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         const MINIMUM_PHP_VERSION = '5.2.3';
  28
  29         /**
  30          * @var array
  31          */
  32         protected $settings;
  33
  34         /**
  35          * Cached DB installer instances, access using getDBInstaller().
  36          *
  37          * @var array
  38          */
  39         protected $dbInstallers = array();
  40
  41         /**
  42          * Minimum memory size in MB.
  43          *
  44          * @var integer
  45          */
  46         protected $minMemorySize = 50;
  47
  48         /**
  49          * Cached Title, used by parse().
  50          *
  51          * @var Title
  52          */
  53         protected $parserTitle;
  54
  55         /**
  56          * Cached ParserOptions, used by parse().
  57          *
  58          * @var ParserOptions
  59          */
  60         protected $parserOptions;
  61
  62         /**
  63          * Known database types. These correspond to the class names <type>Installer,
  64          * and are also MediaWiki database types valid for $wgDBtype.
  65          *
  66          * To add a new type, create a <type>Installer class and a Database<type>
  67          * class, and add a config-type-<type> message to MessagesEn.php.
  68          *
  69          * @var array
  70          */
  71         protected static $dbTypes = array(
  72                 'mysql',
  73                 'postgres',
  74                 'oracle',
  75                 'sqlite',
  76                 'ibm_db2',
  77         );
  78
  79         /**
  80          * A list of environment check methods called by doEnvironmentChecks().
  81          * These may output warnings using showMessage(), and/or abort the
  82          * installation process by returning false.
  83          *
  84          * @var array
  85          */
  86         protected $envChecks = array(
  87                 'envCheckDB',
  88                 'envCheckRegisterGlobals',
  89                 'envCheckBrokenXML',
  90                 'envCheckPHP531',
  91                 'envCheckMagicQuotes',
  92                 'envCheckMagicSybase',
  93                 'envCheckMbstring',
  94                 'envCheckZE1',
  95                 'envCheckSafeMode',
  96                 'envCheckXML',
  97                 'envCheckPCRE',
  98                 'envCheckMemory',
  99                 'envCheckCache',
 100                 'envCheckDiff3',
 101                 'envCheckGraphics',
 102                 'envCheckServer',
 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                 'wgServer',
 136                 'wgScriptPath',
 137                 'wgScriptExtension',
 138                 'wgMetaNamespace',
 139                 'wgDeletedDirectory',
 140                 'wgEnableUploads',
 141                 'wgLogo',
 142                 'wgShellLocale',
 143                 'wgSecretKey',
 144                 'wgUseInstantCommons',
 145                 'wgUpgradeKey',
 146                 'wgDefaultSkin',
 147                 'wgResourceLoaderMaxQueryLength',
 148         );
 149
 150         /**
 151          * Variables that are stored alongside globals, and are used for any
 152          * configuration of the installation process aside from the MediaWiki
 153          * configuration. Map of names to defaults.
 154          *
 155          * @var array
 156          */
 157         protected $internalDefaults = array(
 158                 '_UserLang' => 'en',
 159                 '_Environment' => false,
 160                 '_CompiledDBs' => array(),
 161                 '_SafeMode' => false,
 162                 '_RaiseMemory' => false,
 163                 '_UpgradeDone' => false,
 164                 '_InstallDone' => false,
 165                 '_Caches' => array(),
 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, self::MINIMUM_PHP_VERSION, '>=' ) ) {
 383                         $this->showMessage( 'config-env-php', $phpVersion );
 384                         $good = true;
 385                 } else {
 386                         $this->showMessage( 'config-env-php-toolow', $phpVersion, self::MINIMUM_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 static 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                         // @todo 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( 'register_globals' ) ) {
 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                                 if ( $name == 'xcache' && !wfIniGetBool( 'xcache.var_size' ) ) {
 795                                         continue;
 796                                 }
 797                                 $caches[$name] = true;
 798                         }
 799                 }
 800
 801                 if ( !$caches ) {
 802                         $this->showMessage( 'config-no-cache' );
 803                 }
 804
 805                 $this->setVar( '_Caches', $caches );
 806         }
 807
 808         /**
 809          * Search for GNU diff3.
