diff --git a/wp-admin/includes/class-core-upgrader.php b/wp-admin/includes/class-core-upgrader.php
new file mode 100644
index 0000000000..21fa2c7328
--- /dev/null
+++ b/wp-admin/includes/class-core-upgrader.php
@@ -0,0 +1,368 @@
+strings['up_to_date'] = __('WordPress is at the latest version.');
+ $this->strings['locked'] = __('Another update is currently in progress.');
+ $this->strings['no_package'] = __('Update package not available.');
+ $this->strings['downloading_package'] = __('Downloading update from %s…');
+ $this->strings['unpack_package'] = __('Unpacking the update…');
+ $this->strings['copy_failed'] = __('Could not copy files.');
+ $this->strings['copy_failed_space'] = __('Could not copy files. You may have run out of disk space.' );
+ $this->strings['start_rollback'] = __( 'Attempting to roll back to previous version.' );
+ $this->strings['rollback_was_required'] = __( 'Due to an error during updating, WordPress has rolled back to your previous version.' );
+ }
+
+ /**
+ * Upgrade WordPress core.
+ *
+ * @since 2.8.0
+ * @access public
+ *
+ * @global WP_Filesystem_Base $wp_filesystem Subclass
+ * @global callable $_wp_filesystem_direct_method
+ *
+ * @param object $current Response object for whether WordPress is current.
+ * @param array $args {
+ * Optional. Arguments for upgrading WordPress core. Default empty array.
+ *
+ * @type bool $pre_check_md5 Whether to check the file checksums before
+ * attempting the upgrade. Default true.
+ * @type bool $attempt_rollback Whether to attempt to rollback the chances if
+ * there is a problem. Default false.
+ * @type bool $do_rollback Whether to perform this "upgrade" as a rollback.
+ * Default false.
+ * }
+ * @return null|false|WP_Error False or WP_Error on failure, null on success.
+ */
+ public function upgrade( $current, $args = array() ) {
+ global $wp_filesystem;
+
+ include( ABSPATH . WPINC . '/version.php' ); // $wp_version;
+
+ $start_time = time();
+
+ $defaults = array(
+ 'pre_check_md5' => true,
+ 'attempt_rollback' => false,
+ 'do_rollback' => false,
+ 'allow_relaxed_file_ownership' => false,
+ );
+ $parsed_args = wp_parse_args( $args, $defaults );
+
+ $this->init();
+ $this->upgrade_strings();
+
+ // Is an update available?
+ if ( !isset( $current->response ) || $current->response == 'latest' )
+ return new WP_Error('up_to_date', $this->strings['up_to_date']);
+
+ $res = $this->fs_connect( array( ABSPATH, WP_CONTENT_DIR ), $parsed_args['allow_relaxed_file_ownership'] );
+ if ( ! $res || is_wp_error( $res ) ) {
+ return $res;
+ }
+
+ $wp_dir = trailingslashit($wp_filesystem->abspath());
+
+ $partial = true;
+ if ( $parsed_args['do_rollback'] )
+ $partial = false;
+ elseif ( $parsed_args['pre_check_md5'] && ! $this->check_files() )
+ $partial = false;
+
+ /*
+ * If partial update is returned from the API, use that, unless we're doing
+ * a reinstall. If we cross the new_bundled version number, then use
+ * the new_bundled zip. Don't though if the constant is set to skip bundled items.
+ * If the API returns a no_content zip, go with it. Finally, default to the full zip.
+ */
+ if ( $parsed_args['do_rollback'] && $current->packages->rollback )
+ $to_download = 'rollback';
+ elseif ( $current->packages->partial && 'reinstall' != $current->response && $wp_version == $current->partial_version && $partial )
+ $to_download = 'partial';
+ elseif ( $current->packages->new_bundled && version_compare( $wp_version, $current->new_bundled, '<' )
+ && ( ! defined( 'CORE_UPGRADE_SKIP_NEW_BUNDLED' ) || ! CORE_UPGRADE_SKIP_NEW_BUNDLED ) )
+ $to_download = 'new_bundled';
+ elseif ( $current->packages->no_content )
+ $to_download = 'no_content';
+ else
+ $to_download = 'full';
+
+ // Lock to prevent multiple Core Updates occuring
+ $lock = WP_Upgrader::create_lock( 'core_updater', 15 * MINUTE_IN_SECONDS );
+ if ( ! $lock ) {
+ return new WP_Error( 'locked', $this->strings['locked'] );
+ }
+
+ $download = $this->download_package( $current->packages->$to_download );
+ if ( is_wp_error( $download ) ) {
+ WP_Upgrader::release_lock( 'core_updater' );
+ return $download;
+ }
+
+ $working_dir = $this->unpack_package( $download );
+ if ( is_wp_error( $working_dir ) ) {
+ WP_Upgrader::release_lock( 'core_updater' );
+ return $working_dir;
+ }
+
+ // Copy update-core.php from the new version into place.
+ if ( !$wp_filesystem->copy($working_dir . '/wordpress/wp-admin/includes/update-core.php', $wp_dir . 'wp-admin/includes/update-core.php', true) ) {
+ $wp_filesystem->delete($working_dir, true);
+ WP_Upgrader::release_lock( 'core_updater' );
+ 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' );
+ }
+ $wp_filesystem->chmod($wp_dir . 'wp-admin/includes/update-core.php', FS_CHMOD_FILE);
+
+ require_once( ABSPATH . 'wp-admin/includes/update-core.php' );
+
+ if ( ! function_exists( 'update_core' ) ) {
+ WP_Upgrader::release_lock( 'core_updater' );
+ return new WP_Error( 'copy_failed_space', $this->strings['copy_failed_space'] );
+ }
+
+ $result = update_core( $working_dir, $wp_dir );
+
+ // In the event of an issue, we may be able to roll back.
+ if ( $parsed_args['attempt_rollback'] && $current->packages->rollback && ! $parsed_args['do_rollback'] ) {
+ $try_rollback = false;
+ if ( is_wp_error( $result ) ) {
+ $error_code = $result->get_error_code();
+ /*
+ * Not all errors are equal. These codes are critical: copy_failed__copy_dir,
+ * mkdir_failed__copy_dir, copy_failed__copy_dir_retry, and disk_full.
+ * do_rollback allows for update_core() to trigger a rollback if needed.
+ */
+ if ( false !== strpos( $error_code, 'do_rollback' ) )
+ $try_rollback = true;
+ elseif ( false !== strpos( $error_code, '__copy_dir' ) )
+ $try_rollback = true;
+ elseif ( 'disk_full' === $error_code )
+ $try_rollback = true;
+ }
+
+ if ( $try_rollback ) {
+ /** This filter is documented in wp-admin/includes/update-core.php */
+ apply_filters( 'update_feedback', $result );
+
+ /** This filter is documented in wp-admin/includes/update-core.php */
+ apply_filters( 'update_feedback', $this->strings['start_rollback'] );
+
+ $rollback_result = $this->upgrade( $current, array_merge( $parsed_args, array( 'do_rollback' => true ) ) );
+
+ $original_result = $result;
+ $result = new WP_Error( 'rollback_was_required', $this->strings['rollback_was_required'], (object) array( 'update' => $original_result, 'rollback' => $rollback_result ) );
+ }
+ }
+
+ /** This action is documented in wp-admin/includes/class-wp-upgrader.php */
+ do_action( 'upgrader_process_complete', $this, array( 'action' => 'update', 'type' => 'core' ) );
+
+ // Clear the current updates
+ delete_site_transient( 'update_core' );
+
+ if ( ! $parsed_args['do_rollback'] ) {
+ $stats = array(
+ 'update_type' => $current->response,
+ 'success' => true,
+ 'fs_method' => $wp_filesystem->method,
+ 'fs_method_forced' => defined( 'FS_METHOD' ) || has_filter( 'filesystem_method' ),
+ 'fs_method_direct' => !empty( $GLOBALS['_wp_filesystem_direct_method'] ) ? $GLOBALS['_wp_filesystem_direct_method'] : '',
+ 'time_taken' => time() - $start_time,
+ 'reported' => $wp_version,
+ 'attempted' => $current->version,
+ );
+
+ if ( is_wp_error( $result ) ) {
+ $stats['success'] = false;
+ // Did a rollback occur?
+ if ( ! empty( $try_rollback ) ) {
+ $stats['error_code'] = $original_result->get_error_code();
+ $stats['error_data'] = $original_result->get_error_data();
+ // Was the rollback successful? If not, collect its error too.
+ $stats['rollback'] = ! is_wp_error( $rollback_result );
+ if ( is_wp_error( $rollback_result ) ) {
+ $stats['rollback_code'] = $rollback_result->get_error_code();
+ $stats['rollback_data'] = $rollback_result->get_error_data();
+ }
+ } else {
+ $stats['error_code'] = $result->get_error_code();
+ $stats['error_data'] = $result->get_error_data();
+ }
+ }
+
+ wp_version_check( $stats );
+ }
+
+ WP_Upgrader::release_lock( 'core_updater' );
+
+ return $result;
+ }
+
+ /**
+ * Determines if this WordPress Core version should update to an offered version or not.
+ *
+ * @since 3.7.0
+ * @access public
+ *
+ * @static
+ *
+ * @param string $offered_ver The offered version, of the format x.y.z.
+ * @return bool True if we should update to the offered version, otherwise false.
+ */
+ public static function should_update_to_version( $offered_ver ) {
+ include( ABSPATH . WPINC . '/version.php' ); // $wp_version; // x.y.z
+
+ $current_branch = implode( '.', array_slice( preg_split( '/[.-]/', $wp_version ), 0, 2 ) ); // x.y
+ $new_branch = implode( '.', array_slice( preg_split( '/[.-]/', $offered_ver ), 0, 2 ) ); // x.y
+ $current_is_development_version = (bool) strpos( $wp_version, '-' );
+
+ // Defaults:
+ $upgrade_dev = true;
+ $upgrade_minor = true;
+ $upgrade_major = false;
+
+ // WP_AUTO_UPDATE_CORE = true (all), 'minor', false.
+ if ( defined( 'WP_AUTO_UPDATE_CORE' ) ) {
+ if ( false === WP_AUTO_UPDATE_CORE ) {
+ // Defaults to turned off, unless a filter allows it
+ $upgrade_dev = $upgrade_minor = $upgrade_major = false;
+ } elseif ( true === WP_AUTO_UPDATE_CORE ) {
+ // ALL updates for core
+ $upgrade_dev = $upgrade_minor = $upgrade_major = true;
+ } elseif ( 'minor' === WP_AUTO_UPDATE_CORE ) {
+ // Only minor updates for core
+ $upgrade_dev = $upgrade_major = false;
+ $upgrade_minor = true;
+ }
+ }
+
+ // 1: If we're already on that version, not much point in updating?
