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                 'envCheckPath',
 103                 'envCheckExtension',
 104                 'envCheckShellLocale',
 105                 'envCheckUploadsDirectory',
 106                 'envCheckLibicu',
 107                 'envCheckSuhosinMaxValueLength',
 108         );
 109
 110         /**
 111          * MediaWiki configuration globals that will eventually be passed through
 112          * to LocalSettings.php. The names only are given here, the defaults
 113          * typically come from DefaultSettings.php.
 114          *
 115          * @var array
 116          */
 117         protected $defaultVarNames = array(
 118                 'wgSitename',
 119                 'wgPasswordSender',
 120                 'wgLanguageCode',
 121                 'wgRightsIcon',
 122                 'wgRightsText',
 123                 'wgRightsUrl',
 124                 'wgMainCacheType',
 125                 'wgEnableEmail',
 126                 'wgEnableUserEmail',
 127                 'wgEnotifUserTalk',
 128                 'wgEnotifWatchlist',
 129                 'wgEmailAuthentication',
 130                 'wgDBtype',
 131                 'wgDiff3',
 132                 'wgImageMagickConvertCommand',
 133                 'IP',
 134                 'wgScriptPath',
 135                 'wgScriptExtension',
 136                 'wgMetaNamespace',
 137                 'wgDeletedDirectory',
 138                 'wgEnableUploads',
 139                 'wgLogo',
 140                 'wgShellLocale',
 141                 'wgSecretKey',
 142                 'wgUseInstantCommons',
 143                 'wgUpgradeKey',
 144                 'wgDefaultSkin',
 145                 'wgResourceLoaderMaxQueryLength',
 146         );
 147
 148         /**
 149          * Variables that are stored alongside globals, and are used for any
 150          * configuration of the installation process aside from the MediaWiki
 151          * configuration. Map of names to defaults.
 152          *
 153          * @var array
 154          */
 155         protected $internalDefaults = array(
 156                 '_UserLang' => 'en',
 157                 '_Environment' => false,
 158                 '_CompiledDBs' => array(),
 159                 '_SafeMode' => false,
 160                 '_RaiseMemory' => false,
 161                 '_UpgradeDone' => false,
 162                 '_InstallDone' => false,
 163                 '_Caches' => array(),
 164                 '_InstallUser' => 'root',
 165                 '_InstallPassword' => '',
 166                 '_SameAccount' => true,
 167                 '_CreateDBAccount' => false,
 168                 '_NamespaceType' => 'site-name',
 169                 '_AdminName' => '', // will be set later, when the user selects language
 170                 '_AdminPassword' => '',
 171                 '_AdminPassword2' => '',
 172                 '_AdminEmail' => '',
 173                 '_Subscribe' => false,
 174                 '_SkipOptional' => 'continue',
 175                 '_RightsProfile' => 'wiki',
 176                 '_LicenseCode' => 'none',
 177                 '_CCDone' => false,
 178                 '_Extensions' => array(),
 179                 '_MemCachedServers' => '',
 180                 '_UpgradeKeySupplied' => false,
 181                 '_ExistingDBSettings' => false,
 182         );
 183
 184         /**
 185          * The actual list of installation steps. This will be initialized by getInstallSteps()
 186          *
 187          * @var array
 188          */
 189         private $installSteps = array();
 190
 191         /**
 192          * Extra steps for installation, for things like DatabaseInstallers to modify
 193          *
 194          * @var array
 195          */
 196         protected $extraInstallSteps = array();
 197
 198         /**
 199          * Known object cache types and the functions used to test for their existence.
 200          *
 201          * @var array
 202          */
 203         protected $objectCaches = array(
 204                 'xcache' => 'xcache_get',
 205                 'apc' => 'apc_fetch',
 206                 'eaccel' => 'eaccelerator_get',
 207                 'wincache' => 'wincache_ucache_get'
 208         );
 209
 210         /**
 211          * User rights profiles.
 212          *
 213          * @var array
 214          */
 215         public $rightsProfiles = array(
 216                 'wiki' => array(),
 217                 'no-anon' => array(
 218                         '*' => array( 'edit' => false )
 219                 ),
 220                 'fishbowl' => array(
 221                         '*' => array(
 222                                 'createaccount' => false,
 223                                 'edit' => false,
 224                         ),
 225                 ),
 226                 'private' => array(
 227                         '*' => array(
 228                                 'createaccount' => false,
 229                                 'edit' => false,
 230                                 'read' => false,
 231                         ),
 232                 ),
 233         );
 234
 235         /**
 236          * License types.
 237          *
 238          * @var array
 239          */
 240         public $licenses = array(
 241                 'cc-by-sa' => array(
 242                         'url' => 'http://creativecommons.org/licenses/by-sa/3.0/',
 243                         'icon' => '{$wgStylePath}/common/images/cc-by-sa.png',
 244                 ),
 245                 'cc-by-nc-sa' => array(
 246                         'url' => 'http://creativecommons.org/licenses/by-nc-sa/3.0/',
 247                         'icon' => '{$wgStylePath}/common/images/cc-by-nc-sa.png',
 248                 ),
 249                 'cc-0' => array(
 250                         'url' => 'https://creativecommons.org/publicdomain/zero/1.0/',
 251                         'icon' => '{$wgStylePath}/common/images/cc-0.png',
 252                 ),
 253                 'pd' => array(
 254                         'url' => 'http://creativecommons.org/licenses/publicdomain/',
 255                         'icon' => '{$wgStylePath}/common/images/public-domain.png',
 256                 ),
 257                 'gfdl-old' => array(
 258                         'url' => 'http://www.gnu.org/licenses/old-licenses/fdl-1.2.html',
 259                         'icon' => '{$wgStylePath}/common/images/gnu-fdl.png',
 260                 ),
 261                 'gfdl-current' => array(
 262                         'url' => 'http://www.gnu.org/copyleft/fdl.html',
 263                         'icon' => '{$wgStylePath}/common/images/gnu-fdl.png',
 264                 ),
 265                 'none' => array(
 266                         'url' => '',
 267                         'icon' => '',
 268                         'text' => ''
 269                 ),
 270                 'cc-choose' => array(
 271                         // Details will be filled in by the selector.
