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Diffstat (limited to 'www/wiki/includes/installer/Installer.php')
| -rw-r--r-- | www/wiki/includes/installer/Installer.php | 1814 |
1 files changed, 1814 insertions, 0 deletions
diff --git a/www/wiki/includes/installer/Installer.php b/www/wiki/includes/installer/Installer.php new file mode 100644 index 00000000..abf4de4f --- /dev/null +++ b/www/wiki/includes/installer/Installer.php @@ -0,0 +1,1814 @@ +<?php +/** + * Base code for MediaWiki installer. + * + * DO NOT PATCH THIS FILE IF YOU NEED TO CHANGE INSTALLER BEHAVIOR IN YOUR PACKAGE! + * See mw-config/overrides/README for details. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * http://www.gnu.org/copyleft/gpl.html + * + * @file + * @ingroup Deployment + */ + +use MediaWiki\Interwiki\NullInterwikiLookup; +use MediaWiki\MediaWikiServices; +use MediaWiki\Shell\Shell; + +/** + * This documentation group collects source code files with deployment functionality. + * + * @defgroup Deployment Deployment + */ + +/** + * Base installer class. + * + * This class provides the base for installation and update functionality + * for both MediaWiki core and extensions. + * + * @ingroup Deployment + * @since 1.17 + */ +abstract class Installer { + + /** + * The oldest version of PCRE we can support. + * + * Defining this is necessary because PHP may be linked with a system version + * of PCRE, which may be older than that bundled with the minimum PHP version. + */ + const MINIMUM_PCRE_VERSION = '7.2'; + + /** + * @var array + */ + protected $settings; + + /** + * List of detected DBs, access using getCompiledDBs(). + * + * @var array + */ + protected $compiledDBs; + + /** + * Cached DB installer instances, access using getDBInstaller(). + * + * @var array + */ + protected $dbInstallers = []; + + /** + * Minimum memory size in MB. + * + * @var int + */ + protected $minMemorySize = 50; + + /** + * Cached Title, used by parse(). + * + * @var Title + */ + protected $parserTitle; + + /** + * Cached ParserOptions, used by parse(). + * + * @var ParserOptions + */ + protected $parserOptions; + + /** + * Known database types. These correspond to the class names <type>Installer, + * and are also MediaWiki database types valid for $wgDBtype. + * + * To add a new type, create a <type>Installer class and a Database<type> + * class, and add a config-type-<type> message to MessagesEn.php. + * + * @var array + */ + protected static $dbTypes = [ + 'mysql', + 'postgres', + 'oracle', + 'mssql', + 'sqlite', + ]; + + /** + * A list of environment check methods called by doEnvironmentChecks(). + * These may output warnings using showMessage(), and/or abort the + * installation process by returning false. + * + * For the WebInstaller these are only called on the Welcome page, + * if these methods have side-effects that should affect later page loads + * (as well as the generated stylesheet), use envPreps instead. + * + * @var array + */ + protected $envChecks = [ + 'envCheckDB', + 'envCheckBrokenXML', + 'envCheckPCRE', + 'envCheckMemory', + 'envCheckCache', + 'envCheckModSecurity', + 'envCheckDiff3', + 'envCheckGraphics', + 'envCheckGit', + 'envCheckServer', + 'envCheckPath', + 'envCheckShellLocale', + 'envCheckUploadsDirectory', + 'envCheckLibicu', + 'envCheckSuhosinMaxValueLength', + 'envCheck64Bit', + ]; + + /** + * A list of environment preparation methods called by doEnvironmentPreps(). + * + * @var array + */ + protected $envPreps = [ + 'envPrepServer', + 'envPrepPath', + ]; + + /** + * MediaWiki configuration globals that will eventually be passed through + * to LocalSettings.php. The names only are given here, the defaults + * typically come from DefaultSettings.php. + * + * @var array + */ + protected $defaultVarNames = [ + 'wgSitename', + 'wgPasswordSender', + 'wgLanguageCode', + 'wgRightsIcon', + 'wgRightsText', + 'wgRightsUrl', + 'wgEnableEmail', + 'wgEnableUserEmail', + 'wgEnotifUserTalk', + 'wgEnotifWatchlist', + 'wgEmailAuthentication', + 'wgDBname', + 'wgDBtype', + 'wgDiff3', + 'wgImageMagickConvertCommand', + 'wgGitBin', + 'IP', + 'wgScriptPath', + 'wgMetaNamespace', + 'wgDeletedDirectory', + 'wgEnableUploads', + 'wgShellLocale', + 'wgSecretKey', + 'wgUseInstantCommons', + 'wgUpgradeKey', + 'wgDefaultSkin', + 'wgPingback', + ]; + + /** + * Variables that are stored alongside globals, and are used for any + * configuration of the installation process aside from the MediaWiki + * configuration. Map of names to defaults. + * + * @var array + */ + protected $internalDefaults = [ + '_UserLang' => 'en', + '_Environment' => false, + '_RaiseMemory' => false, + '_UpgradeDone' => false, + '_InstallDone' => false, + '_Caches' => [], + '_InstallPassword' => '', + '_SameAccount' => true, + '_CreateDBAccount' => false, + '_NamespaceType' => 'site-name', + '_AdminName' => '', // will be set later, when the user selects language + '_AdminPassword' => '', + '_AdminPasswordConfirm' => '', + '_AdminEmail' => '', + '_Subscribe' => false, + '_SkipOptional' => 'continue', + '_RightsProfile' => 'wiki', + '_LicenseCode' => 'none', + '_CCDone' => false, + '_Extensions' => [], + '_Skins' => [], + '_MemCachedServers' => '', + '_UpgradeKeySupplied' => false, + '_ExistingDBSettings' => false, + + // $wgLogo is probably wrong (T50084); set something that will work. + // Single quotes work fine here, as LocalSettingsGenerator outputs this unescaped. + 'wgLogo' => '$wgResourceBasePath/resources/assets/wiki.png', + 'wgAuthenticationTokenVersion' => 1, + ]; + + /** + * The actual list of installation steps. This will be initialized by getInstallSteps() + * + * @var array + */ + private $installSteps = []; + + /** + * Extra steps for installation, for things like DatabaseInstallers to modify + * + * @var array + */ + protected $extraInstallSteps = []; + + /** + * Known object cache types and the functions used to test for their existence. + * + * @var array + */ + protected $objectCaches = [ + 'apc' => 'apc_fetch', + 'apcu' => 'apcu_fetch', + 'wincache' => 'wincache_ucache_get' + ]; + + /** + * User rights