+ if ( $offered_ver == $wp_version )
+ return false;
+
+ // 2: If we're running a newer version, that's a nope
+ if ( version_compare( $wp_version, $offered_ver, '>' ) )
+ return false;
+
+ $failure_data = get_site_option( 'auto_core_update_failed' );
+ if ( $failure_data ) {
+ // If this was a critical update failure, cannot update.
+ if ( ! empty( $failure_data['critical'] ) )
+ return false;
+
+ // Don't claim we can update on update-core.php if we have a non-critical failure logged.
+ if ( $wp_version == $failure_data['current'] && false !== strpos( $offered_ver, '.1.next.minor' ) )
+ return false;
+
+ // Cannot update if we're retrying the same A to B update that caused a non-critical failure.
+ // Some non-critical failures do allow retries, like download_failed.
+ // 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.
+ if ( empty( $failure_data['retry'] ) && $wp_version == $failure_data['current'] && $offered_ver == $failure_data['attempted'] )
+ return false;
+ }
+
+ // 3: 3.7-alpha-25000 -> 3.7-alpha-25678 -> 3.7-beta1 -> 3.7-beta2
+ if ( $current_is_development_version ) {
+
+ /**
+ * Filter whether to enable automatic core updates for development versions.
+ *
+ * @since 3.7.0
+ *
+ * @param bool $upgrade_dev Whether to enable automatic updates for
+ * development versions.
+ */
+ if ( ! apply_filters( 'allow_dev_auto_core_updates', $upgrade_dev ) )
+ return false;
+ // Else fall through to minor + major branches below.
+ }
+
+ // 4: Minor In-branch updates (3.7.0 -> 3.7.1 -> 3.7.2 -> 3.7.4)
+ if ( $current_branch == $new_branch ) {
+
+ /**
+ * Filter whether to enable minor automatic core updates.
+ *
+ * @since 3.7.0
+ *
+ * @param bool $upgrade_minor Whether to enable minor automatic core updates.
+ */
+ return apply_filters( 'allow_minor_auto_core_updates', $upgrade_minor );
+ }
+
+ // 5: Major version updates (3.7.0 -> 3.8.0 -> 3.9.1)
+ if ( version_compare( $new_branch, $current_branch, '>' ) ) {
+
+ /**
+ * Filter whether to enable major automatic core updates.
+ *
+ * @since 3.7.0
+ *
+ * @param bool $upgrade_major Whether to enable major automatic core updates.
+ */
+ return apply_filters( 'allow_major_auto_core_updates', $upgrade_major );
+ }
+
+ // If we're not sure, we don't want it
+ return false;
+ }
+
+ /**
+ * Compare the disk file checksums against the expected checksums.
+ *
+ * @since 3.7.0
+ * @access public
+ *
+ * @global string $wp_version
+ * @global string $wp_local_package
+ *
+ * @return bool True if the checksums match, otherwise false.
+ */
+ public function check_files() {
+ global $wp_version, $wp_local_package;
+
+ $checksums = get_core_checksums( $wp_version, isset( $wp_local_package ) ? $wp_local_package : 'en_US' );
+
+ if ( ! is_array( $checksums ) )
+ return false;
+
+ foreach ( $checksums as $file => $checksum ) {
+ // Skip files which get updated
+ if ( 'wp-content' == substr( $file, 0, 10 ) )
+ continue;
+ if ( ! file_exists( ABSPATH . $file ) || md5_file( ABSPATH . $file ) !== $checksum )
+ return false;
+ }
+
+ return true;
+ }
+}
diff --git a/wp-admin/includes/class-file-upload-upgrader.php b/wp-admin/includes/class-file-upload-upgrader.php
new file mode 100644
index 0000000000..b3c09f77ba
--- /dev/null
+++ b/wp-admin/includes/class-file-upload-upgrader.php
@@ -0,0 +1,128 @@
+ false, 'test_type' => false );
+ $file = wp_handle_upload( $_FILES[$form], $overrides );
+
+ if ( isset( $file['error'] ) )
+ wp_die( $file['error'] );
+
+ $this->filename = $_FILES[$form]['name'];
+ $this->package = $file['file'];
+
+ // Construct the object array
+ $object = array(
+ 'post_title' => $this->filename,
+ 'post_content' => $file['url'],
+ 'post_mime_type' => $file['type'],
+ 'guid' => $file['url'],
+ 'context' => 'upgrader',
+ 'post_status' => 'private'
+ );
+
+ // Save the data.
+ $this->id = wp_insert_attachment( $object, $file['file'] );
+
+ // Schedule a cleanup for 2 hours from now in case of failed install.
+ wp_schedule_single_event( time() + 2 * HOUR_IN_SECONDS, 'upgrader_scheduled_cleanup', array( $this->id ) );
+
+ } elseif ( is_numeric( $_GET[$urlholder] ) ) {
+ // Numeric Package = previously uploaded file, see above.
+ $this->id = (int) $_GET[$urlholder];
+ $attachment = get_post( $this->id );
+ if ( empty($attachment) )
+ wp_die(__('Please select a file'));
+
+ $this->filename = $attachment->post_title;
+ $this->package = get_attached_file( $attachment->ID );
+ } else {
+ // Else, It's set to something, Back compat for plugins using the old (pre-3.3) File_Uploader handler.
+ if ( ! ( ( $uploads = wp_upload_dir() ) && false === $uploads['error'] ) )
+ wp_die( $uploads['error'] );
+
+ $this->filename = $_GET[$urlholder];
+ $this->package = $uploads['basedir'] . '/' . $this->filename;
+ }
+ }
+
+ /**
+ * Delete the attachment/uploaded file.
+ *
+ * @since 3.2.2
+ * @access public
+ *
+ * @return bool Whether the cleanup was successful.
+ */
+ public function cleanup() {
+ if ( $this->id )
+ wp_delete_attachment( $this->id );
+
+ elseif ( file_exists( $this->package ) )
+ return @unlink( $this->package );
+
+ return true;
+ }
+}
diff --git a/wp-admin/includes/class-language-pack-upgrader.php b/wp-admin/includes/class-language-pack-upgrader.php
new file mode 100644
index 0000000000..150056cde6
--- /dev/null
+++ b/wp-admin/includes/class-language-pack-upgrader.php
@@ -0,0 +1,352 @@
+is_vcs_checkout( WP_CONTENT_DIR ) ) {
+ return;
+ }
+
+ foreach ( $language_updates as $key => $language_update ) {
+ $update = ! empty( $language_update->autoupdate );
+
+ /**
+ * Filter whether to asynchronously update translation for core, a plugin, or a theme.
+ *
+ * @since 4.0.0
+ *
+ * @param bool $update Whether to update.
+ * @param object $language_update The update offer.
+ */
+ $update = apply_filters( 'async_update_translation', $update, $language_update );
+
+ if ( ! $update ) {
+ unset( $language_updates[ $key ] );
+ }
+ }
+
+ if ( empty( $language_updates ) ) {
+ return;
+ }
+
+ // Re-use the automatic upgrader skin if the parent upgrader is using it.
+ if ( $upgrader && $upgrader->skin instanceof Automatic_Upgrader_Skin ) {
+ $skin = $upgrader->skin;
+ } else {
+ $skin = new Language_Pack_Upgrader_Skin( array(
+ 'skip_header_footer' => true,
+ ) );
+ }
+
+ $lp_upgrader = new Language_Pack_Upgrader( $skin );
+ $lp_upgrader->bulk_upgrade( $language_updates );
+ }
+
+ /**
+ * Initialize the upgrade strings.
+ *
+ * @since 3.7.0
+ * @access public
+ */
+ public function upgrade_strings() {
+ $this->strings['starting_upgrade'] = __( 'Some of your translations need updating. Sit tight for a few more seconds while we update them as well.' );
+ $this->strings['up_to_date'] = __( 'The translation is up to date.' ); // We need to silently skip this case
+ $this->strings['no_package'] = __( 'Update package not available.' );
+ $this->strings['downloading_package'] = __( 'Downloading translation from %s…' );
+ $this->strings['unpack_package'] = __( 'Unpacking the update…' );
+ $this->strings['process_failed'] = __( 'Translation update failed.' );
+ $this->strings['process_success'] = __( 'Translation updated successfully.' );
+ }
+
+ /**
+ * Upgrade a language pack.
+ *
+ * @since 3.7.0
+ * @access public
+ *
+ * @param string|false $update Optional. Whether an update offer is available. Default false.
+ * @param array $args Optional. Other optional arguments, see
+ * Language_Pack_Upgrader::bulk_upgrade(). Default empty array.
+ * @return array|bool|WP_Error The result of the upgrade, or a WP_Error object instead.
+ */
+ public function upgrade( $update = false, $args = array() ) {
+ if ( $update ) {
+ $update = array( $update );
+ }
+
+ $results = $this->bulk_upgrade( $update, $args );
+
+ if ( ! is_array( $results ) ) {
+ return $results;
+ }
+
+ return $results[0];
+ }
+
+ /**
+ * Bulk upgrade language packs.
+ *
+ * @since 3.7.0
+ * @access public
+ *
+ * @global WP_Filesystem_Base $wp_filesystem Subclass
+ *
+ * @param array $language_updates Optional. Language pack updates. Default empty array.
+ * @param array $args {
+ * Optional. Other arguments for upgrading multiple language packs. Default empty array
+ *
+ * @type bool $clear_update_cache Whether to clear the update cache when done.
+ * Default true.
+ * }
+ * @return array|bool|WP_Error Will return an array of results, or true if there are no updates,
+ * false or WP_Error for initial errors.
+ */
+ public function bulk_upgrade( $language_updates = array(), $args = array() ) {
+ global $wp_filesystem;
+
+ $defaults = array(
+ 'clear_update_cache' => true,
+ );
+ $parsed_args = wp_parse_args( $args, $defaults );
+
+ $this->init();
+ $this->upgrade_strings();
+
+ if ( ! $language_updates )
+ $language_updates = wp_get_translation_updates();
+
+ if ( empty( $language_updates ) ) {
+ $this->skin->header();
+ $this->skin->before();
+ $this->skin->set_result( true );
+ $this->skin->feedback( 'up_to_date' );
+ $this->skin->after();
+ $this->skin->bulk_footer();
+ $this->skin->footer();
+ return true;
+ }
+
+ if ( 'upgrader_process_complete' == current_filter() )
+ $this->skin->feedback( 'starting_upgrade' );
+
+ // Remove any existing upgrade filters from the plugin/theme upgraders #WP29425 & #WP29230
+ remove_all_filters( 'upgrader_pre_install' );
+ remove_all_filters( 'upgrader_clear_destination' );
+ remove_all_filters( 'upgrader_post_install' );
+ remove_all_filters( 'upgrader_source_selection' );
+
+ add_filter( 'upgrader_source_selection', array( $this, 'check_package' ), 10, 2 );
+
+ $this->skin->header();
+
+ // Connect to the Filesystem first.
