Ticket #28571: 28571.diff

src/wp-admin/includes/class-wp-upgrader.php

@@ -1196 +1196 @@
 
         public static function async_upgrade( $upgrader = false ) {
                 // Avoid recursion.
-                if ( $upgrader && $upgrader instanceof Language_Pack_Upgrader )
+                if ( $upgrader && $upgrader instanceof Language_Pack_Upgrader ) {
                         return;
+                }
 
                 // Nothing to do?
                 $language_updates = wp_get_translation_updates();
-                if ( ! $language_updates )
+                if ( ! $language_updates ) {
                         return;
+                }
 
+                // Avoid messing with VCS installs, at least for now.
+                // Noted: this is not the ideal way to accomplish this.
+                $check_vcs = new WP_Automatic_Updater;
+                if ( $check_vcs->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;
+                }
+
                 $skin = new Language_Pack_Upgrader_Skin( array(
                         'skip_header_footer' => true,
                 ) );
 
                 $lp_upgrader = new Language_Pack_Upgrader( $skin );
-                $lp_upgrader->upgrade();
+                $lp_upgrader->bulk_upgrade( $language_updates );
         }
 
         public function upgrade_strings() {