profiles. + * + * @var array + */ + public $rightsProfiles = [ + 'wiki' => [], + 'no-anon' => [ + '*' => [ 'edit' => false ] + ], + 'fishbowl' => [ + '*' => [ + 'createaccount' => false, + 'edit' => false, + ], + ], + 'private' => [ + '*' => [ + 'createaccount' => false, + 'edit' => false, + 'read' => false, + ], + ], + ]; + + /** + * License types. + * + * @var array + */ + public $licenses = [ + 'cc-by' => [ + 'url' => 'https://creativecommons.org/licenses/by/4.0/', + 'icon' => '$wgResourceBasePath/resources/assets/licenses/cc-by.png', + ], + 'cc-by-sa' => [ + 'url' => 'https://creativecommons.org/licenses/by-sa/4.0/', + 'icon' => '$wgResourceBasePath/resources/assets/licenses/cc-by-sa.png', + ], + 'cc-by-nc-sa' => [ + 'url' => 'https://creativecommons.org/licenses/by-nc-sa/4.0/', + 'icon' => '$wgResourceBasePath/resources/assets/licenses/cc-by-nc-sa.png', + ], + 'cc-0' => [ + 'url' => 'https://creativecommons.org/publicdomain/zero/1.0/', + 'icon' => '$wgResourceBasePath/resources/assets/licenses/cc-0.png', + ], + 'gfdl' => [ + 'url' => 'https://www.gnu.org/copyleft/fdl.html', + 'icon' => '$wgResourceBasePath/resources/assets/licenses/gnu-fdl.png', + ], + 'none' => [ + 'url' => '', + 'icon' => '', + 'text' => '' + ], + 'cc-choose' => [ + // Details will be filled in by the selector. + 'url' => '', + 'icon' => '', + 'text' => '', + ], + ]; + + /** + * URL to mediawiki-announce subscription + */ + protected $mediaWikiAnnounceUrl = + 'https://lists.wikimedia.org/mailman/subscribe/mediawiki-announce'; + + /** + * Supported language codes for Mailman + */ + protected $mediaWikiAnnounceLanguages = [ + 'ca', 'cs', 'da', 'de', 'en', 'es', 'et', 'eu', 'fi', 'fr', 'hr', 'hu', + 'it', 'ja', 'ko', 'lt', 'nl', 'no', 'pl', 'pt', 'pt-br', 'ro', 'ru', + 'sl', 'sr', 'sv', 'tr', 'uk' + ]; + + /** + * UI interface for displaying a short message + * The parameters are like parameters to wfMessage(). + * The messages will be in wikitext format, which will be converted to an + * output format such as HTML or text before being sent to the user. + * @param string $msg + */ + abstract public function showMessage( $msg /*, ... */ ); + + /** + * Same as showMessage(), but for displaying errors + * @param string $msg + */ + abstract public function showError( $msg /*, ... */ ); + + /** + * Show a message to the installing user by using a Status object + * @param Status $status + */ + abstract public function showStatusMessage( Status $status ); + + /** + * Constructs a Config object that contains configuration settings that should be + * overwritten for the installation process. + * + * @since 1.27 + * + * @param Config $baseConfig + * + * @return Config The config to use during installation. + */ + public static function getInstallerConfig( Config $baseConfig ) { + $configOverrides = new HashConfig(); + + // disable (problematic) object cache types explicitly, preserving all other (working) ones + // bug T113843 + $emptyCache = [ 'class' => EmptyBagOStuff::class ]; + + $objectCaches = [ + CACHE_NONE => $emptyCache, + CACHE_DB => $emptyCache, + CACHE_ANYTHING => $emptyCache, + CACHE_MEMCACHED => $emptyCache, + ] + $baseConfig->get( 'ObjectCaches' ); + + $configOverrides->set( 'ObjectCaches', $objectCaches ); + + // Load the installer's i18n. + $messageDirs = $baseConfig->get( 'MessagesDirs' ); + $messageDirs['MediawikiInstaller'] = __DIR__ . '/i18n'; + + $configOverrides->set( 'MessagesDirs', $messageDirs ); + + $installerConfig = new MultiConfig( [ $configOverrides, $baseConfig ] ); + + // make sure we use the installer config as the main config + $configRegistry = $baseConfig->get( 'ConfigRegistry' ); + $configRegistry['main'] = function () use ( $installerConfig ) { + return $installerConfig; + }; + + $configOverrides->set( 'ConfigRegistry', $configRegistry ); + + return $installerConfig; + } + + /** + * Constructor, always call this from child classes. + */ + public function __construct() { + global $wgMemc, $wgUser, $wgObjectCaches; + + $defaultConfig = new GlobalVarConfig(); // all the stuff from DefaultSettings.php + $installerConfig = self::getInstallerConfig( $defaultConfig ); + + // Reset all services and inject config overrides + MediaWikiServices::resetGlobalInstance( $installerConfig ); + + // Don't attempt to load user language options (T126177) + // This will be overridden in the web installer with the user-specified language + RequestContext::getMain()->setLanguage( 'en' ); + + // Disable the i18n cache + // TODO: manage LocalisationCache singleton in MediaWikiServices + Language::getLocalisationCache()->disableBackend(); + + // Disable all global services, since we don't have any configuration yet! + MediaWikiServices::disableStorageBackend(); + + $mwServices = MediaWikiServices::getInstance(); + // Disable object cache (otherwise CACHE_ANYTHING will try CACHE_DB and + // SqlBagOStuff will then throw since we just disabled wfGetDB) + $wgObjectCaches = $mwServices->getMainConfig()->get( 'ObjectCaches' ); + $wgMemc = ObjectCache::getInstance( CACHE_NONE ); + + // Disable interwiki lookup, to avoid database access during parses + $mwServices->redefineService( 'InterwikiLookup', function () { + return new NullInterwikiLookup(); + } ); + + // Having a user with id = 0 safeguards us from DB access via User::loadOptions(). + $wgUser = User::newFromId( 0 ); + RequestContext::getMain()->setUser( $wgUser ); + + $this->settings = $this->internalDefaults; + + foreach ( $this->defaultVarNames as $var ) { + $this->settings[$var] = $GLOBALS[$var]; + } + + $this->doEnvironmentPreps(); + + $this->compiledDBs = []; + foreach ( self::getDBTypes() as $type ) { + $installer = $this->getDBInstaller( $type ); + + if ( !