fab78547ad
And deprecated aliases for the the no namespaced classes. ReplicatedBagOStuff that already is deprecated isn't moved. Bug: T353458 Change-Id: Ie01962517e5b53e59b9721e9996d4f1ea95abb51
715 lines
18 KiB
PHP
715 lines
18 KiB
PHP
<?php
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use Composer\Semver\Semver;
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use MediaWiki\Settings\SettingsBuilder;
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use MediaWiki\Shell\Shell;
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use MediaWiki\ShellDisabledError;
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use MediaWiki\WikiMap\WikiMap;
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use Wikimedia\ObjectCache\BagOStuff;
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use Wikimedia\ScopedCallback;
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/**
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* @defgroup ExtensionRegistry ExtensionRegistry
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*
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* For higher level documentation, see <https://www.mediawiki.org/wiki/Manual:Extension_registration/Architecture>.
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*/
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/**
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* Load JSON files, and uses a Processor to extract information.
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*
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* This also adds the extension's classes to the AutoLoader.
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*
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* @ingroup ExtensionRegistry
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* @since 1.25
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*/
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class ExtensionRegistry {
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/**
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* "requires" key that applies to MediaWiki core
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*/
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public const MEDIAWIKI_CORE = 'MediaWiki';
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/**
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* Version of the highest supported manifest version
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* Note: Update MANIFEST_VERSION_MW_VERSION when changing this
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*/
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public const MANIFEST_VERSION = 2;
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/**
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* MediaWiki version constraint representing what the current
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* highest MANIFEST_VERSION is supported in
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*/
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public const MANIFEST_VERSION_MW_VERSION = '>= 1.29.0';
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/**
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* Version of the oldest supported manifest version
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*/
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public const OLDEST_MANIFEST_VERSION = 1;
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/**
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* Bump whenever the registration cache needs resetting
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*/
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private const CACHE_VERSION = 8;
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private const CACHE_EXPIRY = 60 * 60 * 24;
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/**
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* Special key that defines the merge strategy
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*
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* @since 1.26
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*/
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public const MERGE_STRATEGY = '_merge_strategy';
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/**
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* Attributes that should be lazy-loaded
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*/
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private const LAZY_LOADED_ATTRIBUTES = [
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'TrackingCategories',
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'QUnitTestModules',
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'SkinLessImportPaths',
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];
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/**
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* Array of loaded things, keyed by name, values are credits information.
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*
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* The keys that the credit info arrays may have is defined
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* by ExtensionProcessor::CREDIT_ATTRIBS (plus a 'path' key that
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* points to the skin or extension JSON file).
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*
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* This info may be accessed via ExtensionRegistry::getAllThings.
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*
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* @var array[]
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*/
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private $loaded = [];
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/**
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* List of paths that should be loaded
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*
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* @var int[]
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*/
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protected $queued = [];
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/**
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* Whether we are done loading things
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*
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* @var bool
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*/
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private $finished = false;
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/**
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* Items in the JSON file that aren't being
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* set as globals
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*
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* @var array
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*/
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protected $attributes = [];
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/**
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* Attributes for testing
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*
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* @var array
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*/
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protected $testAttributes = [];
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/**
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* Lazy-loaded attributes
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*
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* @var array
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*/
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protected $lazyAttributes = [];
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/**
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* The hash of cache-varying options, lazy-initialised
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*
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* @var string|null
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*/
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private $varyHash;
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/**
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* Whether to check dev-requires
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*
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* @var bool
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*/
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protected $checkDev = false;
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/**
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* Whether test classes and namespaces should be added to the auto loader
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*
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* @var bool
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*/
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protected $loadTestClassesAndNamespaces = false;
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/**
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* @var ExtensionRegistry
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*/
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private static $instance;
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/**
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* @var ?BagOStuff
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*/
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private $cache = null;
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/**
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* @var ?SettingsBuilder
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*/
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private ?SettingsBuilder $settingsBuilder = null;
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private static bool $accessDisabledForUnitTests = false;
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/**
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* @codeCoverageIgnore
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* @return ExtensionRegistry
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*/
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public static function getInstance() {
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if ( self::$accessDisabledForUnitTests ) {
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throw new RuntimeException( 'Access is disabled in unit tests' );
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}
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if ( self::$instance === null ) {
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self::$instance = new self();
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}
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return self::$instance;
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}
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/**
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* @internal
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*/
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public static function disableForTest(): void {
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if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
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throw new RuntimeException( 'Can only be called in tests' );
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}
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self::$accessDisabledForUnitTests = true;
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}
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/**
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* @internal
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*/
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public static function enableForTest(): void {
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if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
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throw new RuntimeException( 'Can only be called in tests' );
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}
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self::$accessDisabledForUnitTests = false;
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}
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/**
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* Set the cache to use for extension info.
