Re: [PATCH v5 03/10] transport-helper: add 'force' to 'export' helpers

> On Thu, Oct 31, 2013 at 12:21 PM, Junio C Hamano <gitster@pobox.com> wrote:
>> Felipe Contreras <felipe.contreras@gmail.com> writes:
>>
>>> Otherwise they cannot know when to force the push or not (other than
>>> hacks).
>>> ...
>>> diff --git a/transport-helper.c b/transport-helper.c
>>> index d05fc7c..ed238e5 100644
>>> --- a/transport-helper.c
>>> +++ b/transport-helper.c
>>> @@ -854,6 +854,11 @@ static int push_refs_with_export(struct transport *transport,
>>>                       die("helper %s does not support dry-run", data->name);
>>>       }
>>>
>>> +     if (flags & TRANSPORT_PUSH_FORCE) {
>>> +             if (set_helper_option(transport, "force", "true") != 0)
>>> +                     die("helper %s does not support 'force'", data->name);
>>> +     }
>>> +
>>
>> Does this cause a "git push --force $there A:B" to fail when $there
>> is a destination that goes via an existing helper does not suport
>> "force" option?
>
> Yes.
>
>> Should it fail even when the current value of B is an ancestor of A
>> (i.e. when an unforced push would succeed)?
>
> It might make sense to fail only when the push is non-fast-forward,
> but it's not so straight-forward to implement.