-C throws KeyError if handed an invalid command

[Paul Jimenez]

'vellum -C foobies' throws KeyError and traces back.

This gives an error instead, but should probably give a better error message (listing available commands maybe?):

=== modified file 'vellum/bin.py'
--- vellum/bin.py 2008-04-29 06:49:09 +0000
+++ vellum/bin.py 2009-03-23 05:32:55 +0000
@@ -88,8 +88,11 @@
     """
     to_search = args or script.commands.keys()
     for cmd in to_search:
- func = script.commands[cmd]
- doc = func.__doc__ if func.__doc__ else "\n Undocumented"
+ if cmd in script.commands:
+ func = script.commands[cmd]
+ doc = func.__doc__ if func.__doc__ else "\n Undocumented"
+ else:
+ doc = "\n Invalid command"
         print "%s:%s" % (cmd, doc)

 def shell(options, script, user_input=raw_input):