includes/installer/Installer.php

   1 <?php
   2 /**
   3  * Base code for MediaWiki installer.
   4  *
   5  * DO NOT PATCH THIS FILE IF YOU NEED TO CHANGE INSTALLER BEHAVIOR IN YOUR PACKAGE!
   6  * See mw-config/overrides/README for details.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  21  * http://www.gnu.org/copyleft/gpl.html
  22  *
  23  * @file
  24  * @ingroup Deployment
  25  */
  26 use MediaWiki\MediaWikiServices;
  27
  28 /**
  29  * This documentation group collects source code files with deployment functionality.
  30  *
  31  * @defgroup Deployment Deployment
  32  */
  33
  34 /**
  35  * Base installer class.
  36  *
  37  * This class provides the base for installation and update functionality
  38  * for both MediaWiki core and extensions.
  39  *
  40  * @ingroup Deployment
  41  * @since 1.17
  42  */
  43 abstract class Installer {
  44
  45         /**
  46          * The oldest version of PCRE we can support.
  47          *
  48          * Defining this is necessary because PHP may be linked with a system version
  49          * of PCRE, which may be older than that bundled with the minimum PHP version.
  50          */
  51         const MINIMUM_PCRE_VERSION = '7.2';
  52
  53         /**
  54          * @var array
  55          */
  56         protected $settings;
  57
  58         /**
  59          * List of detected DBs, access using getCompiledDBs().
  60          *
  61          * @var array
  62          */
  63         protected $compiledDBs;
  64
  65         /**
  66          * Cached DB installer instances, access using getDBInstaller().
  67          *
  68          * @var array
  69          */
  70         protected $dbInstallers = [];
  71
  72         /**
  73          * Minimum memory size in MB.
  74          *
  75          * @var int
  76          */
  77         protected $minMemorySize = 50;
  78
  79         /**
  80          * Cached Title, used by parse().
  81          *
  82          * @var Title
  83          */
  84         protected $parserTitle;
  85
  86         /**
  87          * Cached ParserOptions, used by parse().
  88          *
  89          * @var ParserOptions
  90          */
  91         protected $parserOptions;
  92
  93         /**
  94          * Known database types. These correspond to the class names <type>Installer,
  95          * and are also MediaWiki database types valid for $wgDBtype.
  96          *
  97          * To add a new type, create a <type>Installer class and a Database<type>
  98          * class, and add a config-type-<type> message to MessagesEn.php.
  99          *
 100          * @var array
 101          */
 102         protected static $dbTypes = [
 103                 'mysql',
 104                 'postgres',
 105                 'oracle',
 106                 'mssql',
 107                 'sqlite',
 108         ];
 109
 110         /**
 111          * A list of environment check methods called by doEnvironmentChecks().
 112          * These may output warnings using showMessage(), and/or abort the
 113          * installation process by returning false.
 114          *
 115          * For the WebInstaller these are only called on the Welcome page,
 116          * if these methods have side-effects that should affect later page loads
 117          * (as well as the generated stylesheet), use envPreps instead.
 118          *
 119          * @var array
 120          */
 121         protected $envChecks = [
 122                 'envCheckDB',
 123                 'envCheckBrokenXML',
 124                 'envCheckPCRE',
 125                 'envCheckMemory',
 126                 'envCheckCache',
 127                 'envCheckModSecurity',
 128                 'envCheckDiff3',
 129                 'envCheckGraphics',
 130                 'envCheckGit',
 131                 'envCheckServer',
 132                 'envCheckPath',
 133                 'envCheckShellLocale',
 134                 'envCheckUploadsDirectory',
 135                 'envCheckLibicu',
 136                 'envCheckSuhosinMaxValueLength',
 137         ];
 138
 139         /**
 140          * A list of environment preparation methods called by doEnvironmentPreps().
 141          *
 142          * @var array
 143          */
 144         protected $envPreps = [
 145                 'envPrepServer',
 146                 'envPrepPath',
 147         ];
 148
 149         /**
 150          * MediaWiki configuration globals that will eventually be passed through
 151          * to LocalSettings.php. The names only are given here, the defaults
 152          * typically come from DefaultSettings.php.
 153          *
 154          * @var array
 155          */
 156         protected $defaultVarNames = [
 157                 'wgSitename',
 158                 'wgPasswordSender',
 159                 'wgLanguageCode',
 160                 'wgRightsIcon',
 161                 'wgRightsText',
 162                 'wgRightsUrl',
 163                 'wgEnableEmail',
 164                 'wgEnableUserEmail',
 165                 'wgEnotifUserTalk',
 166                 'wgEnotifWatchlist',
 167                 'wgEmailAuthentication',
 168                 'wgDBname',
 169                 'wgDBtype',
 170                 'wgDiff3',
 171                 'wgImageMagickConvertCommand',
 172                 'wgGitBin',
 173                 'IP',
 174                 'wgScriptPath',
 175                 'wgMetaNamespace',
 176                 'wgDeletedDirectory',
 177                 'wgEnableUploads',
 178                 'wgShellLocale',
 179                 'wgSecretKey',
 180                 'wgUseInstantCommons',
 181                 'wgUpgradeKey',
 182                 'wgDefaultSkin',
 183         ];
 184
 185         /**
 186          * Variables that are stored alongside globals, and are used for any
 187          * configuration of the installation process aside from the MediaWiki
 188          * configuration. Map of names to defaults.
 189          *
 190          * @var array
 191          */
 192         protected $internalDefaults = [
 193                 '_UserLang' => 'en',
 194                 '_Environment' => false,
 195                 '_RaiseMemory' => false,
 196                 '_UpgradeDone' => false,
 197                 '_InstallDone' => false,
 198                 '_Caches' => [],
 199                 '_InstallPassword' => '',
 200                 '_SameAccount' => true,
 201                 '_CreateDBAccount' => false,
 202                 '_NamespaceType' => 'site-name',
 203                 '_AdminName' => '', // will be set later, when the user selects language
 204                 '_AdminPassword' => '',
 205                 '_AdminPasswordConfirm' => '',
 206                 '_AdminEmail' => '',
 207                 '_Subscribe' => false,
 208                 '_SkipOptional' => 'continue',
 209                 '_RightsProfile' => 'wiki',
 210                 '_LicenseCode' => 'none',
 211                 '_CCDone' => false,
 212                 '_Extensions' => [],
 213                 '_Skins' => [],
 214                 '_MemCachedServers' => '',
 215                 '_UpgradeKeySupplied' => false,
 216                 '_ExistingDBSettings' => false,
 217
 218                 // $wgLogo is probably wrong (bug 48084); set something that will work.
 219                 // Single quotes work fine here, as LocalSettingsGenerator outputs this unescaped.
 220                 'wgLogo' => '$wgResourceBasePath/resources/assets/wiki.png',
 221                 'wgAuthenticationTokenVersion' => 1,
 222         ];
 223
 224         /**
 225          * The actual list of installation steps. This will be initialized by getInstallSteps()
 226          *
 227          * @var array
 228          */
 229         private $installSteps = [];
 230
 231         /**
 232          * Extra steps for installation, for things like DatabaseInstallers to modify
 233          *
 234          * @var array
 235          */
 236         protected $extraInstallSteps = [];
 237
 238         /**
 239          * Known object cache types and the functions used to test for their existence.
 240          *
 241          * @var array
 242          */
 243         protected $objectCaches = [
 244                 'xcache' => 'xcache_get',
 245                 'apc' => 'apc_fetch',
 246                 'wincache' => 'wincache_ucache_get'
 247         ];
 248
 249         /**
 250          * User rights profiles.
 251          *
 252          * @var array
 253          */
 254         public $rightsProfiles = [
 255                 'wiki' => [],
 256                 'no-anon' => [
 257                         '*' => [ 'edit' => false ]
 258                 ],
 259                 'fishbowl' => [
 260                         '*' => [
 261                                 'createaccount' => false,
 262                                 'edit' => false,
 263                         ],
 264                 ],
 265                 'private' => [
 266                         '*' => [
 267                                 'createaccount' => false,
 268                                 'edit' => false,
 269                                 'read' => false,
 270                         ],
 271                 ],
 272         ];
 273
 274         /**
 275          * License types.
