiledDBs', $compiledDBs );
 635
 636                 if ( !$compiledDBs ) {
 637                         $this->showError( 'config-no-db', $wgLang->commaList( $allNames ) );
 638                         // FIXME: this only works for the web installer!
 639                         return false;
 640                 }
 641
 642                 // Check for FTS3 full-text search module
 643                 $sqlite = $this->getDBInstaller( 'sqlite' );
 644                 if ( $sqlite->isCompiled() ) {
 645                         if( DatabaseSqlite::getFulltextSearchModule() != 'FTS3' ) {
 646                                 $this->showMessage( 'config-no-fts3' );
 647                         }
 648                 }
 649         }
 650
 651         /**
 652          * Environment check for register_globals.
 653          */
 654         protected function envCheckRegisterGlobals() {
 655                 if( wfIniGetBool( "magic_quotes_runtime" ) ) {
 656                         $this->showMessage( 'config-register-globals' );
 657                 }
 658         }
 659
 660         /**
 661          * Some versions of libxml+PHP break < and > encoding horribly
 662          */
 663         protected function envCheckBrokenXML() {
 664                 $test = new PhpXmlBugTester();
 665                 if ( !$test->ok ) {
 666                         $this->showError( 'config-brokenlibxml' );
 667                         return false;
 668                 }
 669         }
 670
 671         /**
 672          * Test PHP (probably 5.3.1, but it could regress again) to make sure that
 673          * reference parameters to __call() are not converted to null
 674          */
 675         protected function envCheckPHP531() {
 676                 $test = new PhpRefCallBugTester;
 677                 $test->execute();
 678                 if ( !$test->ok ) {
 679                         $this->showError( 'config-using531', phpversion() );
 680                         return false;
 681                 }
 682         }
 683
 684         /**
 685          * Environment check for magic_quotes_runtime.
 686          */
 687         protected function envCheckMagicQuotes() {
 688                 if( wfIniGetBool( "magic_quotes_runtime" ) ) {
 689                         $this->showError( 'config-magic-quotes-runtime' );
 690                         return false;
 691                 }
 692         }
 693
 694         /**
 695          * Environment check for magic_quotes_sybase.
 696          */
 697         protected function envCheckMagicSybase() {
 698                 if ( wfIniGetBool( 'magic_quotes_sybase' ) ) {
 699                         $this->showError( 'config-magic-quotes-sybase' );
 700                         return false;
 701                 }
 702         }
 703
 704         /**
 705          * Environment check for mbstring.func_overload.
 706          */
 707         protected function envCheckMbstring() {
 708                 if ( wfIniGetBool( 'mbstring.func_overload' ) ) {
 709                         $this->showError( 'config-mbstring' );
 710                         return false;
 711                 }
 712         }
 713
 714         /**
 715          * Environment check for zend.ze1_compatibility_mode.
 716          */
 717         protected function envCheckZE1() {
 718                 if ( wfIniGetBool( 'zend.ze1_compatibility_mode' ) ) {
 719                         $this->showError( 'config-ze1' );
 720                         return false;
 721                 }
 722         }
 723
 724         /**
 725          * Environment check for safe_mode.
 726          */
 727         protected function envCheckSafeMode() {
 728                 if ( wfIniGetBool( 'safe_mode' ) ) {
 729                         $this->setVar( '_SafeMode', true );
 730                         $this->showMessage( 'config-safe-mode' );
 731                 }
 732         }
 733
 734         /**
 735          * Environment check for the XML module.
 736          */
 737         protected function envCheckXML() {
 738                 if ( !function_exists( "utf8_encode" ) ) {
 739                         $this->showError( 'config-xml-bad' );
 740                         return false;
 741                 }
 742         }
 743
 744         /**
 745          * Environment check for the PCRE module.
 746          */
 747         protected function envCheckPCRE() {
 748                 if ( !function_exists( 'preg_match' ) ) {
 749                         $this->showError( 'config-pcre' );
 750                         return false;
 751                 }
 752                 wfSuppressWarnings();
 753                 $regexd = preg_replace( '/[\x{0430}-\x{04FF}]/iu', '', '-АБВГД-' );
 754                 wfRestoreWarnings();
 755                 if ( $regexd != '--' ) {
 756                         $this->showError( 'config-pcre-no-utf8' );
 757                         return false;
 758                 }
 759         }
 760
 761         /**
 762          * Environment check for available memory.