 272                         'url' => '',
 273                         'icon' => '',
 274                         'text' => '',
 275                 ),
 276         );
 277
 278         /**
 279          * URL to mediawiki-announce subscription
 280          */
 281         protected $mediaWikiAnnounceUrl = 'https://lists.wikimedia.org/mailman/subscribe/mediawiki-announce';
 282
 283         /**
 284          * Supported language codes for Mailman
 285          */
 286         protected $mediaWikiAnnounceLanguages = array(
 287                 'ca', 'cs', 'da', 'de', 'en', 'es', 'et', 'eu', 'fi', 'fr', 'hr', 'hu',
 288                 'it', 'ja', 'ko', 'lt', 'nl', 'no', 'pl', 'pt', 'pt-br', 'ro', 'ru',
 289                 'sl', 'sr', 'sv', 'tr', 'uk'
 290         );
 291
 292         /**
 293          * UI interface for displaying a short message
 294          * The parameters are like parameters to wfMsg().
 295          * The messages will be in wikitext format, which will be converted to an
 296          * output format such as HTML or text before being sent to the user.
 297          */
 298         public abstract function showMessage( $msg /*, ... */ );
 299
 300         /**
 301          * Same as showMessage(), but for displaying errors
 302          */
 303         public abstract function showError( $msg /*, ... */ );
 304
 305         /**
 306          * Show a message to the installing user by using a Status object
 307          * @param $status Status
 308          */
 309         public abstract function showStatusMessage( Status $status );
 310
 311         /**
 312          * Constructor, always call this from child classes.
 313          */
 314         public function __construct() {
 315                 global $wgExtensionMessagesFiles, $wgUser;
 316
 317                 // Disable the i18n cache and LoadBalancer
 318                 Language::getLocalisationCache()->disableBackend();
 319                 LBFactory::disableBackend();
 320
 321                 // Load the installer's i18n file.
 322                 $wgExtensionMessagesFiles['MediawikiInstaller'] =
 323                         dirname( __FILE__ ) . '/Installer.i18n.php';
 324
 325                 // Having a user with id = 0 safeguards us from DB access via User::loadOptions().
 326                 $wgUser = User::newFromId( 0 );
 327
 328                 $this->settings = $this->internalDefaults;
 329
 330                 foreach ( $this->defaultVarNames as $var ) {
 331                         $this->settings[$var] = $GLOBALS[$var];
 332                 }
 333
 334                 foreach ( self::getDBTypes() as $type ) {
 335                         $installer = $this->getDBInstaller( $type );
 336
 337                         if ( !$installer->isCompiled() ) {
 338                                 continue;
 339                         }
 340
 341                         $defaults = $installer->getGlobalDefaults();
 342
 343                         foreach ( $installer->getGlobalNames() as $var ) {
 344                                 if ( isset( $defaults[$var] ) ) {
 345                                         $this->settings[$var] = $defaults[$var];
 346                                 } else {
 347                                         $this->settings[$var] = $GLOBALS[$var];
 348                                 }
 349                         }
 350                 }
 351
 352                 $this->parserTitle = Title::newFromText( 'Installer' );
 353                 $this->parserOptions = new ParserOptions; // language will  be wrong :(
 354                 $this->parserOptions->setEditSection( false );
 355         }
 356
 357         /**
 358          * Get a list of known DB types.
 359          *
 360          * @return array
 361          */
 362         public static function getDBTypes() {
 363                 return self::$dbTypes;
 364         }
 365
 366         /**
 367          * Do initial checks of the PHP environment. Set variables according to
 368          * the observed environment.
 369          *
 370          * It's possible that this may be called under the CLI SAPI, not the SAPI
 371          * that the wiki will primarily run under. In that case, the subclass should
 372          * initialise variables such as wgScriptPath, before calling this function.
 373          *
 374          * Under the web subclass, it can already be assumed that PHP 5+ is in use
 375          * and that sessions are working.
 376          *
 377          * @return Status
 378          */
 379         public function doEnvironmentChecks() {
 380                 $phpVersion = phpversion();
 381                 if( version_compare( $phpVersion, self::MINIMUM_PHP_VERSION, '>=' ) ) {
 382                         $this->showMessage( 'config-env-php', $phpVersion );
 383                         $good = true;
 384                 } else {
 385                         $this->showMessage( 'config-env-php-toolow', $phpVersion, self::MINIMUM_PHP_VERSION );
 386                         $good = false;
 387                 }
 388
 389                 if( $good ) {
 390                         foreach ( $this->envChecks as $check ) {
 391                                 $status = $this->$check();
 392                                 if ( $status === false ) {
 393                                         $good = false;
 394                                 }
 395                         }
 396                 }
 397
 398                 $this->setVar( '_Environment', $good );
 399
 400                 return $good ? Status::newGood() : Status::newFatal( 'config-env-bad' );
 401         }
 402
 403         /**
 404          * Set a MW configuration variable, or internal installer configuration variable.
 405          *
 406          * @param $name String
 407          * @param $value Mixed
 408          */
 409         public function setVar( $name, $value ) {
 410                 $this->settings[$name] = $value;
 411         }
 412
 413         /**
 414          * Get an MW configuration variable, or internal installer configuration variable.
 415          * The defaults come from $GLOBALS (ultimately DefaultSettings.php).
 416          * Installer variables are typically prefixed by an underscore.
 417          *
 418          * @param $name String
 419          * @param $default Mixed
 420          *
 421          * @return mixed
 422          */
 423         public function getVar( $name, $default = null ) {
 424                 if ( !isset( $this->settings[$name] ) ) {
 425                         return $default;
 426                 } else {
 427                         return $this->settings[$name];
 428                 }
 429         }
 430
 431         /**
 432          * Get an instance of DatabaseInstaller for the specified DB type.
 433          *
 434          * @param $type Mixed: DB installer for which is needed, false to use default.
 435          *
 436          * @return DatabaseInstaller
 437          */
 438         public function getDBInstaller( $type = false ) {
 439                 if ( !$type ) {
 440                         $type = $this->getVar( 'wgDBtype' );
 441                 }
 442
 443                 $type = strtolower( $type );
 444
 445                 if ( !isset( $this->dbInstallers[$type] ) ) {
 446                         $class = ucfirst( $type ). 'Installer';
 447                         $this->dbInstallers[$type] = new $class( $this );
 448                 }
 449
 450                 return $this->dbInstallers[$type];
 451         }
 452
 453         /**
 454          * Determine if LocalSettings.php exists. If it does, return its variables,
 455          * merged with those from AdminSettings.php, as an array.