 810          */
 811         protected function envCheckDiff3() {
 812                 $names = array( "gdiff3", "diff3", "diff3.exe" );
 813                 $versionInfo = array( '$1 --version 2>&1', 'GNU diffutils' );
 814
 815                 $diff3 = self::locateExecutableInDefaultPaths( $names, $versionInfo );
 816
 817                 if ( $diff3 ) {
 818                         $this->setVar( 'wgDiff3', $diff3 );
 819                 } else {
 820                         $this->setVar( 'wgDiff3', false );
 821                         $this->showMessage( 'config-diff3-bad' );
 822                 }
 823         }
 824
 825         /**
 826          * Environment check for ImageMagick and GD.
 827          */
 828         protected function envCheckGraphics() {
 829                 $names = array( wfIsWindows() ? 'convert.exe' : 'convert' );
 830                 $convert = self::locateExecutableInDefaultPaths( $names, array( '$1 -version', 'ImageMagick' ) );
 831
 832                 $this->setVar( 'wgImageMagickConvertCommand', '' );
 833                 if ( $convert ) {
 834                         $this->setVar( 'wgImageMagickConvertCommand', $convert );
 835                         $this->showMessage( 'config-imagemagick', $convert );
 836                         return true;
 837                 } elseif ( function_exists( 'imagejpeg' ) ) {
 838                         $this->showMessage( 'config-gd' );
 839                         return true;
 840                 } else {
 841                         $this->showMessage( 'config-no-scaling' );
 842                 }
 843         }
 844
 845         /**
 846          * Environment check for the server hostname.
 847          */
 848         protected function envCheckServer() {
 849                 $server = WebRequest::detectServer();
 850                 $this->showMessage( 'config-using-server', $server );
 851                 $this->setVar( 'wgServer', $server );
 852         }
 853
 854         /**
 855          * Environment check for setting $IP and $wgScriptPath.
 856          */
 857         protected function envCheckPath() {
 858                 global $IP;
 859                 $IP = dirname( dirname( dirname( __FILE__ ) ) );
 860                 $this->setVar( 'IP', $IP );
 861         }
 862
 863         /**
 864          * Environment check for setting the preferred PHP file extension.
 865          */
 866         protected function envCheckExtension() {
 867                 // @todo FIXME: Detect this properly
 868                 if ( defined( 'MW_INSTALL_PHP5_EXT' ) ) {
 869                         $ext = 'php5';
 870                 } else {
 871                         $ext = 'php';
 872                 }
 873                 $this->setVar( 'wgScriptExtension', ".$ext" );
 874         }
 875
 876         /**
 877          * TODO: document
 878          */
 879         protected function envCheckShellLocale() {
 880                 $os = php_uname( 's' );
 881                 $supported = array( 'Linux', 'SunOS', 'HP-UX', 'Darwin' ); # Tested these
 882
 883                 if ( !in_array( $os, $supported ) ) {
 884                         return true;
 885                 }
 886
 887                 # Get a list of available locales.
 888                 $ret = false;
 889                 $lines = wfShellExec( '/usr/bin/locale -a', $ret );
 890
 891                 if ( $ret ) {
 892                         return true;
 893                 }
 894
 895                 $lines = wfArrayMap( 'trim', explode( "\n", $lines ) );
 896                 $candidatesByLocale = array();
 897                 $candidatesByLang = array();
 898
 899                 foreach ( $lines as $line ) {
 900                         if ( $line === '' ) {
 901                                 continue;
 902                         }
 903
 904                         if ( !preg_match( '/^([a-zA-Z]+)(_[a-zA-Z]+|)\.(utf8|UTF-8)(@[a-zA-Z_]*|)$/i', $line, $m ) ) {
 905                                 continue;
 906                         }
 907
 908                         list( $all, $lang, $territory, $charset, $modifier ) = $m;
 909
 910                         $candidatesByLocale[$m[0]] = $m;
 911                         $candidatesByLang[$lang][] = $m;
 912                 }
 913
 914                 # Try the current value of LANG.