$installer->isCompiled() ) { + continue; + } + $this->compiledDBs[] = $type; + } + + $this->parserTitle = Title::newFromText( 'Installer' ); + $this->parserOptions = new ParserOptions( $wgUser ); // language will be wrong :( + // Don't try to access DB before user language is initialised + $this->setParserLanguage( Language::factory( 'en' ) ); + } + + /** + * Get a list of known DB types. + * + * @return array + */ + public static function getDBTypes() { + return self::$dbTypes; + } + + /** + * Do initial checks of the PHP environment. Set variables according to + * the observed environment. + * + * It's possible that this may be called under the CLI SAPI, not the SAPI + * that the wiki will primarily run under. In that case, the subclass should + * initialise variables such as wgScriptPath, before calling this function. + * + * Under the web subclass, it can already be assumed that PHP 5+ is in use + * and that sessions are working. + * + * @return Status + */ + public function doEnvironmentChecks() { + // Php version has already been checked by entry scripts + // Show message here for information purposes + if ( wfIsHHVM() ) { + $this->showMessage( 'config-env-hhvm', HHVM_VERSION ); + } else { + $this->showMessage( 'config-env-php', PHP_VERSION ); + } + + $good = true; + // Must go here because an old version of PCRE can prevent other checks from completing + list( $pcreVersion ) = explode( ' ', PCRE_VERSION, 2 ); + if ( version_compare( $pcreVersion, self::MINIMUM_PCRE_VERSION, '<' ) ) { + $this->showError( 'config-pcre-old', self::MINIMUM_PCRE_VERSION, $pcreVersion ); + $good = false; + } else { + foreach ( $this->envChecks as $check ) { + $status = $this->$check(); + if ( $status === false ) { + $good = false; + } + } + } + + $this->setVar( '_Environment', $good ); + + return $good ? Status::newGood() : Status::newFatal( 'config-env-bad' ); + } + + public function doEnvironmentPreps() { + foreach ( $this->envPreps as $prep ) { + $this->$prep(); + } + } + + /** + * Set a MW configuration variable, or internal installer configuration variable. + * + * @param string $name + * @param mixed $value + */ + public function setVar( $name, $value ) { + $this->settings[$name] = $value; + } + + /** + * Get an MW configuration variable, or internal installer configuration variable. + * The defaults come from $GLOBALS (ultimately DefaultSettings.php). + * Installer variables are typically prefixed by an underscore. + * + * @param string $name + * @param mixed $default + * + * @return mixed + */ + public function getVar( $name, $default = null ) { + if ( !isset( $this->settings[$name] ) ) { + return $default; + } else { + return $this->settings[$name]; + } + } + + /** + * Get a list of DBs supported by current PHP setup + * + * @return array + */ + public function getCompiledDBs() { + return $this->compiledDBs; + } + + /** + * Get the DatabaseInstaller class name for this type + * + * @param string $type database type ($wgDBtype) + * @return string Class name + * @since 1.30 + */ + public static function getDBInstallerClass( $type ) { + return ucfirst( $type ) . 'Installer'; + } + + /** + * Get an instance of DatabaseInstaller for the specified DB type. + * + * @param mixed $type DB installer for which is needed, false to use default. + * + * @return DatabaseInstaller + */ + public function getDBInstaller( $type = false ) { + if ( !$type ) { + $type = $this->getVar( 'wgDBtype' ); + } + + $type = strtolower( $type ); + + if ( !isset( $this->dbInstallers[$type] ) ) { + $class = self::getDBInstallerClass( $type ); + $this->dbInstallers[$type] = new $class( $this ); + } + + return $this->dbInstallers[$type]; + } + + /** + * Determine if LocalSettings.php exists. If it does, return its variables. + * + * @return array|false + */ + public static function getExistingLocalSettings() { + global $IP; + + // You might be wondering why this is here. Well if you don't do this + // then some poorly-formed extensions try to call their own classes + // after immediately registering them. We really need to get extension + // registration out of the global scope and into a real format. + // @see https://phabricator.wikimedia.org/T69440 + global $wgAutoloadClasses; + $wgAutoloadClasses = []; + + // LocalSettings.php should not call functions, except wfLoadSkin/wfLoadExtensions + // Define the required globals here, to ensure, the functions can do it work correctly. + // phpcs:ignore MediaWiki.VariableAnalysis.UnusedGlobalVariables + global $wgExtensionDirectory, $wgStyleDirectory; + + Wikimedia\suppressWarnings(); + $_lsExists = file_exists( "$IP/LocalSettings.php" ); + Wikimedia\restoreWarnings(); + + if ( !$_lsExists ) { + return false; + } + unset( $_lsExists ); + + require "$IP/includes/DefaultSettings.php"; + require "$IP/LocalSettings.php"; + + return get_defined_vars(); + } + + /** + * Get a fake password for sending back to the user in HTML. + * This is a security mechanism to avoid compromise of the password in the + * event of session ID compromise. + * + * @param string $realPassword + * + * @return string + */ + public function getFakePassword( $realPassword ) { + return str_repeat( '*', strlen( $realPassword ) ); + } + + /** + * Set a variable which stores a password, except if the new value is a + * fake password in which case leave it as it is. + * + * @param string $name + * @param mixed $value + */ + public function setPassword( $name, $value ) { + if ( !preg_match( '/^\*+$/', $value ) ) { + $this->setVar( $name, $value ); + } + } + + /** + * On POSIX systems return the primary group of the webserver we're running under. + * On other systems just returns null. + * + * This is used to advice the user that he should chgrp his mw-config/data/images directory as the + * webserver user before he can install. + * + * Public because SqliteInstaller needs it, and doesn't subclass Installer. + * + * @return mixed + */ + public static function maybeGetWebserverPrimaryGroup() { + if ( !function_exists( 'posix_getegid' ) || !function_exists( 'posix_getpwuid' ) ) { + # I don't know this, this isn't UNIX. + return null; + } + + # posix_getegid() *not* getmygid() because we want the group of the webserver, + # not whoever owns the current script. + $gid = posix_getegid(); + $group = posix_getpwuid( $gid )['name']; + + return $group; + } + + /** + * Convert wikitext $text to HTML. + * + * This is potentially error prone since many parser features require a complete + * installed MW database. The solution is to just not use those features when you + * write your messages. This appears to work well enough. Basic formatting and + * external links work just fine. + * + * But in case a translator decides to throw in a "#ifexist" or internal link or + * whatever, this function is guarded to catch the attempted DB access and to present + * some fallback text. + * + * @param string $text + * @param bool $lineStart + * @return string + */ + public function parse( $text, $lineStart = false ) { + global $wgParser; + + try { + $out = $wgParser->parse( $text, $this->parserTitle, $this->parserOptions, $lineStart ); + $html = $out->getText( [ + 'enableSectionEditLinks' => false, + 'unwrap' => true, + ] ); + } catch ( MediaWiki\Services\ServiceDisabledException $e ) { + $html = '<!