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* Intended for use during testing.
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*
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* @internal
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*
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* @param BagOStuff $cache
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*/
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public function setCache( BagOStuff $cache ): void {
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$this->cache = $cache;
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}
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/**
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* @since 1.34
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* @param bool $check
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*/
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public function setCheckDevRequires( $check ) {
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$this->checkDev = $check;
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$this->invalidateProcessCache();
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}
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/**
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* Controls if classes and namespaces defined under the keys TestAutoloadClasses and
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* TestAutoloadNamespaces should be added to the autoloader.
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*
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* @since 1.35
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* @param bool $load
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*/
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public function setLoadTestClassesAndNamespaces( $load ) {
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$this->loadTestClassesAndNamespaces = $load;
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}
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/**
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* @param string $path Absolute path to the JSON file
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*/
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public function queue( $path ) {
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global $wgExtensionInfoMTime;
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$mtime = $wgExtensionInfoMTime;
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if ( $mtime === false ) {
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// phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
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$mtime = @filemtime( $path );
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// @codeCoverageIgnoreStart
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if ( $mtime === false ) {
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$err = error_get_last();
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throw new MissingExtensionException( $path, $err['message'] );
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// @codeCoverageIgnoreEnd
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}
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}
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$this->queued[$path] = $mtime;
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$this->invalidateProcessCache();
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}
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private function getCache(): BagOStuff {
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if ( !$this->cache ) {
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// NOTE: Copy of ObjectCacheFactory::getDefaultKeyspace
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//
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// Can't call MediaWikiServices here, as we must not cause services
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// to be instantiated before extensions have loaded.
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global $wgCachePrefix;
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$keyspace = ( is_string( $wgCachePrefix ) && $wgCachePrefix !== '' )
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? $wgCachePrefix
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: WikiMap::getCurrentWikiDbDomain()->getId();
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return ObjectCacheFactory::makeLocalServerCache( $keyspace );
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}
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return $this->cache;
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}
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private function makeCacheKey( BagOStuff $cache, $component, ...$extra ) {
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// Allow reusing cached ExtensionRegistry metadata between wikis (T274648)
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return $cache->makeGlobalKey(
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"registration-$component",
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$this->getVaryHash(),
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...$extra
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);
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}
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/**
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* Get the cache varying hash
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*
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* @return string
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*/
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private function getVaryHash() {
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if ( $this->varyHash === null ) {
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// We vary the cache on the current queue (what will be or already was loaded)
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// plus various versions of stuff for VersionChecker
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$vary = [
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'registration' => self::CACHE_VERSION,
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'mediawiki' => MW_VERSION,
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'abilities' => $this->getAbilities(),
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'checkDev' => $this->checkDev,
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'queue' => $this->queued,
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];
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$this->varyHash = md5( json_encode( $vary ) );
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}
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return $this->varyHash;
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}
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/**
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* Invalidate the cache of the vary hash and the lazy options.
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*/
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private function invalidateProcessCache() {
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$this->varyHash = null;
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$this->lazyAttributes = [];
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}
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public function loadFromQueue() {
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if ( !$this->queued ) {
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return;
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}
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if ( $this->finished ) {
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throw new LogicException(
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"The following paths tried to load late: "
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. implode( ', ', array_keys( $this->queued ) )
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);
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}
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$cache = $this->getCache();
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// See if this queue is in APC
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$key = $this->makeCacheKey( $cache, 'main' );
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$data = $cache->get( $key );
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if ( !$data ) {
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$data = $this->readFromQueue( $this->queued );
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$this->saveToCache( $cache, $data );
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}
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$this->exportExtractedData( $data );
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}
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/**
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* Save data in the cache
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*
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* @param BagOStuff $cache
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* @param array $data
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*/
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protected function saveToCache( BagOStuff $cache, array $data ) {
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global $wgDevelopmentWarnings;
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if ( $data['warnings'] && $wgDevelopmentWarnings ) {
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// If warnings were shown, don't cache it
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return;
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}
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$lazy = [];
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// Cache lazy-loaded attributes separately
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foreach ( self::LAZY_LOADED_ATTRIBUTES as $attrib ) {
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if ( isset( $data['attributes'][$attrib] ) ) {
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$lazy[$attrib] = $data['attributes'][$attrib];
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unset( $data['attributes'][$attrib] );
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}
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}
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$mainKey = $this->makeCacheKey( $cache, 'main' );
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$cache->set( $mainKey, $data, self::CACHE_EXPIRY );
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foreach ( $lazy as $attrib => $value ) {
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$cache->set(
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$this->makeCacheKey( $cache, 'lazy-attrib', $attrib ),
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$value,
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self::CACHE_EXPIRY
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);
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}
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}
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/**
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* Get the current load queue. Not intended to be used
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* outside of the installer.