+ $res = $this->fs_connect( array( WP_CONTENT_DIR, WP_LANG_DIR ) );
+ if ( ! $res ) {
+ $this->skin->footer();
+ return false;
+ }
+
+ $results = array();
+
+ $this->update_count = count( $language_updates );
+ $this->update_current = 0;
+
+ /*
+ * The filesystem's mkdir() is not recursive. Make sure WP_LANG_DIR exists,
+ * as we then may need to create a /plugins or /themes directory inside of it.
+ */
+ $remote_destination = $wp_filesystem->find_folder( WP_LANG_DIR );
+ if ( ! $wp_filesystem->exists( $remote_destination ) )
+ if ( ! $wp_filesystem->mkdir( $remote_destination, FS_CHMOD_DIR ) )
+ return new WP_Error( 'mkdir_failed_lang_dir', $this->strings['mkdir_failed'], $remote_destination );
+
+ foreach ( $language_updates as $language_update ) {
+
+ $this->skin->language_update = $language_update;
+
+ $destination = WP_LANG_DIR;
+ if ( 'plugin' == $language_update->type )
+ $destination .= '/plugins';
+ elseif ( 'theme' == $language_update->type )
+ $destination .= '/themes';
+
+ $this->update_current++;
+
+ $options = array(
+ 'package' => $language_update->package,
+ 'destination' => $destination,
+ 'clear_destination' => false,
+ 'abort_if_destination_exists' => false, // We expect the destination to exist.
+ 'clear_working' => true,
+ 'is_multi' => true,
+ 'hook_extra' => array(
+ 'language_update_type' => $language_update->type,
+ 'language_update' => $language_update,
+ )
+ );
+
+ $result = $this->run( $options );
+
+ $results[] = $this->result;
+
+ // Prevent credentials auth screen from displaying multiple times.
+ if ( false === $result )
+ break;
+ }
+
+ $this->skin->bulk_footer();
+
+ $this->skin->footer();
+
+ // Clean up our hooks, in case something else does an upgrade on this connection.
+ remove_filter( 'upgrader_source_selection', array( $this, 'check_package' ) );
+
+ if ( $parsed_args['clear_update_cache'] ) {
+ wp_clean_update_cache();
+ }
+
+ return $results;
+ }
+
+ /**
+ * Check the package source to make sure there are .mo and .po files.
+ *
+ * Hooked to the {@see 'upgrader_source_selection'} filter by
+ * Language_Pack_Upgrader::bulk_upgrade().
+ *
+ * @since 3.7.0
+ * @access public
+ *
+ * @global WP_Filesystem_Base $wp_filesystem Subclass
+ *
+ * @param string|WP_Error $source
+ * @param string $remote_source
+ */
+ public function check_package( $source, $remote_source ) {
+ global $wp_filesystem;
+
+ if ( is_wp_error( $source ) )
+ return $source;
+
+ // Check that the folder contains a valid language.
+ $files = $wp_filesystem->dirlist( $remote_source );
+
+ // Check to see if a .po and .mo exist in the folder.
+ $po = $mo = false;
+ foreach ( (array) $files as $file => $filedata ) {
+ if ( '.po' == substr( $file, -3 ) )
+ $po = true;
+ elseif ( '.mo' == substr( $file, -3 ) )
+ $mo = true;
+ }
+
+ if ( ! $mo || ! $po ) {
+ return new WP_Error( 'incompatible_archive_pomo', $this->strings['incompatible_archive'],
+ /* translators: 1: .po 2: .mo */
+ sprintf( __( 'The language pack is missing either the %1$s or %2$s files.' ),
+ '.po',
+ '.mo'
+ )
+ );
+ }
+
+ return $source;
+ }
+
+ /**
+ * Get the name of an item being updated.
+ *
+ * @since 3.7.0
+ * @access public
+ *
+ * @param object $update The data for an update.
+ * @return string The name of the item being updated.
+ */
+ public function get_name_for_update( $update ) {
+ switch ( $update->type ) {
+ case 'core':
+ return 'WordPress'; // Not translated
+
+ case 'theme':
+ $theme = wp_get_theme( $update->slug );
+ if ( $theme->exists() )
+ return $theme->Get( 'Name' );
+ break;
+ case 'plugin':
+ $plugin_data = get_plugins( '/' . $update->slug );
+ $plugin_data = reset( $plugin_data );
+ if ( $plugin_data )
+ return $plugin_data['Name'];
+ break;
+ }
+ return '';
+ }
+
+}
diff --git a/wp-admin/includes/class-plugin-upgrader.php b/wp-admin/includes/class-plugin-upgrader.php
new file mode 100644
index 0000000000..7fec925b52
--- /dev/null
+++ b/wp-admin/includes/class-plugin-upgrader.php
@@ -0,0 +1,484 @@
+strings['up_to_date'] = __('The plugin is at the latest version.');
+ $this->strings['no_package'] = __('Update package not available.');
+ $this->strings['downloading_package'] = __('Downloading update from %s…');
+ $this->strings['unpack_package'] = __('Unpacking the update…');
+ $this->strings['remove_old'] = __('Removing the old version of the plugin…');
+ $this->strings['remove_old_failed'] = __('Could not remove the old plugin.');
+ $this->strings['process_failed'] = __('Plugin update failed.');
+ $this->strings['process_success'] = __('Plugin updated successfully.');
+ $this->strings['process_bulk_success'] = __('Plugins updated successfully.');
+ }
+
+ /**
+ * Initialize the install strings.
+ *
+ * @since 2.8.0
+ * @access public
+ */
+ public function install_strings() {
+ $this->strings['no_package'] = __('Install package not available.');
+ $this->strings['downloading_package'] = __('Downloading install package from %s…');
+ $this->strings['unpack_package'] = __('Unpacking the package…');
+ $this->strings['installing_package'] = __('Installing the plugin…');
+ $this->strings['no_files'] = __('The plugin contains no files.');
+ $this->strings['process_failed'] = __('Plugin install failed.');
+ $this->strings['process_success'] = __('Plugin installed successfully.');
+ }
+
+ /**
+ * Install a plugin package.
+ *
+ * @since 2.8.0
+ * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional.
+ * @access public
+ *
+ * @param string $package The full local path or URI of the package.
+ * @param array $args {
+ * Optional. Other arguments for installing a plugin package. Default empty array.
+ *
+ * @type bool $clear_update_cache Whether to clear the plugin updates cache if successful.
+ * Default true.
+ * }
+ * @return bool|WP_Error True if the install was successful, false or a WP_Error otherwise.
+ */
+ public function install( $package, $args = array() ) {
+
+ $defaults = array(
+ 'clear_update_cache' => true,
+ );
+ $parsed_args = wp_parse_args( $args, $defaults );
+
+ $this->init();
+ $this->install_strings();
+
+ add_filter('upgrader_source_selection', array($this, 'check_package') );
+ // Clear cache so wp_update_plugins() knows about the new plugin.
+ add_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9, 0 );
+
+ $this->run( array(
+ 'package' => $package,
+ 'destination' => WP_PLUGIN_DIR,
+ 'clear_destination' => false, // Do not overwrite files.
+ 'clear_working' => true,
+ 'hook_extra' => array(
+ 'type' => 'plugin',
+ 'action' => 'install',
+ )
+ ) );
+
+ remove_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9 );
+ remove_filter('upgrader_source_selection', array($this, 'check_package') );
+
+ if ( ! $this->result || is_wp_error($this->result) )
+ return $this->result;
+
+ // Force refresh of plugin update information
+ wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
+
+ return true;
+ }
+
+ /**
+ * Upgrade a plugin.
+ *
+ * @since 2.8.0
+ * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional.
+ * @access public
+ *
+ * @param string $plugin The basename path to the main plugin file.
+ * @param array $args {
+ * Optional. Other arguments for upgrading a plugin package. Default empty array.
+ *
+ * @type bool $clear_update_cache Whether to clear the plugin updates cache if successful.
+ * Default true.
+ * }
+ * @return bool|WP_Error True if the upgrade was successful, false or a WP_Error object otherwise.
+ */
+ public function upgrade( $plugin, $args = array() ) {
+
+ $defaults = array(
+ 'clear_update_cache' => true,
+ );
+ $parsed_args = wp_parse_args( $args, $defaults );
+
+ $this->init();
+ $this->upgrade_strings();
+
+ $current = get_site_transient( 'update_plugins' );
+ if ( !isset( $current->response[ $plugin ] ) ) {
+ $this->skin->before();
+ $this->skin->set_result(false);
+ $this->skin->error('up_to_date');
+ $this->skin->after();
+ return false;
+ }
+
+ // Get the URL to the zip file
+ $r = $current->response[ $plugin ];
+
+ add_filter('upgrader_pre_install', array($this, 'deactivate_plugin_before_upgrade'), 10, 2);
+ add_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'), 10, 4);
+ //'source_selection' => array($this, 'source_selection'), //there's a trac ticket to move up the directory for zip's which are made a bit differently, useful for non-.org plugins.
+ // Clear cache so wp_update_plugins() knows about the new plugin.
+ add_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9, 0 );
+
+ $this->run( array(
+ 'package' => $r->package,
+ 'destination' => WP_PLUGIN_DIR,
+ 'clear_destination' => true,
+ 'clear_working' => true,
+ 'hook_extra' => array(
+ 'plugin' => $plugin,
+ 'type' => 'plugin',
+ 'action' => 'update',
+ ),
+ ) );
+
+ // Cleanup our hooks, in case something else does a upgrade on this connection.
+ remove_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9 );
+ remove_filter('upgrader_pre_install', array($this, 'deactivate_plugin_before_upgrade'));
+ remove_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'));
+
+ if ( ! $this->result || is_wp_error($this->result) )
+ return $this->result;
+
+ // Force refresh of plugin update information
+ wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
+
+ return true;
+ }
+
+ /**
+ * Bulk upgrade several plugins at once.
+ *
+ * @since 2.8.0
+ * @since 3.7.0 The `$args` parameter was added, making clearing the plugin update cache optional.
+ * @access public
+ *
+ * @param array $plugins Array of the basename paths of the plugins' main files.
+ * @param array $args {
+ * Optional. Other arguments for upgrading several plugins at once. Default empty array.
+ *
+ * @type bool $clear_update_cache Whether to clear the plugin updates cache if successful.
+ * Default true.
+ * }
+ * @return array|false An array of results indexed by plugin file, or false if unable to connect to the filesystem.
+ */
+ public function bulk_upgrade( $plugins, $args = array() ) {
+
+ $defaults = array(
+ 'clear_update_cache' => true,
+ );
+ $parsed_args = wp_parse_args( $args, $defaults );
+
+ $this->init();
+ $this->bulk = true;
+ $this->upgrade_strings();
+
+ $current = get_site_transient( 'update_plugins' );
+
+ add_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'), 10, 4);
+ add_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9, 0 );
+
+ $this->skin->header();
+
+ // Connect to the Filesystem first.