--DB access attempted during parse--> ' . htmlspecialchars( $text ); + } + + return $html; + } + + /** + * @return ParserOptions + */ + public function getParserOptions() { + return $this->parserOptions; + } + + public function disableLinkPopups() { + $this->parserOptions->setExternalLinkTarget( false ); + } + + public function restoreLinkPopups() { + global $wgExternalLinkTarget; + $this->parserOptions->setExternalLinkTarget( $wgExternalLinkTarget ); + } + + /** + * Install step which adds a row to the site_stats table with appropriate + * initial values. + * + * @param DatabaseInstaller $installer + * + * @return Status + */ + public function populateSiteStats( DatabaseInstaller $installer ) { + $status = $installer->getConnection(); + if ( !$status->isOK() ) { + return $status; + } + $status->value->insert( + 'site_stats', + [ + 'ss_row_id' => 1, + 'ss_total_edits' => 0, + 'ss_good_articles' => 0, + 'ss_total_pages' => 0, + 'ss_users' => 0, + 'ss_active_users' => 0, + 'ss_images' => 0 + ], + __METHOD__, 'IGNORE' + ); + + return Status::newGood(); + } + + /** + * Environment check for DB types. + * @return bool + */ + protected function envCheckDB() { + global $wgLang; + + $allNames = []; + + // Messages: config-type-mysql, config-type-postgres, config-type-oracle, + // config-type-sqlite + foreach ( self::getDBTypes() as $name ) { + $allNames[] = wfMessage( "config-type-$name" )->text(); + } + + $databases = $this->getCompiledDBs(); + + $databases = array_flip( $databases ); + foreach ( array_keys( $databases ) as $db ) { + $installer = $this->getDBInstaller( $db ); + $status = $installer->checkPrerequisites(); + if ( !$status->isGood() ) { + $this->showStatusMessage( $status ); + } + if ( !$status->isOK() ) { + unset( $databases[$db] ); + } + } + $databases = array_flip( $databases ); + if ( !$databases ) { + $this->showError( 'config-no-db', $wgLang->commaList( $allNames ), count( $allNames ) ); + + // @todo FIXME: This only works for the web installer! + return false; + } + + return true; + } + + /** + * Some versions of libxml+PHP break < and > encoding horribly + * @return bool + */ + protected function envCheckBrokenXML() { + $test = new PhpXmlBugTester(); + if ( !$test->ok ) { + $this->showError( 'config-brokenlibxml' ); + + return false; + } + + return true; + } + + /** + * Environment check for the PCRE module. + * + * @note If this check were to fail, the parser would + * probably throw an exception before the result + * of this check is shown to the user. + * @return bool + */ + protected function envCheckPCRE() { + Wikimedia\suppressWarnings(); + $regexd = preg_replace( '/[\x{0430}-\x{04FF}]/iu', '', '-АБВГД-' ); + // Need to check for \p support too, as PCRE can be compiled + // with utf8 support, but not unicode property support. + // check that \p{Zs} (space separators) matches + // U+3000 (Ideographic space) + $regexprop = preg_replace( '/\p{Zs}/u', '', "-\xE3\x80\x80-" ); + Wikimedia\restoreWarnings(); + if ( $regexd != '--' || $regexprop != '--' ) { + $this->showError( 'config-pcre-no-utf8' ); + + return false; + } + + return true; + } + + /** + * Environment check for available memory. + * @return bool + */ + protected function envCheckMemory() { + $limit = ini_get( 'memory_limit' ); + + if ( !$limit || $limit == -1 ) { + return true; + } + + $n = wfShorthandToInteger( $limit ); + + if ( $n < $this->minMemorySize * 1024 * 1024 ) { + $newLimit = "{$this->minMemorySize}M"; + + if ( ini_set( "memory_limit", $newLimit ) === false ) { + $this->showMessage( 'config-memory-bad', $limit ); + } else { + $this->showMessage( 'config-memory-raised', $limit, $newLimit ); + $this->setVar( '_RaiseMemory', true ); + } + } + + return true; + } + + /** + * Environment check for compiled object cache types. + */ + protected function envCheckCache() { + $caches = []; + foreach ( $this->objectCaches as $name => $function ) { + if ( function_exists( $function ) ) { + $caches[$name] = true; + } + } + + if ( !$caches ) { + $key = 'config-no-cache-apcu'; + $this->showMessage( $key ); + } + + $this->setVar( '_Caches', $caches ); + } + + /** + * Scare user to death if they have mod_security or mod_security2 + * @return bool + */ + protected function envCheckModSecurity() { + if ( self::apacheModulePresent( 'mod_security' ) + || self::apacheModulePresent( 'mod_security2' ) ) { + $this->showMessage( 'config-mod-security' ); + } + + return true; + } + + /** + * Search for GNU diff3. + * @return bool + */ + protected function envCheckDiff3() { + $names = [ "gdiff3", "diff3" ]; + if ( wfIsWindows() ) { + $names[] = 'diff3.exe'; + } + $versionInfo = [ '--version', 'GNU diffutils' ]; + + $diff3 = ExecutableFinder::findInDefaultPaths( $names, $versionInfo ); + + if ( $diff3 ) { + $this->setVar( 'wgDiff3', $diff3 ); + } else { + $this->setVar( 'wgDiff3', false ); + $this->showMessage( 'config-diff3-bad' ); + } + + return true; + } + + /** + * Environment check for ImageMagick and GD. + * @return bool + */ + protected function envCheckGraphics() { + $names = wfIsWindows() ? 