wp-admin/includes/class-wp-automatic-updater.php:362Updates an item, if appropriate.
$typestring$itemobjectnull|WP_ErrorOne hook fires while WP_Automatic_Updater::update() runs, in this order:
Fires immediately prior to an auto-update.
public function update( $type, $item ) { $skin = new Automatic_Upgrader_Skin(); switch ( $type ) { case 'core': // The Core upgrader doesn't use the Upgrader's skin during the actual main part of the upgrade, instead, firing a filter. add_filter( 'update_feedback', array( $skin, 'feedback' ) ); $upgrader = new Core_Upgrader( $skin ); $context = ABSPATH; break; case 'plugin': $upgrader = new Plugin_Upgrader( $skin ); $context = WP_PLUGIN_DIR; // We don't support custom Plugin directories, or updates for WPMU_PLUGIN_DIR. break; case 'theme': $upgrader = new Theme_Upgrader( $skin ); $context = get_theme_root( $item->theme ); break; case 'translation': $upgrader = new Language_Pack_Upgrader( $skin ); $context = WP_CONTENT_DIR; // WP_LANG_DIR; break; } // Determine whether we can and should perform this update. if ( ! $this->should_update( $type, $item, $context ) ) { return false; } /** * Fires immediately prior to an auto-update. * * @since 4.4.0 * * @param string $type The type of update being checked: 'core', 'theme', 'plugin', or 'translation'. * @param object $item The update offer. * @param string $context The filesystem context (a path) against which filesystem access and status * should be checked. */ do_action( 'pre_auto_update', $type, $item, $context ); $upgrader_item = $item; switch ( $type ) { case 'core': /* translators: %s: WordPress version. */ $skin->feedback( __( 'Updating to WordPress %s' ), $item->version ); /* translators: %s: WordPress version. */ $item_name = sprintf( __( 'WordPress %s' ), $item->version ); break; case 'theme': $upgrader_item = $item->theme; $theme = wp_get_theme( $upgrader_item ); $item_name = $theme->Get( 'Name' ); // Add the current version so that it can be reported in the notification email. $item->current_version = $theme->get( 'Version' ); if ( empty( $item->current_version ) ) { $item->current_version = false; } /* translators: %s: Theme name. */ $skin->feedback( __( 'Updating theme: %s' ), $item_name ); break; case 'plugin': $upgrader_item = $item->plugin; $plugin_data = get_plugin_data( $context . '/' . $upgrader_item ); $item_name = $plugin_data['Name']; // Add the current version so that it can be reported in the notification email. $item->current_version = $plugin_data['Version']; if ( empty( $item->current_version ) ) { $item->current_version = false; } /* translators: %s: Plugin name. */ $skin->feedback( __( 'Updating plugin: %s' ), $item_name ); break; case 'translation': $language_item_name = $upgrader->get_name_for_update( $item ); /* translators: %s: Project name (plugin, theme, or WordPress). */ $item_name = sprintf( __( 'Translations for %s' ), $language_item_name ); /* translators: 1: Project name (plugin, theme, or WordPress), 2: Language. */ $skin->feedback( sprintf( __( 'Updating translations for %1$s (%2$s)…' ), $language_item_name, $item->language ) ); break;Introduced in 3.7.0. Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-admin/includes/class-wp-automatic-updater.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.