 763          */
 764         protected function envCheckMemory() {
 765                 $limit = ini_get( 'memory_limit' );
 766
 767                 if ( !$limit || $limit == -1 ) {
 768                         return true;
 769                 }
 770
 771                 $n = wfShorthandToInteger( $limit );
 772
 773                 if( $n < $this->minMemorySize * 1024 * 1024 ) {
 774                         $newLimit = "{$this->minMemorySize}M";
 775
 776                         if( ini_set( "memory_limit", $newLimit ) === false ) {
 777                                 $this->showMessage( 'config-memory-bad', $limit );
 778                         } else {
 779                                 $this->showMessage( 'config-memory-raised', $limit, $newLimit );
 780                                 $this->setVar( '_RaiseMemory', true );
 781                         }
 782                 } else {
 783                         return true;
 784                 }
 785         }
 786
 787         /**
 788          * Environment check for compiled object cache types.
 789          */
 790         protected function envCheckCache() {
 791                 $caches = array();
 792                 foreach ( $this->objectCaches as $name => $function ) {
 793                         if ( function_exists( $function ) ) {
 794                                 $caches[$name] = true;
 795                         }
 796                 }
 797
 798                 if ( !$caches ) {
 799                         $this->showMessage( 'config-no-cache' );
 800                 }
 801
 802                 $this->setVar( '_Caches', $caches );
 803         }
 804
 805         /**
 806          * Search for GNU diff3.
 807          */
 808         protected function envCheckDiff3() {
 809                 $names = array( "gdiff3", "diff3", "diff3.exe" );
 810                 $versionInfo = array( '$1 --version 2>&1', 'GNU diffutils' );
 811
 812                 $diff3 = self::locateExecutableInDefaultPaths( $names, $versionInfo );
 813
 814                 if ( $diff3 ) {
 815                         $this->setVar( 'wgDiff3', $diff3 );
 816                 } else {
 817                         $this->setVar( 'wgDiff3', false );
 818                         $this->showMessage( 'config-diff3-bad' );
 819                 }
 820         }
 821
 822         /**
 823          * Environment check for ImageMagick and GD.
 824          */
 825         protected function envCheckGraphics() {
 826                 $names = array( wfIsWindows() ? 'convert.exe' : 'convert' );
 827                 $convert = self::locateExecutableInDefaultPaths( $names, array( '$1 -version', 'ImageMagick' ) );
 828
 829                 $this->setVar( 'wgImageMagickConvertCommand', '' );
 830                 if ( $convert ) {
 831                         $this->setVar( 'wgImageMagickConvertCommand', $convert );
 832                         $this->showMessage( 'config-imagemagick', $convert );
 833                         return true;
 834                 } elseif ( function_exists( 'imagejpeg' ) ) {
 835                         $this->showMessage( 'config-gd' );
 836                         return true;
 837                 } else {
 838                         $this->showMessage( 'config-no-scaling' );
 839                 }
 840         }
 841
 842         /**
 843          * Environment check for setting $IP and $wgScriptPath.
 844          */
 845         protected function envCheckPath() {
 846                 global $IP;
 847                 $IP = dirname( dirname( dirname( __FILE__ ) ) );
 848
 849                 $this->setVar( 'IP', $IP );
 850
 851                 // PHP_SELF isn't available sometimes, such as when PHP is CGI but
 852                 // cgi.fix_pathinfo is disabled. In that case, fall back to SCRIPT_NAME
 853                 // to get the path to the current script... hopefully it's reliable. SIGH
 854                 if ( !empty( $_SERVER['PHP_SELF'] ) ) {
 855                         $path = $_SERVER['PHP_SELF'];
 856                 } elseif ( !empty( $_SERVER['SCRIPT_NAME'] ) ) {
 857                         $path = $_SERVER['SCRIPT_NAME'];
 858                 } elseif ( $this->getVar( 'wgScriptPath' ) ) {
 859                         // Some kind soul has set it for us already (e.g. debconf)
 860                         return true;
 861                 } else {
 862                         $this->showError( 'config-no-uri' );
 863                         return false;
 864                 }
 865
 866                 $uri = preg_replace( '{^(.*)/(mw-)?config.*$}', '$1', $path );
 867                 $this->setVar( 'wgScriptPath', $uri );
 868         }
 869
 870         /**
 871          * Environment check for setting the preferred PHP file extension.
