[scripts][cylc] Fix no argument handling for message command

cylc · Dec 1, 2019 · 7a52b8e · 7a52b8e
1 parent 121338c
commit 7a52b8e
Showing 1 changed file with 6 additions and 5 deletions.
diff --git a/cylc/flow/scripts/cylc.py b/cylc/flow/scripts/cylc.py
@@ -146,11 +146,12 @@ def main(cmd_args, version, help_):
                             cmd_args.insert(cmd_args.index(arg) + 1, "--")
                             break
             elif cylc_cmd.endswith("message"):
-                if cmd_args[0] in ['-s', '--severity', '-p', '--priority']:
-                    dd_index = 2
-                else:
-                    dd_index = 0
-                cmd_args.insert(dd_index, "--")
+                if cmd_args:
+                    if cmd_args[0] in ['-s', '--severity', '-p', '--priority']:
+                        dd_index = 2
+                    else:
+                        dd_index = 0
+                    cmd_args.insert(dd_index, "--")
 
             if help_:
                 execute_cmd(cylc_cmd, "--help")