 915                 if ( isset( $candidatesByLocale[ getenv( 'LANG' ) ] ) ) {
 916                         $this->setVar( 'wgShellLocale', getenv( 'LANG' ) );
 917                         return true;
 918                 }
 919
 920                 # Try the most common ones.
 921                 $commonLocales = array( 'en_US.UTF-8', 'en_US.utf8', 'de_DE.UTF-8', 'de_DE.utf8' );
 922                 foreach ( $commonLocales as $commonLocale ) {
 923                         if ( isset( $candidatesByLocale[$commonLocale] ) ) {
 924                                 $this->setVar( 'wgShellLocale', $commonLocale );
 925                                 return true;
 926                         }
 927                 }
 928
 929                 # Is there an available locale in the Wiki's language?
 930                 $wikiLang = $this->getVar( 'wgLanguageCode' );
 931
 932                 if ( isset( $candidatesByLang[$wikiLang] ) ) {
 933                         $m = reset( $candidatesByLang[$wikiLang] );
 934                         $this->setVar( 'wgShellLocale', $m[0] );
 935                         return true;
 936                 }
 937
 938                 # Are there any at all?
 939                 if ( count( $candidatesByLocale ) ) {
 940                         $m = reset( $candidatesByLocale );
 941                         $this->setVar( 'wgShellLocale', $m[0] );
 942                         return true;
 943                 }
 944
 945                 # Give up.
 946                 return true;
 947         }
 948
 949         /**
 950          * TODO: document
 951          */
 952         protected function envCheckUploadsDirectory() {
 953                 global $IP;
 954
 955                 $dir = $IP . '/images/';
 956                 $url = $this->getVar( 'wgServer' ) . $this->getVar( 'wgScriptPath' ) . '/images/';
 957                 $safe = !$this->dirIsExecutable( $dir, $url );
 958
 959                 if ( $safe ) {
 960                         return true;
 961                 } else {
 962                         $this->showMessage( 'config-uploads-not-safe', $dir );
 963                 }
 964         }
 965
 966         /**
 967          * Checks if suhosin.get.max_value_length is set, and if so, sets
 968          * $wgResourceLoaderMaxQueryLength to that value in the generated
 969          * LocalSettings file
 970          */
 971         protected function envCheckSuhosinMaxValueLength() {
 972                 $maxValueLength = ini_get( 'suhosin.get.max_value_length' );
 973                 if ( $maxValueLength > 0 ) {
 974                         $this->showMessage( 'config-suhosin-max-value-length', $maxValueLength );
 975                 } else {
 976                         $maxValueLength = -1;
 977                 }
 978                 $this->setVar( 'wgResourceLoaderMaxQueryLength', $maxValueLength );
 979         }
 980
 981         /**
 982          * Convert a hex string representing a Unicode code point to that code point.
 983          * @param $c String
 984          * @return string
 985          */
 986         protected function unicodeChar( $c ) {
 987                 $c = hexdec($c);
 988                 if ($c <= 0x7F) {
 989                         return chr($c);
 990                 } elseif ($c <= 0x7FF) {
 991                         return chr(0xC0 | $c >> 6) . chr(0x80 | $c & 0x3F);
 992                 } elseif ($c <= 0xFFFF) {
 993                         return chr(0xE0 | $c >> 12) . chr(0x80 | $c >> 6 & 0x3F)
 994                                 . chr(0x80 | $c & 0x3F);
 995                 } elseif ($c <= 0x10FFFF) {
 996                         return chr(0xF0 | $c >> 18) . chr(0x80 | $c >> 12 & 0x3F)
 997                                 . chr(0x80 | $c >> 6 & 0x3F)
 998                                 . chr(0x80 | $c & 0x3F);
 999                 } else {
1000                         return false;
1001                 }
1002         }
1003
1004
1005         /**
1006          * Check the libicu version
1007          */
1008         protected function envCheckLibicu() {
1009                 $utf8 = function_exists( 'utf8_normalize' );
1010                 $intl = function_exists( 'normalizer_normalize' );
1011
1012                 /**
1013                  * This needs to be updated something that the latest libicu
1014                  * will properly normalize.  This normalization was found at
1015                  * http://www.unicode.org/versions/Unicode5.2.0/#Character_Additions
1016                  * Note that we use the hex representation to create the code
1017                  * points in order to avoid any Unicode-destroying during transit.