 872          */
 873         protected function envCheckExtension() {
 874                 // FIXME: detect this properly
 875                 if ( defined( 'MW_INSTALL_PHP5_EXT' ) ) {
 876                         $ext = 'php5';
 877                 } else {
 878                         $ext = 'php';
 879                 }
 880                 $this->setVar( 'wgScriptExtension', ".$ext" );
 881         }
 882
 883         /**
 884          * TODO: document
 885          */
 886         protected function envCheckShellLocale() {
 887                 $os = php_uname( 's' );
 888                 $supported = array( 'Linux', 'SunOS', 'HP-UX', 'Darwin' ); # Tested these
 889
 890                 if ( !in_array( $os, $supported ) ) {
 891                         return true;
 892                 }
 893
 894                 # Get a list of available locales.
 895                 $ret = false;
 896                 $lines = wfShellExec( '/usr/bin/locale -a', $ret );
 897
 898                 if ( $ret ) {
 899                         return true;
 900                 }
 901
 902                 $lines = wfArrayMap( 'trim', explode( "\n", $lines ) );
 903                 $candidatesByLocale = array();
 904                 $candidatesByLang = array();
 905
 906                 foreach ( $lines as $line ) {
 907                         if ( $line === '' ) {
 908                                 continue;
 909                         }
 910
 911                         if ( !preg_match( '/^([a-zA-Z]+)(_[a-zA-Z]+|)\.(utf8|UTF-8)(@[a-zA-Z_]*|)$/i', $line, $m ) ) {
 912                                 continue;
 913                         }
 914
 915                         list( $all, $lang, $territory, $charset, $modifier ) = $m;
 916
 917                         $candidatesByLocale[$m[0]] = $m;
 918                         $candidatesByLang[$lang][] = $m;
 919                 }
 920
 921                 # Try the current value of LANG.
 922                 if ( isset( $candidatesByLocale[ getenv( 'LANG' ) ] ) ) {
 923                         $this->setVar( 'wgShellLocale', getenv( 'LANG' ) );
 924                         return true;
 925                 }
 926
 927                 # Try the most common ones.
 928                 $commonLocales = array( 'en_US.UTF-8', 'en_US.utf8', 'de_DE.UTF-8', 'de_DE.utf8' );
 929                 foreach ( $commonLocales as $commonLocale ) {
 930                         if ( isset( $candidatesByLocale[$commonLocale] ) ) {
 931                                 $this->setVar( 'wgShellLocale', $commonLocale );
 932                                 return true;
 933                         }
 934                 }
 935
 936                 # Is there an available locale in the Wiki's language?
 937                 $wikiLang = $this->getVar( 'wgLanguageCode' );
 938
 939                 if ( isset( $candidatesByLang[$wikiLang] ) ) {
 940                         $m = reset( $candidatesByLang[$wikiLang] );
 941                         $this->setVar( 'wgShellLocale', $m[0] );
 942                         return true;
 943                 }
 944
 945                 # Are there any at all?
 946                 if ( count( $candidatesByLocale ) ) {
 947                         $m = reset( $candidatesByLocale );
 948                         $this->setVar( 'wgShellLocale', $m[0] );
 949                         return true;
 950                 }
 951
 952                 # Give up.
 953                 return true;
 954         }
 955
 956         /**
 957          * TODO: document
 958          */
 959         protected function envCheckUploadsDirectory() {
 960                 global $IP, $wgServer;
 961
 962                 $dir = $IP . '/images/';
 963                 $url = $wgServer . $this->getVar( 'wgScriptPath' ) . '/images/';
 964                 $safe = !$this->dirIsExecutable( $dir, $url );
 965
 966                 if ( $safe ) {
 967                         return true;
 968                 } else {
 969                         $this->showMessage( 'config-uploads-not-safe', $dir );
 970                 }
 971         }
 972
 973         /**
 974          * Checks if suhosin.get.max_value_length is set, and if so, sets
 975          * $wgResourceLoaderMaxQueryLength to that value in the generated
 976          * LocalSettings file
 977          */
 978         protected function envCheckSuhosinMaxValueLength() {
 979                 $maxValueLength = ini_get( 'suhosin.get.max_value_length' );
 980                 if ( $maxValueLength > 0 ) {
 981                         $this->showMessage( 'config-suhosin-max-value-length', $maxValueLength );
 982                 } else {
 983                         $maxValueLength = -1;
 984                 }
 985                 $this->setVar( 'wgResourceLoaderMaxQueryLength', $maxValueLength );
 986         }
 987
 988         /**
 989          * Convert a hex string representing a Unicode code point to that code point.