 456          *
 457          * @return Array
 458          */
 459         public function getExistingLocalSettings() {
 460                 global $IP;
 461
 462                 wfSuppressWarnings();
 463                 $_lsExists = file_exists( "$IP/LocalSettings.php" );
 464                 wfRestoreWarnings();
 465
 466                 if( !$_lsExists ) {
 467                         return false;
 468                 }
 469                 unset($_lsExists);
 470
 471                 require( "$IP/includes/DefaultSettings.php" );
 472                 require( "$IP/LocalSettings.php" );
 473                 if ( file_exists( "$IP/AdminSettings.php" ) ) {
 474                         require( "$IP/AdminSettings.php" );
 475                 }
 476                 return get_defined_vars();
 477         }
 478
 479         /**
 480          * Get a fake password for sending back to the user in HTML.
 481          * This is a security mechanism to avoid compromise of the password in the
 482          * event of session ID compromise.
 483          *
 484          * @param $realPassword String
 485          *
 486          * @return string
 487          */
 488         public function getFakePassword( $realPassword ) {
 489                 return str_repeat( '*', strlen( $realPassword ) );
 490         }
 491
 492         /**
 493          * Set a variable which stores a password, except if the new value is a
 494          * fake password in which case leave it as it is.
 495          *
 496          * @param $name String
 497          * @param $value Mixed
 498          */
 499         public function setPassword( $name, $value ) {
 500                 if ( !preg_match( '/^\*+$/', $value ) ) {
 501                         $this->setVar( $name, $value );
 502                 }
 503         }
 504
 505         /**
 506          * On POSIX systems return the primary group of the webserver we're running under.
 507          * On other systems just returns null.
 508          *
 509          * This is used to advice the user that he should chgrp his mw-config/data/images directory as the
 510          * webserver user before he can install.
 511          *
 512          * Public because SqliteInstaller needs it, and doesn't subclass Installer.
 513          *
 514          * @return mixed
 515          */
 516         public static function maybeGetWebserverPrimaryGroup() {
 517                 if ( !function_exists( 'posix_getegid' ) || !function_exists( 'posix_getpwuid' ) ) {
 518                         # I don't know this, this isn't UNIX.
 519                         return null;
 520                 }
 521
 522                 # posix_getegid() *not* getmygid() because we want the group of the webserver,
 523                 # not whoever owns the current script.
 524                 $gid = posix_getegid();
 525                 $getpwuid = posix_getpwuid( $gid );
 526                 $group = $getpwuid['name'];
 527
 528                 return $group;
 529         }
 530
 531         /**
 532          * Convert wikitext $text to HTML.
 533          *
 534          * This is potentially error prone since many parser features require a complete
 535          * installed MW database. The solution is to just not use those features when you
 536          * write your messages. This appears to work well enough. Basic formatting and
 537          * external links work just fine.
 538          *
 539          * But in case a translator decides to throw in a #ifexist or internal link or
 540          * whatever, this function is guarded to catch the attempted DB access and to present
 541          * some fallback text.
 542          *
 543          * @param $text String
 544          * @param $lineStart Boolean
 545          * @return String
 546          */
 547         public function parse( $text, $lineStart = false ) {
 548                 global $wgParser;
 549
 550                 try {
 551                         $out = $wgParser->parse( $text, $this->parserTitle, $this->parserOptions, $lineStart );
 552                         $html = $out->getText();
 553                 } catch ( DBAccessError $e ) {
 554                         $html = '<!--DB access attempted during parse-->  ' . htmlspecialchars( $text );
 555
 556                         if ( !empty( $this->debug ) ) {
 557                                 $html .= "<!--\n" . $e->getTraceAsString() . "\n-->";
 558                         }
 559                 }
 560
 561                 return $html;
 562         }
 563
 564         /**
 565          * @return ParserOptions
 566          */
 567         public function getParserOptions() {
 568                 return $this->parserOptions;
 569         }
 570
 571         public function disableLinkPopups() {
 572                 $this->parserOptions->setExternalLinkTarget( false );
 573         }
 574
 575         public function restoreLinkPopups() {
 576                 global $wgExternalLinkTarget;
 577                 $this->parserOptions->setExternalLinkTarget( $wgExternalLinkTarget );
 578         }
 579
 580         /**
 581          * Install step which adds a row to the site_stats table with appropriate
 582          * initial values.
 583          *
 584          * @param $installer DatabaseInstaller
 585          *
 586          * @return Status
 587          */
 588         public function populateSiteStats( DatabaseInstaller $installer ) {
 589                 $status = $installer->getConnection();
 590                 if ( !$status->isOK() ) {
 591                         return $status;
 592                 }
 593                 $status->value->insert( 'site_stats', array(
 594                         'ss_row_id' => 1,
 595                         'ss_total_views' => 0,
 596                         'ss_total_edits' => 0,
 597                         'ss_good_articles' => 0,
 598                         'ss_total_pages' => 0,
 599                         'ss_users' => 0,
 600                         'ss_admins' => 0,
 601                         'ss_images' => 0 ),
 602                         __METHOD__, 'IGNORE' );
 603                 return Status::newGood();
 604         }
 605
 606         /**
 607          * Exports all wg* variables stored by the installer into global scope.
 608          */
 609         public function exportVars() {
 610                 foreach ( $this->settings as $name => $value ) {
 611                         if ( substr( $name, 0, 2 ) == 'wg' ) {
 612                                 $GLOBALS[$name] = $value;
 613                         }
 614                 }
 615         }
 616
 617         /**
 618          * Environment check for DB types.
 619          */
 620         protected function envCheckDB() {
 621                 global $wgLang;
 622
 623                 $compiledDBs = array();
 624                 $allNames = array();
 625
 626                 foreach ( self::getDBTypes() as $name ) {
 627                         if ( $this->getDBInstaller( $name )->isCompiled() ) {
 628                                 $compiledDBs[] = $name;
 629                         }
 630                         $allNames[] = wfMsg( 'config-type-' . $name );
 631                 }
 632
 633                 $this->setVar( '_CompiledDBs', $compiledDBs );
 634
 635                 if ( !$compiledDBs ) {
 636                         $this->showError( 'config-no-db', $wgLang->commaList( $allNames ) );
 637                         // FIXME: this only works for the web installer!
 638                         return false;
 639                 }
 640
 641                 // Check for FTS3 full-text search module
 642                 $sqlite = $this->getDBInstaller( 'sqlite' );
 643                 if ( $sqlite->isCompiled() ) {
 644                         if( DatabaseSqlite::getFulltextSearchModule() != 'FTS3' ) {
 645                                 $this->showMessage( 'config-no-fts3' );
 646                         }
 647                 }
 648         }
 649
 650         /**
 651          * Environment check for register_globals.
