File "class-autoloader.php"
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<?php
/* HEADER */ // phpcs:ignore
/**
* This class handles management of the actual PHP autoloader.
*/
class Autoloader {
/**
* Checks to see whether or not the autoloader should be initialized and then initializes it if so.
*
* @param Container|null $container The container we want to use for autoloader initialization. If none is given
* then a container will be created automatically.
*/
public static function init( $container = null ) {
// The container holds and manages the lifecycle of our dependencies
// to make them easier to work with and increase flexibility.
if ( ! isset( $container ) ) {
require_once __DIR__ . '/class-container.php';
$container = new Container();
}
// phpcs:disable Generic.Commenting.DocComment.MissingShort
/** @var Autoloader_Handler $autoloader_handler */
$autoloader_handler = $container->get( Autoloader_Handler::class );
// If the autoloader is already initializing it means that it has included us as the latest.
$was_included_by_autoloader = $autoloader_handler->is_initializing();
/** @var Plugin_Locator $plugin_locator */
$plugin_locator = $container->get( Plugin_Locator::class );
/** @var Plugins_Handler $plugins_handler */
$plugins_handler = $container->get( Plugins_Handler::class );
// The current plugin is the one that we are attempting to initialize here.
$current_plugin = $plugin_locator->find_current_plugin();
// The active plugins are those that we were able to discover on the site. This list will not
// include mu-plugins, those activated by code, or those who are hidden by filtering. We also
// want to take care to not consider the current plugin unknown if it was included by an
// autoloader. This avoids the case where a plugin will be marked "active" while deactivated
// due to it having the latest autoloader.
$active_plugins = $plugins_handler->get_active_plugins( true, ! $was_included_by_autoloader );
// The cached plugins are all of those that were active or discovered by the autoloader during a previous request.
// Note that it's possible this list will include plugins that have since been deactivated, but after a request
// the cache should be updated and the deactivated plugins will be removed.
$cached_plugins = $plugins_handler->get_cached_plugins();
// We combine the active list and cached list to preemptively load classes for plugins that are
// presently unknown but will be loaded during the request. While this may result in us considering packages in
// deactivated plugins there shouldn't be any problems as a result and the eventual consistency is sufficient.
$all_plugins = array_merge( $active_plugins, $cached_plugins );
// In particular we also include the current plugin to address the case where it is the latest autoloader
// but also unknown (and not cached). We don't want it in the active list because we don't know that it
// is active but we need it in the all plugins list so that it is considered by the autoloader.
$all_plugins[] = $current_plugin;
// We require uniqueness in the array to avoid processing the same plugin more than once.
$all_plugins = array_values( array_unique( $all_plugins ) );
/** @var Latest_Autoloader_Guard $guard */
$guard = $container->get( Latest_Autoloader_Guard::class );
if ( $guard->should_stop_init( $current_plugin, $all_plugins, $was_included_by_autoloader ) ) {
return;
}
// Initialize the autoloader using the handler now that we're ready.
$autoloader_handler->activate_autoloader( $all_plugins );
/** @var Hook_Manager $hook_manager */
$hook_manager = $container->get( Hook_Manager::class );
// When the active and cached plugin lists do not match we should
// update the cache. This will prevent plugins that have been
// deactivated from being considered in other requests.
$hook_manager->add_action(
'shutdown',
function () use ( $plugins_handler, $cached_plugins, $was_included_by_autoloader ) {
// Don't save a broken cache if an error happens during some plugin's initialization.
if ( ! did_action( 'plugins_loaded' ) ) {
// Ensure that the cache is emptied to prevent consecutive failures if the cache is to blame.
if ( ! empty( $cached_plugins ) ) {
$plugins_handler->cache_plugins( array() );
}
return;
}
// Load the active plugins fresh since the list we pulled earlier might not contain
// plugins that were activated but did not reset the autoloader. This happens
// when a plugin is in the cache but not "active" when the autoloader loads.
// We also want to make sure that plugins which are deactivating are not
// considered "active" so that they will be removed from the cache now.
$active_plugins = $plugins_handler->get_active_plugins( false, ! $was_included_by_autoloader );
// The paths should be sorted for easy comparisons with those loaded from the cache.
// Note we don't need to sort the cached entries because they're already sorted.
sort( $active_plugins );
// We don't want to waste time saving a cache that hasn't changed.
if ( $cached_plugins === $active_plugins ) {
return;
}
$plugins_handler->cache_plugins( $active_plugins );
}
);
// phpcs:enable Generic.Commenting.DocComment.MissingShort
}
}