 990          * @param $c String
 991          * @return string
 992          */
 993         protected function unicodeChar( $c ) {
 994                 $c = hexdec($c);
 995                 if ($c <= 0x7F) {
 996                         return chr($c);
 997                 } else if ($c <= 0x7FF) {
 998                         return chr(0xC0 | $c >> 6) . chr(0x80 | $c & 0x3F);
 999                 } else if ($c <= 0xFFFF) {
1000                         return chr(0xE0 | $c >> 12) . chr(0x80 | $c >> 6 & 0x3F)
1001                                 . chr(0x80 | $c & 0x3F);
1002                 } else if ($c <= 0x10FFFF) {
1003                         return chr(0xF0 | $c >> 18) . chr(0x80 | $c >> 12 & 0x3F)
1004                                 . chr(0x80 | $c >> 6 & 0x3F)
1005                                 . chr(0x80 | $c & 0x3F);
1006                 } else {
1007                         return false;
1008                 }
1009         }
1010
1011
1012         /**
1013          * Check the libicu version
1014          */
1015         protected function envCheckLibicu() {
1016                 $utf8 = function_exists( 'utf8_normalize' );
1017                 $intl = function_exists( 'normalizer_normalize' );
1018
1019                 /**
1020                  * This needs to be updated something that the latest libicu
1021                  * will properly normalize.  This normalization was found at
1022                  * http://www.unicode.org/versions/Unicode5.2.0/#Character_Additions
1023                  * Note that we use the hex representation to create the code
1024                  * points in order to avoid any Unicode-destroying during transit.
1025                  */
1026                 $not_normal_c = $this->unicodeChar("FA6C");
1027                 $normal_c = $this->unicodeChar("242EE");
1028
1029                 $useNormalizer = 'php';
1030                 $needsUpdate = false;
1031
1032                 /**
1033                  * We're going to prefer the pecl extension here unless
1034                  * utf8_normalize is more up to date.
1035                  */
1036                 if( $utf8 ) {
1037                         $useNormalizer = 'utf8';
1038                         $utf8 = utf8_normalize( $not_normal_c, UNORM_NFC );
1039                         if ( $utf8 !== $normal_c ) $needsUpdate = true;
1040                 }
1041                 if( $intl ) {
1042                         $useNormalizer = 'intl';
1043                         $intl = normalizer_normalize( $not_normal_c, Normalizer::FORM_C );
1044                         if ( $intl !== $normal_c ) $needsUpdate = true;
1045                 }
1046
1047                 // Uses messages 'config-unicode-using-php', 'config-unicode-using-utf8', 'config-unicode-using-intl'
1048                 if( $useNormalizer === 'php' ) {
1049                         $this->showMessage( 'config-unicode-pure-php-warning' );
1050                 } else {
1051                         $this->showMessage( 'config-unicode-using-' . $useNormalizer );
1052                         if( $needsUpdate ) {
1053                                 $this->showMessage( 'config-unicode-update-warning' );
1054                         }
1055                 }
1056         }
1057
1058         /**
1059          * Get an array of likely places we can find executables. Check a bunch
1060          * of known Unix-like defaults, as well as the PATH environment variable
1061          * (which should maybe make it work for Windows?)
1062          *
1063          * @return Array
1064          */
1065         protected static function getPossibleBinPaths() {
1066                 return array_merge(
1067                         array( '/usr/bin', '/usr/local/bin', '/opt/csw/bin',
1068                                 '/usr/gnu/bin', '/usr/sfw/bin', '/sw/bin', '/opt/local/bin' ),
1069                         explode( PATH_SEPARATOR, getenv( 'PATH' ) )
1070                 );
1071         }
1072
1073         /**
1074          * Search a path for any of the given executable names. Returns the
1075          * executable name if found. Also checks the version string returned
1076          * by each executable.