+ $res = $this->fs_connect( array(WP_CONTENT_DIR, WP_PLUGIN_DIR) );
+ if ( ! $res ) {
+ $this->skin->footer();
+ return false;
+ }
+
+ $this->skin->bulk_header();
+
+ /*
+ * Only start maintenance mode if:
+ * - running Multisite and there are one or more plugins specified, OR
+ * - a plugin with an update available is currently active.
+ * @TODO: For multisite, maintenance mode should only kick in for individual sites if at all possible.
+ */
+ $maintenance = ( is_multisite() && ! empty( $plugins ) );
+ foreach ( $plugins as $plugin )
+ $maintenance = $maintenance || ( is_plugin_active( $plugin ) && isset( $current->response[ $plugin] ) );
+ if ( $maintenance )
+ $this->maintenance_mode(true);
+
+ $results = array();
+
+ $this->update_count = count($plugins);
+ $this->update_current = 0;
+ foreach ( $plugins as $plugin ) {
+ $this->update_current++;
+ $this->skin->plugin_info = get_plugin_data( WP_PLUGIN_DIR . '/' . $plugin, false, true);
+
+ if ( !isset( $current->response[ $plugin ] ) ) {
+ $this->skin->set_result('up_to_date');
+ $this->skin->before();
+ $this->skin->feedback('up_to_date');
+ $this->skin->after();
+ $results[$plugin] = true;
+ continue;
+ }
+
+ // Get the URL to the zip file.
+ $r = $current->response[ $plugin ];
+
+ $this->skin->plugin_active = is_plugin_active($plugin);
+
+ $result = $this->run( array(
+ 'package' => $r->package,
+ 'destination' => WP_PLUGIN_DIR,
+ 'clear_destination' => true,
+ 'clear_working' => true,
+ 'is_multi' => true,
+ 'hook_extra' => array(
+ 'plugin' => $plugin
+ )
+ ) );
+
+ $results[$plugin] = $this->result;
+
+ // Prevent credentials auth screen from displaying multiple times
+ if ( false === $result )
+ break;
+ } //end foreach $plugins
+
+ $this->maintenance_mode(false);
+
+ /**
+ * Fires when the bulk upgrader process is complete.
+ *
+ * @since 3.6.0
+ *
+ * @param Plugin_Upgrader $this Plugin_Upgrader instance. In other contexts, $this, might
+ * be a Theme_Upgrader or Core_Upgrade instance.
+ * @param array $data {
+ * Array of bulk item update data.
+ *
+ * @type string $action Type of action. Default 'update'.
+ * @type string $type Type of update process. Accepts 'plugin', 'theme', or 'core'.
+ * @type bool $bulk Whether the update process is a bulk update. Default true.
+ * @type array $packages Array of plugin, theme, or core packages to update.
+ * }
+ */
+ do_action( 'upgrader_process_complete', $this, array(
+ 'action' => 'update',
+ 'type' => 'plugin',
+ 'bulk' => true,
+ 'plugins' => $plugins,
+ ) );
+
+ $this->skin->bulk_footer();
+
+ $this->skin->footer();
+
+ // Cleanup our hooks, in case something else does a upgrade on this connection.
+ remove_action( 'upgrader_process_complete', 'wp_clean_plugins_cache', 9 );
+ remove_filter('upgrader_clear_destination', array($this, 'delete_old_plugin'));
+
+ // Force refresh of plugin update information.
+ wp_clean_plugins_cache( $parsed_args['clear_update_cache'] );
+
+ return $results;
+ }
+
+ /**
+ * Check a source package to be sure it contains a plugin.
+ *
+ * This function is added to the {@see 'upgrader_source_selection'} filter by
+ * Plugin_Upgrader::install().
+ *
+ * @since 3.3.0
+ * @access public
+ *
+ * @global WP_Filesystem_Base $wp_filesystem Subclass
+ *
+ * @param string $source The path to the downloaded package source.
+ * @return string|WP_Error The source as passed, or a WP_Error object
+ * if no plugins were found.
+ */
+ public function check_package($source) {
+ global $wp_filesystem;
+
+ if ( is_wp_error($source) )
+ return $source;
+
+ $working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit(WP_CONTENT_DIR), $source);
+ if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, let's not prevent installation.
+ return $source;
+
+ // Check the folder contains at least 1 valid plugin.
+ $plugins_found = false;
+ $files = glob( $working_directory . '*.php' );
+ if ( $files ) {
+ foreach ( $files as $file ) {
+ $info = get_plugin_data( $file, false, false );
+ if ( ! empty( $info['Name'] ) ) {
+ $plugins_found = true;
+ break;
+ }
+ }
+ }
+
+ if ( ! $plugins_found )
+ return new WP_Error( 'incompatible_archive_no_plugins', $this->strings['incompatible_archive'], __( 'No valid plugins were found.' ) );
+
+ return $source;
+ }
+
+ /**
+ * Retrieve the path to the file that contains the plugin info.
+ *
+ * This isn't used internally in the class, but is called by the skins.
+ *
+ * @since 2.8.0
+ * @access public
+ *
+ * @return string|false The full path to the main plugin file, or false.
+ */
+ public function plugin_info() {
+ if ( ! is_array($this->result) )
+ return false;
+ if ( empty($this->result['destination_name']) )
+ return false;
+
+ $plugin = get_plugins('/' . $this->result['destination_name']); //Ensure to pass with leading slash
+ if ( empty($plugin) )
+ return false;
+
+ $pluginfiles = array_keys($plugin); //Assume the requested plugin is the first in the list
+
+ return $this->result['destination_name'] . '/' . $pluginfiles[0];
+ }
+
+ /**
+ * Deactivates a plugin before it is upgraded.
+ *
+ * Hooked to the {@see 'upgrader_pre_install'} filter by Plugin_Upgrader::upgrade().
+ *
+ * @since 2.8.0
+ * @since 4.1.0 Added a return value.
+ * @access public
+ *
+ * @param bool|WP_Error $return Upgrade offer return.
+ * @param array $plugin Plugin package arguments.
+ * @return bool|WP_Error The passed in $return param or WP_Error.
+ */
+ public function deactivate_plugin_before_upgrade($return, $plugin) {
+
+ if ( is_wp_error($return) ) //Bypass.
+ return $return;
+
+ // When in cron (background updates) don't deactivate the plugin, as we require a browser to reactivate it
+ if ( defined( 'DOING_CRON' ) && DOING_CRON )
+ return $return;
+
+ $plugin = isset($plugin['plugin']) ? $plugin['plugin'] : '';
+ if ( empty($plugin) )
+ return new WP_Error('bad_request', $this->strings['bad_request']);
+
+ if ( is_plugin_active($plugin) ) {
+ //Deactivate the plugin silently, Prevent deactivation hooks from running.
+ deactivate_plugins($plugin, true);
+ }
+
+ return $return;
+ }
+
+ /**
+ * Delete the old plugin during an upgrade.
+ *
+ * Hooked to the {@see 'upgrader_clear_destination'} filter by
+ * Plugin_Upgrader::upgrade() and Plugin_Upgrader::bulk_upgrade().
+ *
+ * @since 2.8.0
+ * @access public
+ *
+ * @global WP_Filesystem_Base $wp_filesystem Subclass
+ *
+ * @param bool|WP_Error $removed
+ * @param string $local_destination
+ * @param string $remote_destination
+ * @param array $plugin
+ * @return WP_Error|bool
+ */
+ public function delete_old_plugin($removed, $local_destination, $remote_destination, $plugin) {
+ global $wp_filesystem;
+
+ if ( is_wp_error($removed) )
+ return $removed; //Pass errors through.
+
+ $plugin = isset($plugin['plugin']) ? $plugin['plugin'] : '';
+ if ( empty($plugin) )
+ return new WP_Error('bad_request', $this->strings['bad_request']);
+
+ $plugins_dir = $wp_filesystem->wp_plugins_dir();
+ $this_plugin_dir = trailingslashit( dirname($plugins_dir . $plugin) );
+
+ if ( ! $wp_filesystem->exists($this_plugin_dir) ) //If it's already vanished.
+ return $removed;
+
+ // If plugin is in its own directory, recursively delete the directory.
+ if ( strpos($plugin, '/') && $this_plugin_dir != $plugins_dir ) //base check on if plugin includes directory separator AND that it's not the root plugin folder
+ $deleted = $wp_filesystem->delete($this_plugin_dir, true);
+ else
+ $deleted = $wp_filesystem->delete($plugins_dir . $plugin);
+
+ if ( ! $deleted )
+ return new WP_Error('remove_old_failed', $this->strings['remove_old_failed']);
+
+ return true;
+ }
+}
diff --git a/wp-admin/includes/class-theme-upgrader.php b/wp-admin/includes/class-theme-upgrader.php
new file mode 100644
index 0000000000..8c6831d25f
--- /dev/null
+++ b/wp-admin/includes/class-theme-upgrader.php
@@ -0,0 +1,606 @@
+strings['up_to_date'] = __('The theme is at the latest version.');
+ $this->strings['no_package'] = __('Update package not available.');
+ $this->strings['downloading_package'] = __('Downloading update from %s…');
+ $this->strings['unpack_package'] = __('Unpacking the update…');
+ $this->strings['remove_old'] = __('Removing the old version of the theme…');
+ $this->strings['remove_old_failed'] = __('Could not remove the old theme.');
+ $this->strings['process_failed'] = __('Theme update failed.');
+ $this->strings['process_success'] = __('Theme updated successfully.');
+ }
+
+ /**
+ * Initialize the install strings.
+ *
+ * @since 2.8.0
+ * @access public
+ */
+ public function install_strings() {
+ $this->strings['no_package'] = __('Install package not available.');
+ $this->strings['downloading_package'] = __('Downloading install package from %s…');
+ $this->strings['unpack_package'] = __('Unpacking the package…');
+ $this->strings['installing_package'] = __('Installing the theme…');
+ $this->strings['no_files'] = __('The theme contains no files.');
+ $this->strings['process_failed'] = __('Theme install failed.');
+ $this->strings['process_success'] = __('Theme installed successfully.');
+ /* translators: 1: theme name, 2: version */
+ $this->strings['process_success_specific'] = __('Successfully installed the theme %1$s %2$s.');
+ $this->strings['parent_theme_search'] = __('This theme requires a parent theme. Checking if it is installed…');
+ /* translators: 1: theme name, 2: version */
+ $this->strings['parent_theme_prepare_install'] = __('Preparing to install %1$s %2$s…');
+ /* translators: 1: theme name, 2: version */
+ $this->strings['parent_theme_currently_installed'] = __('The parent theme, %1$s %2$s, is currently installed.');
+ /* translators: 1: theme name, 2: version */
+ $this->strings['parent_theme_install_success'] = __('Successfully installed the parent theme, %1$s %2$s.');
+ $this->strings['parent_theme_not_found'] = __('The parent theme could not be found. You will need to install the parent theme, %s, before you can use this child theme.');
+ }
+
+ /**
+ * Check if a child theme is being installed and we need to install its parent.
+ *
+ * Hooked to the {@see 'upgrader_post_install'} filter by Theme_Upgrader::install().