'convert.exe' : 'convert'; + $versionInfo = [ '-version', 'ImageMagick' ]; + $convert = ExecutableFinder::findInDefaultPaths( $names, $versionInfo ); + + $this->setVar( 'wgImageMagickConvertCommand', '' ); + if ( $convert ) { + $this->setVar( 'wgImageMagickConvertCommand', $convert ); + $this->showMessage( 'config-imagemagick', $convert ); + + return true; + } elseif ( function_exists( 'imagejpeg' ) ) { + $this->showMessage( 'config-gd' ); + } else { + $this->showMessage( 'config-no-scaling' ); + } + + return true; + } + + /** + * Search for git. + * + * @since 1.22 + * @return bool + */ + protected function envCheckGit() { + $names = wfIsWindows() ? 'git.exe' : 'git'; + $versionInfo = [ '--version', 'git version' ]; + + $git = ExecutableFinder::findInDefaultPaths( $names, $versionInfo ); + + if ( $git ) { + $this->setVar( 'wgGitBin', $git ); + $this->showMessage( 'config-git', $git ); + } else { + $this->setVar( 'wgGitBin', false ); + $this->showMessage( 'config-git-bad' ); + } + + return true; + } + + /** + * Environment check to inform user which server we've assumed. + * + * @return bool + */ + protected function envCheckServer() { + $server = $this->envGetDefaultServer(); + if ( $server !== null ) { + $this->showMessage( 'config-using-server', $server ); + } + return true; + } + + /** + * Environment check to inform user which paths we've assumed. + * + * @return bool + */ + protected function envCheckPath() { + $this->showMessage( + 'config-using-uri', + $this->getVar( 'wgServer' ), + $this->getVar( 'wgScriptPath' ) + ); + return true; + } + + /** + * Environment check for preferred locale in shell + * @return bool + */ + protected function envCheckShellLocale() { + $os = php_uname( 's' ); + $supported = [ 'Linux', 'SunOS', 'HP-UX', 'Darwin' ]; # Tested these + + if ( !in_array( $os, $supported ) ) { + return true; + } + + if ( Shell::isDisabled() ) { + return true; + } + + # Get a list of available locales. + $result = Shell::command( '/usr/bin/locale', '-a' ) + ->execute(); + + if ( $result->getExitCode() != 0 ) { + return true; + } + + $lines = $result->getStdout(); + $lines = array_map( 'trim', explode( "\n", $lines ) ); + $candidatesByLocale = []; + $candidatesByLang = []; + foreach ( $lines as $line ) { + if ( $line === '' ) { + continue; + } + + if ( !preg_match( '/^([a-zA-Z]+)(_[a-zA-Z]+|)\.(utf8|UTF-8)(@[a-zA-Z_]*|)$/i', $line, $m ) ) { + continue; + } + + list( , $lang, , , ) = $m; + + $candidatesByLocale[$m[0]] = $m; + $candidatesByLang[$lang][] = $m; + } + + # Try the current value of LANG. + if ( isset( $candidatesByLocale[getenv( 'LANG' )] ) ) { + $this->setVar( 'wgShellLocale', getenv( 'LANG' ) ); + + return true; + } + + # Try the most common ones. + $commonLocales = [ 'C.UTF-8', 'en_US.UTF-8', 'en_US.utf8', 'de_DE.UTF-8', 'de_DE.utf8' ]; + foreach ( $commonLocales as $commonLocale ) { + if ( isset( $candidatesByLocale[$commonLocale] ) ) { + $this->setVar( 'wgShellLocale', $commonLocale ); + + return true; + } + } + + # Is there an available locale in the Wiki's language? + $wikiLang = $this->getVar( 'wgLanguageCode' ); + + if ( isset( $candidatesByLang[$wikiLang] ) ) { + $m = reset( $candidatesByLang[$wikiLang] ); + $this->setVar( 'wgShellLocale', $m[0] ); + + return true; + } + + # Are there any at all? + if ( count( $candidatesByLocale ) ) { + $m = reset( $candidatesByLocale ); + $this->setVar( 'wgShellLocale', $m[0] ); + + return true; + } + + # Give up. + return true; + } + + /** + * Environment check for the permissions of the uploads directory + * @return bool + */ + protected function envCheckUploadsDirectory() { + global $IP; + + $dir = $IP . '/images/'; + $url = $this->getVar( 'wgServer' ) . $this->getVar( 'wgScriptPath' ) . '/images/'; + $safe = !$this->dirIsExecutable( $dir, $url ); + + if ( !$safe ) { + $this->showMessage( 'config-uploads-not-safe', $dir ); + } + + return true; + } + + /** + * Checks if suhosin.get.max_value_length is set, and if so generate + * a warning because it decreases ResourceLoader performance. + * @return bool + */ + protected function envCheckSuhosinMaxValueLength() { + $maxValueLength = ini_get( 'suhosin.get.max_value_length' ); + if ( $maxValueLength > 0 && $maxValueLength < 1024 ) { + // Only warn if the value is below the sane 1024 + $this->showMessage( 'config-suhosin-max-value-length', $maxValueLength ); + } + + return true; + } + + /** + * Checks if we're running on 64 bit or not. 32 bit is becoming increasingly + * hard to support, so let's at least warn people. + * + * @return bool + */ + protected function envCheck64Bit() { + if ( PHP_INT_SIZE == 4 ) { + $this->showMessage( 'config-using-32bit' ); + } + + return true; + } + + /** + * Convert a hex string representing a Unicode code point to that code point. + * @param string $c + * @return string|false + */ + protected function unicodeChar( $c ) { + $c = hexdec( $c ); + if ( $c <= 0x7F ) { + return chr( $c ); + } elseif ( $c <= 0x7FF ) { + return chr( 0xC0 | $c >> 6 ) . chr( 0x80 | $c & 0x3F ); + } elseif ( $c <= 0xFFFF ) { + return chr( 0xE0 | $c >> 12 ) . chr( 0x80 | $c >> 6 & 0x3F ) . + chr( 0x80 | $c & 0x3F ); + } elseif ( $c <= 0x10FFFF ) { + return chr( 0xF0 | $c >> 18 ) . chr( 0x80 | $c >> 12 & 0x3F ) . + chr( 0x80 | $c >> 6 & 0x3F ) . + chr( 0x80 | $c & 0x3F ); + } else { + return false; + } + } + + /** + * Check the libicu version + */ + protected function envCheckLibicu() { + /** + * This needs to be updated something that the latest libicu + * will properly normalize. This normalization was found at + * http://www.unicode.org/versions/Unicode5.2.0/#Character_Additions + * Note that we use the hex representation to create the code + * points in order to avoid any Unicode-destroying during transit. + */ + $not_normal_c = $this->unicodeChar( "FA6C" ); + $normal_c = $this->unicodeChar( "242EE" ); + + $useNormalizer = 'php'; + $needsUpdate = false; + + if ( function_exists( 'normalizer_normalize' ) ) { + $useNormalizer = 'intl'; + $intl = normalizer_normalize( $not_normal_c, Normalizer::FORM_C ); + if ( $intl !