1077          *
1078          * Used only by environment checks.
1079          *
1080          * @param $path String: path to search
1081          * @param $names Array of executable names
1082          * @param $versionInfo Boolean false or array with two members:
1083          *               0 => Command to run for version check, with $1 for the full executable name
1084          *               1 => String to compare the output with
1085          *
1086          * If $versionInfo is not false, only executables with a version
1087          * matching $versionInfo[1] will be returned.
1088          */
1089         public static function locateExecutable( $path, $names, $versionInfo = false ) {
1090                 if ( !is_array( $names ) ) {
1091                         $names = array( $names );
1092                 }
1093
1094                 foreach ( $names as $name ) {
1095                         $command = $path . DIRECTORY_SEPARATOR . $name;
1096
1097                         wfSuppressWarnings();
1098                         $file_exists = file_exists( $command );
1099                         wfRestoreWarnings();
1100
1101                         if ( $file_exists ) {
1102                                 if ( !$versionInfo ) {
1103                                         return $command;
1104                                 }
1105
1106                                 $file = str_replace( '$1', wfEscapeShellArg( $command ), $versionInfo[0] );
1107                                 if ( strstr( wfShellExec( $file ), $versionInfo[1] ) !== false ) {
1108                                         return $command;
1109                                 }
1110                         }
1111                 }
1112                 return false;
1113         }
1114
1115         /**
1116          * Same as locateExecutable(), but checks in getPossibleBinPaths() by default
1117          * @see locateExecutable()
1118          */
1119         public static function locateExecutableInDefaultPaths( $names, $versionInfo = false ) {
1120                 foreach( self::getPossibleBinPaths() as $path ) {
1121                         $exe = self::locateExecutable( $path, $names, $versionInfo );
1122                         if( $exe !== false ) {
1123                                 return $exe;
1124                         }
1125                 }
1126                 return false;
1127         }
1128
1129         /**
1130          * Checks if scripts located in the given directory can be executed via the given URL.
1131          *
1132          * Used only by environment checks.
1133          */
1134         public function dirIsExecutable( $dir, $url ) {
1135                 $scriptTypes = array(
1136                         'php' => array(
1137                                 "<?php echo 'ex' . 'ec';",
1138                                 "#!/var/env php5\n<?php echo 'ex' . 'ec';",
1139                         ),
1140                 );
1141
1142                 // it would be good to check other popular languages here, but it'll be slow.
1143
1144                 wfSuppressWarnings();
1145
1146                 foreach ( $scriptTypes as $ext => $contents ) {
1147                         foreach ( $contents as $source ) {
1148                                 $file = 'exectest.' . $ext;
1149
1150                                 if ( !file_put_contents( $dir . $file, $source ) ) {
1151                                         break;
1152                                 }
1153
1154                                 $text = Http::get( $url . $file, array( 'timeout' => 3 ) );
1155                                 unlink( $dir . $file );
1156
1157                                 if ( $text == 'exec' ) {
1158                                         wfRestoreWarnings();
1159                                         return $ext;
1160                                 }
1161                         }
1162                 }
1163
1164                 wfRestoreWarnings();
1165
1166                 return false;
1167         }
1168
1169         /**
1170          * ParserOptions are constructed before we determined the language, so fix it
1171          */
1172         public function setParserLanguage( $lang ) {
1173                 $this->parserOptions->setTargetLanguage( $lang );
1174                 $this->parserOptions->setUserLang( $lang->getCode() );
1175         }
1176
1177         /**
1178          * Overridden by WebInstaller to provide lastPage parameters.
1179          */
1180         protected function getDocUrl( $page ) {
1181                 return "{$_SERVER['PHP_SELF']}?page=" . urlencode( $page );
1182         }
1183
1184         /**
1185          * Finds extensions that follow the format /extensions/Name/Name.php,
1186          * and returns an array containing the value for 'Name' for each found extension.
1187          *
1188          * @return array
1189          */
1190         public function findExtensions() {
1191                 if( $this->getVar( 'IP' ) === null ) {
1192                         return false;
1193                 }
1194
1195                 $exts = array();
1196                 $dir = $this->getVar( 'IP' ) . '/extensions';
1197                 $dh = opendir( $dir );
1198
1199                 while ( ( $file = readdir( $dh ) ) !== false ) {
1200                         if( file_exists( "$dir/$file/$file.php" ) ) {
1201                                 $exts[] = $file;
1202                         }
1203                 }
1204
1205                 return $exts;
1206         }
1207
1208         /**
1209          * Installs the auto-detected extensions.
