Merge pull request #26566 from cachedout/warn_on_masterless_publish

Don't stacktrace trying to publish without a master

salt/modules/publish.py

@@ -66,6 +66,9 @@ def _publish(
 
         salt system.example.com publish.publish '*' cmd.run 'ls -la /tmp'
     '''
+    if 'master_uri' not in __opts__:
+        log.error('Cannot run publish commands without a connection to a salt master. No command sent.')
+        return {}
     if fun.startswith('publish.'):
         log.info('Cannot publish publish calls. Returning {}')
         return {}