== $normal_c ) { + $needsUpdate = true; + } + } + + // Uses messages 'config-unicode-using-php' and 'config-unicode-using-intl' + if ( $useNormalizer === 'php' ) { + $this->showMessage( 'config-unicode-pure-php-warning' ); + } else { + $this->showMessage( 'config-unicode-using-' . $useNormalizer ); + if ( $needsUpdate ) { + $this->showMessage( 'config-unicode-update-warning' ); + } + } + } + + /** + * Environment prep for the server hostname. + */ + protected function envPrepServer() { + $server = $this->envGetDefaultServer(); + if ( $server !== null ) { + $this->setVar( 'wgServer', $server ); + } + } + + /** + * Helper function to be called from envPrepServer() + * @return string + */ + abstract protected function envGetDefaultServer(); + + /** + * Environment prep for setting $IP and $wgScriptPath. + */ + protected function envPrepPath() { + global $IP; + $IP = dirname( dirname( __DIR__ ) ); + $this->setVar( 'IP', $IP ); + } + + /** + * Checks if scripts located in the given directory can be executed via the given URL. + * + * Used only by environment checks. + * @param string $dir + * @param string $url + * @return bool|int|string + */ + public function dirIsExecutable( $dir, $url ) { + $scriptTypes = [ + 'php' => [ + "<?php echo 'ex' . 'ec';", + "#!/var/env php\n<?php echo 'ex' . 'ec';", + ], + ]; + + // it would be good to check other popular languages here, but it'll be slow. + + Wikimedia\suppressWarnings(); + + foreach ( $scriptTypes as $ext => $contents ) { + foreach ( $contents as $source ) { + $file = 'exectest.' . $ext; + + if ( !file_put_contents( $dir . $file, $source ) ) { + break; + } + + try { + $text = Http::get( $url . $file, [ 'timeout' => 3 ], __METHOD__ ); + } catch ( Exception $e ) { + // Http::get throws with allow_url_fopen = false and no curl extension. + $text = null; + } + unlink( $dir . $file ); + + if ( $text == 'exec' ) { + Wikimedia\restoreWarnings(); + + return $ext; + } + } + } + + Wikimedia\restoreWarnings(); + + return false; + } + + /** + * Checks for presence of an Apache module. Works only if PHP is running as an Apache module, too. + * + * @param string $moduleName Name of module to check. + * @return bool + */ + public static function apacheModulePresent( $moduleName ) { + if ( function_exists( 'apache_get_modules' ) && in_array( $moduleName, apache_get_modules() ) ) { + return true; + } + // try it the hard way + ob_start(); + phpinfo( INFO_MODULES ); + $info = ob_get_clean(); + + return strpos( $info, $moduleName ) !== false; + } + + /** + * ParserOptions are constructed before we determined the language, so fix it + * + * @param Language $lang + */ + public function setParserLanguage( $lang ) { + $this->parserOptions->setTargetLanguage( $lang ); + $this->parserOptions->setUserLang( $lang ); + } + + /** + * Overridden by WebInstaller to provide lastPage parameters. + * @param string $page + * @return string + */ + protected function getDocUrl( $page ) { + return "{$_SERVER['PHP_SELF']}?page=" . urlencode( $page ); + } + + /** + * Finds extensions that follow the format /$directory/Name/Name.php, + * and returns an array containing the value for 'Name' for each found extension. + * + * Reasonable values for $directory include 'extensions' (the default) and 'skins'. + * + * @param string $directory Directory to search in + * @return array [ $extName => [ 'screenshots' => [ '...' ] ] + */ + public function findExtensions( $directory = 'extensions' ) { + if ( $this->getVar( 'IP' ) === null ) { + return []; + } + + $extDir = $this->getVar( 'IP' ) . '/' . $directory; + if ( !is_readable( $extDir ) || !is_dir( $extDir ) ) { + return []; + } + + // extensions -> extension.json, skins -> skin.json + $jsonFile = substr( $directory, 0, strlen( $directory ) - 1 ) . '.json'; + + $dh = opendir( $extDir ); + $exts = []; + while ( ( $file = readdir( $dh ) ) !== false ) { + if ( !is_dir( "$extDir/$file" ) ) { + continue; + } + $fullJsonFile = "$extDir/$file/$jsonFile"; + $isJson = file_exists( $fullJsonFile ); + $isPhp = false; + if ( !$isJson ) { + // Only fallback to PHP file if JSON doesn't exist + $fullPhpFile = "$extDir/$file/$file.php"; + $isPhp = file_exists( $fullPhpFile ); + } + if ( $isJson || $isPhp ) { + // Extension exists. Now see if there are screenshots + $exts[$file] = []; + if ( is_dir( "$extDir/$file/screenshots" ) ) { + $paths = glob( "$extDir/$file/screenshots/*.png" ); + foreach ( $paths as $path ) { + $exts[$file]['screenshots'][] = str_replace( $extDir, "../$directory", $path ); + } + + } + } + if ( $isJson ) { + $info = $this->readExtension( $fullJsonFile ); + if ( $info === false ) { + continue; + } + $exts[$file] += $info; + } + } + closedir( $dh ); + uksort( $exts, 'strnatcasecmp' ); + + return $exts; + } + + /** + * @param string $fullJsonFile + * @param array $extDeps + * @param array $skinDeps + * + * @return array|bool False if this extension can't be loaded + */ + private function readExtension( $fullJsonFile, $extDeps = [], $skinDeps = [] ) { + $load = [ + $fullJsonFile => 1 + ]; + if ( $extDeps ) { + $extDir = $this->getVar( 'IP' ) . '/extensions'; + foreach ( $extDeps as $dep ) { + $fname = "$extDir/$dep/extension.json"; + if ( !file_exists( $fname ) ) { + return false; + } + $load[$fname] = 1; + } + } + if ( $skinDeps ) { + $skinDir = $this->getVar( 'IP' ) . '/skins'; + foreach ( $skinDeps as $dep ) { + $fname = "$skinDir/$dep/skin.json"; + if ( !file_exists( $fname ) ) { + return false; + } + $load[$fname] = 1; + } + } + $registry = new ExtensionRegistry(); + try { + $info = $registry->readFromQueue( $load ); + } catch ( ExtensionDependencyError $e ) { + if ( $e->incompatibleCore || $e->incompatibleSkins + || $e->incompatibleExtensions + ) { + // If something is incompatible with a dependency, we have no real + // option besides skipping it + return false; + } elseif ( $e->missingExtensions || $e->missingSkins ) { + // There's an extension missing in the dependency tree, + // so add those to the dependency list and try again + return $this->readExtension( + $fullJsonFile, + array_merge( $extDeps, $e->missingExtensions ), + array_merge( $skinDeps, $e->missingSkins ) + ); + } + // Some other kind of dependency error? + return false; + } + $ret = []; + // The order of credits will be the order of $load, + // so the first extension is the one we want to load, + // everything else is a dependency + $i = 0; + foreach ( $info['credits'] as $name => $credit ) { + $i++; + if ( $i == 1 ) { + // Extension we want to load + continue; + } + $type = basename( $credit['path'] ) === 'skin.json' ? 