 652          */
 653         protected function envCheckRegisterGlobals() {
 654                 if( wfIniGetBool( "magic_quotes_runtime" ) ) {
 655                         $this->showMessage( 'config-register-globals' );
 656                 }
 657         }
 658
 659         /**
 660          * Some versions of libxml+PHP break < and > encoding horribly
 661          */
 662         protected function envCheckBrokenXML() {
 663                 $test = new PhpXmlBugTester();
 664                 if ( !$test->ok ) {
 665                         $this->showError( 'config-brokenlibxml' );
 666                         return false;
 667                 }
 668         }
 669
 670         /**
 671          * Test PHP (probably 5.3.1, but it could regress again) to make sure that
 672          * reference parameters to __call() are not converted to null
 673          */
 674         protected function envCheckPHP531() {
 675                 $test = new PhpRefCallBugTester;
 676                 $test->execute();
 677                 if ( !$test->ok ) {
 678                         $this->showError( 'config-using531', phpversion() );
 679                         return false;
 680                 }
 681         }
 682
 683         /**
 684          * Environment check for magic_quotes_runtime.
 685          */
 686         protected function envCheckMagicQuotes() {
 687                 if( wfIniGetBool( "magic_quotes_runtime" ) ) {
 688                         $this->showError( 'config-magic-quotes-runtime' );
 689                         return false;
 690                 }
 691         }
 692
 693         /**
 694          * Environment check for magic_quotes_sybase.
 695          */
 696         protected function envCheckMagicSybase() {
 697                 if ( wfIniGetBool( 'magic_quotes_sybase' ) ) {
 698                         $this->showError( 'config-magic-quotes-sybase' );
 699                         return false;
 700                 }
 701         }
 702
 703         /**
 704          * Environment check for mbstring.func_overload.
 705          */
 706         protected function envCheckMbstring() {
 707                 if ( wfIniGetBool( 'mbstring.func_overload' ) ) {
 708                         $this->showError( 'config-mbstring' );
 709                         return false;
 710                 }
 711         }
 712
 713         /**
 714          * Environment check for zend.ze1_compatibility_mode.
 715          */
 716         protected function envCheckZE1() {
 717                 if ( wfIniGetBool( 'zend.ze1_compatibility_mode' ) ) {
 718                         $this->showError( 'config-ze1' );
 719                         return false;
 720                 }
 721         }
 722
 723         /**
 724          * Environment check for safe_mode.
 725          */
 726         protected function envCheckSafeMode() {
 727                 if ( wfIniGetBool( 'safe_mode' ) ) {
 728                         $this->setVar( '_SafeMode', true );
 729                         $this->showMessage( 'config-safe-mode' );
 730                 }
 731         }
 732
 733         /**
 734          * Environment check for the XML module.
 735          */
 736         protected function envCheckXML() {
 737                 if ( !function_exists( "utf8_encode" ) ) {
 738                         $this->showError( 'config-xml-bad' );
 739                         return false;
 740                 }
 741         }
 742
 743         /**
 744          * Environment check for the PCRE module.
 745          */
 746         protected function envCheckPCRE() {
 747                 if ( !function_exists( 'preg_match' ) ) {
 748                         $this->showError( 'config-pcre' );
 749                         return false;
 750                 }
 751                 wfSuppressWarnings();
 752                 $regexd = preg_replace( '/[\x{0430}-\x{04FF}]/iu', '', '-АБВГД-' );
 753                 wfRestoreWarnings();
 754                 if ( $regexd != '--' ) {
 755                         $this->showError( 'config-pcre-no-utf8' );
 756                         return false;
 757                 }
 758         }
 759
 760         /**
 761          * Environment check for available memory.
 762          */
 763         protected function envCheckMemory() {
 764                 $limit = ini_get( 'memory_limit' );
 765
 766                 if ( !$limit || $limit == -1 ) {
 767                         return true;
 768                 }
 769
 770                 $n = wfShorthandToInteger( $limit );
 771
 772                 if( $n < $this->minMemorySize * 1024 * 1024 ) {
 773                         $newLimit = "{$this->minMemorySize}M";
 774
 775                         if( ini_set( "memory_limit", $newLimit ) === false ) {
 776                                 $this->showMessage( 'config-memory-bad', $limit );
 777                         } else {
 778                                 $this->showMessage( 'config-memory-raised', $limit, $newLimit );
 779                                 $this->setVar( '_RaiseMemory', true );
 780                         }
 781                 } else {
 782                         return true;
 783                 }
 784         }
 785
 786         /**
 787          * Environment check for compiled object cache types.
 788          */
 789         protected function envCheckCache() {
 790                 $caches = array();
 791                 foreach ( $this->objectCaches as $name => $function ) {
 792                         if ( function_exists( $function ) ) {
 793                                 $caches[$name] = true;
 794                         }
 795                 }
 796
 797                 if ( !$caches ) {
 798                         $this->showMessage( 'config-no-cache' );
 799                 }
 800
 801                 $this->setVar( '_Caches', $caches );
 802         }
 803
 804         /**
 805          * Search for GNU diff3.
 806          */
 807         protected function envCheckDiff3() {
 808                 $names = array( "gdiff3", "diff3", "diff3.exe" );
 809                 $versionInfo = array( '$1 --version 2>&1', 'GNU diffutils' );
 810
 811                 $diff3 = self::locateExecutableInDefaultPaths( $names, $versionInfo );
 812
 813                 if ( $diff3 ) {
 814                         $this->setVar( 'wgDiff3', $diff3 );
 815                 } else {
 816                         $this->setVar( 'wgDiff3', false );
 817                         $this->showMessage( 'config-diff3-bad' );
 818                 }
 819         }
 820
 821         /**
 822          * Environment check for ImageMagick and GD.
 823          */
 824         protected function envCheckGraphics() {
 825                 $names = array( wfIsWindows() ? 'convert.exe' : 'convert' );
 826                 $convert = self::locateExecutableInDefaultPaths( $names, array( '$1 -version', 'ImageMagick' ) );
 827
 828                 $this->setVar( 'wgImageMagickConvertCommand', '' );
 829                 if ( $convert ) {
 830                         $this->setVar( 'wgImageMagickConvertCommand', $convert );
 831                         $this->showMessage( 'config-imagemagick', $convert );
 832                         return true;
 833                 } elseif ( function_exists( 'imagejpeg' ) ) {
 834                         $this->showMessage( 'config-gd' );
 835                         return true;
 836                 } else {
 837                         $this->showMessage( 'config-no-scaling' );
 838                 }
 839         }
 840
 841         /**
 842          * Environment check for setting $IP and $wgScriptPath.