1210          *
1211          * @return Status
1212          */
1213         protected function includeExtensions() {
1214                 global $IP;
1215                 $exts = $this->getVar( '_Extensions' );
1216                 $IP = $this->getVar( 'IP' );
1217                 $path = $IP . '/extensions';
1218
1219                 /**
1220                  * We need to include DefaultSettings before including extensions to avoid
1221                  * warnings about unset variables. However, the only thing we really
1222                  * want here is $wgHooks['LoadExtensionSchemaUpdates']. This won't work
1223                  * if the extension has hidden hook registration in $wgExtensionFunctions,
1224                  * but we're not opening that can of worms
1225                  * @see https://bugzilla.wikimedia.org/show_bug.cgi?id=26857
1226                  */
1227                 global $wgAutoloadClasses;
1228                 $wgAutoloadClasses = array();
1229
1230                 require( "$IP/includes/DefaultSettings.php" );
1231
1232                 foreach( $exts as $e ) {
1233                         require_once( "$path/$e/$e.php" );
1234                 }
1235
1236                 $hooksWeWant = isset( $wgHooks['LoadExtensionSchemaUpdates'] ) ?
1237                         $wgHooks['LoadExtensionSchemaUpdates'] : array();
1238
1239                 // Unset everyone else's hooks. Lord knows what someone might be doing
1240                 // in ParserFirstCallInit (see bug 27171)
1241                 $GLOBALS['wgHooks'] = array( 'LoadExtensionSchemaUpdates' => $hooksWeWant );
1242
1243                 return Status::newGood();
1244         }
1245
1246         /**
1247          * Get an array of install steps. Should always be in the format of
1248          * array(
1249          *   'name'     => 'someuniquename',
1250          *   'callback' => array( $obj, 'method' ),
1251          * )
1252          * There must be a config-install-$name message defined per step, which will
1253          * be shown on install.
1254          *
1255          * @param $installer DatabaseInstaller so we can make callbacks
1256          * @return array
1257          */
1258         protected function getInstallSteps( DatabaseInstaller $installer ) {
1259                 $coreInstallSteps = array(
1260                         array( 'name' => 'database',   'callback' => array( $installer, 'setupDatabase' ) ),
1261                         array( 'name' => 'tables',     'callback' => array( $installer, 'createTables' ) ),
1262                         array( 'name' => 'interwiki',  'callback' => array( $installer, 'populateInterwikiTable' ) ),
1263                         array( 'name' => 'stats',      'callback' => array( $this, 'populateSiteStats' ) ),
1264                         array( 'name' => 'keys',       'callback' => array( $this, 'generateKeys' ) ),
1265                         array( 'name' => 'sysop',      'callback' => array( $this, 'createSysop' ) ),
1266                         array( 'name' => 'mainpage',   'callback' => array( $this, 'createMainpage' ) ),
1267                 );
1268
1269                 // Build the array of install steps starting from the core install list,
1270                 // then adding any callbacks that wanted to attach after a given step
1271                 foreach( $coreInstallSteps as $step ) {
1272                         $this->installSteps[] = $step;
1273                         if( isset( $this->extraInstallSteps[ $step['name'] ] ) ) {
1274                                 $this->installSteps = array_merge(
1275                                         $this->installSteps,
1276                                         $this->extraInstallSteps[ $step['name'] ]
1277                                 );
1278                         }
1279                 }
1280
1281                 // Prepend any steps that want to be at the beginning
1282                 if( isset( $this->extraInstallSteps['BEGINNING'] ) ) {
1283                         $this->installSteps = array_merge(
1284                                 $this->extraInstallSteps['BEGINNING'],
1285                                 $this->installSteps
1286                         );
1287                 }
1288
1289                 // Extensions should always go first, chance to tie into hooks and such
1290                 if( count( $this->getVar( '_Extensions' ) ) ) {
1291                         array_unshift( $this->installSteps,
1292                                 array( 'name' => 'extensions', 'callback' => array( $this, 'includeExtensions' ) )
1293                         );
1294                         $this->installSteps[] = array(
1295                                 'name' => 'extension-tables',
1296                                 'callback' => array( $installer, 'createExtensionTables' )
1297                         );
1298                 }
1299                 return $this->installSteps;
1300         }
1301
1302         /**
1303          * Actually perform the installation.