1018                  */
1019                 $not_normal_c = $this->unicodeChar("FA6C");
1020                 $normal_c = $this->unicodeChar("242EE");
1021
1022                 $useNormalizer = 'php';
1023                 $needsUpdate = false;
1024
1025                 /**
1026                  * We're going to prefer the pecl extension here unless
1027                  * utf8_normalize is more up to date.
1028                  */
1029                 if( $utf8 ) {
1030                         $useNormalizer = 'utf8';
1031                         $utf8 = utf8_normalize( $not_normal_c, UNORM_NFC );
1032                         if ( $utf8 !== $normal_c ) $needsUpdate = true;
1033                 }
1034                 if( $intl ) {
1035                         $useNormalizer = 'intl';
1036                         $intl = normalizer_normalize( $not_normal_c, Normalizer::FORM_C );
1037                         if ( $intl !== $normal_c ) $needsUpdate = true;
1038                 }
1039
1040                 // Uses messages 'config-unicode-using-php', 'config-unicode-using-utf8', 'config-unicode-using-intl'
1041                 if( $useNormalizer === 'php' ) {
1042                         $this->showMessage( 'config-unicode-pure-php-warning' );
1043                 } else {
1044                         $this->showMessage( 'config-unicode-using-' . $useNormalizer );
1045                         if( $needsUpdate ) {
1046                                 $this->showMessage( 'config-unicode-update-warning' );
1047                         }
1048                 }
1049         }
1050
1051         /**
1052          * Get an array of likely places we can find executables. Check a bunch
1053          * of known Unix-like defaults, as well as the PATH environment variable
1054          * (which should maybe make it work for Windows?)
1055          *
1056          * @return Array
1057          */
1058         protected static function getPossibleBinPaths() {
1059                 return array_merge(
1060                         array( '/usr/bin', '/usr/local/bin', '/opt/csw/bin',
1061                                 '/usr/gnu/bin', '/usr/sfw/bin', '/sw/bin', '/opt/local/bin' ),
1062                         explode( PATH_SEPARATOR, getenv( 'PATH' ) )
1063                 );
1064         }
1065
1066         /**
1067          * Search a path for any of the given executable names. Returns the
1068          * executable name if found. Also checks the version string returned
1069          * by each executable.
1070          *
1071          * Used only by environment checks.
1072          *
1073          * @param $path String: path to search
1074          * @param $names Array of executable names
1075          * @param $versionInfo Boolean false or array with two members:
1076          *               0 => Command to run for version check, with $1 for the full executable name
1077          *               1 => String to compare the output with
1078          *
1079          * If $versionInfo is not false, only executables with a version
1080          * matching $versionInfo[1] will be returned.
1081          */
1082         public static function locateExecutable( $path, $names, $versionInfo = false ) {
1083                 if ( !is_array( $names ) ) {
1084                         $names = array( $names );
1085                 }
1086
1087                 foreach ( $names as $name ) {
1088                         $command = $path . DIRECTORY_SEPARATOR . $name;
1089
1090                         wfSuppressWarnings();
1091                         $file_exists = file_exists( $command );
1092                         wfRestoreWarnings();
1093
1094                         if ( $file_exists ) {
1095                                 if ( !$versionInfo ) {
1096                                         return $command;
1097                                 }
1098
1099                                 $file = str_replace( '$1', wfEscapeShellArg( $command ), $versionInfo[0] );
1100                                 if ( strstr( wfShellExec( $file ), $versionInfo[1] ) !== false ) {
1101                                         return $command;
1102                                 }
1103                         }
1104                 }
1105                 return false;
1106         }
1107
1108         /**
1109          * Same as locateExecutable(), but checks in getPossibleBinPaths() by default
1110          * @see locateExecutable()
1111          */
1112         public static function locateExecutableInDefaultPaths( $names, $versionInfo = false ) {
1113                 foreach( self::getPossibleBinPaths() as $path ) {
1114                         $exe = self::locateExecutable( $path, $names, $versionInfo );
1115                         if( $exe !== false ) {
1116                                 return $exe;
1117                         }
1118                 }
1119                 return false;
1120         }
1121
1122         /**
1123          * Checks if scripts located in the given directory can be executed via the given URL.
