Re: [PATCH 3/3] verify-commit: scriptable commit signature verification

[Michael J Gruber <git@drmicha.warpmail.net>]

Jeff King venit, vidit, dixit 16.06.2014 22:39:
> On Mon, Jun 16, 2014 at 01:34:20PM -0700, Junio C Hamano wrote:
> 
>>> Your middle example above did make me think of one other thing, though.
>>> As you noted, we actually have _three_ signature types:
>>>
>>>   1. signed tags
>>>
>>>   2. signed commits
>>>
>>>   3. merges with embedded mergetag headers
>>>
>>> We already have a tool for (1). Michael is adding a tool for (2). How
>>> would one check (3) in a similar way?
>>
>> Hmph, somehow I misread the patch that it was for both 2 & 3 X-<.
> 
> I was just assuming it handles only (2) without checking further, so I
> may be wrong. But I do not think it makes sense to conflate (2) and (3).
> A merge commit may have both, and they are separate signatures.
> 
> For that matter, is there a way to expose (3) currently, besides via
> --show-signature? It does not trigger "%GG" and friends (nor should it).
> It may make sense to add extra format specifiers for mergetag
> signatures. Though I do not use them myself, so I am not clear on what
> the use case is besides a manual, human verification of a particular
> merge.

I'm afraid I'm on a weekly git schedule at best, sorry. Just trying to
catch up on this:

Admittedly, I simply don't know about "3.". I know only 1. and 2. (and
don't remember why they are implemented differently).

Are they documented/decribed somewhere?

Meanwhile, I'm rebasing on top of the %G related patches by Junio and
Jeff and hope to send out a v4 later today.

Michael