 843          */
 844         protected function envCheckPath() {
 845                 global $IP;
 846                 $IP = dirname( dirname( dirname( __FILE__ ) ) );
 847
 848                 $this->setVar( 'IP', $IP );
 849
 850                 // PHP_SELF isn't available sometimes, such as when PHP is CGI but
 851                 // cgi.fix_pathinfo is disabled. In that case, fall back to SCRIPT_NAME
 852                 // to get the path to the current script... hopefully it's reliable. SIGH
 853                 if ( !empty( $_SERVER['PHP_SELF'] ) ) {
 854                         $path = $_SERVER['PHP_SELF'];
 855                 } elseif ( !empty( $_SERVER['SCRIPT_NAME'] ) ) {
 856                         $path = $_SERVER['SCRIPT_NAME'];
 857                 } elseif ( $this->getVar( 'wgScriptPath' ) ) {
 858                         // Some kind soul has set it for us already (e.g. debconf)
 859                         return true;
 860                 } else {
 861                         $this->showError( 'config-no-uri' );
 862                         return false;
 863                 }
 864
 865                 $uri = preg_replace( '{^(.*)/(mw-)?config.*$}', '$1', $path );
 866                 $this->setVar( 'wgScriptPath', $uri );
 867         }
 868
 869         /**
 870          * Environment check for setting the preferred PHP file extension.
 871          */
 872         protected function envCheckExtension() {
 873                 // FIXME: detect this properly
 874                 if ( defined( 'MW_INSTALL_PHP5_EXT' ) ) {
 875                         $ext = 'php5';
 876                 } else {
 877                         $ext = 'php';
 878                 }
 879                 $this->setVar( 'wgScriptExtension', ".$ext" );
 880         }
 881
 882         /**
 883          * TODO: document
 884          */
 885         protected function envCheckShellLocale() {
 886                 $os = php_uname( 's' );
 887                 $supported = array( 'Linux', 'SunOS', 'HP-UX', 'Darwin' ); # Tested these
 888
 889                 if ( !in_array( $os, $supported ) ) {
 890                         return true;
 891                 }
 892
 893                 # Get a list of available locales.
 894                 $ret = false;
 895                 $lines = wfShellExec( '/usr/bin/locale -a', $ret );
 896
 897                 if ( $ret ) {
 898                         return true;
 899                 }
 900
 901                 $lines = wfArrayMap( 'trim', explode( "\n", $lines ) );
 902                 $candidatesByLocale = array();
 903                 $candidatesByLang = array();
 904
 905                 foreach ( $lines as $line ) {
 906                         if ( $line === '' ) {
 907                                 continue;
 908                         }
 909
 910                         if ( !preg_match( '/^([a-zA-Z]+)(_[a-zA-Z]+|)\.(utf8|UTF-8)(@[a-zA-Z_]*|)$/i', $line, $m ) ) {
 911                                 continue;
 912                         }
 913
 914                         list( $all, $lang, $territory, $charset, $modifier ) = $m;
 915
 916                         $candidatesByLocale[$m[0]] = $m;
 917                         $candidatesByLang[$lang][] = $m;
 918                 }
 919
 920                 # Try the current value of LANG.
 921                 if ( isset( $candidatesByLocale[ getenv( 'LANG' ) ] ) ) {
 922                         $this->setVar( 'wgShellLocale', getenv( 'LANG' ) );
 923                         return true;
 924                 }
 925
 926                 # Try the most common ones.
 927                 $commonLocales = array( 'en_US.UTF-8', 'en_US.utf8', 'de_DE.UTF-8', 'de_DE.utf8' );
 928                 foreach ( $commonLocales as $commonLocale ) {
 929                         if ( isset( $candidatesByLocale[$commonLocale] ) ) {
 930                                 $this->setVar( 'wgShellLocale', $commonLocale );
 931                                 return true;
 932                         }
 933                 }
 934
 935                 # Is there an available locale in the Wiki's language?
 936                 $wikiLang = $this->getVar( 'wgLanguageCode' );
 937
 938                 if ( isset( $candidatesByLang[$wikiLang] ) ) {
 939                         $m = reset( $candidatesByLang[$wikiLang] );
 940                         $this->setVar( 'wgShellLocale', $m[0] );
 941                         return true;
 942                 }
 943
 944                 # Are there any at all?
 945                 if ( count( $candidatesByLocale ) ) {
 946                         $m = reset( $candidatesByLocale );
 947                         $this->setVar( 'wgShellLocale', $m[0] );
 948                         return true;
 949                 }
 950
 951                 # Give up.
 952                 return true;
 953         }
 954
 955         /**
 956          * TODO: document
 957          */
 958         protected function envCheckUploadsDirectory() {
 959                 global $IP, $wgServer;
 960
 961                 $dir = $IP . '/images/';
 962                 $url = $wgServer . $this->getVar( 'wgScriptPath' ) . '/images/';
 963                 $safe = !$this->dirIsExecutable( $dir, $url );
 964
 965                 if ( $safe ) {
 966                         return true;
 967                 } else {
 968                         $this->showMessage( 'config-uploads-not-safe', $dir );
 969                 }
 970         }
 971
 972         /**
 973          * Checks if suhosin.get.max_value_length is set, and if so, sets
 974          * $wgResourceLoaderMaxQueryLength to that value in the generated
 975          * LocalSettings file
 976          */
 977         protected function envCheckSuhosinMaxValueLength() {
 978                 $maxValueLength = ini_get( 'suhosin.get.max_value_length' );
 979                 if ( $maxValueLength > 0 ) {
 980                         $this->showMessage( 'config-suhosin-max-value-length', $maxValueLength );
 981                 } else {
 982                         $maxValueLength = -1;
 983                 }
 984                 $this->setVar( 'wgResourceLoaderMaxQueryLength', $maxValueLength );
 985         }
 986
 987         /**
 988          * Convert a hex string representing a Unicode code point to that code point.