1124          *
1125          * Used only by environment checks.
1126          */
1127         public function dirIsExecutable( $dir, $url ) {
1128                 $scriptTypes = array(
1129                         'php' => array(
1130                                 "<?php echo 'ex' . 'ec';",
1131                                 "#!/var/env php5\n<?php echo 'ex' . 'ec';",
1132                         ),
1133                 );
1134
1135                 // it would be good to check other popular languages here, but it'll be slow.
1136
1137                 wfSuppressWarnings();
1138
1139                 foreach ( $scriptTypes as $ext => $contents ) {
1140                         foreach ( $contents as $source ) {
1141                                 $file = 'exectest.' . $ext;
1142
1143                                 if ( !file_put_contents( $dir . $file, $source ) ) {
1144                                         break;
1145                                 }
1146
1147                                 try {
1148                                         $text = Http::get( $url . $file, array( 'timeout' => 3 ) );
1149                                 }
1150                                 catch( MWException $e ) {
1151                                         // Http::get throws with allow_url_fopen = false and no curl extension.
1152                                         $text = null;
1153                                 }
1154                                 unlink( $dir . $file );
1155
1156                                 if ( $text == 'exec' ) {
1157                                         wfRestoreWarnings();
1158                                         return $ext;
1159                                 }
1160                         }
1161                 }
1162
1163                 wfRestoreWarnings();
1164
1165                 return false;
1166         }
1167
1168         /**
1169          * ParserOptions are constructed before we determined the language, so fix it
1170          *
1171          * @param $lang Language
1172          */
1173         public function setParserLanguage( $lang ) {
1174                 $this->parserOptions->setTargetLanguage( $lang );
1175                 $this->parserOptions->setUserLang( $lang->getCode() );
1176         }
1177
1178         /**
1179          * Overridden by WebInstaller to provide lastPage parameters.
1180          */
1181         protected function getDocUrl( $page ) {
1182                 return "{$_SERVER['PHP_SELF']}?page=" . urlencode( $page );
1183         }
1184
1185         /**
1186          * Finds extensions that follow the format /extensions/Name/Name.php,
1187          * and returns an array containing the value for 'Name' for each found extension.
1188          *
1189          * @return array
1190          */
1191         public function findExtensions() {
1192                 if( $this->getVar( 'IP' ) === null ) {
1193                         return false;
1194                 }
1195
1196                 $exts = array();
1197                 $extDir = $this->getVar( 'IP' ) . '/extensions';
1198                 $dh = opendir( $extDir );
1199
1200                 while ( ( $file = readdir( $dh ) ) !== false ) {
1201                         if( !is_dir( "$extDir/$file" ) ) {
1202                                 continue;
1203                         }
1204                         if( file_exists( "$extDir/$file/$file.php" ) ) {
1205                                 $exts[] = $file;
1206                         }
1207                 }
1208
1209                 return $exts;
1210         }
1211
1212         /**
1213          * Installs the auto-detected extensions.
1214          *
1215          * @return Status
1216          */
1217         protected function includeExtensions() {
1218                 global $IP;
1219                 $exts = $this->getVar( '_Extensions' );
1220                 $IP = $this->getVar( 'IP' );
1221
1222                 /**
1223                  * We need to include DefaultSettings before including extensions to avoid
1224                  * warnings about unset variables. However, the only thing we really
1225                  * want here is $wgHooks['LoadExtensionSchemaUpdates']. This won't work
1226                  * if the extension has hidden hook registration in $wgExtensionFunctions,
1227                  * but we're not opening that can of worms
1228                  * @see https://bugzilla.wikimedia.org/show_bug.cgi?id=26857
1229                  */
1230                 global $wgAutoloadClasses;
1231                 $wgAutoloadClasses = array();
1232
1233                 require( "$IP/includes/DefaultSettings.php" );
1234
1235                 foreach( $exts as $e ) {
1236                         require_once( "$IP/extensions/$e/$e.php" );
1237                 }
1238
1239                 $hooksWeWant = isset( $wgHooks['LoadExtensionSchemaUpdates'] ) ?