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*
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* @return int[] Map of extension.json files' modification timestamps keyed by absolute path
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*/
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public function getQueue() {
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return $this->queued;
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}
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/**
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* Clear the current load queue. Not intended to be used
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* outside of the installer.
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*/
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public function clearQueue() {
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$this->queued = [];
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$this->invalidateProcessCache();
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}
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/**
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* After this is called, no more extensions can be loaded
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*
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* @since 1.29
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*/
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public function finish() {
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$this->finished = true;
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}
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/**
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* Get the list of abilities and their values
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* @return bool[]
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*/
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private function getAbilities() {
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return [
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'shell' => !Shell::isDisabled(),
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];
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}
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/**
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* Queries information about the software environment and constructs an appropriate version checker
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*
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* @return VersionChecker
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*/
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private function buildVersionChecker() {
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// array to optionally specify more verbose error messages for
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// missing abilities
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$abilityErrors = [
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'shell' => ( new ShellDisabledError() )->getMessage(),
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];
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return new VersionChecker(
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MW_VERSION,
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PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION . '.' . PHP_RELEASE_VERSION,
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get_loaded_extensions(),
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$this->getAbilities(),
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$abilityErrors
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);
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}
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/**
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* Process a queue of extensions and return their extracted data
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*
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* @internal since 1.39. Extensions should use ExtensionProcessor instead.
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*
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* @param int[] $queue keys are filenames, values are ignored
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* @return array extracted info
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* @throws InvalidArgumentException
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* @throws ExtensionDependencyError
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*/
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public function readFromQueue( array $queue ) {
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$processor = new ExtensionProcessor();
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$versionChecker = $this->buildVersionChecker();
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$extDependencies = [];
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$warnings = false;
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foreach ( $queue as $path => $mtime ) {
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$json = file_get_contents( $path );
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if ( $json === false ) {
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throw new InvalidArgumentException( "Unable to read $path, does it exist?" );
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}
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$info = json_decode( $json, /* $assoc = */ true );
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if ( !is_array( $info ) ) {
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throw new InvalidArgumentException( "$path is not a valid JSON file." );
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}
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$version = $info['manifest_version'];
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if ( $version < self::OLDEST_MANIFEST_VERSION || $version > self::MANIFEST_VERSION ) {
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throw new InvalidArgumentException( "$path: unsupported manifest_version: {$version}" );
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}
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// get all requirements/dependencies for this extension
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$requires = $processor->getRequirements( $info, $this->checkDev );
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// validate the information needed and add the requirements
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if ( is_array( $requires ) && $requires && isset( $info['name'] ) ) {
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$extDependencies[$info['name']] = $requires;
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}
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// Compatible, read and extract info
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$processor->extractInfo( $path, $info, $version );
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}
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$data = $processor->getExtractedInfo( $this->loadTestClassesAndNamespaces );
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$data['warnings'] = $warnings;
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// check for incompatible extensions
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$incompatible = $versionChecker
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->setLoadedExtensionsAndSkins( $data['credits'] )
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->checkArray( $extDependencies );
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if ( $incompatible ) {
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throw new ExtensionDependencyError( $incompatible );
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}
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return $data;
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}
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protected function exportExtractedData( array $info ) {
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if ( $info['globals'] ) {
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// Create a copy of the keys to allow fast access via isset also for null values
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// Since php8.1 always a read-only copy is created when the whole object is passed on function calls
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// (like for array_key_exists). See T366547 - https://wiki.php.net/rfc/restrict_globals_usage
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$knownGlobals = array_fill_keys( array_keys( $GLOBALS ), true );
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foreach ( $info['globals'] as $key => $val ) {
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// If a merge strategy is set, read it and remove it from the value
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// so it doesn't accidentally end up getting set.
