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<?php |
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/* HEADER */ // phpcs:ignore |
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/** |
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* This class handles management of the actual PHP autoloader. |
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*/ |
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class Autoloader { |
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/** |
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* Checks to see whether or not the autoloader should be initialized and then initializes it if so. |
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* |
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* @param Container|null $container The container we want to use for autoloader initialization. If none is given |
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* then a container will be created automatically. |
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*/ |
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public static function init( $container = null ) { |
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// The container holds and manages the lifecycle of our dependencies |
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// to make them easier to work with and increase flexibility. |
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if ( ! isset( $container ) ) { |
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require_once __DIR__ . '/class-container.php'; |
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$container = new Container(); |
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} |
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// phpcs:disable Generic.Commenting.DocComment.MissingShort |
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/** @var Plugin_Locator $plugin_locator */ |
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$plugin_locator = $container->get( Plugin_Locator::class ); |
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/** @var Plugins_Handler $plugins_handler */ |
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$plugins_handler = $container->get( Plugins_Handler::class ); |
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// The current plugin is the one that we are attempting to initialize here. |
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$current_plugin = $plugin_locator->find_current_plugin(); |
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// The cached plugins are all of those that were active or discovered by the autoloader during a previous request. |
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// Note that it's possible this list will include plugins that have since been deactivated, but after a request |
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// the cache should be updated and the deactivated plugins will be removed. |
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$cached_plugins = $plugins_handler->get_cached_plugins(); |
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// The active plugins are those that we were able to discover in on the site. This list will not include |
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// mu-plugins, those activated by code, or those who are hidden by filtering. |
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// By combining these lists we can preemptively load classes for plugins that are activated via another method. |
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// While this may result in us considering packages in deactivated plugins the request after they're removed, |
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// there shouldn't be any problems as a result and the eventual consistency is reliable enough. |
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$all_plugins = array_values( array_unique( array_merge( $plugins_handler->get_active_plugins(), $cached_plugins ) ) ); |
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/** @var Latest_Autoloader_Guard $guard */ |
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$guard = $container->get( Latest_Autoloader_Guard::class ); |
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if ( $guard->should_stop_init( $current_plugin, $all_plugins ) ) { |
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return; |
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} |
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/** @var Autoloader_Handler $autoloader_handler */ |
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$autoloader_handler = $container->get( Autoloader_Handler::class ); |
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// Initialize the autoloader using the handler now that we're ready. |
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$autoloader_handler->create_autoloader( $all_plugins ); |
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/** @var Hook_Manager $hook_manager */ |
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$hook_manager = $container->get( Hook_Manager::class ); |
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// When the active and cached plugin lists do not match we should |
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// update the cache. This will prevent plugins that have been |
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// deactivated from being considered in other requests. |
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$hook_manager->add_action( |
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'shutdown', |
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function () use ( $plugins_handler, $cached_plugins ) { |
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// Don't save a broken cache if an error happens during some plugin's initialization. |
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if ( ! did_action( 'plugins_loaded' ) ) { |
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// Ensure that the cache is emptied to prevent consecutive failures if the cache is to blame. |
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if ( ! empty( $cached_plugins ) ) { |
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$plugins_handler->cache_plugins( array() ); |
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} |
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return; |
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} |
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// Load the active plugins fresh since the list we pulled earlier might not contain |
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// plugins that were activated but did not reset the autoloader. This happens |
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// when a plugin is in the cache but not "active" when the autoloader loads. |
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// We also want to make sure that plugins which are deactivating are not |
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// considered "active" so that they will be removed from the cache now. |
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$active_plugins = $plugins_handler->get_active_plugins( false ); |
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// The paths should be sorted for easy comparisons with those loaded from the cache. |
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// Note we don't need to sort the cached entries because they're already sorted. |
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sort( $active_plugins ); |
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// We don't want to waste time saving a cache that hasn't changed. |
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if ( $cached_plugins === $active_plugins ) { |
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return; |
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} |
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$plugins_handler->cache_plugins( $active_plugins ); |
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} |
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); |
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// phpcs:enable Generic.Commenting.DocComment.MissingShort |
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} |
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/** |
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* Loads a class file if one could be found. |
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* |
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* @param string $class_name The name of the class to autoload. |
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* |
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* @return bool Indicates whether or not a class file was loaded. |
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*/ |
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public static function load_class( $class_name ) { |
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global $jetpack_autoloader_loader; |
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if ( ! isset( $jetpack_autoloader_loader ) ) { |
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return; |
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} |
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$file = $jetpack_autoloader_loader->find_class_file( $class_name ); |
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if ( ! isset( $file ) ) { |
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return false; |
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} |
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require $file; |
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return true; |
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} |
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/** |
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* Activates this autoloader and deactivates any other v2 autoloaders that may be present. |
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* |
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* @param Version_Loader $version_loader The version loader for our autoloader. |
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*/ |
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public static function activate( $version_loader ) { |
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// Set the global autoloader to indicate that we've activated this autoloader. |
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global $jetpack_autoloader_loader; |
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$jetpack_autoloader_loader = $version_loader; |
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// Remove any v2 autoloader that we've already registered. |
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$autoload_chain = spl_autoload_functions(); |
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foreach ( $autoload_chain as $autoloader ) { |
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// Jetpack autoloaders are always strings. |
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if ( ! is_string( $autoloader ) ) { |
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continue; |
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} |
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// We can identify a v2 autoloader using the namespace prefix without the unique suffix. |
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if ( 'Automattic\\Jetpack\\Autoloader\\jp' === substr( $autoloader, 0, 32 ) ) { |
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spl_autoload_unregister( $autoloader ); |
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continue; |
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} |
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} |
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// Ensure that the autoloader is first to avoid contention with others. |
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spl_autoload_register( self::class . '::load_class', true, true ); |
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// Now that we've activated the autoloader we should load the filemap. |
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$jetpack_autoloader_loader->load_filemap(); |
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} |
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} |
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Automattic /
jetpack
