# HG changeset patch
# User Ludovic Chabant <ludovic@chabant.com>
# Date 1437350457 25200
# Node ID c5df200354e837c2c5550100a2c0f5b0ad56855f
# Parent  750160edefb7a24cf7869ef312ad48b68f91f41d
themes: Fix crash when invoking command with no sub-command.

diff -r 750160edefb7 -r c5df200354e8 piecrust/commands/builtin/themes.py
--- a/piecrust/commands/builtin/themes.py	Wed Jul 15 00:00:33 2015 -0700
+++ b/piecrust/commands/builtin/themes.py	Sun Jul 19 17:00:57 2015 -0700
@@ -41,6 +41,9 @@
         p.set_defaults(sub_func=self._overrideTheme)
 
     def checkedRun(self, ctx):
+        if not hasattr(ctx.args, 'sub_func'):
+            ctx.parser.parse_args(['themes', '--help'])
+            return
         ctx.args.sub_func(ctx)
 
     def _createTheme(self, ctx):