site list: check for multisite before doing anything

diff --git a/php/commands/site.php b/php/commands/site.php
index c87fc63..4f38778 100644 (file)
--- a/php/commands/site.php
+++ b/php/commands/site.php
@@ -338,6 +338,10 @@ class Site_Command extends WP_CLI_Command {
         * @synopsis [--format=<format>] [--fields=<fields>]
         */
        function _list( $_, $assoc_args ) {
+               if ( !is_multisite() ) {
+                       WP_CLI::error( 'This is not a multisite install.' );
+               }
+
                global $wpdb;
 
                $defaults = array(