'skins' : 'extensions'; + $ret['requires'][$type][] = $credit['name']; + } + $credits = array_values( $info['credits'] )[0]; + if ( isset( $credits['url'] ) ) { + $ret['url'] = $credits['url']; + } + $ret['type'] = $credits['type']; + + return $ret; + } + + /** + * Returns a default value to be used for $wgDefaultSkin: normally the one set in DefaultSettings, + * but will fall back to another if the default skin is missing and some other one is present + * instead. + * + * @param string[] $skinNames Names of installed skins. + * @return string + */ + public function getDefaultSkin( array $skinNames ) { + $defaultSkin = $GLOBALS['wgDefaultSkin']; + if ( !$skinNames || in_array( $defaultSkin, $skinNames ) ) { + return $defaultSkin; + } else { + return $skinNames[0]; + } + } + + /** + * Installs the auto-detected extensions. + * + * @return Status + */ + protected function includeExtensions() { + global $IP; + $exts = $this->getVar( '_Extensions' ); + $IP = $this->getVar( 'IP' ); + + // Marker for DatabaseUpdater::loadExtensions so we don't + // double load extensions + define( 'MW_EXTENSIONS_LOADED', true ); + + /** + * We need to include DefaultSettings before including extensions to avoid + * warnings about unset variables. However, the only thing we really + * want here is $wgHooks['LoadExtensionSchemaUpdates']. This won't work + * if the extension has hidden hook registration in $wgExtensionFunctions, + * but we're not opening that can of worms + * @see https://phabricator.wikimedia.org/T28857 + */ + global $wgAutoloadClasses; + $wgAutoloadClasses = []; + $queue = []; + + require "$IP/includes/DefaultSettings.php"; + + foreach ( $exts as $e ) { + if ( file_exists( "$IP/extensions/$e/extension.json" ) ) { + $queue["$IP/extensions/$e/extension.json"] = 1; + } else { + require_once "$IP/extensions/$e/$e.php"; + } + } + + $registry = new ExtensionRegistry(); + $data = $registry->readFromQueue( $queue ); + $wgAutoloadClasses += $data['autoload']; + + $hooksWeWant = isset( $wgHooks['LoadExtensionSchemaUpdates'] ) ? + /** @suppress PhanUndeclaredVariable $wgHooks is set by DefaultSettings */ + $wgHooks['LoadExtensionSchemaUpdates'] : []; + + if ( isset( $data['globals']['wgHooks']['LoadExtensionSchemaUpdates'] ) ) { + $hooksWeWant = array_merge_recursive( + $hooksWeWant, + $data['globals']['wgHooks']['LoadExtensionSchemaUpdates'] + ); + } + // Unset everyone else's hooks. Lord knows what someone might be doing + // in ParserFirstCallInit (see T29171) + $GLOBALS['wgHooks'] = [ 'LoadExtensionSchemaUpdates' => $hooksWeWant ]; + + return Status::newGood(); + } + + /** + * Get an array of install steps. Should always be in the format of + * [ + * 'name' => 'someuniquename', + * 'callback' => [ $obj, 'method' ], + * ] + * There must be a config-install-$name message defined per step, which will + * be shown on install. + * + * @param DatabaseInstaller $installer DatabaseInstaller so we can make callbacks + * @return array + */ + protected function getInstallSteps( DatabaseInstaller $installer ) { + $coreInstallSteps = [ + [ 'name' => 'database', 'callback' => [ $installer, 'setupDatabase' ] ], + [ 'name' => 'tables', 'callback' => [ $installer, 'createTables' ] ], + [ 'name' => 'interwiki', 'callback' => [ $installer, 'populateInterwikiTable' ] ], + [ 'name' => 'stats', 'callback' => [ $this, 'populateSiteStats' ] ], + [ 'name' => 'keys', 'callback' => [ $this, 'generateKeys' ] ], + [ 'name' => 'updates', 'callback' => [ $installer, 'insertUpdateKeys' ] ], + [ 'name' => 'sysop', 'callback' => [ $this, 'createSysop' ] ], + [ 'name' => 'mainpage', 'callback' => [ $this, 'createMainpage' ] ], + ]; + + // Build the array of install steps starting from the core install list, + // then adding any callbacks that wanted to attach after a given step + foreach ( $coreInstallSteps as $step ) { + $this->installSteps[] = $step; + if ( isset( $this->extraInstallSteps[$step['name']] ) ) { + $this->installSteps = array_merge( + $this->installSteps, + $this->extraInstallSteps[$step['name']] + ); + } + } + + // Prepend any steps that want to be at the beginning + if ( isset( $this->extraInstallSteps['BEGINNING'] ) ) { + $this->installSteps = array_merge( + $this->extraInstallSteps['BEGINNING'], + $this->installSteps + ); + } + + // Extensions should always go first, chance to tie into hooks and such + if ( count( $this->getVar( '_Extensions' ) ) ) { + array_unshift( $this->installSteps, + [ 'name' => 'extensions', 'callback' => [ $this, 'includeExtensions' ] ] + ); + $this->installSteps[] = [ + 'name' => 'extension-tables', + 'callback' => [ $installer, 'createExtensionTables' ] + ]; + } + + return $this->installSteps; + } + + /** + * Actually perform the installation. + * + * @param callable $startCB A callback array for the beginning of each step + * @param callable $endCB A callback array for the end of each step + * + * @return array Array of Status objects + */ + public function performInstallation( $startCB, $endCB ) { + $installResults = []; + $installer = $this->getDBInstaller(); + $installer->preInstall(); + $steps = $this->getInstallSteps( $installer ); + foreach ( $steps as $stepObj ) { + $name = $stepObj['name']; + call_user_func_array( $startCB, [ $name ] ); + + // Perform the callback step + $status = call_user_func( $stepObj['callback'], $installer ); + + // Output and save the results + call_user_func( $endCB, $name, $status ); + $installResults[$name] = $status; + + // If we've hit some sort of fatal, we need to bail. + // Callback already had a chance to do output above. + if ( !