 989          * @param $c String
 990          * @return string
 991          */
 992         protected function unicodeChar( $c ) {
 993                 $c = hexdec($c);
 994                 if ($c <= 0x7F) {
 995                         return chr($c);
 996                 } else if ($c <= 0x7FF) {
 997                         return chr(0xC0 | $c >> 6) . chr(0x80 | $c & 0x3F);
 998                 } else if ($c <= 0xFFFF) {
 999                         return chr(0xE0 | $c >> 12) . chr(0x80 | $c >> 6 & 0x3F)
1000                                 . chr(0x80 | $c & 0x3F);
1001                 } else if ($c <= 0x10FFFF) {
1002                         return chr(0xF0 | $c >> 18) . chr(0x80 | $c >> 12 & 0x3F)
1003                                 . chr(0x80 | $c >> 6 & 0x3F)
1004                                 . chr(0x80 | $c & 0x3F);
1005                 } else {
1006                         return false;
1007                 }
1008         }
1009
1010
1011         /**
1012          * Check the libicu version
1013          */
1014         protected function envCheckLibicu() {
1015                 $utf8 = function_exists( 'utf8_normalize' );
1016                 $intl = function_exists( 'normalizer_normalize' );
1017
1018                 /**
1019                  * This needs to be updated something that the latest libicu
1020                  * will properly normalize.  This normalization was found at
1021                  * http://www.unicode.org/versions/Unicode5.2.0/#Character_Additions
1022                  * Note that we use the hex representation to create the code
1023                  * points in order to avoid any Unicode-destroying during transit.
1024                  */
1025                 $not_normal_c = $this->unicodeChar("FA6C");
1026                 $normal_c = $this->unicodeChar("242EE");
1027
1028                 $useNormalizer = 'php';
1029                 $needsUpdate = false;
1030
1031                 /**
1032                  * We're going to prefer the pecl extension here unless
1033                  * utf8_normalize is more up to date.
1034                  */
1035                 if( $utf8 ) {
1036                         $useNormalizer = 'utf8';
1037                         $utf8 = utf8_normalize( $not_normal_c, UNORM_NFC );
1038                         if ( $utf8 !== $normal_c ) $needsUpdate = true;
1039                 }
1040                 if( $intl ) {
1041                         $useNormalizer = 'intl';
1042                         $intl = normalizer_normalize( $not_normal_c, Normalizer::FORM_C );
1043                         if ( $intl !== $normal_c ) $needsUpdate = true;
1044                 }
1045
1046                 // Uses messages 'config-unicode-using-php', 'config-unicode-using-utf8', 'config-unicode-using-intl'
1047                 if( $useNormalizer === 'php' ) {
1048                         $this->showMessage( 'config-unicode-pure-php-warning' );
1049                 } else {
1050                         $this->showMessage( 'config-unicode-using-' . $useNormalizer );
1051                         if( $needsUpdate ) {
1052                                 $this->showMessage( 'config-unicode-update-warning' );
1053                         }
1054                 }
1055         }
1056
1057         /**
1058          * Get an array of likely places we can find executables. Check a bunch
1059          * of known Unix-like defaults, as well as the PATH environment variable
1060          * (which should maybe make it work for Windows?)
1061          *
1062          * @return Array
1063          */
1064         protected static function getPossibleBinPaths() {
1065                 return array_merge(
1066                         array( '/usr/bin', '/usr/local/bin', '/opt/csw/bin',
1067                                 '/usr/gnu/bin', '/usr/sfw/bin', '/sw/bin', '/opt/local/bin' ),
1068                         explode( PATH_SEPARATOR, getenv( 'PATH' ) )
1069                 );
1070         }
1071
1072         /**
1073          * Search a path for any of the given executable names. Returns the
1074          * executable name if found. Also checks the version string returned
1075          * by each executable.
1076          *
1077          * Used only by environment checks.
1078          *
1079          * @param $path String: path to search
1080          * @param $names Array of executable names
1081          * @param $versionInfo Boolean false or array with two members:
1082          *               0 => Command to run for version check, with $1 for the full executable name
1083          *               1 => String to compare the output with
1084          *
1085          * If $versionInfo is not false, only executables with a version
1086          * matching $versionInfo[1] will be returned.
1087          */
1088         public static function locateExecutable( $path, $names, $versionInfo = false ) {
1089                 if ( !is_array( $names ) ) {
1090                         $names = array( $names );
1091                 }
1092
1093                 foreach ( $names as $name ) {
1094                         $command = $path . DIRECTORY_SEPARATOR . $name;
1095
1096                         wfSuppressWarnings();
1097                         $file_exists = file_exists( $command );
1098                         wfRestoreWarnings();
1099
1100                         if ( $file_exists ) {
1101                                 if ( !$versionInfo ) {
1102                                         return $command;
1103                                 }
1104
1105                                 $file = str_replace( '$1', wfEscapeShellArg( $command ), $versionInfo[0] );
1106                                 if ( strstr( wfShellExec( $file ), $versionInfo[1] ) !== false ) {
1107                                         return $command;
1108                                 }
1109                         }
1110                 }
1111                 return false;
1112         }
1113
1114         /**
1115          * Same as locateExecutable(), but checks in getPossibleBinPaths() by default
1116          * @see locateExecutable()
1117          */
1118         public static function locateExecutableInDefaultPaths( $names, $versionInfo = false ) {
1119                 foreach( self::getPossibleBinPaths() as $path ) {
1120                         $exe = self::locateExecutable( $path, $names, $versionInfo );
1121                         if( $exe !== false ) {
1122                                 return $exe;
1123                         }
1124                 }
1125                 return false;
1126         }
1127
1128         /**
1129          * Checks if scripts located in the given directory can be executed via the given URL.
1130          *
1131          * Used only by environment checks.
1132          */
1133         public function dirIsExecutable( $dir, $url ) {
1134                 $scriptTypes = array(
1135                         'php' => array(
1136                                 "<?php echo 'ex' . 'ec';",
1137                                 "#!/var/env php5\n<?php echo 'ex' . 'ec';",
1138                         ),
1139                 );
1140
1141                 // it would be good to check other popular languages here, but it'll be slow.
1142
1143                 wfSuppressWarnings();
1144
1145                 foreach ( $scriptTypes as $ext => $contents ) {
1146                         foreach ( $contents as $source ) {
1147                                 $file = 'exectest.' . $ext;
1148
1149                                 if ( !file_put_contents( $dir . $file, $source ) ) {
1150                                         break;
1151                                 }
1152
1153                                 $text = Http::get( $url . $file, array( 'timeout' => 3 ) );
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         public function setParserLanguage( $lang ) {
1172                 $this->parserOptions->setTargetLanguage( $lang );
1173                 $this->parserOptions->setUserLang( $lang->getCode() );
1174         }
1175
1176         /**
1177          * Overridden by WebInstaller to provide lastPage parameters.
1178          */
1179         protected function getDocUrl( $page ) {
1180                 return "{$_SERVER['PHP_SELF']}?page=" . urlencode( $page );
1181         }
1182
1183         /**
1184          * Finds extensions that follow the format /extensions/Name/Name.php,
1185          * and returns an array containing the value for 'Name' for each found extension.