 276          *
 277          * @var array
 278          */
 279         public $licenses = [
 280                 'cc-by' => [
 281                         'url' => 'https://creativecommons.org/licenses/by/4.0/',
 282                         'icon' => '$wgResourceBasePath/resources/assets/licenses/cc-by.png',
 283                 ],
 284                 'cc-by-sa' => [
 285                         'url' => 'https://creativecommons.org/licenses/by-sa/4.0/',
 286                         'icon' => '$wgResourceBasePath/resources/assets/licenses/cc-by-sa.png',
 287                 ],
 288                 'cc-by-nc-sa' => [
 289                         'url' => 'https://creativecommons.org/licenses/by-nc-sa/4.0/',
 290                         'icon' => '$wgResourceBasePath/resources/assets/licenses/cc-by-nc-sa.png',
 291                 ],
 292                 'cc-0' => [
 293                         'url' => 'https://creativecommons.org/publicdomain/zero/1.0/',
 294                         'icon' => '$wgResourceBasePath/resources/assets/licenses/cc-0.png',
 295                 ],
 296                 'pd' => [
 297                         'url' => '',
 298                         'icon' => '$wgResourceBasePath/resources/assets/licenses/public-domain.png',
 299                 ],
 300                 'gfdl' => [
 301                         'url' => 'https://www.gnu.org/copyleft/fdl.html',
 302                         'icon' => '$wgResourceBasePath/resources/assets/licenses/gnu-fdl.png',
 303                 ],
 304                 'none' => [
 305                         'url' => '',
 306                         'icon' => '',
 307                         'text' => ''
 308                 ],
 309                 'cc-choose' => [
 310                         // Details will be filled in by the selector.
 311                         'url' => '',
 312                         'icon' => '',
 313                         'text' => '',
 314                 ],
 315         ];
 316
 317         /**
 318          * URL to mediawiki-announce subscription
 319          */
 320         protected $mediaWikiAnnounceUrl =
 321                 'https://lists.wikimedia.org/mailman/subscribe/mediawiki-announce';
 322
 323         /**
 324          * Supported language codes for Mailman
 325          */
 326         protected $mediaWikiAnnounceLanguages = [
 327                 'ca', 'cs', 'da', 'de', 'en', 'es', 'et', 'eu', 'fi', 'fr', 'hr', 'hu',
 328                 'it', 'ja', 'ko', 'lt', 'nl', 'no', 'pl', 'pt', 'pt-br', 'ro', 'ru',
 329                 'sl', 'sr', 'sv', 'tr', 'uk'
 330         ];
 331
 332         /**
 333          * UI interface for displaying a short message
 334          * The parameters are like parameters to wfMessage().
 335          * The messages will be in wikitext format, which will be converted to an
 336          * output format such as HTML or text before being sent to the user.
 337          * @param string $msg
 338          */
 339         abstract public function showMessage( $msg /*, ... */ );
 340
 341         /**
 342          * Same as showMessage(), but for displaying errors
 343          * @param string $msg
 344          */
 345         abstract public function showError( $msg /*, ... */ );
 346
 347         /**
 348          * Show a message to the installing user by using a Status object
 349          * @param Status $status
 350          */
 351         abstract public function showStatusMessage( Status $status );
 352
 353         /**
 354          * Constructs a Config object that contains configuration settings that should be
 355          * overwritten for the installation process.
 356          *
 357          * @since 1.27
 358          *
 359          * @param Config $baseConfig
 360          *
 361          * @return Config The config to use during installation.
 362          */
 363         public static function getInstallerConfig( Config $baseConfig ) {
 364                 $configOverrides = new HashConfig();
 365
 366                 // disable (problematic) object cache types explicitly, preserving all other (working) ones
 367                 // bug T113843
 368                 $emptyCache = [ 'class' => 'EmptyBagOStuff' ];
 369
 370                 $objectCaches = [
 371                                 CACHE_NONE => $emptyCache,
 372                                 CACHE_DB => $emptyCache,
 373                                 CACHE_ANYTHING => $emptyCache,
 374                                 CACHE_MEMCACHED => $emptyCache,
 375                         ] + $baseConfig->get( 'ObjectCaches' );
 376
 377                 $configOverrides->set( 'ObjectCaches', $objectCaches );
 378
 379                 // Load the installer's i18n.
 380                 $messageDirs = $baseConfig->get( 'MessagesDirs' );
 381                 $messageDirs['MediawikiInstaller'] = __DIR__ . '/i18n';
 382
 383                 $configOverrides->set( 'MessagesDirs', $messageDirs );
 384
 385                 $installerConfig = new MultiConfig( [ $configOverrides, $baseConfig ] );
 386
 387                 // make sure we use the installer config as the main config
 388                 $configRegistry = $baseConfig->get( 'ConfigRegistry' );
 389                 $configRegistry['main'] = function() use ( $installerConfig ) {
 390                         return $installerConfig;
 391                 };
 392
 393                 $configOverrides->set( 'ConfigRegistry', $configRegistry );
 394
 395                 return $installerConfig;
 396         }
 397
 398         /**
 399          * Constructor, always call this from child classes.
 400          */
 401         public function __construct() {
 402                 global $wgMemc, $wgUser, $wgObjectCaches;
 403
 404                 $defaultConfig = new GlobalVarConfig(); // all the stuff from DefaultSettings.php
 405                 $installerConfig = self::getInstallerConfig( $defaultConfig );
 406
 407                 // Reset all services and inject config overrides
 408                 MediaWiki\MediaWikiServices::resetGlobalInstance( $installerConfig );
 409
 410                 // Don't attempt to load user language options (T126177)
 411                 // This will be overridden in the web installer with the user-specified language
 412                 RequestContext::getMain()->setLanguage( 'en' );
 413
 414                 // Disable the i18n cache
 415                 // TODO: manage LocalisationCache singleton in MediaWikiServices
 416                 Language::getLocalisationCache()->disableBackend();
 417
 418                 // Disable all global services, since we don't have any configuration yet!
 419                 MediaWiki\MediaWikiServices::disableStorageBackend();
 420
 421                 // Disable object cache (otherwise CACHE_ANYTHING will try CACHE_DB and
 422                 // SqlBagOStuff will then throw since we just disabled wfGetDB)
 423                 $wgObjectCaches = MediaWikiServices::getInstance()->getMainConfig()->get( 'ObjectCaches' );
 424                 $wgMemc = ObjectCache::getInstance( CACHE_NONE );
 425
 426                 // Having a user with id = 0 safeguards us from DB access via User::loadOptions().
 427                 $wgUser = User::newFromId( 0 );
 428                 RequestContext::getMain()->setUser( $wgUser );
 429
 430                 $this->settings = $this->internalDefaults;
 431
 432                 foreach ( $this->defaultVarNames as $var ) {
 433                         $this->settings[$var] = $GLOBALS[$var];
 434                 }
 435
 436                 $this->doEnvironmentPreps();
 437
 438                 $this->compiledDBs = [];
 439                 foreach ( self::getDBTypes() as $type ) {
 440                         $installer = $this->getDBInstaller( $type );
 441
 442                         if ( !$installer->isCompiled() ) {
 443                                 continue;
 444                         }
 445                         $this->compiledDBs[] = $type;
 446                 }
 447
 448                 $this->parserTitle = Title::newFromText( 'Installer' );
 449                 $this->parserOptions = new ParserOptions( $wgUser ); // language will be wrong :(
 450                 $this->parserOptions->setEditSection( false );
 451         }
 452
 453         /**
 454          * Get a list of known DB types.
