# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1639038710 -7200
# Node ID 0849d65fabce8f1e6493976bd8ac35ad6d78c7c0
# Parent  8481f8f52a84956a8c00aeef666fc7b60e57dd26
More work on improving help.

diff -r 8481f8f52a84 -r 0849d65fabce lxmldump.py
--- a/lxmldump.py	Thu Dec 09 10:11:26 2021 +0200
+++ b/lxmldump.py	Thu Dec 09 10:31:50 2021 +0200
@@ -487,7 +487,6 @@
         print(u"\nAvailable output modes:")
         print("  " + ", ".join(pkk_modes_list.values()))
 
-
     def error(self, message):
         self.print_help()
         sys.stderr.write(f"\nerror: {message}\n")
@@ -500,7 +499,7 @@
         )
 
     optparser.add_argument("filenames",
-        type=str, action="extend", nargs="+",
+        type=str, action="extend", nargs="*",
         metavar="filename",
         help="XML filename(s)")
 
@@ -555,16 +554,24 @@
     pkk_cfg = optparser.parse_args()
 
     if pkk_cfg.list_values:
+        print(u"\nAvailable output modes:")
+        print("  " + ", ".join(pkk_modes_list.values()))
+
         if pkk_cfg.mode not in [PKK_MODE_NORMAL, PKK_MODE_ANKI]:
             pkk_cfg.mode = PKK_MODE_NORMAL
 
-        print(u"Available format strings and values (mode '{}'):".format(
+        print(u"\nAvailable format strings and values (mode '{}'):".format(
             pkk_modes_list[pkk_cfg.mode]))
 
         for mid in pkk_mode_defaults:
             stmp = pkk_get_value(mid).replace("\\", "\\\\").replace("\n", "\\n")
             print(u"  {:22s} : '{}'".format(mid, stmp))
 
+        sys.exit(0)
+
+    elif len(pkk_cfg.filenames) == 0:
+        optparser.print_help()
+
     ### Handle each input file
     for filename in pkk_cfg.filenames:
         # Parse XML file into element tree