1304          *
1305          * @param $startCB Array A callback array for the beginning of each step
1306          * @param $endCB Array A callback array for the end of each step
1307          *
1308          * @return Array of Status objects
1309          */
1310         public function performInstallation( $startCB, $endCB ) {
1311                 $installResults = array();
1312                 $installer = $this->getDBInstaller();
1313                 $installer->preInstall();
1314                 $steps = $this->getInstallSteps( $installer );
1315                 foreach( $steps as $stepObj ) {
1316                         $name = $stepObj['name'];
1317                         call_user_func_array( $startCB, array( $name ) );
1318
1319                         // Perform the callback step
1320                         $status = call_user_func( $stepObj['callback'], $installer );
1321
1322                         // Output and save the results
1323                         call_user_func( $endCB, $name, $status );
1324                         $installResults[$name] = $status;
1325
1326                         // If we've hit some sort of fatal, we need to bail.
1327                         // Callback already had a chance to do output above.
1328                         if( !$status->isOk() ) {
1329                                 break;
1330                         }
1331                 }
1332                 if( $status->isOk() ) {
1333                         $this->setVar( '_InstallDone', true );
1334                 }
1335                 return $installResults;
1336         }
1337
1338         /**
1339          * Generate $wgSecretKey. Will warn if we had to use mt_rand() instead of
1340          * /dev/urandom
1341          *
1342          * @return Status
1343          */
1344         public function generateKeys() {
1345                 $keys = array( 'wgSecretKey' => 64 );
1346                 if ( strval( $this->getVar( 'wgUpgradeKey' ) ) === '' ) {
1347                         $keys['wgUpgradeKey'] = 16;
1348                 }
1349                 return $this->doGenerateKeys( $keys );
1350         }
1351
1352         /**
1353          * Generate a secret value for variables using either
1354          * /dev/urandom or mt_rand(). Produce a warning in the later case.
1355          *
1356          * @param $keys Array
1357          * @return Status
1358          */
1359         protected function doGenerateKeys( $keys ) {
1360                 $status = Status::newGood();
1361
1362                 wfSuppressWarnings();
1363                 $file = fopen( "/dev/urandom", "r" );
1364                 wfRestoreWarnings();
1365
1366                 foreach ( $keys as $name => $length ) {
1367                         if ( $file ) {
1368                                         $secretKey = bin2hex( fread( $file, $length / 2 ) );
1369                         } else {
1370                                 $secretKey = '';
1371
1372                                 for ( $i = 0; $i < $length / 8; $i++ ) {
1373                                         $secretKey .= dechex( mt_rand( 0, 0x7fffffff ) );
1374                                 }
1375                         }
1376
1377                         $this->setVar( $name, $secretKey );
1378                 }
1379
1380                 if ( $file ) {
1381                         fclose( $file );
1382                 } else {
1383                         $names = array_keys ( $keys );
1384                         $names = preg_replace( '/^(.*)$/', '\$$1', $names );
1385                         global $wgLang;
1386                         $status->warning( 'config-insecure-keys', $wgLang->listToText( $names ), count( $names ) );
1387                 }
1388
1389                 return $status;
1390         }
1391
1392         /**
1393          * Create the first user account, grant it sysop and bureaucrat rights
1394          *
1395          * @return Status
1396          */
1397         protected function createSysop() {
1398                 $name = $this->getVar( '_AdminName' );
1399                 $user = User::newFromName( $name );
1400
1401                 if ( !$user ) {
1402                         // We should've validated this earlier anyway!
