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1a28ec87e1
Prior to about 2013, many class methods lacked even access modifiers which made the `@access` notations that much more useful. Now that we've gotten to a point where the codebase is more mature from a maintenance perspective and we can finally remove these notations. Notable exceptions to this change include standalone functions notated as private as well as some classes still considered to represent "private" APIs. See #41452. Built from https://develop.svn.wordpress.org/trunk@41161 git-svn-id: http://core.svn.wordpress.org/trunk@41001 1a063a9b-81f0-0310-95a4-ce76da25c4cd
362 lines
13 KiB
PHP
362 lines
13 KiB
PHP
<?php
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/**
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* Upgrade API: Core_Upgrader class
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*
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* @package WordPress
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* @subpackage Upgrader
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* @since 4.6.0
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*/
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/**
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* Core class used for updating core.
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*
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* It allows for WordPress to upgrade itself in combination with
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* the wp-admin/includes/update-core.php file.
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*
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* @since 2.8.0
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* @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader.php.
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*
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* @see WP_Upgrader
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*/
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class Core_Upgrader extends WP_Upgrader {
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/**
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* Initialize the upgrade strings.
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*
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* @since 2.8.0
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*/
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public function upgrade_strings() {
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$this->strings['up_to_date'] = __('WordPress is at the latest version.');
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$this->strings['locked'] = __('Another update is currently in progress.');
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$this->strings['no_package'] = __('Update package not available.');
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$this->strings['downloading_package'] = __('Downloading update from <span class="code">%s</span>…');
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$this->strings['unpack_package'] = __('Unpacking the update…');
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$this->strings['copy_failed'] = __('Could not copy files.');
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$this->strings['copy_failed_space'] = __('Could not copy files. You may have run out of disk space.' );
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$this->strings['start_rollback'] = __( 'Attempting to roll back to previous version.' );
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$this->strings['rollback_was_required'] = __( 'Due to an error during updating, WordPress has rolled back to your previous version.' );
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}
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/**
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* Upgrade WordPress core.
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*
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* @since 2.8.0
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*
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* @global WP_Filesystem_Base $wp_filesystem Subclass
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* @global callable $_wp_filesystem_direct_method
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*
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* @param object $current Response object for whether WordPress is current.
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* @param array $args {
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* Optional. Arguments for upgrading WordPress core. Default empty array.
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*
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* @type bool $pre_check_md5 Whether to check the file checksums before
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* attempting the upgrade. Default true.
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* @type bool $attempt_rollback Whether to attempt to rollback the chances if
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* there is a problem. Default false.
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* @type bool $do_rollback Whether to perform this "upgrade" as a rollback.
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* Default false.
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* }
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* @return null|false|WP_Error False or WP_Error on failure, null on success.
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*/
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public function upgrade( $current, $args = array() ) {
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global $wp_filesystem;
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include( ABSPATH . WPINC . '/version.php' ); // $wp_version;
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$start_time = time();
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$defaults = array(
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'pre_check_md5' => true,
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'attempt_rollback' => false,
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'do_rollback' => false,
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'allow_relaxed_file_ownership' => false,
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);
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$parsed_args = wp_parse_args( $args, $defaults );
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$this->init();
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$this->upgrade_strings();
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// Is an update available?
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if ( !isset( $current->response ) || $current->response == 'latest' )
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return new WP_Error('up_to_date', $this->strings['up_to_date']);
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$res = $this->fs_connect( array( ABSPATH, WP_CONTENT_DIR ), $parsed_args['allow_relaxed_file_ownership'] );
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if ( ! $res || is_wp_error( $res ) ) {
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return $res;
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}
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$wp_dir = trailingslashit($wp_filesystem->abspath());
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$partial = true;
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if ( $parsed_args['do_rollback'] )
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$partial = false;
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elseif ( $parsed_args['pre_check_md5'] && ! $this->check_files() )
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$partial = false;
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/*
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* If partial update is returned from the API, use that, unless we're doing
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* a reinstall. If we cross the new_bundled version number, then use
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* the new_bundled zip. Don't though if the constant is set to skip bundled items.
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* If the API returns a no_content zip, go with it. Finally, default to the full zip.