1240                         $wgHooks['LoadExtensionSchemaUpdates'] : array();
1241
1242                 // Unset everyone else's hooks. Lord knows what someone might be doing
1243                 // in ParserFirstCallInit (see bug 27171)
1244                 $GLOBALS['wgHooks'] = array( 'LoadExtensionSchemaUpdates' => $hooksWeWant );
1245
1246                 return Status::newGood();
1247         }
1248
1249         /**
1250          * Get an array of install steps. Should always be in the format of
1251          * array(
1252          *   'name'     => 'someuniquename',
1253          *   'callback' => array( $obj, 'method' ),
1254          * )
1255          * There must be a config-install-$name message defined per step, which will
1256          * be shown on install.
1257          *
1258          * @param $installer DatabaseInstaller so we can make callbacks
1259          * @return array
1260          */
1261         protected function getInstallSteps( DatabaseInstaller $installer ) {
1262                 $coreInstallSteps = array(
1263                         array( 'name' => 'database',   'callback' => array( $installer, 'setupDatabase' ) ),
1264                         array( 'name' => 'tables',     'callback' => array( $installer, 'createTables' ) ),
1265                         array( 'name' => 'interwiki',  'callback' => array( $installer, 'populateInterwikiTable' ) ),
1266                         array( 'name' => 'stats',      'callback' => array( $this, 'populateSiteStats' ) ),
1267                         array( 'name' => 'keys',       'callback' => array( $this, 'generateKeys' ) ),
1268                         array( 'name' => 'sysop',      'callback' => array( $this, 'createSysop' ) ),
1269                         array( 'name' => 'mainpage',   'callback' => array( $this, 'createMainpage' ) ),
1270                 );
1271
1272                 // Build the array of install steps starting from the core install list,
1273                 // then adding any callbacks that wanted to attach after a given step
1274                 foreach( $coreInstallSteps as $step ) {
1275                         $this->installSteps[] = $step;
1276                         if( isset( $this->extraInstallSteps[ $step['name'] ] ) ) {
1277                                 $this->installSteps = array_merge(
1278                                         $this->installSteps,
1279                                         $this->extraInstallSteps[ $step['name'] ]
1280                                 );
1281                         }
1282                 }
1283
1284                 // Prepend any steps that want to be at the beginning
1285                 if( isset( $this->extraInstallSteps['BEGINNING'] ) ) {
1286                         $this->installSteps = array_merge(
1287                                 $this->extraInstallSteps['BEGINNING'],
1288                                 $this->installSteps
1289                         );
1290                 }
1291
1292                 // Extensions should always go first, chance to tie into hooks and such
1293                 if( count( $this->getVar( '_Extensions' ) ) ) {
1294                         array_unshift( $this->installSteps,
1295                                 array( 'name' => 'extensions', 'callback' => array( $this, 'includeExtensions' ) )
1296                         );
1297                         $this->installSteps[] = array(
1298                                 'name' => 'extension-tables',
1299                                 'callback' => array( $installer, 'createExtensionTables' )
1300                         );
1301                 }
1302                 return $this->installSteps;
1303         }
1304
1305         /**
1306          * Actually perform the installation.
1307          *
1308          * @param $startCB Array A callback array for the beginning of each step
1309          * @param $endCB Array A callback array for the end of each step
1310          *
1311          * @return Array of Status objects
1312          */
1313         public function performInstallation( $startCB, $endCB ) {
1314                 $installResults = array();
1315                 $installer = $this->getDBInstaller();
1316                 $installer->preInstall();
1317                 $steps = $this->getInstallSteps( $installer );
1318                 foreach( $steps as $stepObj ) {
1319                         $name = $stepObj['name'];
1320                         call_user_func_array( $startCB, array( $name ) );
1321
1322                         // Perform the callback step
1323                         $status = call_user_func( $stepObj['callback'], $installer );
1324
1325                         // Output and save the results
1326                         call_user_func( $endCB, $name, $status );
1327                         $installResults[$name] = $status;
1328
1329                         // If we've hit some sort of fatal, we need to bail.