 455          *
 456          * @return array
 457          */
 458         public static function getDBTypes() {
 459                 return self::$dbTypes;
 460         }
 461
 462         /**
 463          * Do initial checks of the PHP environment. Set variables according to
 464          * the observed environment.
 465          *
 466          * It's possible that this may be called under the CLI SAPI, not the SAPI
 467          * that the wiki will primarily run under. In that case, the subclass should
 468          * initialise variables such as wgScriptPath, before calling this function.
 469          *
 470          * Under the web subclass, it can already be assumed that PHP 5+ is in use
 471          * and that sessions are working.
 472          *
 473          * @return Status
 474          */
 475         public function doEnvironmentChecks() {
 476                 // Php version has already been checked by entry scripts
 477                 // Show message here for information purposes
 478                 if ( wfIsHHVM() ) {
 479                         $this->showMessage( 'config-env-hhvm', HHVM_VERSION );
 480                 } else {
 481                         $this->showMessage( 'config-env-php', PHP_VERSION );
 482                 }
 483
 484                 $good = true;
 485                 // Must go here because an old version of PCRE can prevent other checks from completing
 486                 list( $pcreVersion ) = explode( ' ', PCRE_VERSION, 2 );
 487                 if ( version_compare( $pcreVersion, self::MINIMUM_PCRE_VERSION, '<' ) ) {
 488                         $this->showError( 'config-pcre-old', self::MINIMUM_PCRE_VERSION, $pcreVersion );
 489                         $good = false;
 490                 } else {
 491                         foreach ( $this->envChecks as $check ) {
 492                                 $status = $this->$check();
 493                                 if ( $status === false ) {
 494                                         $good = false;
 495                                 }
 496                         }
 497                 }
 498
 499                 $this->setVar( '_Environment', $good );
 500
 501                 return $good ? Status::newGood() : Status::newFatal( 'config-env-bad' );
 502         }
 503
 504         public function doEnvironmentPreps() {
 505                 foreach ( $this->envPreps as $prep ) {
 506                         $this->$prep();
 507                 }
 508         }
 509
 510         /**
 511          * Set a MW configuration variable, or internal installer configuration variable.
 512          *
 513          * @param string $name
 514          * @param mixed $value
 515          */
 516         public function setVar( $name, $value ) {
 517                 $this->settings[$name] = $value;
 518         }
 519
 520         /**
 521          * Get an MW configuration variable, or internal installer configuration variable.
 522          * The defaults come from $GLOBALS (ultimately DefaultSettings.php).
 523          * Installer variables are typically prefixed by an underscore.
 524          *
 525          * @param string $name
 526          * @param mixed $default
 527          *
 528          * @return mixed
 529          */
 530         public function getVar( $name, $default = null ) {
 531                 if ( !isset( $this->settings[$name] ) ) {
 532                         return $default;
 533                 } else {
 534                         return $this->settings[$name];
 535                 }
 536         }
 537
 538         /**
 539          * Get a list of DBs supported by current PHP setup
 540          *
 541          * @return array
 542          */
 543         public function getCompiledDBs() {
 544                 return $this->compiledDBs;
 545         }
 546
 547         /**
 548          * Get an instance of DatabaseInstaller for the specified DB type.
 549          *
 550          * @param mixed $type DB installer for which is needed, false to use default.
 551          *
 552          * @return DatabaseInstaller
 553          */
 554         public function getDBInstaller( $type = false ) {
 555                 if ( !$type ) {
 556                         $type = $this->getVar( 'wgDBtype' );
 557                 }
 558
 559                 $type = strtolower( $type );
 560
 561                 if ( !isset( $this->dbInstallers[$type] ) ) {
 562                         $class = ucfirst( $type ) . 'Installer';
 563                         $this->dbInstallers[$type] = new $class( $this );
 564                 }
 565
 566                 return $this->dbInstallers[$type];
 567         }
 568
 569         /**
 570          * Determine if LocalSettings.php exists. If it does, return its variables.
 571          *
 572          * @return array
 573          */
 574         public static function getExistingLocalSettings() {
 575                 global $IP;
 576
 577                 // You might be wondering why this is here. Well if you don't do this
 578                 // then some poorly-formed extensions try to call their own classes
 579                 // after immediately registering them. We really need to get extension
 580                 // registration out of the global scope and into a real format.
 581                 // @see https://phabricator.wikimedia.org/T69440
 582                 global $wgAutoloadClasses;
 583                 $wgAutoloadClasses = [];
 584
 585                 // @codingStandardsIgnoreStart
 586                 // LocalSettings.php should not call functions, except wfLoadSkin/wfLoadExtensions
 587                 // Define the required globals here, to ensure, the functions can do it work correctly.
 588                 global $wgExtensionDirectory, $wgStyleDirectory;
 589                 // @codingStandardsIgnoreEnd
 590
 591                 MediaWiki\suppressWarnings();
 592                 $_lsExists = file_exists( "$IP/LocalSettings.php" );
 593                 MediaWiki\restoreWarnings();
 594
 595                 if ( !$_lsExists ) {
 596                         return false;
 597                 }
 598                 unset( $_lsExists );
 599
 600                 require "$IP/includes/DefaultSettings.php";
 601                 require "$IP/LocalSettings.php";
 602
 603                 return get_defined_vars();
 604         }
 605
 606         /**
 607          * Get a fake password for sending back to the user in HTML.
 608          * This is a security mechanism to avoid compromise of the password in the
 609          * event of session ID compromise.
 610          *
 611          * @param string $realPassword
 612          *
 613          * @return string
 614          */
 615         public function getFakePassword( $realPassword ) {
 616                 return str_repeat( '*', strlen( $realPassword ) );
 617         }
 618
 619         /**
 620          * Set a variable which stores a password, except if the new value is a
 621          * fake password in which case leave it as it is.
 622          *
 623          * @param string $name
 624          * @param mixed $value
 625          */
 626         public function setPassword( $name, $value ) {
 627                 if ( !preg_match( '/^\*+$/', $value ) ) {
 628                         $this->setVar( $name, $value );
 629                 }
 630         }
 631
 632         /**
 633          * On POSIX systems return the primary group of the webserver we're running under.
 634          * On other systems just returns null.
 635          *
 636          * This is used to advice the user that he should chgrp his mw-config/data/images directory as the
 637          * webserver user before he can install.
 638          *
 639          * Public because SqliteInstaller needs it, and doesn't subclass Installer.
 640          *
 641          * @return mixed
 642          */
 643         public static function maybeGetWebserverPrimaryGroup() {
 644                 if ( !function_exists( 'posix_getegid' ) || !function_exists( 'posix_getpwuid' ) ) {
 645                         # I don't know this, this isn't UNIX.
 646                         return null;
 647                 }
 648
 649                 # posix_getegid() *not* getmygid() because we want the group of the webserver,
 650                 # not whoever owns the current script.
 651                 $gid = posix_getegid();
 652                 $group = posix_getpwuid( $gid )['name'];
 653
 654                 return $group;
 655         }
 656
 657         /**
 658          * Convert wikitext $text to HTML.
 659          *
 660          * This is potentially error prone since many parser features require a complete
 661          * installed MW database. The solution is to just not use those features when you
 662          * write your messages. This appears to work well enough. Basic formatting and
 663          * external links work just fine.
 664          *
 665          * But in case a translator decides to throw in a "#ifexist" or internal link or
 666          * whatever, this function is guarded to catch the attempted DB access and to present
 667          * some fallback text.