1186          *
1187          * @return array
1188          */
1189         public function findExtensions() {
1190                 if( $this->getVar( 'IP' ) === null ) {
1191                         return false;
1192                 }
1193
1194                 $exts = array();
1195                 $dir = $this->getVar( 'IP' ) . '/extensions';
1196                 $dh = opendir( $dir );
1197
1198                 while ( ( $file = readdir( $dh ) ) !== false ) {
1199                         if( file_exists( "$dir/$file/$file.php" ) ) {
1200                                 $exts[] = $file;
1201                         }
1202                 }
1203
1204                 return $exts;
1205         }
1206
1207         /**
1208          * Installs the auto-detected extensions.
1209          *
1210          * @return Status
1211          */
1212         protected function includeExtensions() {
1213                 global $IP;
1214                 $exts = $this->getVar( '_Extensions' );
1215                 $IP = $this->getVar( 'IP' );
1216                 $path = $IP . '/extensions';
1217
1218                 /**
1219                  * We need to include DefaultSettings before including extensions to avoid
1220                  * warnings about unset variables. However, the only thing we really
1221                  * want here is $wgHooks['LoadExtensionSchemaUpdates']. This won't work
1222                  * if the extension has hidden hook registration in $wgExtensionFunctions,
1223                  * but we're not opening that can of worms
1224                  * @see https://bugzilla.wikimedia.org/show_bug.cgi?id=26857
1225                  */
1226                 global $wgAutoloadClasses;
1227                 $wgAutoloadClasses = array();
1228
1229                 require( "$IP/includes/DefaultSettings.php" );
1230
1231                 foreach( $exts as $e ) {
1232                         require_once( "$path/$e/$e.php" );
1233                 }
1234
1235                 $hooksWeWant = isset( $wgHooks['LoadExtensionSchemaUpdates'] ) ?
1236                         $wgHooks['LoadExtensionSchemaUpdates'] : array();
1237
1238                 // Unset everyone else's hooks. Lord knows what someone might be doing
1239                 // in ParserFirstCallInit (see bug 27171)
1240                 $GLOBALS['wgHooks'] = array( 'LoadExtensionSchemaUpdates' => $hooksWeWant );
1241
1242                 return Status::newGood();
1243         }
1244
1245         /**
1246          * Get an array of install steps. Should always be in the format of
1247          * array(
1248          *   'name'     => 'someuniquename',
1249          *   'callback' => array( $obj, 'method' ),
1250          * )
1251          * There must be a config-install-$name message defined per step, which will
1252          * be shown on install.
1253          *
1254          * @param $installer DatabaseInstaller so we can make callbacks
1255          * @return array
1256          */
1257         protected function getInstallSteps( DatabaseInstaller $installer ) {
1258                 $coreInstallSteps = array(
1259                         array( 'name' => 'database',   'callback' => array( $installer, 'setupDatabase' ) ),
1260                         array( 'name' => 'tables',     'callback' => array( $installer, 'createTables' ) ),
1261                         array( 'name' => 'interwiki',  'callback' => array( $installer, 'populateInterwikiTable' ) ),
1262                         array( 'name' => 'stats',      'callback' => array( $this, 'populateSiteStats' ) ),
1263                         array( 'name' => 'keys',       'callback' => array( $this, 'generateKeys' ) ),
1264                         array( 'name' => 'sysop',      'callback' => array( $this, 'createSysop' ) ),
1265                         array( 'name' => 'mainpage',   'callback' => array( $this, 'createMainpage' ) ),
1266                 );
1267
1268                 // Build the array of install steps starting from the core install list,
1269                 // then adding any callbacks that wanted to attach after a given step
1270                 foreach( $coreInstallSteps as $step ) {
1271                         $this->installSteps[] = $step;
1272                         if( isset( $this->extraInstallSteps[ $step['name'] ] ) ) {
1273                                 $this->installSteps = array_merge(
1274                                         $this->installSteps,
1275                                         $this->extraInstallSteps[ $step['name'] ]
1276                                 );
1277                         }
1278                 }
1279
1280                 // Prepend any steps that want to be at the beginning
1281                 if( isset( $this->extraInstallSteps['BEGINNING'] ) ) {
1282                         $this->installSteps = array_merge(
1283                                 $this->extraInstallSteps['BEGINNING'],
1284                                 $this->installSteps
1285                         );
1286                 }
1287
1288                 // Extensions should always go first, chance to tie into hooks and such
1289                 if( count( $this->getVar( '_Extensions' ) ) ) {
1290                         array_unshift( $this->installSteps,
1291                                 array( 'name' => 'extensions', 'callback' => array( $this, 'includeExtensions' ) )
1292                         );
1293                         $this->installSteps[] = array(
1294                                 'name' => 'extension-tables',
1295                                 'callback' => array( $installer, 'createExtensionTables' )
1296                         );
1297                 }
1298                 return $this->installSteps;
1299         }
1300
1301         /**
1302          * Actually perform the installation.
1303          *
1304          * @param $startCB Array A callback array for the beginning of each step
1305          * @param $endCB Array A callback array for the end of each step
1306          *
1307          * @return Array of Status objects
1308          */
1309         public function performInstallation( $startCB, $endCB ) {
1310                 $installResults = array();
1311                 $installer = $this->getDBInstaller();
1312                 $installer->preInstall();
1313                 $steps = $this->getInstallSteps( $installer );
1314                 foreach( $steps as $stepObj ) {
1315                         $name = $stepObj['name'];
1316                         call_user_func_array( $startCB, array( $name ) );
1317
1318                         // Perform the callback step
1319                         $status = call_user_func( $stepObj['callback'], $installer );
1320
1321                         // Output and save the results
1322                         call_user_func( $endCB, $name, $status );
1323                         $installResults[$name] = $status;
1324
1325                         // If we've hit some sort of fatal, we need to bail.
1326                         // Callback already had a chance to do output above.
1327                         if( !$status->isOk() ) {
1328                                 break;
1329                         }
1330                 }
1331                 if( $status->isOk() ) {
1332                         $this->setVar( '_InstallDone', true );
1333                 }
1334                 return $installResults;
1335         }
1336
1337         /**
1338          * Generate $wgSecretKey. Will warn if we had to use mt_rand() instead of
1339          * /dev/urandom
1340          *
1341          * @return Status
1342          */
1343         public function generateKeys() {
1344                 $keys = array( 'wgSecretKey' => 64 );
1345                 if ( strval( $this->getVar( 'wgUpgradeKey' ) ) === '' ) {
1346                         $keys['wgUpgradeKey'] = 16;
1347                 }
1348                 return $this->doGenerateKeys( $keys );
1349         }
1350
1351         /**
1352          * Generate a secret value for variables using either
1353          * /dev/urandom or mt_rand(). Produce a warning in the later case.