1330                         // Callback already had a chance to do output above.
1331                         if( !$status->isOk() ) {
1332                                 break;
1333                         }
1334                 }
1335                 if( $status->isOk() ) {
1336                         $this->setVar( '_InstallDone', true );
1337                 }
1338                 return $installResults;
1339         }
1340
1341         /**
1342          * Generate $wgSecretKey. Will warn if we had to use mt_rand() instead of
1343          * /dev/urandom
1344          *
1345          * @return Status
1346          */
1347         public function generateKeys() {
1348                 $keys = array( 'wgSecretKey' => 64 );
1349                 if ( strval( $this->getVar( 'wgUpgradeKey' ) ) === '' ) {
1350                         $keys['wgUpgradeKey'] = 16;
1351                 }
1352                 return $this->doGenerateKeys( $keys );
1353         }
1354
1355         /**
1356          * Generate a secret value for variables using either
1357          * /dev/urandom or mt_rand(). Produce a warning in the later case.
1358          *
1359          * @param $keys Array
1360          * @return Status
1361          */
1362         protected function doGenerateKeys( $keys ) {
1363                 $status = Status::newGood();
1364
1365                 wfSuppressWarnings();
1366                 $file = fopen( "/dev/urandom", "r" );
1367                 wfRestoreWarnings();
1368
1369                 foreach ( $keys as $name => $length ) {
1370                         if ( $file ) {
1371                                         $secretKey = bin2hex( fread( $file, $length / 2 ) );
1372                         } else {
1373                                 $secretKey = '';
1374
1375                                 for ( $i = 0; $i < $length / 8; $i++ ) {
1376                                         $secretKey .= dechex( mt_rand( 0, 0x7fffffff ) );
1377                                 }
1378                         }
1379
1380                         $this->setVar( $name, $secretKey );
1381                 }
1382
1383                 if ( $file ) {
1384                         fclose( $file );
1385                 } else {
1386                         $names = array_keys ( $keys );
1387                         $names = preg_replace( '/^(.*)$/', '\$$1', $names );
1388                         global $wgLang;
1389                         $status->warning( 'config-insecure-keys', $wgLang->listToText( $names ), count( $names ) );
1390                 }
1391
1392                 return $status;
1393         }
1394
1395         /**
1396          * Create the first user account, grant it sysop and bureaucrat rights
1397          *
1398          * @return Status
1399          */
1400         protected function createSysop() {
1401                 $name = $this->getVar( '_AdminName' );
1402                 $user = User::newFromName( $name );
1403
1404                 if ( !$user ) {
1405                         // We should've validated this earlier anyway!