 668          *
 669          * @param string $text
 670          * @param bool $lineStart
 671          * @return string
 672          */
 673         public function parse( $text, $lineStart = false ) {
 674                 global $wgParser;
 675
 676                 try {
 677                         $out = $wgParser->parse( $text, $this->parserTitle, $this->parserOptions, $lineStart );
 678                         $html = $out->getText();
 679                 } catch ( DBAccessError $e ) {
 680                         $html = '<!--DB access attempted during parse-->  ' . htmlspecialchars( $text );
 681
 682                         if ( !empty( $this->debug ) ) {
 683                                 $html .= "<!--\n" . $e->getTraceAsString() . "\n-->";
 684                         }
 685                 }
 686
 687                 return $html;
 688         }
 689
 690         /**
 691          * @return ParserOptions
 692          */
 693         public function getParserOptions() {
 694                 return $this->parserOptions;
 695         }
 696
 697         public function disableLinkPopups() {
 698                 $this->parserOptions->setExternalLinkTarget( false );
 699         }
 700
 701         public function restoreLinkPopups() {
 702                 global $wgExternalLinkTarget;
 703                 $this->parserOptions->setExternalLinkTarget( $wgExternalLinkTarget );
 704         }
 705
 706         /**
 707          * Install step which adds a row to the site_stats table with appropriate
 708          * initial values.
 709          *
 710          * @param DatabaseInstaller $installer
 711          *
 712          * @return Status
 713          */
 714         public function populateSiteStats( DatabaseInstaller $installer ) {
 715                 $status = $installer->getConnection();
 716                 if ( !$status->isOK() ) {
 717                         return $status;
 718                 }
 719                 $status->value->insert(
 720                         'site_stats',
 721                         [
 722                                 'ss_row_id' => 1,
 723                                 'ss_total_edits' => 0,
 724                                 'ss_good_articles' => 0,
 725                                 'ss_total_pages' => 0,
 726                                 'ss_users' => 0,
 727                                 'ss_images' => 0
 728                         ],
 729                         __METHOD__, 'IGNORE'
 730                 );
 731
 732                 return Status::newGood();
 733         }
 734
 735         /**
 736          * Environment check for DB types.
 737          * @return bool
 738          */
 739         protected function envCheckDB() {
 740                 global $wgLang;
 741
 742                 $allNames = [];
 743
 744                 // Messages: config-type-mysql, config-type-postgres, config-type-oracle,
 745                 // config-type-sqlite
 746                 foreach ( self::getDBTypes() as $name ) {
 747                         $allNames[] = wfMessage( "config-type-$name" )->text();
 748                 }
 749
 750                 $databases = $this->getCompiledDBs();
 751
 752                 $databases = array_flip( $databases );
 753                 foreach ( array_keys( $databases ) as $db ) {
 754                         $installer = $this->getDBInstaller( $db );
 755                         $status = $installer->checkPrerequisites();
 756                         if ( !$status->isGood() ) {
 757                                 $this->showStatusMessage( $status );
 758                         }
 759                         if ( !$status->isOK() ) {
 760                                 unset( $databases[$db] );
 761                         }
 762                 }
 763                 $databases = array_flip( $databases );
 764                 if ( !$databases ) {
 765                         $this->showError( 'config-no-db', $wgLang->commaList( $allNames ), count( $allNames ) );
 766
 767                         // @todo FIXME: This only works for the web installer!
 768                         return false;
 769                 }
 770
 771                 return true;
 772         }
 773
 774         /**
 775          * Some versions of libxml+PHP break < and > encoding horribly
 776          * @return bool
 777          */
 778         protected function envCheckBrokenXML() {
 779                 $test = new PhpXmlBugTester();
 780                 if ( !$test->ok ) {
 781                         $this->showError( 'config-brokenlibxml' );
 782
 783                         return false;
 784                 }
 785
 786                 return true;
 787         }
 788
 789         /**
 790          * Environment check for the PCRE module.
 791          *
 792          * @note If this check were to fail, the parser would
 793          *   probably throw an exception before the result
 794          *   of this check is shown to the user.
 795          * @return bool
 796          */
 797         protected function envCheckPCRE() {
 798                 MediaWiki\suppressWarnings();
 799                 $regexd = preg_replace( '/[\x{0430}-\x{04FF}]/iu', '', '-АБВГД-' );
 800                 // Need to check for \p support too, as PCRE can be compiled
 801                 // with utf8 support, but not unicode property support.
 802                 // check that \p{Zs} (space separators) matches
 803                 // U+3000 (Ideographic space)
 804                 $regexprop = preg_replace( '/\p{Zs}/u', '', "-\xE3\x80\x80-" );
 805                 MediaWiki\restoreWarnings();
 806                 if ( $regexd != '--' || $regexprop != '--' ) {
 807                         $this->showError( 'config-pcre-no-utf8' );
 808
 809                         return false;
 810                 }
 811
 812                 return true;
 813         }
 814
 815         /**
 816          * Environment check for available memory.
 817          * @return bool
 818          */
 819         protected function envCheckMemory() {
 820                 $limit = ini_get( 'memory_limit' );
 821
 822                 if ( !$limit || $limit == -1 ) {
 823                         return true;
 824                 }
 825
 826                 $n = wfShorthandToInteger( $limit );
 827
 828                 if ( $n < $this->minMemorySize * 1024 * 1024 ) {
 829                         $newLimit = "{$this->minMemorySize}M";
 830
 831                         if ( ini_set( "memory_limit", $newLimit ) === false ) {
 832                                 $this->showMessage( 'config-memory-bad', $limit );
 833                         } else {
 834                                 $this->showMessage( 'config-memory-raised', $limit, $newLimit );
 835                                 $this->setVar( '_RaiseMemory', true );
 836                         }
 837                 }
 838
 839                 return true;
 840         }
 841
 842         /**
 843          * Environment check for compiled object cache types.
 844          */
 845         protected function envCheckCache() {
 846                 $caches = [];
 847                 foreach ( $this->objectCaches as $name => $function ) {
 848                         if ( function_exists( $function ) ) {
 849                                 if ( $name == 'xcache' && !wfIniGetBool( 'xcache.var_size' ) ) {
 850                                         continue;
 851                                 }
 852                                 $caches[$name] = true;
 853                         }
 854                 }
 855
 856                 if ( !$caches ) {
 857                         $key = 'config-no-cache-apcu';
 858                         $this->showMessage( $key );
 859                 }
 860
 861                 $this->setVar( '_Caches', $caches );
 862         }
 863
 864         /**
 865          * Scare user to death if they have mod_security or mod_security2
 866          * @return bool
 867          */
 868         protected function envCheckModSecurity() {
 869                 if ( self::apacheModulePresent( 'mod_security' )
 870                         || self::apacheModulePresent( 'mod_security2' ) ) {
 871                         $this->showMessage( 'config-mod-security' );
 872                 }
 873
 874                 return true;
 875         }
 876
 877         /**
 878          * Search for GNU diff3.
 879          * @return bool
 880          */
 881         protected function envCheckDiff3() {
 882                 $names = [ "gdiff3", "diff3", "diff3.exe" ];
 883                 $versionInfo = [ '$1 --version 2>&1', 'GNU diffutils' ];
 884
 885                 $diff3 = self::locateExecutableInDefaultPaths( $names, $versionInfo );
 886
 887                 if ( $diff3 ) {
 888                         $this->setVar( 'wgDiff3', $diff3 );
 889                 } else {
 890                         $this->setVar( 'wgDiff3', false );
 891                         $this->showMessage( 'config-diff3-bad' );
 892                 }
 893
 894                 return true;
 895         }
 896
 897         /**
 898          * Environment check for ImageMagick and GD.
 899          * @return bool
 900          */
 901         protected function envCheckGraphics() {
 902                 $names = [ wfIsWindows() ? 'convert.exe' : 'convert' ];
 903                 $versionInfo = [ '$1 -version', 'ImageMagick' ];
 904                 $convert = self::locateExecutableInDefaultPaths( $names, $versionInfo );
 905
 906                 $this->setVar( 'wgImageMagickConvertCommand', '' );
 907                 if ( $convert ) {
 908                         $this->setVar( 'wgImageMagickConvertCommand', $convert );
 909                         $this->showMessage( 'config-imagemagick', $convert );
 910
 911                         return true;
 912                 } elseif ( function_exists( 'imagejpeg' ) ) {
 913                         $this->showMessage( 'config-gd' );
 914                 } else {
 915                         $this->showMessage( 'config-no-scaling' );
 916                 }
 917
 918                 return true;
 919         }
 920
 921         /**
 922          * Search for git.
