pre_auto_update
Action Hook: Fires immediately prior to an auto-update.
Source: wp-admin/includes/class-wp-automatic-updater.php:399
WP_Automatic_Updater::run()
Method: Kicks off the background update process, looping through all pending updates.
Source: wp-admin/includes/class-wp-automatic-updater.php:500
automatic_updates_send_debug_email
Filter Hook: Filters whether to send a debugging email for each automatic background update.
Source: wp-admin/includes/class-wp-automatic-updater.php:595
automatic_updates_complete
Action Hook: Fires after all automatic updates have run.
Source: wp-admin/includes/class-wp-automatic-updater.php:612
WP_Automatic_Updater::after_core_update()
Method: If we tried to perform a core update, check if we should send an email, and if we need to avoid processing future updates.
Source: wp-admin/includes/class-wp-automatic-updater.php:626
WP_Automatic_Updater::send_email()
Method: Sends an email upon the completion or failure of a background core update.
Source: wp-admin/includes/class-wp-automatic-updater.php:725