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From: Elijah Newren <newren@gmail.com>
To: Jonathan Nieder <jrnieder@gmail.com>
Cc: Junio C Hamano <gitster@pobox.com>, Git Mailing List <git@vger.kernel.org>
Subject: Re: Opinions on changing add/add conflict resolution?
Date: Tue, 13 Mar 2018 16:14:03 -0700
Message-ID: <CABPp-BE=D_TgjLZkhRh6-7k3UpnDDMfZB6vE=FMdwFT+mmp_tw@mail.gmail.com> (raw)
In-Reply-To: <20180313225639.GC147135@aiede.svl.corp.google.com>

On Tue, Mar 13, 2018 at 3:56 PM, Jonathan Nieder <jrnieder@gmail.com> wrote:
> Elijah Newren wrote:
>
>> However, my question here about what to write to the working tree for
>> a rename/rename(2to1) conflict in one particular corner case still
>> remains.  Should a two-way merge be performed even if it may result in
>> nested sets of conflict markers, or is that a sufficiently bad outcome
>> for the user that it's the one case we do want to write colliding
>> files out to different temporary paths?
>
> Nested conflict markers only happen in the conflictstyle=diff3 case, I
> would think.

Currently, yes.  To be clear, though, this change would make it
possible even when there is no recursive merge being done and when
conflictstyle=merge.

> merge-recursive writes them already.  I've often wished that it would
> use a union merge strategy when building the common ancestor to avoid
> the nested conflicts that rerere doesn't understand.  But anyway,
> that's an orthogonal issue: in the rename/rename context, it should be
> fine to write nested conflict markers since that's consistent with
> what merge-recursive already does.

Cool, sounds like we're now all on the same page.

Someone in the future might hate us if they use conflictstyle=diff3,
and have a recursive merge, and have a rename/rename(2to1) conflict in
the virtual merge base with nested conflicts, and that resulting file
is also involved in a separate rename/rename(2to1) conflict in the
outer merge that has its own nested conflicts; we'd have up to four
levels of nested conflicts.  But for now, I'm going to write that off
as a crazy thought (or dismiss it as nigh impossible to reason about
regardless of what we did to help them) and just proceed ahead.  :-)

  reply index

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-03-12 18:32 Elijah Newren
2018-03-12 18:47 ` Jonathan Nieder
2018-03-12 21:26   ` Elijah Newren
2018-03-12 21:35     ` Jonathan Nieder
2018-03-12 23:08       ` Hilco Wijbenga
2018-03-12 23:14         ` Jonathan Nieder
2018-03-13  0:38       ` Elijah Newren
2018-03-13 17:22         ` Elijah Newren
2018-03-13  5:30     ` Junio C Hamano
2018-03-13 18:21       ` Elijah Newren
2018-03-13 22:26         ` Junio C Hamano
2018-03-13 22:42           ` Elijah Newren
2018-03-13 22:52             ` Junio C Hamano
2018-03-13 23:04               ` Elijah Newren
2018-03-13 22:56             ` Jonathan Nieder
2018-03-13 23:14               ` Elijah Newren [this message]
2018-03-13 23:30                 ` Junio C Hamano
2018-03-12 22:19 ` Ævar Arnfjörð Bjarmason
     [not found]   ` <CABPp-BHDOimDoLxWxS=BDOBkm6CUTrXTzD16=TSkWGN-HOiU2g@mail.gmail.com>
2018-03-13  2:53     ` Fwd: " Elijah Newren
2018-03-13 22:12       ` Junio C Hamano
2018-03-13  9:59     ` Ævar Arnfjörð Bjarmason
2018-03-13 17:09       ` Elijah Newren

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