+ *
+ * @since 3.4.0
+ * @access public
+ *
+ * @param bool $install_result
+ * @param array $hook_extra
+ * @param array $child_result
+ * @return type
+ */
+ public function check_parent_theme_filter( $install_result, $hook_extra, $child_result ) {
+ // Check to see if we need to install a parent theme
+ $theme_info = $this->theme_info();
+
+ if ( ! $theme_info->parent() )
+ return $install_result;
+
+ $this->skin->feedback( 'parent_theme_search' );
+
+ if ( ! $theme_info->parent()->errors() ) {
+ $this->skin->feedback( 'parent_theme_currently_installed', $theme_info->parent()->display('Name'), $theme_info->parent()->display('Version') );
+ // We already have the theme, fall through.
+ return $install_result;
+ }
+
+ // We don't have the parent theme, let's install it.
+ $api = themes_api('theme_information', array('slug' => $theme_info->get('Template'), 'fields' => array('sections' => false, 'tags' => false) ) ); //Save on a bit of bandwidth.
+
+ if ( ! $api || is_wp_error($api) ) {
+ $this->skin->feedback( 'parent_theme_not_found', $theme_info->get('Template') );
+ // Don't show activate or preview actions after install
+ add_filter('install_theme_complete_actions', array($this, 'hide_activate_preview_actions') );
+ return $install_result;
+ }
+
+ // Backup required data we're going to override:
+ $child_api = $this->skin->api;
+ $child_success_message = $this->strings['process_success'];
+
+ // Override them
+ $this->skin->api = $api;
+ $this->strings['process_success_specific'] = $this->strings['parent_theme_install_success'];//, $api->name, $api->version);
+
+ $this->skin->feedback('parent_theme_prepare_install', $api->name, $api->version);
+
+ add_filter('install_theme_complete_actions', '__return_false', 999); // Don't show any actions after installing the theme.
+
+ // Install the parent theme
+ $parent_result = $this->run( array(
+ 'package' => $api->download_link,
+ 'destination' => get_theme_root(),
+ 'clear_destination' => false, //Do not overwrite files.
+ 'clear_working' => true
+ ) );
+
+ if ( is_wp_error($parent_result) )
+ add_filter('install_theme_complete_actions', array($this, 'hide_activate_preview_actions') );
+
+ // Start cleaning up after the parents installation
+ remove_filter('install_theme_complete_actions', '__return_false', 999);
+
+ // Reset child's result and data
+ $this->result = $child_result;
+ $this->skin->api = $child_api;
+ $this->strings['process_success'] = $child_success_message;
+
+ return $install_result;
+ }
+
+ /**
+ * Don't display the activate and preview actions to the user.
+ *
+ * Hooked to the {@see 'install_theme_complete_actions'} filter by
+ * Theme_Upgrader::check_parent_theme_filter() when installing
+ * a child theme and installing the parent theme fails.
+ *
+ * @since 3.4.0
+ * @access public
+ *
+ * @param array $actions Preview actions.
+ * @return array
+ */
+ public function hide_activate_preview_actions( $actions ) {
+ unset($actions['activate'], $actions['preview']);
+ return $actions;
+ }
+
+ /**
+ * Install a theme package.
+ *
+ * @since 2.8.0
+ * @since 3.7.0 The `$args` parameter was added, making clearing the update cache optional.
+ * @access public
+ *
+ * @param string $package The full local path or URI of the package.
+ * @param array $args {
+ * Optional. Other arguments for installing a theme package. Default empty array.
+ *
+ * @type bool $clear_update_cache Whether to clear the updates cache if successful.
+ * Default true.
+ * }
+ *
+ * @return bool|WP_Error True if the install was successful, false or a WP_Error object otherwise.
+ */
+ public function install( $package, $args = array() ) {
+
+ $defaults = array(
+ 'clear_update_cache' => true,
+ );
+ $parsed_args = wp_parse_args( $args, $defaults );
+
+ $this->init();
+ $this->install_strings();
+
+ add_filter('upgrader_source_selection', array($this, 'check_package') );
+ add_filter('upgrader_post_install', array($this, 'check_parent_theme_filter'), 10, 3);
+ // Clear cache so wp_update_themes() knows about the new theme.
+ add_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9, 0 );
+
+ $this->run( array(
+ 'package' => $package,
+ 'destination' => get_theme_root(),
+ 'clear_destination' => false, //Do not overwrite files.
+ 'clear_working' => true,
+ 'hook_extra' => array(
+ 'type' => 'theme',
+ 'action' => 'install',
+ ),
+ ) );
+
+ remove_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9 );
+ remove_filter('upgrader_source_selection', array($this, 'check_package') );
+ remove_filter('upgrader_post_install', array($this, 'check_parent_theme_filter'));
+
+ if ( ! $this->result || is_wp_error($this->result) )
+ return $this->result;
+
+ // Refresh the Theme Update information
+ wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
+
+ return true;
+ }
+
+ /**
+ * Upgrade a theme.
+ *
+ * @since 2.8.0
+ * @since 3.7.0 The `$args` parameter was added, making clearing the update cache optional.
+ * @access public
+ *
+ * @param string $theme The theme slug.
+ * @param array $args {
+ * Optional. Other arguments for upgrading a theme. Default empty array.
+ *
+ * @type bool $clear_update_cache Whether to clear the update cache if successful.
+ * Default true.
+ * }
+ * @return bool|WP_Error True if the upgrade was successful, false or a WP_Error object otherwise.
+ */
+ public function upgrade( $theme, $args = array() ) {
+
+ $defaults = array(
+ 'clear_update_cache' => true,
+ );
+ $parsed_args = wp_parse_args( $args, $defaults );
+
+ $this->init();
+ $this->upgrade_strings();
+
+ // Is an update available?
+ $current = get_site_transient( 'update_themes' );
+ if ( !isset( $current->response[ $theme ] ) ) {
+ $this->skin->before();
+ $this->skin->set_result(false);
+ $this->skin->error( 'up_to_date' );
+ $this->skin->after();
+ return false;
+ }
+
+ $r = $current->response[ $theme ];
+
+ add_filter('upgrader_pre_install', array($this, 'current_before'), 10, 2);
+ add_filter('upgrader_post_install', array($this, 'current_after'), 10, 2);
+ add_filter('upgrader_clear_destination', array($this, 'delete_old_theme'), 10, 4);
+ // Clear cache so wp_update_themes() knows about the new theme.
+ add_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9, 0 );
+
+ $this->run( array(
+ 'package' => $r['package'],
+ 'destination' => get_theme_root( $theme ),
+ 'clear_destination' => true,
+ 'clear_working' => true,
+ 'hook_extra' => array(
+ 'theme' => $theme,
+ 'type' => 'theme',
+ 'action' => 'update',
+ ),
+ ) );
+
+ remove_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9 );
+ remove_filter('upgrader_pre_install', array($this, 'current_before'));
+ remove_filter('upgrader_post_install', array($this, 'current_after'));
+ remove_filter('upgrader_clear_destination', array($this, 'delete_old_theme'));
+
+ if ( ! $this->result || is_wp_error($this->result) )
+ return $this->result;
+
+ wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
+
+ return true;
+ }
+
+ /**
+ * Upgrade several themes at once.
+ *
+ * @since 3.0.0
+ * @since 3.7.0 The `$args` parameter was added, making clearing the update cache optional.
+ * @access public
+ *
+ * @param array $themes The theme slugs.
+ * @param array $args {
+ * Optional. Other arguments for upgrading several themes at once. Default empty array.
+ *
+ * @type bool $clear_update_cache Whether to clear the update cache if successful.
+ * Default true.
+ * }
+ * @return array[]|false An array of results, or false if unable to connect to the filesystem.
+ */
+ public function bulk_upgrade( $themes, $args = array() ) {
+
+ $defaults = array(
+ 'clear_update_cache' => true,
+ );
+ $parsed_args = wp_parse_args( $args, $defaults );
+
+ $this->init();
+ $this->bulk = true;
+ $this->upgrade_strings();
+
+ $current = get_site_transient( 'update_themes' );
+
+ add_filter('upgrader_pre_install', array($this, 'current_before'), 10, 2);
+ add_filter('upgrader_post_install', array($this, 'current_after'), 10, 2);
+ add_filter('upgrader_clear_destination', array($this, 'delete_old_theme'), 10, 4);
+ // Clear cache so wp_update_themes() knows about the new theme.
+ add_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9, 0 );
+
+ $this->skin->header();
+
+ // Connect to the Filesystem first.
+ $res = $this->fs_connect( array(WP_CONTENT_DIR) );
+ if ( ! $res ) {
+ $this->skin->footer();
+ return false;
+ }
+
+ $this->skin->bulk_header();
+
+ // Only start maintenance mode if:
+ // - running Multisite and there are one or more themes specified, OR
+ // - a theme with an update available is currently in use.
+ // @TODO: For multisite, maintenance mode should only kick in for individual sites if at all possible.
+ $maintenance = ( is_multisite() && ! empty( $themes ) );
+ foreach ( $themes as $theme )
+ $maintenance = $maintenance || $theme == get_stylesheet() || $theme == get_template();
+ if ( $maintenance )
+ $this->maintenance_mode(true);
+
+ $results = array();
+
+ $this->update_count = count($themes);
+ $this->update_current = 0;
+ foreach ( $themes as $theme ) {
+ $this->update_current++;
+
+ $this->skin->theme_info = $this->theme_info($theme);
+
+ if ( !isset( $current->response[ $theme ] ) ) {
+ $this->skin->set_result(true);
+ $this->skin->before();
+ $this->skin->feedback( 'up_to_date' );
+ $this->skin->after();
+ $results[$theme] = true;
+ continue;
+ }
+
+ // Get the URL to the zip file
+ $r = $current->response[ $theme ];
+
+ $result = $this->run( array(
+ 'package' => $r['package'],
+ 'destination' => get_theme_root( $theme ),
+ 'clear_destination' => true,
+ 'clear_working' => true,
+ 'is_multi' => true,
+ 'hook_extra' => array(
+ 'theme' => $theme
+ ),
+ ) );
+
+ $results[$theme] = $this->result;
+
+ // Prevent credentials auth screen from displaying multiple times
+ if ( false === $result )
+ break;
+ } //end foreach $plugins
+
+ $this->maintenance_mode(false);
+
+ /** This action is documented in wp-admin/includes/class-wp-upgrader.php */
+ do_action( 'upgrader_process_complete', $this, array(
+ 'action' => 'update',
+ 'type' => 'theme',
+ 'bulk' => true,
+ 'themes' => $themes,
+ ) );
+
+ $this->skin->bulk_footer();
+
+ $this->skin->footer();
+
+ // Cleanup our hooks, in case something else does a upgrade on this connection.