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if ( is_array( $val ) && isset( $val[self::MERGE_STRATEGY] ) ) {
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$mergeStrategy = $val[self::MERGE_STRATEGY];
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unset( $val[self::MERGE_STRATEGY] );
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} else {
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$mergeStrategy = 'array_merge';
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}
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if ( $mergeStrategy === 'provide_default' ) {
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if ( !isset( $knownGlobals[$key] ) ) {
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$GLOBALS[$key] = $val;
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$knownGlobals[$key] = true;
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}
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continue;
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}
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// Performance optimization: When the global doesn't exist (not even with null), just set it
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if ( !isset( $knownGlobals[$key] ) ) {
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$GLOBALS[$key] = $val;
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$knownGlobals[$key] = true;
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continue;
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} elseif ( !is_array( $val ) || !is_array( $GLOBALS[$key] ) ) {
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// When at least one of the global value and the default is not an array, the merge
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// strategy is ignored and the global value will simply override the default.
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continue;
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} elseif ( !$GLOBALS[$key] ) {
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// Performance optimization: When the target is an empty array, just set it
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$GLOBALS[$key] = $val;
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continue;
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}
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switch ( $mergeStrategy ) {
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case 'array_merge_recursive':
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$GLOBALS[$key] = array_merge_recursive( $GLOBALS[$key], $val );
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break;
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case 'array_replace_recursive':
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$GLOBALS[$key] = array_replace_recursive( $val, $GLOBALS[$key] );
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break;
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case 'array_plus_2d':
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$GLOBALS[$key] = wfArrayPlus2d( $GLOBALS[$key], $val );
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break;
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case 'array_plus':
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$GLOBALS[$key] += $val;
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break;
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case 'array_merge':
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$GLOBALS[$key] = array_merge( $val, $GLOBALS[$key] );
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break;
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default:
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throw new UnexpectedValueException( "Unknown merge strategy '$mergeStrategy'" );
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}
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}
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}
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if ( isset( $info['autoloaderNS'] ) ) {
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AutoLoader::registerNamespaces( $info['autoloaderNS'] );
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}
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if ( isset( $info['autoloaderClasses'] ) ) {
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AutoLoader::registerClasses( $info['autoloaderClasses'] );
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}
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foreach ( $info['defines'] as $name => $val ) {
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if ( !defined( $name ) ) {
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define( $name, $val );
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} elseif ( constant( $name ) !== $val ) {
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throw new UnexpectedValueException(
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"$name cannot be re-defined with $val it has already been set with " . constant( $name )
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);
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}
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}
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if ( isset( $info['autoloaderPaths'] ) ) {
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AutoLoader::loadFiles( $info['autoloaderPaths'] );
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}
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$this->loaded += $info['credits'];
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if ( $info['attributes'] ) {
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if ( !$this->attributes ) {
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$this->attributes = $info['attributes'];
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} else {
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$this->attributes = array_merge_recursive( $this->attributes, $info['attributes'] );
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}
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}
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// XXX: SettingsBuilder should really be a parameter to this method.
