KeyError or IndexError raised from click subcommand triggers 'Invalid/No subcommand' message.

[DropD]

in aiida/cmdline/baseclass.py:131:

try:
  the_class = self.routed_subcommands[args[0]]  # the click.Group of the subcommand
  ...
  function_to_call = the_class().run  # calls the group's __call__, which calls it's main()
  ## This is not what is intended. For this type of command we want
  ## function_to_call = the_class
  ## Actually, the .run would lead to an AttributeError, except that click commands terminate 
  ## with sys.exit() or raise an exception before execution gets there
  except IndexError:
    function_to_call = self.no_subcommand  # Gotcha!
    ## If the click subcommand's main() raises an IndexError
  except AttributeError:
    function_to_call = self.invalid_subcommand  # Gotcha!
    ## ditto for AttributeError
  function_to_call(*args[1:])
  ## This will print "<subcmd> is an invalid subcommand ..." 
  ## and then list <subcmd> as a valid subcommand

[sphuber]

Fixed in #1795