 923          *
 924          * @since 1.22
 925          * @return bool
 926          */
 927         protected function envCheckGit() {
 928                 $names = [ wfIsWindows() ? 'git.exe' : 'git' ];
 929                 $versionInfo = [ '$1 --version', 'git version' ];
 930
 931                 $git = self::locateExecutableInDefaultPaths( $names, $versionInfo );
 932
 933                 if ( $git ) {
 934                         $this->setVar( 'wgGitBin', $git );
 935                         $this->showMessage( 'config-git', $git );
 936                 } else {
 937                         $this->setVar( 'wgGitBin', false );
 938                         $this->showMessage( 'config-git-bad' );
 939                 }
 940
 941                 return true;
 942         }
 943
 944         /**
 945          * Environment check to inform user which server we've assumed.
 946          *
 947          * @return bool
 948          */
 949         protected function envCheckServer() {
 950                 $server = $this->envGetDefaultServer();
 951                 if ( $server !== null ) {
 952                         $this->showMessage( 'config-using-server', $server );
 953                 }
 954                 return true;
 955         }
 956
 957         /**
 958          * Environment check to inform user which paths we've assumed.
 959          *
 960          * @return bool
 961          */
 962         protected function envCheckPath() {
 963                 $this->showMessage(
 964                         'config-using-uri',
 965                         $this->getVar( 'wgServer' ),
 966                         $this->getVar( 'wgScriptPath' )
 967                 );
 968                 return true;
 969         }
 970
 971         /**
 972          * Environment check for preferred locale in shell
 973          * @return bool
 974          */
 975         protected function envCheckShellLocale() {
 976                 $os = php_uname( 's' );
 977                 $supported = [ 'Linux', 'SunOS', 'HP-UX', 'Darwin' ]; # Tested these
 978
 979                 if ( !in_array( $os, $supported ) ) {
 980                         return true;
 981                 }
 982
 983                 # Get a list of available locales.
 984                 $ret = false;
 985                 $lines = wfShellExec( '/usr/bin/locale -a', $ret );
 986
 987                 if ( $ret ) {
 988                         return true;
 989                 }
 990
 991                 $lines = array_map( 'trim', explode( "\n", $lines ) );
 992                 $candidatesByLocale = [];
 993                 $candidatesByLang = [];
 994
 995                 foreach ( $lines as $line ) {
 996                         if ( $line === '' ) {
 997                                 continue;
 998                         }
 999
1000                         if ( !preg_match( '/^([a-zA-Z]+)(_[a-zA-Z]+|)\.(utf8|UTF-8)(@[a-zA-Z_]*|)$/i', $line, $m ) ) {
1001                                 continue;
1002                         }
1003
1004                         list( , $lang, , , ) = $m;
1005
1006                         $candidatesByLocale[$m[0]] = $m;
1007                         $candidatesByLang[$lang][] = $m;
1008                 }
1009
1010                 # Try the current value of LANG.
1011                 if ( isset( $candidatesByLocale[getenv( 'LANG' )] ) ) {
1012                         $this->setVar( 'wgShellLocale', getenv( 'LANG' ) );
1013
1014                         return true;
1015                 }
1016
1017                 # Try the most common ones.
1018                 $commonLocales = [ 'en_US.UTF-8', 'en_US.utf8', 'de_DE.UTF-8', 'de_DE.utf8' ];
1019                 foreach ( $commonLocales as $commonLocale ) {
1020                         if ( isset( $candidatesByLocale[$commonLocale] ) ) {
1021                                 $this->setVar( 'wgShellLocale', $commonLocale );
1022
1023                                 return true;
1024                         }
1025                 }
1026
1027                 # Is there an available locale in the Wiki's language?
1028                 $wikiLang = $this->getVar( 'wgLanguageCode' );
1029
1030                 if ( isset( $candidatesByLang[$wikiLang] ) ) {
1031                         $m = reset( $candidatesByLang[$wikiLang] );
1032                         $this->setVar( 'wgShellLocale', $m[0] );
1033
1034                         return true;
1035                 }
1036
1037                 # Are there any at all?
1038                 if ( count( $candidatesByLocale ) ) {
1039                         $m = reset( $candidatesByLocale );
1040                         $this->setVar( 'wgShellLocale', $m[0] );
1041
1042                         return true;
1043                 }
1044
1045                 # Give up.
1046                 return true;
1047         }
1048
1049         /**
1050          * Environment check for the permissions of the uploads directory
1051          * @return bool
1052          */
1053         protected function envCheckUploadsDirectory() {
1054                 global $IP;
1055
1056                 $dir = $IP . '/images/';
1057                 $url = $this->getVar( 'wgServer' ) . $this->getVar( 'wgScriptPath' ) . '/images/';
1058                 $safe = !$this->dirIsExecutable( $dir, $url );
1059
1060                 if ( !$safe ) {
1061                         $this->showMessage( 'config-uploads-not-safe', $dir );
1062                 }
1063
1064                 return true;
1065         }
1066
1067         /**
1068          * Checks if suhosin.get.max_value_length is set, and if so generate
1069          * a warning because it decreases ResourceLoader performance.
1070          * @return bool
1071          */
1072         protected function envCheckSuhosinMaxValueLength() {
1073                 $maxValueLength = ini_get( 'suhosin.get.max_value_length' );
1074                 if ( $maxValueLength > 0 && $maxValueLength < 1024 ) {
1075                         // Only warn if the value is below the sane 1024
1076                         $this->showMessage( 'config-suhosin-max-value-length', $maxValueLength );
1077                 }
1078
1079                 return true;
1080         }
1081
1082         /**
1083          * Convert a hex string representing a Unicode code point to that code point.
1084          * @param string $c
1085          * @return string
1086          */
1087         protected function unicodeChar( $c ) {
1088                 $c = hexdec( $c );
1089                 if ( $c <= 0x7F ) {
1090                         return chr( $c );
1091                 } elseif ( $c <= 0x7FF ) {
1092                         return chr( 0xC0 | $c >> 6 ) . chr( 0x80 | $c & 0x3F );
1093                 } elseif ( $c <= 0xFFFF ) {
1094                         return chr( 0xE0 | $c >> 12 ) . chr( 0x80 | $c >> 6 & 0x3F ) .
1095                                 chr( 0x80 | $c & 0x3F );
1096                 } elseif ( $c <= 0x10FFFF ) {
1097                         return chr( 0xF0 | $c >> 18 ) . chr( 0x80 | $c >> 12 & 0x3F ) .
1098                                 chr( 0x80 | $c >> 6 & 0x3F ) .
1099                                 chr( 0x80 | $c & 0x3F );
1100                 } else {
1101                         return false;
1102                 }
1103         }
1104
1105         /**
1106          * Check the libicu version
1107          */
1108         protected function envCheckLibicu() {
1109                 /**
1110                  * This needs to be updated something that the latest libicu
1111                  * will properly normalize.  This normalization was found at
1112                  * http://www.unicode.org/versions/Unicode5.2.0/#Character_Additions
1113                  * Note that we use the hex representation to create the code
1114                  * points in order to avoid any Unicode-destroying during transit.
1115                  */
1116                 $not_normal_c = $this->unicodeChar( "FA6C" );
1117                 $normal_c = $this->unicodeChar( "242EE" );
1118
1119                 $useNormalizer = 'php';
1120                 $needsUpdate = false;
1121
1122                 if ( function_exists( 'normalizer_normalize' ) ) {
1123                         $useNormalizer = 'intl';
1124                         $intl = normalizer_normalize( $not_normal_c, Normalizer::FORM_C );
1125                         if ( $intl !== $normal_c ) {
1126                                 $needsUpdate = true;
1127                         }
1128                 }
1129
1130                 // Uses messages 'config-unicode-using-php' and 'config-unicode-using-intl'
1131                 if ( $useNormalizer === 'php' ) {
1132                         $this->showMessage( 'config-unicode-pure-php-warning' );
1133                 } else {
1134                         $this->showMessage( 'config-unicode-using-' . $useNormalizer );
1135                         if ( $needsUpdate ) {
1136                                 $this->showMessage( 'config-unicode-update-warning' );
1137                         }
1138                 }
1139         }
1140
1141         /**
1142          * Environment prep for the server hostname.