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$settings = $this->getSettingsBuilder();
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|
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foreach ( $info['callbacks'] as $name => $cb ) {
|
|
if ( !is_callable( $cb ) ) {
|
|
if ( is_array( $cb ) ) {
|
|
$cb = '[ ' . implode( ', ', $cb ) . ' ]';
|
|
}
|
|
throw new UnexpectedValueException( "callback '$cb' is not callable" );
|
|
}
|
|
$cb( $info['credits'][$name], $settings );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Whether a thing has been loaded
|
|
* @param string $name
|
|
* @param string $constraint The required version constraint for this dependency
|
|
* @throws LogicException if a specific constraint is asked for,
|
|
* but the extension isn't versioned
|
|
* @return bool
|
|
*/
|
|
public function isLoaded( $name, $constraint = '*' ) {
|
|
$isLoaded = isset( $this->loaded[$name] );
|
|
if ( $constraint === '*' || !$isLoaded ) {
|
|
return $isLoaded;
|
|
}
|
|
// if a specific constraint is requested, but no version is set, throw an exception
|
|
if ( !isset( $this->loaded[$name]['version'] ) ) {
|
|
$msg = "{$name} does not expose its version, but an extension or a skin"
|
|
. " requires: {$constraint}.";
|
|
throw new LogicException( $msg );
|
|
}
|
|
|
|
return Semver::satisfies( $this->loaded[$name]['version'], $constraint );
|
|
}
|
|
|
|
/**
|
|
* @param string $name
|
|
* @return array
|
|
*/
|
|
public function getAttribute( $name ) {
|
|
if ( isset( $this->testAttributes[$name] ) ) {
|
|
return $this->testAttributes[$name];
|
|
}
|
|
|
|
if ( in_array( $name, self::LAZY_LOADED_ATTRIBUTES, true ) ) {
|
|
return $this->getLazyLoadedAttribute( $name );
|
|
}
|
|
|
|
return $this->attributes[$name] ?? [];
|
|
}
|
|
|
|
/**
|
|
* Get an attribute value that isn't cached by reading each
|
|
* extension.json file again
|
|
* @param string $name
|
|
* @return array
|
|
*/
|
|
protected function getLazyLoadedAttribute( $name ) {
|
|
if ( isset( $this->testAttributes[$name] ) ) {
|
|
return $this->testAttributes[$name];
|
|
}
|
|
if ( isset( $this->lazyAttributes[$name] ) ) {
|
|
return $this->lazyAttributes[$name];
|
|
}
|
|
|
|
// See if it's in the cache
|
|
$cache = $this->getCache();
|
|
$key = $this->makeCacheKey( $cache, 'lazy-attrib', $name );
|
|
$data = $cache->get( $key );
|
|
if ( $data !== false ) {
|
|
$this->lazyAttributes[$name] = $data;
|
|
return $data;
|
|
}
|
|
|
|
$paths = [];
|
|
foreach ( $this->loaded as $info ) {
|
|
// mtime (array value) doesn't matter here since
|
|
// we're skipping cache, so use a dummy time
|
|
$paths[$info['path']] = 1;
|
|
}
|
|
|
|
$result = $this->readFromQueue( $paths );
|
|
$data = $result['attributes'][$name] ?? [];
|
|
$this->saveToCache( $cache, $result );
|
|
$this->lazyAttributes[$name] = $data;
|
|
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* Force override the value of an attribute during tests
|
|
*
|
|
* @param string $name Name of attribute to override
|
|
* @param array $value Value to set
|
|
* @return ScopedCallback to reset
|
|
* @since 1.33
|
|
*/
|
|
public function setAttributeForTest( $name, array $value ) {
|
|
// @codeCoverageIgnoreStart
|
|
if ( !defined( 'MW_PHPUNIT_TEST' ) ) {
|
|
throw new LogicException( __METHOD__ . ' can only be used in tests' );
|
|
}
|
|
// @codeCoverageIgnoreEnd
|
|
if ( isset( $this->testAttributes[$name] ) ) {
|
|
throw new InvalidArgumentException( "The attribute '$name' has already been overridden" );
|
|
}
|
|
$this->testAttributes[$name] = $value;
|
|
return new ScopedCallback( function () use ( $name ) {
|
|
unset( $this->testAttributes[$name] );
|
|
} );
|
|
}
|
|
|
|
/**
|
|
* Get credits information about all installed extensions and skins.
|
|
*
|
|
* @return array[] Keyed by component name.
|
|
*/
|
|
public function getAllThings() {
|
|
return $this->loaded;
|
|
}
|
|
|
|
/**
|
|
* Fully expand autoloader paths
|
|
*
|
|
* @param string $dir
|
|
* @param string[] $files
|
|
* @return array
|
|
*/
|
|
protected static function processAutoLoader( $dir, array $files ) {
|
|
// Make paths absolute, relative to the JSON file
|
|
foreach ( $files as &$file ) {
|
|
$file = "$dir/$file";
|
|
}
|
|
return $files;
|
|
}
|
|
|
|
/**
|
|
* @internal for use by Setup. Hopefully in the future, we find a better way.
|
|
* @param SettingsBuilder $settingsBuilder
|
|
*/
|
|
public function setSettingsBuilder( SettingsBuilder $settingsBuilder ) {
|
|
$this->settingsBuilder = $settingsBuilder;
|
|
}
|
|
|
|
private function getSettingsBuilder(): SettingsBuilder {
|
|
if ( $this->settingsBuilder === null ) {
|
|
$this->settingsBuilder = SettingsBuilder::getInstance();
|
|
}
|
|
return $this->settingsBuilder;
|
|
}
|
|
}
|