1354          *
1355          * @param $keys Array
1356          * @return Status
1357          */
1358         protected function doGenerateKeys( $keys ) {
1359                 $status = Status::newGood();
1360
1361                 wfSuppressWarnings();
1362                 $file = fopen( "/dev/urandom", "r" );
1363                 wfRestoreWarnings();
1364
1365                 foreach ( $keys as $name => $length ) {
1366                         if ( $file ) {
1367                                         $secretKey = bin2hex( fread( $file, $length / 2 ) );
1368                         } else {
1369                                 $secretKey = '';
1370
1371                                 for ( $i = 0; $i < $length / 8; $i++ ) {
1372                                         $secretKey .= dechex( mt_rand( 0, 0x7fffffff ) );
1373                                 }
1374                         }
1375
1376                         $this->setVar( $name, $secretKey );
1377                 }
1378
1379                 if ( $file ) {
1380                         fclose( $file );
1381                 } else {
1382                         $names = array_keys ( $keys );
1383                         $names = preg_replace( '/^(.*)$/', '\$$1', $names );
1384                         global $wgLang;
1385                         $status->warning( 'config-insecure-keys', $wgLang->listToText( $names ), count( $names ) );
1386                 }
1387
1388                 return $status;
1389         }
1390
1391         /**
1392          * Create the first user account, grant it sysop and bureaucrat rights
1393          *
1394          * @return Status
1395          */
1396         protected function createSysop() {
1397                 $name = $this->getVar( '_AdminName' );
1398                 $user = User::newFromName( $name );
1399
1400                 if ( !$user ) {
1401                         // We should've validated this earlier anyway!
1402                         return Status::newFatal( 'config-admin-error-user', $name );
1403                 }
1404
1405                 if ( $user->idForName() == 0 ) {
1406                         $user->addToDatabase();
1407
1408                         try {
1409                                 $user->setPassword( $this->getVar( '_AdminPassword' ) );
1410                         } catch( PasswordError $pwe ) {
1411                                 return Status::newFatal( 'config-admin-error-password', $name, $pwe->getMessage() );
1412                         }
1413
1414                         $user->addGroup( 'sysop' );
1415                         $user->addGroup( 'bureaucrat' );
1416                         if( $this->getVar( '_AdminEmail' ) ) {
1417                                 $user->setEmail( $this->getVar( '_AdminEmail' ) );
1418                         }
1419                         $user->saveSettings();
1420
1421                         // Update user count
1422                         $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
1423                         $ssUpdate->doUpdate();
1424                 }
1425                 $status = Status::newGood();
1426
1427                 if( $this->getVar( '_Subscribe' ) && $this->getVar( '_AdminEmail' ) ) {
1428                         $this->subscribeToMediaWikiAnnounce( $status );
1429                 }
1430
1431                 return $status;
1432         }
1433
1434         private function subscribeToMediaWikiAnnounce( Status $s ) {
1435                 $params = array(
1436                         'email'    => $this->getVar( '_AdminEmail' ),
1437                         'language' => 'en',
1438                         'digest'   => 0
1439                 );
1440
1441                 // Mailman doesn't support as many languages as we do, so check to make
1442                 // sure their selected language is available
1443                 $myLang = $this->getVar( '_UserLang' );
1444                 if( in_array( $myLang, $this->mediaWikiAnnounceLanguages ) ) {
1445                         $myLang = $myLang == 'pt-br' ? 'pt_BR' : $myLang; // rewrite to Mailman's pt_BR
1446                         $params['language'] = $myLang;
1447                 }
1448
1449                 $res = Http::post( $this->mediaWikiAnnounceUrl, array( 'postData' => $params ) );
1450                 if( !$res ) {
1451                         $s->warning( 'config-install-subscribe-fail' );
1452                 }
1453         }
1454
1455         /**
1456          * Insert Main Page with default content.
1457          *
1458          * @return Status
1459          */
1460         protected function createMainpage( DatabaseInstaller $installer ) {
1461                 $status = Status::newGood();
1462                 try {
1463                         $article = new Article( Title::newMainPage() );
1464                         $article->doEdit( wfMsgForContent( 'mainpagetext' ) . "\n\n" .
1465                                                                 wfMsgForContent( 'mainpagedocfooter' ),
1466                                                                 '',
1467                                                                 EDIT_NEW,
1468                                                                 false,
1469                                                                 User::newFromName( 'MediaWiki default' ) );
1470                 } catch (MWException $e) {
1471                         //using raw, because $wgShowExceptionDetails can not be set yet
1472                         $status->fatal( 'config-install-mainpage-failed', $e->getMessage() );
1473                 }
1474
1475                 return $status;
1476         }
1477
1478         /**
1479          * Override the necessary bits of the config to run an installation.
1480          */
1481         public static function overrideConfig() {
1482                 define( 'MW_NO_SESSION', 1 );
1483
1484                 // Don't access the database
1485                 $GLOBALS['wgUseDatabaseMessages'] = false;
1486                 // Debug-friendly
1487                 $GLOBALS['wgShowExceptionDetails'] = true;
1488                 // Don't break forms
1489                 $GLOBALS['wgExternalLinkTarget'] = '_blank';
1490
1491                 // Extended debugging
1492                 $GLOBALS['wgShowSQLErrors'] = true;
1493                 $GLOBALS['wgShowDBErrorBacktrace'] = true;
1494
1495                 // Allow multiple ob_flush() calls
1496                 $GLOBALS['wgDisableOutputCompression'] = true;
1497
1498                 // Use a sensible cookie prefix (not my_wiki)
1499                 $GLOBALS['wgCookiePrefix'] = 'mw_installer';
1500
1501                 // Some of the environment checks make shell requests, remove limits
1502                 $GLOBALS['wgMaxShellMemory'] = 0;
1503         }
1504
1505         /**
1506          * Add an installation step following the given step.
1507          *
1508          * @param $callback Array A valid installation callback array, in this form:
1509          *    array( 'name' => 'some-unique-name', 'callback' => array( $obj, 'function' ) );
1510          * @param $findStep String the step to find. Omit to put the step at the beginning
1511          */
1512         public function addInstallStep( $callback, $findStep = 'BEGINNING' ) {
1513                 $this->extraInstallSteps[$findStep][] = $callback;
1514         }
1515 }