1143          */
1144         protected function envPrepServer() {
1145                 $server = $this->envGetDefaultServer();
1146                 if ( $server !== null ) {
1147                         $this->setVar( 'wgServer', $server );
1148                 }
1149         }
1150
1151         /**
1152          * Helper function to be called from envPrepServer()
1153          * @return string
1154          */
1155         abstract protected function envGetDefaultServer();
1156
1157         /**
1158          * Environment prep for setting $IP and $wgScriptPath.
1159          */
1160         protected function envPrepPath() {
1161                 global $IP;
1162                 $IP = dirname( dirname( __DIR__ ) );
1163                 $this->setVar( 'IP', $IP );
1164         }
1165
1166         /**
1167          * Get an array of likely places we can find executables. Check a bunch
1168          * of known Unix-like defaults, as well as the PATH environment variable
1169          * (which should maybe make it work for Windows?)
1170          *
1171          * @return array
1172          */
1173         protected static function getPossibleBinPaths() {
1174                 return array_merge(
1175                         [ '/usr/bin', '/usr/local/bin', '/opt/csw/bin',
1176                                 '/usr/gnu/bin', '/usr/sfw/bin', '/sw/bin', '/opt/local/bin' ],
1177                         explode( PATH_SEPARATOR, getenv( 'PATH' ) )
1178                 );
1179         }
1180
1181         /**
1182          * Search a path for any of the given executable names. Returns the
1183          * executable name if found. Also checks the version string returned
1184          * by each executable.
1185          *
1186          * Used only by environment checks.
1187          *
1188          * @param string $path Path to search
1189          * @param array $names Array of executable names
1190          * @param array|bool $versionInfo False or array with two members:
1191          *   0 => Command to run for version check, with $1 for the full executable name
1192          *   1 => String to compare the output with
1193          *
1194          * If $versionInfo is not false, only executables with a version
1195          * matching $versionInfo[1] will be returned.
1196          * @return bool|string
1197          */
1198         public static function locateExecutable( $path, $names, $versionInfo = false ) {
1199                 if ( !is_array( $names ) ) {
1200                         $names = [ $names ];
1201                 }
1202
1203                 foreach ( $names as $name ) {
1204                         $command = $path . DIRECTORY_SEPARATOR . $name;
1205
1206                         MediaWiki\suppressWarnings();
1207                         $file_exists = is_executable( $command );
1208                         MediaWiki\restoreWarnings();
1209
1210                         if ( $file_exists ) {
1211                                 if ( !$versionInfo ) {
1212                                         return $command;
1213                                 }
1214
1215                                 $file = str_replace( '$1', wfEscapeShellArg( $command ), $versionInfo[0] );
1216                                 if ( strstr( wfShellExec( $file ), $versionInfo[1] ) !== false ) {
1217                                         return $command;
1218                                 }
1219                         }
1220                 }
1221
1222                 return false;
1223         }
1224
1225         /**
1226          * Same as locateExecutable(), but checks in getPossibleBinPaths() by default
1227          * @see locateExecutable()
1228          * @param array $names Array of possible names.
1229          * @param array|bool $versionInfo Default: false or array with two members:
1230          *   0 => Command to run for version check, with $1 for the full executable name
1231          *   1 => String to compare the output with
1232          *
1233          * If $versionInfo is not false, only executables with a version
1234          * matching $versionInfo[1] will be returned.
1235          * @return bool|string
1236          */
1237         public static function locateExecutableInDefaultPaths( $names, $versionInfo = false ) {
1238                 foreach ( self::getPossibleBinPaths() as $path ) {
1239                         $exe = self::locateExecutable( $path, $names, $versionInfo );
1240                         if ( $exe !== false ) {
1241                                 return $exe;
1242                         }
1243                 }
1244
1245                 return false;
1246         }
1247
1248         /**
1249          * Checks if scripts located in the given directory can be executed via the given URL.
1250          *
1251          * Used only by environment checks.
1252          * @param string $dir
1253          * @param string $url
1254          * @return bool|int|string
1255          */
1256         public function dirIsExecutable( $dir, $url ) {
1257                 $scriptTypes = [
1258                         'php' => [
1259                                 "<?php echo 'ex' . 'ec';",
1260                                 "#!/var/env php5\n<?php echo 'ex' . 'ec';",
1261                         ],
1262                 ];
1263
1264                 // it would be good to check other popular languages here, but it'll be slow.
1265
1266                 MediaWiki\suppressWarnings();
1267
1268                 foreach ( $scriptTypes as $ext => $contents ) {
1269                         foreach ( $contents as $source ) {
1270                                 $file = 'exectest.' . $ext;
1271
1272                                 if ( !file_put_contents( $dir . $file, $source ) ) {
1273                                         break;
1274                                 }
1275
1276                                 try {
1277                                         $text = Http::get( $url . $file, [ 'timeout' => 3 ], __METHOD__ );
1278                                 } catch ( Exception $e ) {
1279                                         // Http::get throws with allow_url_fopen = false and no curl extension.
1280                                         $text = null;
1281                                 }
1282                                 unlink( $dir . $file );
1283
1284                                 if ( $text == 'exec' ) {
1285                                         MediaWiki\restoreWarnings();
1286
1287                                         return $ext;
1288                                 }
1289                         }
1290                 }
1291
1292                 MediaWiki\restoreWarnings();
1293
1294                 return false;
1295         }
1296
1297         /**
1298          * Checks for presence of an Apache module. Works only if PHP is running as an Apache module, too.
1299          *
1300          * @param string $moduleName Name of module to check.
1301          * @return bool
1302          */
1303         public static function apacheModulePresent( $moduleName ) {
1304                 if ( function_exists( 'apache_get_modules' ) && in_array( $moduleName, apache_get_modules() ) ) {
1305                         return true;
1306                 }
1307                 // try it the hard way
1308                 ob_start();
1309                 phpinfo( INFO_MODULES );
1310                 $info = ob_get_clean();
1311
1312                 return strpos( $info, $moduleName ) !== false;
1313         }
1314
1315         /**
1316          * ParserOptions are constructed before we determined the language, so fix it
1317          *
1318          * @param Language $lang
1319          */
1320         public function setParserLanguage( $lang ) {
1321                 $this->parserOptions->setTargetLanguage( $lang );
1322                 $this->parserOptions->setUserLang( $lang );
1323         }
1324
1325         /**
1326          * Overridden by WebInstaller to provide lastPage parameters.
1327          * @param string $page
1328          * @return string
1329          */
1330         protected function getDocUrl( $page ) {
1331                 return "{$_SERVER['PHP_SELF']}?page=" . urlencode( $page );
1332         }
1333
1334         /**
1335          * Finds extensions that follow the format /$directory/Name/Name.php,
1336          * and returns an array containing the value for 'Name' for each found extension.
1337          *
1338          * Reasonable values for $directory include 'extensions' (the default) and 'skins'.
