Command plugins with sub commands

[shaunduncan]

A lot of times a single command plugin actually responds to several sub commands. Right now it's kind of a pain to deal with this, because it means you have to physically check first value of args. For example:

@command('foo')
def foo(client, channel, nick, message, cmd, args):
    if args[0] == 'bar':
        # Do the "helga foo bar" sub command
    elif args[0] == 'baz':
        # Do the "helga foo baz" sub command

[shaunduncan]

A thought on how this should work. Based on this example:

@command('foo')
def foo(client, channel, nick, message, cmd, args):
    if args[0] == 'bar':
        # Do the "helga foo bar" sub command
    elif args[0] == 'baz':
        # Do the "helga foo baz" sub command

This might work:

@command('abc')
@command('foo')
def foo_cmd(client, channel, nick, message, cmd, args):
    # This is run if no sub command match

@foo_cmd.foo.subcommand('bar')
def bar(client, channel, nick, message, cmd, args):
    # this would run on 'helga foo bar'

@foo_cmd.abc.subcommand('xyz')
def xyz(client, channel, nick, message, cmd, args):
    # this would run on 'helga abc xyz'

Or this:

@command('abc')
@command('foo')
def foo_cmd(client, channel, nick, message, cmd, args):
    # This is run if no sub command match

@foo_cmd.foo.bar
def bar(client, channel, nick, message, cmd, args):
    # this would run on 'helga foo bar'

@foo_cmd.abc.xyz
def xyz(client, channel, nick, message, cmd, args):
    # this would run on 'helga abc xyz'

I'm not sure if it should only be a single level of sub commands, or if unlimited levels should be supported.