WP_Automatic_Updater::run()

Source

public function run() {
	if ( $this->is_disabled() ) {
		return;
	}

	if ( ! is_main_network() || ! is_main_site() ) {
		return;
	}

	if ( ! WP_Upgrader::create_lock( 'auto_updater' ) ) {
		return;
	}

	$is_debug = WP_DEBUG && WP_DEBUG_LOG;

	if ( $is_debug ) {
		error_log( 'Automatic updates starting...' );
	}

	// Don't automatically run these things, as we'll handle it ourselves.
	remove_action( 'upgrader_process_complete', array( 'Language_Pack_Upgrader', 'async_upgrade' ), 20 );
	remove_action( 'upgrader_process_complete', 'wp_version_check' );
	remove_action( 'upgrader_process_complete', 'wp_update_plugins' );
	remove_action( 'upgrader_process_complete', 'wp_update_themes' );

	// Next, plugins.
	wp_update_plugins(); // Check for plugin updates.
	$plugin_updates = get_site_transient( 'update_plugins' );
	if ( $plugin_updates && ! empty( $plugin_updates->response ) ) {
		if ( $is_debug ) {
			error_log( '  Automatic plugin updates starting...' );
		}

		foreach ( $plugin_updates->response as $plugin ) {
			$this->update( 'plugin', $plugin );
		}

		// Force refresh of plugin update information.
		wp_clean_plugins_cache();

		if ( $is_debug ) {
			error_log( '  Automatic plugin updates complete.' );
		}
	}

	// Next, those themes we all love.
	wp_update_themes();  // Check for theme updates.
	$theme_updates = get_site_transient( 'update_themes' );
	if ( $theme_updates && ! empty( $theme_updates->response ) ) {
		if ( $is_debug ) {
			error_log( '  Automatic theme updates starting...' );
		}

		foreach ( $theme_updates->response as $theme ) {
			$this->update( 'theme', (object) $theme );
		}
		// Force refresh of theme update information.
		wp_clean_themes_cache();

		if ( $is_debug ) {
			error_log( '  Automatic theme updates complete.' );
		}
	}

	if ( $is_debug ) {
		error_log( 'Automatic updates complete.' );
	}

	// Next, process any core update.
	wp_version_check(); // Check for core updates.
	$core_update = find_core_auto_update();

	if ( $core_update ) {
		$this->update( 'core', $core_update );
	}

	/*
	 * Clean up, and check for any pending translations.
	 * (Core_Upgrader checks for core updates.)
	 */
	$theme_stats = array();
	if ( isset( $this->update_results['theme'] ) ) {
		foreach ( $this->update_results['theme'] as $upgrade ) {
			$theme_stats[ $upgrade->item->theme ] = ( true === $upgrade->result );
		}
	}
	wp_update_themes( $theme_stats ); // Check for theme updates.

	$plugin_stats = array();
	if ( isset( $this->update_results['plugin'] ) ) {
		foreach ( $this->update_results['plugin'] as $upgrade ) {
			$plugin_stats[ $upgrade->item->plugin ] = ( true === $upgrade->result );
		}
	}
	wp_update_plugins( $plugin_stats ); // Check for plugin updates.

	// Finally, process any new translations.
	$language_updates = wp_get_translation_updates();
	if ( $language_updates ) {
		foreach ( $language_updates as $update ) {
			$this->update( 'translation', $update );
		}

		// Clear existing caches.
		wp_clean_update_cache();

		wp_version_check();  // Check for core updates.
		wp_update_themes();  // Check for theme updates.
		wp_update_plugins(); // Check for plugin updates.
	}

	// Send debugging email to admin for all development installations.
	if ( ! empty( $this->update_results ) ) {
		$development_version = str_contains( wp_get_wp_version(), '-' );

		/**
		 * Filters whether to send a debugging email for each automatic background update.
		 *
		 * @since 3.7.0
		 *
		 * @param bool $development_version By default, emails are sent if the
		 *                                  install is a development version.
		 *                                  Return false to avoid the email.
		 */
		if ( apply_filters( 'automatic_updates_send_debug_email', $development_version ) ) {
			$this->send_debug_email();
		}

		if ( ! empty( $this->update_results['core'] ) ) {
			$this->after_core_update( $this->update_results['core'][0] );
		} elseif ( ! empty( $this->update_results['plugin'] ) || ! empty( $this->update_results['theme'] ) ) {
			$this->after_plugin_theme_update( $this->update_results );
		}

		/**
		 * Fires after all automatic updates have run.
		 *
		 * @since 3.8.0
		 *
		 * @param array $update_results The results of all attempted updates.
		 */
		do_action( 'automatic_updates_complete', $this->update_results );
	}

	WP_Upgrader::release_lock( 'auto_updater' );
}

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