1339          *
1340          * @param string $directory Directory to search in
1341          * @return array
1342          */
1343         public function findExtensions( $directory = 'extensions' ) {
1344                 if ( $this->getVar( 'IP' ) === null ) {
1345                         return [];
1346                 }
1347
1348                 $extDir = $this->getVar( 'IP' ) . '/' . $directory;
1349                 if ( !is_readable( $extDir ) || !is_dir( $extDir ) ) {
1350                         return [];
1351                 }
1352
1353                 // extensions -> extension.json, skins -> skin.json
1354                 $jsonFile = substr( $directory, 0, strlen( $directory ) -1 ) . '.json';
1355
1356                 $dh = opendir( $extDir );
1357                 $exts = [];
1358                 while ( ( $file = readdir( $dh ) ) !== false ) {
1359                         if ( !is_dir( "$extDir/$file" ) ) {
1360                                 continue;
1361                         }
1362                         if ( file_exists( "$extDir/$file/$jsonFile" ) || file_exists( "$extDir/$file/$file.php" ) ) {
1363                                 $exts[] = $file;
1364                         }
1365                 }
1366                 closedir( $dh );
1367                 natcasesort( $exts );
1368
1369                 return $exts;
1370         }
1371
1372         /**
1373          * Returns a default value to be used for $wgDefaultSkin: normally the one set in DefaultSettings,
1374          * but will fall back to another if the default skin is missing and some other one is present
1375          * instead.
1376          *
1377          * @param string[] $skinNames Names of installed skins.
1378          * @return string
1379          */
1380         public function getDefaultSkin( array $skinNames ) {
1381                 $defaultSkin = $GLOBALS['wgDefaultSkin'];
1382                 if ( !$skinNames || in_array( $defaultSkin, $skinNames ) ) {
1383                         return $defaultSkin;
1384                 } else {
1385                         return $skinNames[0];
1386                 }
1387         }
1388
1389         /**
1390          * Installs the auto-detected extensions.
1391          *
1392          * @return Status
1393          */
1394         protected function includeExtensions() {
1395                 global $IP;
1396                 $exts = $this->getVar( '_Extensions' );
1397                 $IP = $this->getVar( 'IP' );
1398
1399                 /**
1400                  * We need to include DefaultSettings before including extensions to avoid
1401                  * warnings about unset variables. However, the only thing we really
1402                  * want here is $wgHooks['LoadExtensionSchemaUpdates']. This won't work
1403                  * if the extension has hidden hook registration in $wgExtensionFunctions,
1404                  * but we're not opening that can of worms
1405                  * @see https://phabricator.wikimedia.org/T28857
1406                  */
1407                 global $wgAutoloadClasses;
1408                 $wgAutoloadClasses = [];
1409                 $queue = [];
1410
1411                 require "$IP/includes/DefaultSettings.php";
1412
1413                 foreach ( $exts as $e ) {
1414                         if ( file_exists( "$IP/extensions/$e/extension.json" ) ) {
1415                                 $queue["$IP/extensions/$e/extension.json"] = 1;
1416                         } else {
1417                                 require_once "$IP/extensions/$e/$e.php";
1418                         }
1419                 }
1420
1421                 $registry = new ExtensionRegistry();
1422                 $data = $registry->readFromQueue( $queue );
1423                 $wgAutoloadClasses += $data['autoload'];
1424
1425                 $hooksWeWant = isset( $wgHooks['LoadExtensionSchemaUpdates'] ) ?
1426                         $wgHooks['LoadExtensionSchemaUpdates'] : [];
1427
1428                 if ( isset( $data['globals']['wgHooks']['LoadExtensionSchemaUpdates'] ) ) {
1429                         $hooksWeWant = array_merge_recursive(
1430                                 $hooksWeWant,
1431                                 $data['globals']['wgHooks']['LoadExtensionSchemaUpdates']
1432                         );
1433                 }
1434                 // Unset everyone else's hooks. Lord knows what someone might be doing
1435                 // in ParserFirstCallInit (see bug 27171)
1436                 $GLOBALS['wgHooks'] = [ 'LoadExtensionSchemaUpdates' => $hooksWeWant ];
1437
1438                 return Status::newGood();
1439         }
1440
1441         /**
1442          * Get an array of install steps. Should always be in the format of
1443          * array(
1444          *   'name'     => 'someuniquename',
1445          *   'callback' => array( $obj, 'method' ),
1446          * )
1447          * There must be a config-install-$name message defined per step, which will
1448          * be shown on install.
1449          *
1450          * @param DatabaseInstaller $installer DatabaseInstaller so we can make callbacks
1451          * @return array
1452          */
1453         protected function getInstallSteps( DatabaseInstaller $installer ) {
1454                 $coreInstallSteps = [
1455                         [ 'name' => 'database', 'callback' => [ $installer, 'setupDatabase' ] ],
1456                         [ 'name' => 'tables', 'callback' => [ $installer, 'createTables' ] ],
1457                         [ 'name' => 'interwiki', 'callback' => [ $installer, 'populateInterwikiTable' ] ],
1458                         [ 'name' => 'stats', 'callback' => [ $this, 'populateSiteStats' ] ],
1459                         [ 'name' => 'keys', 'callback' => [ $this, 'generateKeys' ] ],
1460                         [ 'name' => 'updates', 'callback' => [ $installer, 'insertUpdateKeys' ] ],
1461                         [ 'name' => 'sysop', 'callback' => [ $this, 'createSysop' ] ],
1462                         [ 'name' => 'mainpage', 'callback' => [ $this, 'createMainpage' ] ],
1463                 ];
1464
1465                 // Build the array of install steps starting from the core install list,
1466                 // then adding any callbacks that wanted to attach after a given step
1467                 foreach ( $coreInstallSteps as $step ) {
1468                         $this->installSteps[] = $step;
1469                         if ( isset( $this->extraInstallSteps[$step['name']] ) ) {
1470                                 $this->installSteps = array_merge(
1471                                         $this->installSteps,
1472                                         $this->extraInstallSteps[$step['name']]
1473                                 );
1474                         }
1475                 }
1476
1477                 // Prepend any steps that want to be at the beginning
1478                 if ( isset( $this->extraInstallSteps['BEGINNING'] ) ) {
1479                         $this->installSteps = array_merge(
1480                                 $this->extraInstallSteps['BEGINNING'],
1481                                 $this->installSteps
1482                         );
1483                 }
1484
1485                 // Extensions should always go first, chance to tie into hooks and such
1486                 if ( count( $this->getVar( '_Extensions' ) ) ) {
1487                         array_unshift( $this->installSteps,
1488                                 [ 'name' => 'extensions', 'callback' => [ $this, 'includeExtensions' ] ]
1489                         );
1490                         $this->installSteps[] = [
1491                                 'name' => 'extension-tables',
1492                                 'callback' => [ $installer, 'createExtensionTables' ]
1493                         ];
1494                 }
1495
1496                 return $this->installSteps;
1497         }
1498
1499         /**
1500          * Actually perform the installation.
1501          *
1502          * @param callable $startCB A callback array for the beginning of each step
1503          * @param callable $endCB A callback array for the end of each step
1504          *
1505          * @return array Array of Status objects
1506          */
1507         public function performInstallation( $startCB, $endCB ) {
1508                 $installResults = [];
1509                 $installer = $this->getDBInstaller();
1510                 $installer->preInstall();
1511                 $steps = $this->getInstallSteps( $installer );
1512                 foreach ( $steps as $stepObj ) {
1513                         $name = $stepObj['name'];
1514                         call_user_func_array( $startCB, [ $name ] );
1515
1516                         // Perform the callback step
1517                         $status = call_user_func( $stepObj['callback'], $installer );
1518
1519                         // Output and save the results
1520                         call_user_func( $endCB, $name, $status );
1521                         $installResults[$name] = $status;
1522
1523                         // If we've hit some sort of fatal, we need to bail.
1524                         // Callback already had a chance to do output above.
1525                         if ( !$status->isOk() ) {
1526                                 break;
1527                         }
1528                 }
1529                 if ( $status->isOk() ) {
1530                         $this->setVar( '_InstallDone', true );
1531                 }
1532
1533                 return $installResults;
1534         }
1535
1536         /**
1537          * Generate $wgSecretKey. Will warn if we had to use an insecure random source.
1538          *
1539          * @return Status
1540          */
1541         public function generateKeys() {
1542                 $keys = [ 'wgSecretKey' => 64 ];
1543                 if ( strval( $this->getVar( 'wgUpgradeKey' ) ) === '' ) {
1544                         $keys['wgUpgradeKey'] = 16;
1545                 }
1546
1547                 return $this->doGenerateKeys( $keys );
1548         }
1549
1550         /**
1551          * Generate a secret value for variables using our CryptRand generator.