1406                         return Status::newFatal( 'config-admin-error-user', $name );
1407                 }
1408
1409                 if ( $user->idForName() == 0 ) {
1410                         $user->addToDatabase();
1411
1412                         try {
1413                                 $user->setPassword( $this->getVar( '_AdminPassword' ) );
1414                         } catch( PasswordError $pwe ) {
1415                                 return Status::newFatal( 'config-admin-error-password', $name, $pwe->getMessage() );
1416                         }
1417
1418                         $user->addGroup( 'sysop' );
1419                         $user->addGroup( 'bureaucrat' );
1420                         if( $this->getVar( '_AdminEmail' ) ) {
1421                                 $user->setEmail( $this->getVar( '_AdminEmail' ) );
1422                         }
1423                         $user->saveSettings();
1424
1425                         // Update user count
1426                         $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
1427                         $ssUpdate->doUpdate();
1428                 }
1429                 $status = Status::newGood();
1430
1431                 if( $this->getVar( '_Subscribe' ) && $this->getVar( '_AdminEmail' ) ) {
1432                         $this->subscribeToMediaWikiAnnounce( $status );
1433                 }
1434
1435                 return $status;
1436         }
1437
1438         private function subscribeToMediaWikiAnnounce( Status $s ) {
1439                 $params = array(
1440                         'email'    => $this->getVar( '_AdminEmail' ),
1441                         'language' => 'en',
1442                         'digest'   => 0
1443                 );
1444
1445                 // Mailman doesn't support as many languages as we do, so check to make
1446                 // sure their selected language is available
1447                 $myLang = $this->getVar( '_UserLang' );
1448                 if( in_array( $myLang, $this->mediaWikiAnnounceLanguages ) ) {
1449                         $myLang = $myLang == 'pt-br' ? 'pt_BR' : $myLang; // rewrite to Mailman's pt_BR
1450                         $params['language'] = $myLang;
1451                 }
1452
1453                 if( MWHttpRequest::canMakeRequests() ) {
1454                         $res = MWHttpRequest::factory( $this->mediaWikiAnnounceUrl,
1455                                 array( 'method' => 'POST', 'postData' => $params ) )->execute();
1456                         if( !$res->isOK() ) {
1457                                 $s->warning( 'config-install-subscribe-fail', $res->getMessage() );
1458                         }
1459                 } else {
1460                         $s->warning( 'config-install-subscribe-notpossible' );
1461                 }
1462         }
1463
1464         /**
1465          * Insert Main Page with default content.
1466          *
1467          * @return Status
1468          */
1469         protected function createMainpage( DatabaseInstaller $installer ) {
1470                 $status = Status::newGood();
1471                 try {
1472                         $article = new Article( Title::newMainPage() );
1473                         $article->doEdit( wfMsgForContent( 'mainpagetext' ) . "\n\n" .
1474                                                                 wfMsgForContent( 'mainpagedocfooter' ),
1475                                                                 '',
1476                                                                 EDIT_NEW,
1477                                                                 false,
1478                                                                 User::newFromName( 'MediaWiki default' ) );
1479                 } catch (MWException $e) {
1480                         //using raw, because $wgShowExceptionDetails can not be set yet
1481                         $status->fatal( 'config-install-mainpage-failed', $e->getMessage() );
1482                 }
1483
1484                 return $status;
1485         }
1486
1487         /**
1488          * Override the necessary bits of the config to run an installation.
1489          */
1490         public static function overrideConfig() {
1491                 define( 'MW_NO_SESSION', 1 );
1492
1493                 // Don't access the database
1494                 $GLOBALS['wgUseDatabaseMessages'] = false;
1495                 // Debug-friendly
1496                 $GLOBALS['wgShowExceptionDetails'] = true;
1497                 // Don't break forms
1498                 $GLOBALS['wgExternalLinkTarget'] = '_blank';
1499
1500                 // Extended debugging
1501                 $GLOBALS['wgShowSQLErrors'] = true;
1502                 $GLOBALS['wgShowDBErrorBacktrace'] = true;
1503
1504                 // Allow multiple ob_flush() calls
1505                 $GLOBALS['wgDisableOutputCompression'] = true;
1506
1507                 // Use a sensible cookie prefix (not my_wiki)
1508                 $GLOBALS['wgCookiePrefix'] = 'mw_installer';
1509
1510                 // Some of the environment checks make shell requests, remove limits
1511                 $GLOBALS['wgMaxShellMemory'] = 0;
1512         }
1513
1514         /**
1515          * Add an installation step following the given step.
1516          *
1517          * @param $callback Array A valid installation callback array, in this form:
1518          *    array( 'name' => 'some-unique-name', 'callback' => array( $obj, 'function' ) );
1519          * @param $findStep String the step to find. Omit to put the step at the beginning
1520          */
1521         public function addInstallStep( $callback, $findStep = 'BEGINNING' ) {
1522                 $this->extraInstallSteps[$findStep][] = $callback;
1523         }
1524
1525         /**
1526          * Disable the time limit for execution.
1527          * Some long-running pages (Install, Upgrade) will want to do this
1528          */
1529         protected function disableTimeLimit() {
1530                 wfSuppressWarnings();
1531                 set_time_limit( 0 );
1532                 wfRestoreWarnings();
1533         }
1534 }