*/
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' ];
+
+ $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 );
+
+ return new MultiConfig( [ $configOverrides, $baseConfig ] );
+ }
+
/**
* Constructor, always call this from child classes.
*/
public function __construct() {
- global $wgMessagesDirs, $wgUser;
+ global $wgMemc, $wgUser;
+
+ $defaultConfig = new GlobalVarConfig(); // all the stuff from DefaultSettings.php
+ $installerConfig = self::getInstallerConfig( $defaultConfig );
+
+ // Reset all services and inject config overrides
+ MediaWiki\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 LoadBalancer and wfGetDB etc.
- LBFactory::disableBackend();
+
+ // Disable all global services, since we don't have any configuration yet!
+ MediaWiki\MediaWikiServices::disableStorageBackend();
// Disable object cache (otherwise CACHE_ANYTHING will try CACHE_DB and
// SqlBagOStuff will then throw since we just disabled wfGetDB)
- $GLOBALS['wgMemc'] = new EmptyBagOStuff;
- ObjectCache::clear();
- $emptyCache = [ 'class' => 'EmptyBagOStuff' ];
- // disable (problematic) object cache types explicitly, preserving all other (working) ones
- // bug T113843
- $GLOBALS['wgObjectCaches'] = [
- CACHE_NONE => $emptyCache,
- CACHE_DB => $emptyCache,
- CACHE_ANYTHING => $emptyCache,
- CACHE_MEMCACHED => $emptyCache,
- ] + $GLOBALS['wgObjectCaches'];
-
- // Load the installer's i18n.
- $wgMessagesDirs['MediawikiInstaller'] = __DIR__ . '/i18n';
+ $wgMemc = ObjectCache::getInstance( CACHE_NONE );
// Having a user with id = 0 safeguards us from DB access via User::loadOptions().
$wgUser = User::newFromId( 0 );