1552          * Produce a warning if the random source was insecure.
1553          *
1554          * @param array $keys
1555          * @return Status
1556          */
1557         protected function doGenerateKeys( $keys ) {
1558                 $status = Status::newGood();
1559
1560                 $strong = true;
1561                 foreach ( $keys as $name => $length ) {
1562                         $secretKey = MWCryptRand::generateHex( $length, true );
1563                         if ( !MWCryptRand::wasStrong() ) {
1564                                 $strong = false;
1565                         }
1566
1567                         $this->setVar( $name, $secretKey );
1568                 }
1569
1570                 if ( !$strong ) {
1571                         $names = array_keys( $keys );
1572                         $names = preg_replace( '/^(.*)$/', '\$$1', $names );
1573                         global $wgLang;
1574                         $status->warning( 'config-insecure-keys', $wgLang->listToText( $names ), count( $names ) );
1575                 }
1576
1577                 return $status;
1578         }
1579
1580         /**
1581          * Create the first user account, grant it sysop and bureaucrat rights
1582          *
1583          * @return Status
1584          */
1585         protected function createSysop() {
1586                 $name = $this->getVar( '_AdminName' );
1587                 $user = User::newFromName( $name );
1588
1589                 if ( !$user ) {
1590                         // We should've validated this earlier anyway!
1591                         return Status::newFatal( 'config-admin-error-user', $name );
1592                 }
1593
1594                 if ( $user->idForName() == 0 ) {
1595                         $user->addToDatabase();
1596
1597                         try {
1598                                 $user->setPassword( $this->getVar( '_AdminPassword' ) );
1599                         } catch ( PasswordError $pwe ) {
1600                                 return Status::newFatal( 'config-admin-error-password', $name, $pwe->getMessage() );
1601                         }
1602
1603                         $user->addGroup( 'sysop' );
1604                         $user->addGroup( 'bureaucrat' );
1605                         if ( $this->getVar( '_AdminEmail' ) ) {
1606                                 $user->setEmail( $this->getVar( '_AdminEmail' ) );
1607                         }
1608                         $user->saveSettings();
1609
1610                         // Update user count
1611                         $ssUpdate = new SiteStatsUpdate( 0, 0, 0, 0, 1 );
1612                         $ssUpdate->doUpdate();
1613                 }
1614                 $status = Status::newGood();
1615
1616                 if ( $this->getVar( '_Subscribe' ) && $this->getVar( '_AdminEmail' ) ) {
1617                         $this->subscribeToMediaWikiAnnounce( $status );
1618                 }
1619
1620                 return $status;
1621         }
1622
1623         /**
1624          * @param Status $s
1625          */
1626         private function subscribeToMediaWikiAnnounce( Status $s ) {
1627                 $params = [
1628                         'email' => $this->getVar( '_AdminEmail' ),
1629                         'language' => 'en',
1630                         'digest' => 0
1631                 ];
1632
1633                 // Mailman doesn't support as many languages as we do, so check to make
1634                 // sure their selected language is available
1635                 $myLang = $this->getVar( '_UserLang' );
1636                 if ( in_array( $myLang, $this->mediaWikiAnnounceLanguages ) ) {
1637                         $myLang = $myLang == 'pt-br' ? 'pt_BR' : $myLang; // rewrite to Mailman's pt_BR
1638                         $params['language'] = $myLang;
1639                 }
1640
1641                 if ( MWHttpRequest::canMakeRequests() ) {
1642                         $res = MWHttpRequest::factory( $this->mediaWikiAnnounceUrl,
1643                                 [ 'method' => 'POST', 'postData' => $params ], __METHOD__ )->execute();
1644                         if ( !$res->isOK() ) {
1645                                 $s->warning( 'config-install-subscribe-fail', $res->getMessage() );
1646                         }
1647                 } else {
1648                         $s->warning( 'config-install-subscribe-notpossible' );
1649                 }
1650         }
1651
1652         /**
1653          * Insert Main Page with default content.
1654          *
1655          * @param DatabaseInstaller $installer
1656          * @return Status
1657          */
1658         protected function createMainpage( DatabaseInstaller $installer ) {
1659                 $status = Status::newGood();
1660                 try {
1661                         $page = WikiPage::factory( Title::newMainPage() );
1662                         $content = new WikitextContent(
1663                                 wfMessage( 'mainpagetext' )->inContentLanguage()->text() . "\n\n" .
1664                                 wfMessage( 'mainpagedocfooter' )->inContentLanguage()->text()
1665                         );
1666
1667                         $status = $page->doEditContent( $content,
1668                                 '',
1669                                 EDIT_NEW,
1670                                 false,
1671                                 User::newFromName( 'MediaWiki default' )
1672                         );
1673                 } catch ( Exception $e ) {
1674                         // using raw, because $wgShowExceptionDetails can not be set yet
1675                         $status->fatal( 'config-install-mainpage-failed', $e->getMessage() );
1676                 }
1677
1678                 return $status;
1679         }
1680
1681         /**
1682          * Override the necessary bits of the config to run an installation.
1683          */
1684         public static function overrideConfig() {
1685                 // Use PHP's built-in session handling, since MediaWiki's
1686                 // SessionHandler can't work before we have an object cache set up.
1687                 define( 'MW_NO_SESSION_HANDLER', 1 );
1688
1689                 // Don't access the database
1690                 $GLOBALS['wgUseDatabaseMessages'] = false;
1691                 // Don't cache langconv tables
1692                 $GLOBALS['wgLanguageConverterCacheType'] = CACHE_NONE;
1693                 // Debug-friendly
1694                 $GLOBALS['wgShowExceptionDetails'] = true;
1695                 // Don't break forms
1696                 $GLOBALS['wgExternalLinkTarget'] = '_blank';
1697
1698                 // Extended debugging
1699                 $GLOBALS['wgShowSQLErrors'] = true;
1700                 $GLOBALS['wgShowDBErrorBacktrace'] = true;
1701
1702                 // Allow multiple ob_flush() calls
1703                 $GLOBALS['wgDisableOutputCompression'] = true;
1704
1705                 // Use a sensible cookie prefix (not my_wiki)
1706                 $GLOBALS['wgCookiePrefix'] = 'mw_installer';
1707
1708                 // Some of the environment checks make shell requests, remove limits
1709                 $GLOBALS['wgMaxShellMemory'] = 0;
1710
1711                 // Override the default CookieSessionProvider with a dummy
1712                 // implementation that won't stomp on PHP's cookies.
1713                 $GLOBALS['wgSessionProviders'] = [
1714                         [
1715                                 'class' => 'InstallerSessionProvider',
1716                                 'args' => [ [
1717                                         'priority' => 1,
1718                                 ] ]
1719                         ]
1720                 ];
1721
1722                 // Don't try to use any object cache for SessionManager either.
1723                 $GLOBALS['wgSessionCacheType'] = CACHE_NONE;
1724         }
1725
1726         /**
1727          * Add an installation step following the given step.
1728          *
1729          * @param callable $callback A valid installation callback array, in this form:
1730          *    array( 'name' => 'some-unique-name', 'callback' => array( $obj, 'function' ) );
1731          * @param string $findStep The step to find. Omit to put the step at the beginning
1732          */
1733         public function addInstallStep( $callback, $findStep = 'BEGINNING' ) {
1734                 $this->extraInstallSteps[$findStep][] = $callback;
1735         }
1736
1737         /**
1738          * Disable the time limit for execution.
1739          * Some long-running pages (Install, Upgrade) will want to do this
1740          */
1741         protected function disableTimeLimit() {
1742                 MediaWiki\suppressWarnings();
1743                 set_time_limit( 0 );
1744                 MediaWiki\restoreWarnings();
1745         }
1746 }