+ remove_action( 'upgrader_process_complete', 'wp_clean_themes_cache', 9 );
+ remove_filter('upgrader_pre_install', array($this, 'current_before'));
+ remove_filter('upgrader_post_install', array($this, 'current_after'));
+ remove_filter('upgrader_clear_destination', array($this, 'delete_old_theme'));
+
+ // Refresh the Theme Update information
+ wp_clean_themes_cache( $parsed_args['clear_update_cache'] );
+
+ return $results;
+ }
+
+ /**
+ * Check that the package source contains a valid theme.
+ *
+ * Hooked to the {@see 'upgrader_source_selection'} filter by Theme_Upgrader::install().
+ * It will return an error if the theme doesn't have style.css or index.php
+ * files.
+ *
+ * @since 3.3.0
+ * @access public
+ *
+ * @global WP_Filesystem_Base $wp_filesystem Subclass
+ *
+ * @param string $source The full path to the package source.
+ * @return string|WP_Error The source or a WP_Error.
+ */
+ public function check_package( $source ) {
+ global $wp_filesystem;
+
+ if ( is_wp_error($source) )
+ return $source;
+
+ // Check the folder contains a valid theme
+ $working_directory = str_replace( $wp_filesystem->wp_content_dir(), trailingslashit(WP_CONTENT_DIR), $source);
+ if ( ! is_dir($working_directory) ) // Sanity check, if the above fails, let's not prevent installation.
+ return $source;
+
+ // A proper archive should have a style.css file in the single subdirectory
+ if ( ! file_exists( $working_directory . 'style.css' ) ) {
+ return new WP_Error( 'incompatible_archive_theme_no_style', $this->strings['incompatible_archive'],
+ /* translators: %s: style.css */
+ sprintf( __( 'The theme is missing the %s stylesheet.' ),
+ 'style.css'
+ )
+ );
+ }
+
+ $info = get_file_data( $working_directory . 'style.css', array( 'Name' => 'Theme Name', 'Template' => 'Template' ) );
+
+ if ( empty( $info['Name'] ) ) {
+ return new WP_Error( 'incompatible_archive_theme_no_name', $this->strings['incompatible_archive'],
+ /* translators: %s: style.css */
+ sprintf( __( 'The %s stylesheet doesn’t contain a valid theme header.' ),
+ 'style.css'
+ )
+ );
+ }
+
+ // If it's not a child theme, it must have at least an index.php to be legit.
+ if ( empty( $info['Template'] ) && ! file_exists( $working_directory . 'index.php' ) ) {
+ return new WP_Error( 'incompatible_archive_theme_no_index', $this->strings['incompatible_archive'],
+ /* translators: %s: index.php */
+ sprintf( __( 'The theme is missing the %s file.' ),
+ 'index.php'
+ )
+ );
+ }
+
+ return $source;
+ }
+
+ /**
+ * Turn on maintenance mode before attempting to upgrade the current theme.
+ *
+ * Hooked to the {@see 'upgrader_pre_install'} filter by Theme_Upgrader::upgrade() and
+ * Theme_Upgrader::bulk_upgrade().
+ *
+ * @since 2.8.0
+ * @access public
+ *
+ * @param bool|WP_Error $return
+ * @param array $theme
+ * @return bool|WP_Error
+ */
+ public function current_before($return, $theme) {
+ if ( is_wp_error($return) )
+ return $return;
+
+ $theme = isset($theme['theme']) ? $theme['theme'] : '';
+
+ if ( $theme != get_stylesheet() ) //If not current
+ return $return;
+ //Change to maintenance mode now.
+ if ( ! $this->bulk )
+ $this->maintenance_mode(true);
+
+ return $return;
+ }
+
+ /**
+ * Turn off maintenance mode after upgrading the current theme.
+ *
+ * Hooked to the {@see 'upgrader_post_install'} filter by Theme_Upgrader::upgrade()
+ * and Theme_Upgrader::bulk_upgrade().
+ *
+ * @since 2.8.0
+ * @access public
+ *
+ * @param bool|WP_Error $return
+ * @param array $theme
+ * @return bool|WP_Error
+ */
+ public function current_after($return, $theme) {
+ if ( is_wp_error($return) )
+ return $return;
+
+ $theme = isset($theme['theme']) ? $theme['theme'] : '';
+
+ if ( $theme != get_stylesheet() ) // If not current
+ return $return;
+
+ // Ensure stylesheet name hasn't changed after the upgrade:
+ if ( $theme == get_stylesheet() && $theme != $this->result['destination_name'] ) {
+ wp_clean_themes_cache();
+ $stylesheet = $this->result['destination_name'];
+ switch_theme( $stylesheet );
+ }
+
+ //Time to remove maintenance mode
+ if ( ! $this->bulk )
+ $this->maintenance_mode(false);
+ return $return;
+ }
+
+ /**
+ * Delete the old theme during an upgrade.
+ *
+ * Hooked to the {@see 'upgrader_clear_destination'} filter by Theme_Upgrader::upgrade()
+ * and Theme_Upgrader::bulk_upgrade().
+ *
+ * @since 2.8.0
+ * @access public
+ *
+ * @global WP_Filesystem_Base $wp_filesystem Subclass
+ *
+ * @param bool $removed
+ * @param string $local_destination
+ * @param string $remote_destination
+ * @param array $theme
+ * @return bool
+ */
+ public function delete_old_theme( $removed, $local_destination, $remote_destination, $theme ) {
+ global $wp_filesystem;
+
+ if ( is_wp_error( $removed ) )
+ return $removed; // Pass errors through.
+
+ if ( ! isset( $theme['theme'] ) )
+ return $removed;
+
+ $theme = $theme['theme'];
+ $themes_dir = trailingslashit( $wp_filesystem->wp_themes_dir( $theme ) );
+ if ( $wp_filesystem->exists( $themes_dir . $theme ) ) {
+ if ( ! $wp_filesystem->delete( $themes_dir . $theme, true ) )
+ return false;
+ }
+
+ return true;
+ }
+
+ /**
+ * Get the WP_Theme object for a theme.
+ *
+ * @since 2.8.0
+ * @since 3.0.0 The `$theme` argument was added.
+ * @access public
+ *
+ * @param string $theme The directory name of the theme. This is optional, and if not supplied,
+ * the directory name from the last result will be used.
+ * @return WP_Theme|false The theme's info object, or false `$theme` is not supplied
+ * and the last result isn't set.
+ */
+ public function theme_info($theme = null) {
+
+ if ( empty($theme) ) {
+ if ( !empty($this->result['destination_name']) )
+ $theme = $this->result['destination_name'];
+ else
+ return false;
+ }
+ return wp_get_theme( $theme );
+ }
+
+}
diff --git a/wp-admin/includes/class-wp-automatic-upgrader.php b/wp-admin/includes/class-wp-automatic-upgrader.php
new file mode 100644
index 0000000000..a109f07bc5
--- /dev/null
+++ b/wp-admin/includes/class-wp-automatic-upgrader.php
@@ -0,0 +1,935 @@
+is_disabled() )
+ return false;
+
+ // Only relax the filesystem checks when the update doesn't include new files
+ $allow_relaxed_file_ownership = false;
+ if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
+ $allow_relaxed_file_ownership = true;
+ }
+
+ // If we can't do an auto core update, we may still be able to email the user.
+ if ( ! $skin->request_filesystem_credentials( false, $context, $allow_relaxed_file_ownership ) || $this->is_vcs_checkout( $context ) ) {
+ if ( 'core' == $type )
+ $this->send_core_update_notification_email( $item );
+ return false;
+ }
+
+ // Next up, is this an item we can update?
+ if ( 'core' == $type )
+ $update = Core_Upgrader::should_update_to_version( $item->current );
+ else
+ $update = ! empty( $item->autoupdate );
+
+ /**
+ * Filter whether to automatically update core, a plugin, a theme, or a language.
+ *
+ * The dynamic portion of the hook name, `$type`, refers to the type of update
+ * being checked. Can be 'core', 'theme', 'plugin', or 'translation'.
+ *
+ * Generally speaking, plugins, themes, and major core versions are not updated
+ * by default, while translations and minor and development versions for core
+ * are updated by default.
+ *
+ * See the {@see 'allow_dev_auto_core_updates', {@see 'allow_minor_auto_core_updates'},
+ * and {@see 'allow_major_auto_core_updates'} filters for a more straightforward way to
+ * adjust core updates.
+ *
+ * @since 3.7.0
+ *
+ * @param bool $update Whether to update.
+ * @param object $item The update offer.
+ */
+ $update = apply_filters( 'auto_update_' . $type, $update, $item );
+
+ if ( ! $update ) {
+ if ( 'core' == $type )
+ $this->send_core_update_notification_email( $item );
+ return false;
+ }
+
+ // If it's a core update, are we actually compatible with its requirements?
+ if ( 'core' == $type ) {
+ global $wpdb;
+
+ $php_compat = version_compare( phpversion(), $item->php_version, '>=' );
+ if ( file_exists( WP_CONTENT_DIR . '/db.php' ) && empty( $wpdb->is_mysql ) )
+ $mysql_compat = true;
+ else
+ $mysql_compat = version_compare( $wpdb->db_version(), $item->mysql_version, '>=' );
+
+ if ( ! $php_compat || ! $mysql_compat )
+ return false;
+ }
+
+ return true;
+ }
+
+ /**
+ * Notifies an administrator of a core update.
+ *
+ * @since 3.7.0
+ * @access protected
+ *
+ * @param object $item The update offer.
+ */
+ protected function send_core_update_notification_email( $item ) {
+ $notified = get_site_option( 'auto_core_update_notified' );
+
+ // Don't notify if we've already notified the same email address of the same version.
+ if ( $notified && $notified['email'] == get_site_option( 'admin_email' ) && $notified['version'] == $item->current )
+ return false;
+
+ // See if we need to notify users of a core update.
+ $notify = ! empty( $item->notify_email );
+
+ /**
+ * Filter whether to notify the site administrator of a new core update.
+ *
+ * By default, administrators are notified when the update offer received
+ * from WordPress.org sets a particular flag. This allows some discretion
+ * in if and when to notify.
+ *
+ * This filter is only evaluated once per release. If the same email address
+ * was already notified of the same new version, WordPress won't repeatedly
+ * email the administrator.
+ *
+ * This filter is also used on about.php to check if a plugin has disabled
+ * these notifications.
+ *
+ * @since 3.7.0
+ *
+ * @param bool $notify Whether the site administrator is notified.
+ * @param object $item The update offer.
+ */
+ if ( ! apply_filters( 'send_core_update_notification_email', $notify, $item ) )
+ return false;
+
+ $this->send_email( 'manual', $item );
+ return true;
+ }
+
+ /**
+ * Update an item, if appropriate.
+ *
+ * @since 3.7.0
+ * @access public
+ *
+ * @param string $type The type of update being checked: 'core', 'theme', 'plugin', 'translation'.
+ * @param object $item The update offer.