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*/
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if ( $parsed_args['do_rollback'] && $current->packages->rollback )
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$to_download = 'rollback';
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elseif ( $current->packages->partial && 'reinstall' != $current->response && $wp_version == $current->partial_version && $partial )
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$to_download = 'partial';
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elseif ( $current->packages->new_bundled && version_compare( $wp_version, $current->new_bundled, '<' )
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&& ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) )
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$to_download = 'new_bundled';
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elseif ( $current->packages->no_content )
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$to_download = 'no_content';
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else
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$to_download = 'full';
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// Lock to prevent multiple Core Updates occurring
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$lock = WP_Upgrader::create_lock( 'core_updater', 15 * MINUTE_IN_SECONDS );
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if ( ! $lock ) {
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return new WP_Error( 'locked', $this->strings['locked'] );
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}
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$download = $this->download_package( $current->packages->$to_download );
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if ( is_wp_error( $download ) ) {
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WP_Upgrader::release_lock( 'core_updater' );
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return $download;
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}
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$working_dir = $this->unpack_package( $download );
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if ( is_wp_error( $working_dir ) ) {
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WP_Upgrader::release_lock( 'core_updater' );
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return $working_dir;
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}
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// Copy update-core.php from the new version into place.
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if ( !$wp_filesystem->copy($working_dir . '/wordpress/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true) ) {
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$wp_filesystem->delete($working_dir, true);
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WP_Upgrader::release_lock( 'core_updater' );
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return new WP_Error( 'copy_failed_for_update_core_file', __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' ), 'wp-admin/includes/update-core.php' );
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}
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$wp_filesystem->chmod($wp_dir . 'wp-admin/includes/update-core.php', FS_CHMOD_FILE);
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require_once( ABSPATH . 'wp-admin/includes/update-core.php' );
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if ( ! function_exists( 'update_core' ) ) {
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WP_Upgrader::release_lock( 'core_updater' );
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return new WP_Error( 'copy_failed_space', $this->strings['copy_failed_space'] );
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}
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$result = update_core( $working_dir, $wp_dir );
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// In the event of an issue, we may be able to roll back.
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if ( $parsed_args['attempt_rollback'] && $current->packages->rollback && ! $parsed_args['do_rollback'] ) {
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$try_rollback = false;
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if ( is_wp_error( $result ) ) {
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$error_code = $result->get_error_code();
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/*
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* Not all errors are equal. These codes are critical: copy_failed__copy_dir,
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* mkdir_failed__copy_dir, copy_failed__copy_dir_retry, and disk_full.
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* do_rollback allows for update_core() to trigger a rollback if needed.
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*/
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if ( false !== strpos( $error_code, 'do_rollback' ) )
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$try_rollback = true;
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elseif ( false !== strpos( $error_code, '__copy_dir' ) )
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$try_rollback = true;
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elseif ( 'disk_full' === $error_code )
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$try_rollback = true;
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}
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if ( $try_rollback ) {
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/** This filter is documented in wp-admin/includes/update-core.php */
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apply_filters( 'update_feedback', $result );
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/** This filter is documented in wp-admin/includes/update-core.php */
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apply_filters( 'update_feedback', $this->strings['start_rollback'] );
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$rollback_result = $this->upgrade( $current, array_merge( $parsed_args, array( 'do_rollback' => true ) ) );
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$original_result = $result;
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$result = new WP_Error( 'rollback_was_required', $this->strings['rollback_was_required'], (object) array( 'update' => $original_result, 'rollback' => $rollback_result ) );
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}
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}
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/** This action is documented in wp-admin/includes/class-wp-upgrader.php */
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do_action( 'upgrader_process_complete', $this, array( 'action' => 'update', 'type' => 'core' ) );
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// Clear the current updates
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delete_site_transient( 'update_core' );
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if ( ! $parsed_args['do_rollback'] ) {
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$stats = array(
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'update_type' => $current->response,
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'success' => true,
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'fs_method' => $wp_filesystem->method,
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'fs_method_forced' => defined( 'FS_METHOD' ) || has_filter( 'filesystem_method' ),
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'fs_method_direct' => !empty( $GLOBALS['_wp_filesystem_direct_method'] ) ? $GLOBALS['_wp_filesystem_direct_method'] : '',
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'time_taken' => time() - $start_time,
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'reported' => $wp_version,
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'attempted' => $current->version,
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);
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if ( is_wp_error( $result ) ) {
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$stats['success'] = false;
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// Did a rollback occur?
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if ( ! empty( $try_rollback ) ) {
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$stats['error_code'] = $original_result->get_error_code();
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$stats['error_data'] = $original_result->get_error_data();
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// Was the rollback successful? If not, collect its error too.
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$stats['rollback'] = ! is_wp_error( $rollback_result );
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if ( is_wp_error( $rollback_result ) ) {
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$stats['rollback_code'] = $rollback_result->get_error_code();
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$stats['rollback_data'] = $rollback_result->get_error_data();
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}
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} else {
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$stats['error_code'] = $result->get_error_code();
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$stats['error_data'] = $result->get_error_data();
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}
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}
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wp_version_check( $stats );
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}
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WP_Upgrader::release_lock( 'core_updater' );
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return $result;
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}
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/**
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* Determines if this WordPress Core version should update to an offered version or not.
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*
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* @since 3.7.0
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*
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* @static
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*
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* @param string $offered_ver The offered version, of the format x.y.z.
