Re: [PATCH] builtin/config.c: prefer `--type=bool` over `--bool`, etc.

[Junio C Hamano <gitster@pobox.com>]

Jeff King <peff@peff.net> writes:

> ... But actually, last-one-wins applies only
> to a _single_ option, not necessarily unrelated ones. Many other
> multi-action commands actually have a series of separate boolean flags,
> and then complain when more than one of the flags is set.
>
> So maybe it's not such a good idea for the actions (I do still think
> it's the right path for the types).

If this were using command verbs (e.g. "git config get foo.bar") as
opposed to command options (e.g. "git config --get foo.bar"), it
wouldn't ahve allowed multiple command verbs from the command line,
and last-one-wins would not have made much sense because there is no
way to trigger it as a desirable "feature".

Just like the topic of the discussion unifies --int/--bool/etc. into
a single --type={int,bool,...}, perhaps the existing command options
--get/--list/etc. can be taken as if they were a mistaken historical
way to spell --action={get,list,...}.  I of course am not recommending
to add a new "--action" option.  I am suggesting it as a thought-aid
to see if actions are all that different from value type options.

I agree that a-bit-per-type that is checked with HAS_MULTI_BITS()
for error at the end does not make much sense.  I also think what
you did in this patch for actions is a good clean-up for the above
reason.