+ *
+ * @return null|WP_Error
+ */
+ 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':
+ $skin->feedback( __( 'Updating to WordPress %s' ), $item->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' );
+ $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'];
+ $skin->feedback( __( 'Updating plugin: %s' ), $item_name );
+ break;
+ case 'translation':
+ $language_item_name = $upgrader->get_name_for_update( $item );
+ $item_name = sprintf( __( 'Translations for %s' ), $language_item_name );
+ $skin->feedback( sprintf( __( 'Updating translations for %1$s (%2$s)…' ), $language_item_name, $item->language ) );
+ break;
+ }
+
+ $allow_relaxed_file_ownership = false;
+ if ( 'core' == $type && isset( $item->new_files ) && ! $item->new_files ) {
+ $allow_relaxed_file_ownership = true;
+ }
+
+ // Boom, This sites about to get a whole new splash of paint!
+ $upgrade_result = $upgrader->upgrade( $upgrader_item, array(
+ 'clear_update_cache' => false,
+ // Always use partial builds if possible for core updates.
+ 'pre_check_md5' => false,
+ // Only available for core updates.
+ 'attempt_rollback' => true,
+ // Allow relaxed file ownership in some scenarios
+ 'allow_relaxed_file_ownership' => $allow_relaxed_file_ownership,
+ ) );
+
+ // If the filesystem is unavailable, false is returned.
+ if ( false === $upgrade_result ) {
+ $upgrade_result = new WP_Error( 'fs_unavailable', __( 'Could not access filesystem.' ) );
+ }
+
+ if ( 'core' == $type ) {
+ if ( is_wp_error( $upgrade_result ) && ( 'up_to_date' == $upgrade_result->get_error_code() || 'locked' == $upgrade_result->get_error_code() ) ) {
+ // These aren't actual errors, treat it as a skipped-update instead to avoid triggering the post-core update failure routines.
+ return false;
+ }
+
+ // Core doesn't output this, so let's append it so we don't get confused.
+ if ( is_wp_error( $upgrade_result ) ) {
+ $skin->error( __( 'Installation Failed' ), $upgrade_result );
+ } else {
+ $skin->feedback( __( 'WordPress updated successfully' ) );
+ }
+ }
+
+ $this->update_results[ $type ][] = (object) array(
+ 'item' => $item,
+ 'result' => $upgrade_result,
+ 'name' => $item_name,
+ 'messages' => $skin->get_upgrade_messages()
+ );
+
+ return $upgrade_result;
+ }
+
+ /**
+ * Kicks off the background update process, looping through all pending updates.
+ *
+ * @since 3.7.0
+ * @access public
+ *
+ * @global wpdb $wpdb
+ * @global string $wp_version
+ */
+ public function run() {
+ global $wpdb, $wp_version;
+
+ if ( $this->is_disabled() )
+ return;
+
+ if ( ! is_main_network() || ! is_main_site() )
+ return;
+
+ if ( ! WP_Upgrader::create_lock( 'auto_updater' ) )
+ return;
+
+ // Don't automatically run these thins, 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 ) ) {
+ foreach ( $plugin_updates->response as $plugin ) {
+ $this->update( 'plugin', $plugin );
+ }
+ // Force refresh of plugin update information
+ wp_clean_plugins_cache();
+ }
+
+ // 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 ) ) {
+ foreach ( $theme_updates->response as $theme ) {
+ $this->update( 'theme', (object) $theme );
+ }
+ // Force refresh of theme update information
+ wp_clean_themes_cache();
+ }
+
+ // 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 all development installs.
+ if ( ! empty( $this->update_results ) ) {
+ $development_version = false !== strpos( $wp_version, '-' );
+
+ /**
+ * Filter 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] );
+
+ /**
+ * 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' );
+ }
+
+ /**
+ * If we tried to perform a core update, check if we should send an email,
+ * and if we need to avoid processing future updates.
+ *
+ * @since Unknown
+ * @access protected
+ *
+ * @global string $wp_version
+ *
+ * @param object $update_result The result of the core update. Includes the update offer and result.
+ */
+ protected function after_core_update( $update_result ) {
+ global $wp_version;
+
+ $core_update = $update_result->item;
+ $result = $update_result->result;
+
+ if ( ! is_wp_error( $result ) ) {
+ $this->send_email( 'success', $core_update );
+ return;
+ }
+
+ $error_code = $result->get_error_code();
+
+ // Any of these WP_Error codes are critical failures, as in they occurred after we started to copy core files.
+ // We should not try to perform a background update again until there is a successful one-click update performed by the user.
+ $critical = false;
+ if ( $error_code === 'disk_full' || false !== strpos( $error_code, '__copy_dir' ) ) {
+ $critical = true;
+ } elseif ( $error_code === 'rollback_was_required' && is_wp_error( $result->get_error_data()->rollback ) ) {
+ // A rollback is only critical if it failed too.
+ $critical = true;
+ $rollback_result = $result->get_error_data()->rollback;
+ } elseif ( false !== strpos( $error_code, 'do_rollback' ) ) {
+ $critical = true;
+ }
+
+ if ( $critical ) {
+ $critical_data = array(
+ 'attempted' => $core_update->current,
+ 'current' => $wp_version,
+ 'error_code' => $error_code,
+ 'error_data' => $result->get_error_data(),
+ 'timestamp' => time(),
+ 'critical' => true,
+ );
+ if ( isset( $rollback_result ) ) {
+ $critical_data['rollback_code'] = $rollback_result->get_error_code();
+ $critical_data['rollback_data'] = $rollback_result->get_error_data();
+ }
+ update_site_option( 'auto_core_update_failed', $critical_data );
+ $this->send_email( 'critical', $core_update, $result );
+ return;
+ }
+
+ /*
+ * Any other WP_Error code (like download_failed or files_not_writable) occurs before
+ * we tried to copy over core files. Thus, the failures are early and graceful.
+ *
+ * We should avoid trying to perform a background update again for the same version.
+ * But we can try again if another version is released.
+ *
+ * For certain 'transient' failures, like download_failed, we should allow retries.
+ * In fact, let's schedule a special update for an hour from now. (It's possible
+ * the issue could actually be on WordPress.org's side.) If that one fails, then email.
+ */
+ $send = true;
+ $transient_failures = array( 'incompatible_archive', 'download_failed', 'insane_distro', 'locked' );
+ if ( in_array( $error_code, $transient_failures ) && ! get_site_option( 'auto_core_update_failed' ) ) {
+ wp_schedule_single_event( time() + HOUR_IN_SECONDS, 'wp_maybe_auto_update' );
+ $send = false;
+ }
+
+ $n = get_site_option( 'auto_core_update_notified' );
+ // Don't notify if we've already notified the same email address of the same version of the same notification type.
+ if ( $n && 'fail' == $n['type'] && $n['email'] == get_site_option( 'admin_email' ) && $n['version'] == $core_update->current )
+ $send = false;
+
+ update_site_option( 'auto_core_update_failed', array(
+ 'attempted' => $core_update->current,
+ 'current' => $wp_version,
+ 'error_code' => $error_code,
+ 'error_data' => $result->get_error_data(),
+ 'timestamp' => time(),
+ 'retry' => in_array( $error_code, $transient_failures ),
+ ) );
+
+ if ( $send )
+ $this->send_email( 'fail', $core_update, $result );
+ }
+
+ /**
+ * Sends an email upon the completion or failure of a background core update.
+ *
+ * @since 3.7.0
+ * @access protected
+ *
+ * @global string $wp_version
+ *
+ * @param string $type The type of email to send. Can be one of 'success', 'fail', 'manual', 'critical'.
+ * @param object $core_update The update offer that was attempted.
+ * @param mixed $result Optional. The result for the core update. Can be WP_Error.
+ */
+ protected function send_email( $type, $core_update, $result = null ) {
+ update_site_option( 'auto_core_update_notified', array(
+ 'type' => $type,
+ 'email' => get_site_option( 'admin_email' ),
+ 'version' => $core_update->current,
+ 'timestamp' => time(),
+ ) );
+
+ $next_user_core_update = get_preferred_from_update_core();
+ // If the update transient is empty, use the update we just performed
+ if ( ! $next_user_core_update )
+ $next_user_core_update = $core_update;
+ $newer_version_available = ( 'upgrade' == $next_user_core_update->response && version_compare( $next_user_core_update->version, $core_update->version, '>' ) );
+
+ /**
+ * Filter whether to send an email following an automatic background core update.
+ *
+ * @since 3.7.0
+ *
+ * @param bool $send Whether to send the email. Default true.
+ * @param string $type The type of email to send. Can be one of
+ * 'success', 'fail', 'critical'.
+ * @param object $core_update The update offer that was attempted.
+ * @param mixed $result The result for the core update. Can be WP_Error.
+ */
+ if ( 'manual' !== $type && ! apply_filters( 'auto_core_update_send_email', true, $type, $core_update, $result ) )
+ return;
+
+ switch ( $type ) {
+ case 'success' : // We updated.
+ /* translators: 1: Site name, 2: WordPress version number. */
+ $subject = __( '[%1$s] Your site has updated to WordPress %2$s' );
+ break;
+
+ case 'fail' : // We tried to update but couldn't.
+ case 'manual' : // We can't update (and made no attempt).
+ /* translators: 1: Site name, 2: WordPress version number. */
+ $subject = __( '[%1$s] WordPress %2$s is available. Please update!' );
+ break;
+
+ case 'critical' : // We tried to update, started to copy files, then things went wrong.
+ /* translators: 1: Site name. */
+ $subject = __( '[%1$s] URGENT: Your site may be down due to a failed update' );
+ break;
+
+ default :
+ return;
+ }
+
+ // If the auto update is not to the latest version, say that the current version of WP is available instead.
+ $version = 'success' === $type ? $core_update->current : $next_user_core_update->current;
+ $subject = sprintf( $subject, wp_specialchars_decode( get_option( 'blogname' ), ENT_QUOTES ), $version );
+
+ $body = '';
+
+ switch ( $type ) {
+ case 'success' :
+ $body .= sprintf( __( 'Howdy! Your site at %1$s has been updated automatically to WordPress %2$s.' ), home_url(), $core_update->current );
+ $body .= "\n\n";
+ if ( ! $newer_version_available )
+ $body .= __( 'No further action is needed on your part.' ) . ' ';
+
+ // Can only reference the About screen if their update was successful.
+ list( $about_version ) = explode( '-', $core_update->current, 2 );
+ $body .= sprintf( __( "For more on version %s, see the About WordPress screen:" ), $about_version );
+ $body .= "\n" . admin_url( 'about.php' );
+
+ if ( $newer_version_available ) {
+ $body .= "\n\n" . sprintf( __( 'WordPress %s is also now available.' ), $next_user_core_update->current ) . ' ';
+ $body .= __( 'Updating is easy and only takes a few moments:' );
+ $body .= "\n" . network_admin_url( 'update-core.php' );
+ }
+
+ break;
+
+ case 'fail' :
+ case 'manual' :
+ $body .= sprintf( __( 'Please update your site at %1$s to WordPress %2$s.' ), home_url(), $next_user_core_update->current );
+
+ $body .= "\n\n";
+
+ // Don't show this message if there is a newer version available.