1403                         return Status::newFatal( 'config-admin-error-user', $name );
1404                 }
1405
1406                 if ( $user->idForName() == 0 ) {
1407                         $user->addToDatabase();
1408
1409                         try {
1410                                 $user->setPassword( $this->getVar( '_AdminPassword' ) );
1411                         } catch( PasswordError $pwe ) {
1412                                 return Status::newFatal( 'config-admin-error-password', $name, $pwe->getMessage() );
1413                         }
1414
1415                         $user->addGroup( 'sysop' );
1416                         $user->addGroup( 'bureaucrat' );
1417                         if( $this->getVar( '_AdminEmail' ) ) {
1418                                 $user->setEmail( $this->getVar( '_AdminEmail' ) );
1419                         }
1420                         $user->saveSettings();
1421
1422                         // Update user count
1423                         $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
1424                         $ssUpdate->doUpdate();
1425                 }
1426                 $status = Status::newGood();
1427
1428                 if( $this->getVar( '_Subscribe' ) && $this->getVar( '_AdminEmail' ) ) {
1429                         $this->subscribeToMediaWikiAnnounce( $status );
1430                 }
1431
1432                 return $status;
1433         }
1434
1435         private function subscribeToMediaWikiAnnounce( Status $s ) {
1436                 $params = array(
1437                         'email'    => $this->getVar( '_AdminEmail' ),
1438                         'language' => 'en',
1439                         'digest'   => 0
1440                 );
1441
1442                 // Mailman doesn't support as many languages as we do, so check to make
1443                 // sure their selected language is available
1444                 $myLang = $this->getVar( '_UserLang' );
1445                 if( in_array( $myLang, $this->mediaWikiAnnounceLanguages ) ) {
1446                         $myLang = $myLang == 'pt-br' ? 'pt_BR' : $myLang; // rewrite to Mailman's pt_BR
1447                         $params['language'] = $myLang;
1448                 }
1449
1450                 $res = Http::post( $this->mediaWikiAnnounceUrl, array( 'postData' => $params ) );
1451                 if( !$res ) {
1452                         $s->warning( 'config-install-subscribe-fail' );
1453                 }
1454         }
1455
1456         /**
1457          * Insert Main Page with default content.
1458          *
1459          * @return Status
1460          */
1461         protected function createMainpage( DatabaseInstaller $installer ) {
1462                 $status = Status::newGood();
1463                 try {
1464                         $article = new Article( Title::newMainPage() );
1465                         $article->doEdit( wfMsgForContent( 'mainpagetext' ) . "\n\n" .
1466                                                                 wfMsgForContent( 'mainpagedocfooter' ),
1467                                                                 '',
1468                                                                 EDIT_NEW,
1469                                                                 false,
1470                                                                 User::newFromName( 'MediaWiki default' ) );
1471                 } catch (MWException $e) {
1472                         //using raw, because $wgShowExceptionDetails can not be set yet
1473                         $status->fatal( 'config-install-mainpage-failed', $e->getMessage() );
1474                 }
1475
1476                 return $status;
1477         }
1478
1479         /**
1480          * Override the necessary bits of the config to run an installation.
1481          */
1482         public static function overrideConfig() {
1483                 define( 'MW_NO_SESSION', 1 );
1484
1485                 // Don't access the database
1486                 $GLOBALS['wgUseDatabaseMessages'] = false;
1487                 // Debug-friendly
1488                 $GLOBALS['wgShowExceptionDetails'] = true;
1489                 // Don't break forms
1490                 $GLOBALS['wgExternalLinkTarget'] = '_blank';
1491
1492                 // Extended debugging
1493                 $GLOBALS['wgShowSQLErrors'] = true;
1494                 $GLOBALS['wgShowDBErrorBacktrace'] = true;
1495
1496                 // Allow multiple ob_flush() calls
1497                 $GLOBALS['wgDisableOutputCompression'] = true;
1498
1499                 // Use a sensible cookie prefix (not my_wiki)
1500                 $GLOBALS['wgCookiePrefix'] = 'mw_installer';
1501
1502                 // Some of the environment checks make shell requests, remove limits
1503                 $GLOBALS['wgMaxShellMemory'] = 0;
1504         }
1505
1506         /**
1507          * Add an installation step following the given step.
1508          *
1509          * @param $callback Array A valid installation callback array, in this form:
1510          *    array( 'name' => 'some-unique-name', 'callback' => array( $obj, 'function' ) );
1511          * @param $findStep String the step to find. Omit to put the step at the beginning
1512          */
1513         public function addInstallStep( $callback, $findStep = 'BEGINNING' ) {
1514                 $this->extraInstallSteps[$findStep][] = $callback;
1515         }
1516 }