$status->isOk() ) { + break; + } + } + if ( $status->isOk() ) { + $this->showMessage( + 'config-install-success', + $this->getVar( 'wgServer' ), + $this->getVar( 'wgScriptPath' ) + ); + $this->setVar( '_InstallDone', true ); + } + + return $installResults; + } + + /** + * Generate $wgSecretKey. Will warn if we had to use an insecure random source. + * + * @return Status + */ + public function generateKeys() { + $keys = [ 'wgSecretKey' => 64 ]; + if ( strval( $this->getVar( 'wgUpgradeKey' ) ) === '' ) { + $keys['wgUpgradeKey'] = 16; + } + + return $this->doGenerateKeys( $keys ); + } + + /** + * Generate a secret value for variables using our CryptRand generator. + * Produce a warning if the random source was insecure. + * + * @param array $keys + * @return Status + */ + protected function doGenerateKeys( $keys ) { + $status = Status::newGood(); + + $strong = true; + foreach ( $keys as $name => $length ) { + $secretKey = MWCryptRand::generateHex( $length, true ); + if ( !MWCryptRand::wasStrong() ) { + $strong = false; + } + + $this->setVar( $name, $secretKey ); + } + + if ( !$strong ) { + $names = array_keys( $keys ); + $names = preg_replace( '/^(.*)$/', '\$$1', $names ); + global $wgLang; + $status->warning( 'config-insecure-keys', $wgLang->listToText( $names ), count( $names ) ); + } + + return $status; + } + + /** + * Create the first user account, grant it sysop and bureaucrat rights + * + * @return Status + */ + protected function createSysop() { + $name = $this->getVar( '_AdminName' ); + $user = User::newFromName( $name ); + + if ( !$user ) { + // We should've validated this earlier anyway! + return Status::newFatal( 'config-admin-error-user', $name ); + } + + if ( $user->idForName() == 0 ) { + $user->addToDatabase(); + + try { + $user->setPassword( $this->getVar( '_AdminPassword' ) ); + } catch ( PasswordError $pwe ) { + return Status::newFatal( 'config-admin-error-password', $name, $pwe->getMessage() ); + } + + $user->addGroup( 'sysop' ); + $user->addGroup( 'bureaucrat' ); + if ( $this->getVar( '_AdminEmail' ) ) { + $user->setEmail( $this->getVar( '_AdminEmail' ) ); + } + $user->saveSettings(); + + // Update user count + $ssUpdate = SiteStatsUpdate::factory( [ 'users' => 1 ] ); + $ssUpdate->doUpdate(); + } + $status = Status::newGood(); + + if ( $this->getVar( '_Subscribe' ) && $this->getVar( '_AdminEmail' ) ) { + $this->subscribeToMediaWikiAnnounce( $status ); + } + + return $status; + } + + /** + * @param Status $s + */ + private function subscribeToMediaWikiAnnounce( Status $s ) { + $params = [ + 'email' => $this->getVar( '_AdminEmail' ), + 'language' => 'en', + 'digest' => 0 + ]; + + // Mailman doesn't support as many languages as we do, so check to make + // sure their selected language is available + $myLang = $this->getVar( '_UserLang' ); + if ( in_array( $myLang, $this->mediaWikiAnnounceLanguages ) ) { + $myLang = $myLang == 'pt-br' ? 'pt_BR' : $myLang; // rewrite to Mailman's pt_BR + $params['language'] = $myLang; + } + + if ( MWHttpRequest::canMakeRequests() ) { + $res = MWHttpRequest::factory( $this->mediaWikiAnnounceUrl, + [ 'method' => 'POST', 'postData' => $params ], __METHOD__ )->execute(); + if ( !$res->isOK() ) { + $s->warning( 'config-install-subscribe-fail', $res->getMessage() ); + } + } else { + $s->warning( 'config-install-subscribe-notpossible' ); + } + } + + /** + * Insert Main Page with default content. + * + * @param DatabaseInstaller $installer + * @return Status + */ + protected function createMainpage( DatabaseInstaller $installer ) { + $status = Status::newGood(); + $title = Title::newMainPage(); + if ( $title->exists() ) { + $status->warning( 'config-install-mainpage-exists' ); + return $status; + } + try { + $page = WikiPage::factory( $title ); + $content = new WikitextContent( + wfMessage( 'mainpagetext' )->inContentLanguage()->text() . "\n\n" . + wfMessage( 'mainpagedocfooter' )->inContentLanguage()->text() + ); + + $status = $page->doEditContent( $content, + '', + EDIT_NEW, + false, + User::newFromName( 'MediaWiki default' ) + ); + } catch ( Exception $e ) { + // using raw, because $wgShowExceptionDetails can not be set yet + $status->fatal( 'config-install-mainpage-failed', $e->getMessage() ); + } + + return $status; + } + + /** + * Override the necessary bits of the config to run an installation. + */ + public static function overrideConfig() { + // Use PHP's built-in session handling, since MediaWiki's + // SessionHandler can't work before we have an object cache set up. + define( 'MW_NO_SESSION_HANDLER', 1 ); + + // Don't access the database + $GLOBALS['wgUseDatabaseMessages'] = false; + // Don't cache langconv tables + $GLOBALS['wgLanguageConverterCacheType'] = CACHE_NONE; + // Debug-friendly + $GLOBALS['wgShowExceptionDetails'] = true; + // Don't break forms + $GLOBALS['wgExternalLinkTarget'] = '_blank'; + + // Extended debugging + $GLOBALS['wgShowSQLErrors'] = true; + $GLOBALS['wgShowDBErrorBacktrace'] = true; + + // Allow multiple ob_flush() calls + $GLOBALS['wgDisableOutputCompression'] = true; + + // Use a sensible cookie prefix (not my_wiki) + $GLOBALS['wgCookiePrefix'] = 'mw_installer'; + + // Some of the environment checks make shell requests, remove limits + $GLOBALS['wgMaxShellMemory'] = 0; + + // Override the default CookieSessionProvider with a dummy + // implementation that won't stomp on PHP's cookies. + $GLOBALS['wgSessionProviders'] = [ + [ + 'class' => InstallerSessionProvider::class, + 'args' => [ [ + 'priority' => 1, + ] ] + ] + ]; + + // Don't try to use any object cache for SessionManager either. + $GLOBALS['wgSessionCacheType'] = CACHE_NONE; + } + + /** + * Add an installation step following the given step. + * + * @param callable $callback A valid installation callback array, in this form: + * [ 'name' => 'some-unique-name', 'callback' => [ $obj, 'function' ] ]; + * @param string $findStep The step to find. Omit to put the step at the beginning + */ + public function addInstallStep( $callback, $findStep = 'BEGINNING' ) { + $this->extraInstallSteps[$findStep][] = $callback; + } + + /** + * Disable the time limit for execution. + * Some long-running pages (Install, Upgrade) will want to do this + */ + protected function disableTimeLimit() { + Wikimedia\suppressWarnings(); + set_time_limit( 0 ); + Wikimedia\restoreWarnings(); + } +} |