+ // Potential for confusion, and also not useful for them to know at this point.
+ if ( 'fail' == $type && ! $newer_version_available )
+ $body .= __( 'We tried but were unable to update your site automatically.' ) . ' ';
+
+ $body .= __( 'Updating is easy and only takes a few moments:' );
+ $body .= "\n" . network_admin_url( 'update-core.php' );
+ break;
+
+ case 'critical' :
+ if ( $newer_version_available )
+ $body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update WordPress to version %2$s.' ), home_url(), $core_update->current );
+ else
+ $body .= sprintf( __( 'Your site at %1$s experienced a critical failure while trying to update to the latest version of WordPress, %2$s.' ), home_url(), $core_update->current );
+
+ $body .= "\n\n" . __( "This means your site may be offline or broken. Don't panic; this can be fixed." );
+
+ $body .= "\n\n" . __( "Please check out your site now. It's possible that everything is working. If it says you need to update, you should do so:" );
+ $body .= "\n" . network_admin_url( 'update-core.php' );
+ break;
+ }
+
+ $critical_support = 'critical' === $type && ! empty( $core_update->support_email );
+ if ( $critical_support ) {
+ // Support offer if available.
+ $body .= "\n\n" . sprintf( __( "The WordPress team is willing to help you. Forward this email to %s and the team will work with you to make sure your site is working." ), $core_update->support_email );
+ } else {
+ // Add a note about the support forums.
+ $body .= "\n\n" . __( 'If you experience any issues or need support, the volunteers in the WordPress.org support forums may be able to help.' );
+ $body .= "\n" . __( 'https://wordpress.org/support/' );
+ }
+
+ // Updates are important!
+ if ( $type != 'success' || $newer_version_available ) {
+ $body .= "\n\n" . __( 'Keeping your site updated is important for security. It also makes the internet a safer place for you and your readers.' );
+ }
+
+ if ( $critical_support ) {
+ $body .= " " . __( "If you reach out to us, we'll also ensure you'll never have this problem again." );
+ }
+
+ // If things are successful and we're now on the latest, mention plugins and themes if any are out of date.
+ if ( $type == 'success' && ! $newer_version_available && ( get_plugin_updates() || get_theme_updates() ) ) {
+ $body .= "\n\n" . __( 'You also have some plugins or themes with updates available. Update them now:' );
+ $body .= "\n" . network_admin_url();
+ }
+
+ $body .= "\n\n" . __( 'The WordPress Team' ) . "\n";
+
+ if ( 'critical' == $type && is_wp_error( $result ) ) {
+ $body .= "\n***\n\n";
+ $body .= sprintf( __( 'Your site was running version %s.' ), $GLOBALS['wp_version'] );
+ $body .= ' ' . __( 'We have some data that describes the error your site encountered.' );
+ $body .= ' ' . __( 'Your hosting company, support forum volunteers, or a friendly developer may be able to use this information to help you:' );
+
+ // If we had a rollback and we're still critical, then the rollback failed too.
+ // Loop through all errors (the main WP_Error, the update result, the rollback result) for code, data, etc.
+ if ( 'rollback_was_required' == $result->get_error_code() )
+ $errors = array( $result, $result->get_error_data()->update, $result->get_error_data()->rollback );
+ else
+ $errors = array( $result );
+
+ foreach ( $errors as $error ) {
+ if ( ! is_wp_error( $error ) )
+ continue;
+ $error_code = $error->get_error_code();
+ $body .= "\n\n" . sprintf( __( "Error code: %s" ), $error_code );
+ if ( 'rollback_was_required' == $error_code )
+ continue;
+ if ( $error->get_error_message() )
+ $body .= "\n" . $error->get_error_message();
+ $error_data = $error->get_error_data();
+ if ( $error_data )
+ $body .= "\n" . implode( ', ', (array) $error_data );
+ }
+ $body .= "\n";
+ }
+
+ $to = get_site_option( 'admin_email' );
+ $headers = '';
+
+ $email = compact( 'to', 'subject', 'body', 'headers' );
+
+ /**
+ * Filter the email sent following an automatic background core update.
+ *
+ * @since 3.7.0
+ *
+ * @param array $email {
+ * Array of email arguments that will be passed to wp_mail().
+ *
+ * @type string $to The email recipient. An array of emails
+ * can be returned, as handled by wp_mail().
+ * @type string $subject The email's subject.
+ * @type string $body The email message body.
+ * @type string $headers Any email headers, defaults to no headers.
+ * }
+ * @param string $type The type of email being sent. Can be one of
+ * 'success', 'fail', 'manual', 'critical'.
+ * @param object $core_update The update offer that was attempted.
+ * @param mixed $result The result for the core update. Can be WP_Error.
+ */
+ $email = apply_filters( 'auto_core_update_email', $email, $type, $core_update, $result );
+
+ wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
+ }
+
+ /**
+ * Prepares and sends an email of a full log of background update results, useful for debugging and geekery.
+ *
+ * @since 3.7.0
+ * @access protected
+ */
+ protected function send_debug_email() {
+ $update_count = 0;
+ foreach ( $this->update_results as $type => $updates )
+ $update_count += count( $updates );
+
+ $body = array();
+ $failures = 0;
+
+ $body[] = sprintf( __( 'WordPress site: %s' ), network_home_url( '/' ) );
+
+ // Core
+ if ( isset( $this->update_results['core'] ) ) {
+ $result = $this->update_results['core'][0];
+ if ( $result->result && ! is_wp_error( $result->result ) ) {
+ $body[] = sprintf( __( 'SUCCESS: WordPress was successfully updated to %s' ), $result->name );
+ } else {
+ $body[] = sprintf( __( 'FAILED: WordPress failed to update to %s' ), $result->name );
+ $failures++;
+ }
+ $body[] = '';
+ }
+
+ // Plugins, Themes, Translations
+ foreach ( array( 'plugin', 'theme', 'translation' ) as $type ) {
+ if ( ! isset( $this->update_results[ $type ] ) )
+ continue;
+ $success_items = wp_list_filter( $this->update_results[ $type ], array( 'result' => true ) );
+ if ( $success_items ) {
+ $messages = array(
+ 'plugin' => __( 'The following plugins were successfully updated:' ),
+ 'theme' => __( 'The following themes were successfully updated:' ),
+ 'translation' => __( 'The following translations were successfully updated:' ),
+ );
+
+ $body[] = $messages[ $type ];
+ foreach ( wp_list_pluck( $success_items, 'name' ) as $name ) {
+ $body[] = ' * ' . sprintf( __( 'SUCCESS: %s' ), $name );
+ }
+ }
+ if ( $success_items != $this->update_results[ $type ] ) {
+ // Failed updates
+ $messages = array(
+ 'plugin' => __( 'The following plugins failed to update:' ),
+ 'theme' => __( 'The following themes failed to update:' ),
+ 'translation' => __( 'The following translations failed to update:' ),
+ );
+
+ $body[] = $messages[ $type ];
+ foreach ( $this->update_results[ $type ] as $item ) {
+ if ( ! $item->result || is_wp_error( $item->result ) ) {
+ $body[] = ' * ' . sprintf( __( 'FAILED: %s' ), $item->name );
+ $failures++;
+ }
+ }
+ }
+ $body[] = '';
+ }
+
+ $site_title = wp_specialchars_decode( get_bloginfo( 'name' ), ENT_QUOTES );
+ if ( $failures ) {
+ $body[] = trim( __(
+"BETA TESTING?
+=============
+
+This debugging email is sent when you are using a development version of WordPress.
+
+If you think these failures might be due to a bug in WordPress, could you report it?
+ * Open a thread in the support forums: https://wordpress.org/support/forum/alphabeta
+ * Or, if you're comfortable writing a bug report: https://core.trac.wordpress.org/
+
+Thanks! -- The WordPress Team" ) );
+ $body[] = '';
+
+ $subject = sprintf( __( '[%s] There were failures during background updates' ), $site_title );
+ } else {
+ $subject = sprintf( __( '[%s] Background updates have finished' ), $site_title );
+ }
+
+ $body[] = trim( __(
+'UPDATE LOG
+==========' ) );
+ $body[] = '';
+
+ foreach ( array( 'core', 'plugin', 'theme', 'translation' ) as $type ) {
+ if ( ! isset( $this->update_results[ $type ] ) )
+ continue;
+ foreach ( $this->update_results[ $type ] as $update ) {
+ $body[] = $update->name;
+ $body[] = str_repeat( '-', strlen( $update->name ) );
+ foreach ( $update->messages as $message )
+ $body[] = " " . html_entity_decode( str_replace( '…', '...', $message ) );
+ if ( is_wp_error( $update->result ) ) {
+ $results = array( 'update' => $update->result );
+ // If we rolled back, we want to know an error that occurred then too.
+ if ( 'rollback_was_required' === $update->result->get_error_code() )
+ $results = (array) $update->result->get_error_data();
+ foreach ( $results as $result_type => $result ) {
+ if ( ! is_wp_error( $result ) )
+ continue;
+
+ if ( 'rollback' === $result_type ) {
+ /* translators: 1: Error code, 2: Error message. */
+ $body[] = ' ' . sprintf( __( 'Rollback Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
+ } else {
+ /* translators: 1: Error code, 2: Error message. */
+ $body[] = ' ' . sprintf( __( 'Error: [%1$s] %2$s' ), $result->get_error_code(), $result->get_error_message() );
+ }
+
+ if ( $result->get_error_data() )
+ $body[] = ' ' . implode( ', ', (array) $result->get_error_data() );
+ }
+ }
+ $body[] = '';
+ }
+ }
+
+ $email = array(
+ 'to' => get_site_option( 'admin_email' ),
+ 'subject' => $subject,
+ 'body' => implode( "\n", $body ),
+ 'headers' => ''
+ );
+
+ /**
+ * Filter the debug email that can be sent following an automatic
+ * background core update.
+ *
+ * @since 3.8.0
+ *
+ * @param array $email {
+ * Array of email arguments that will be passed to wp_mail().
+ *
+ * @type string $to The email recipient. An array of emails
+ * can be returned, as handled by wp_mail().
+ * @type string $subject Email subject.
+ * @type string $body Email message body.
+ * @type string $headers Any email headers. Default empty.
+ * }
+ * @param int $failures The number of failures encountered while upgrading.
+ * @param mixed $results The results of all attempted updates.
+ */
+ $email = apply_filters( 'automatic_updates_debug_email', $email, $failures, $this->update_results );
+
+ wp_mail( $email['to'], wp_specialchars_decode( $email['subject'] ), $email['body'], $email['headers'] );
+ }
+}
diff --git a/wp-includes/version.php b/wp-includes/version.php
index a4c1ca12d7..4ca0edbd4e 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
-$wp_version = '4.6-alpha-37408';
+$wp_version = '4.6-alpha-37409';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.