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* @return bool True if we should update to the offered version, otherwise false.
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*/
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public static function should_update_to_version( $offered_ver ) {
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include( ABSPATH . WPINC . '/version.php' ); // $wp_version; // x.y.z
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$current_branch = implode( '.', array_slice( preg_split( '/[.-]/', $wp_version ), 0, 2 ) ); // x.y
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$new_branch = implode( '.', array_slice( preg_split( '/[.-]/', $offered_ver ), 0, 2 ) ); // x.y
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$current_is_development_version = (bool) strpos( $wp_version, '-' );
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// Defaults:
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$upgrade_dev = true;
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$upgrade_minor = true;
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$upgrade_major = false;
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// WP_AUTO_UPDATE_CORE = true (all), 'minor', false.
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if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) {
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if ( false === WP_AUTO_UPDATE_CORE ) {
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// Defaults to turned off, unless a filter allows it
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$upgrade_dev = $upgrade_minor = $upgrade_major = false;
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} elseif ( true === WP_AUTO_UPDATE_CORE ) {
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// ALL updates for core
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$upgrade_dev = $upgrade_minor = $upgrade_major = true;
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} elseif ( 'minor' === WP_AUTO_UPDATE_CORE ) {
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// Only minor updates for core
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$upgrade_dev = $upgrade_major = false;
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$upgrade_minor = true;
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}
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}
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// 1: If we're already on that version, not much point in updating?
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if ( $offered_ver == $wp_version )
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return false;
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// 2: If we're running a newer version, that's a nope
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if ( version_compare( $wp_version, $offered_ver, '>' ) )
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return false;
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$failure_data = get_site_option( 'auto_core_update_failed' );
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if ( $failure_data ) {
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// If this was a critical update failure, cannot update.
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if ( ! empty( $failure_data['critical'] ) )
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return false;
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// Don't claim we can update on update-core.php if we have a non-critical failure logged.
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if ( $wp_version == $failure_data['current'] && false !== strpos( $offered_ver, '.1.next.minor' ) )
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return false;
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// Cannot update if we're retrying the same A to B update that caused a non-critical failure.
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// Some non-critical failures do allow retries, like download_failed.
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// 3.7.1 => 3.7.2 resulted in files_not_writable, if we are still on 3.7.1 and still trying to update to 3.7.2.
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if ( empty( $failure_data['retry'] ) && $wp_version == $failure_data['current'] && $offered_ver == $failure_data['attempted'] )
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return false;
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}
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// 3: 3.7-alpha-25000 -> 3.7-alpha-25678 -> 3.7-beta1 -> 3.7-beta2
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if ( $current_is_development_version ) {
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/**
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* Filters whether to enable automatic core updates for development versions.
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*
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* @since 3.7.0
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*
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* @param bool $upgrade_dev Whether to enable automatic updates for
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* development versions.
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*/
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if ( ! apply_filters( 'allow_dev_auto_core_updates', $upgrade_dev ) )
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return false;
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// Else fall through to minor + major branches below.
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}
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// 4: Minor In-branch updates (3.7.0 -> 3.7.1 -> 3.7.2 -> 3.7.4)
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if ( $current_branch == $new_branch ) {
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/**
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* Filters whether to enable minor automatic core updates.
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*
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* @since 3.7.0
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*
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* @param bool $upgrade_minor Whether to enable minor automatic core updates.
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*/
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return apply_filters( 'allow_minor_auto_core_updates', $upgrade_minor );
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}
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// 5: Major version updates (3.7.0 -> 3.8.0 -> 3.9.1)
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if ( version_compare( $new_branch, $current_branch, '>' ) ) {
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/**
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* Filters whether to enable major automatic core updates.
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*
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* @since 3.7.0
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*
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* @param bool $upgrade_major Whether to enable major automatic core updates.
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*/
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return apply_filters( 'allow_major_auto_core_updates', $upgrade_major );
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}
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// If we're not sure, we don't want it
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return false;
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}
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/**
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* Compare the disk file checksums against the expected checksums.
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*
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* @since 3.7.0
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*
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* @global string $wp_version
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* @global string $wp_local_package
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*
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* @return bool True if the checksums match, otherwise false.
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*/
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public function check_files() {
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global $wp_version, $wp_local_package;
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$checksums = get_core_checksums( $wp_version, isset( $wp_local_package ) ? $wp_local_package : 'en_US' );
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if ( ! is_array( $checksums ) )
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return false;
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foreach ( $checksums as $file => $checksum ) {
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// Skip files which get updated
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if ( 'wp-content' == substr( $file, 0, 10 ) )
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continue;
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if ( ! file_exists( ABSPATH . $file ) || md5_file( ABSPATH . $file ) !== $checksum )
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return false;
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}
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return true;
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}
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}
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