From: Andreas Hennings <andreas@dqxtech.net>
Date: Tue, 08 Jan 2019 18:13:31 GMT
Subject: Re: Feature request: --preserve-merges to add "exec git merge ..." instead of "pick ..."
Message-ID: <CAH0Uv3F4q0oPG2O58eTV5n+5eZcxHK9acGMX+4F4LTm1JATfhg@mail.gmail.com>
In-Reply-To: <CAH0Uv3FRq0JiXWx9Ow1EhKrYB4OTM-9Fpox7FvZ3tC6J6toEsw@mail.gmail.com>

I tried this option after upgrading my git.
Unfortunately, no matter which variation I use, it still attempts to
rebase most or all of the feature branches before merging them.
Possibly depending on their ancestry.


On Mon, 7 Jan 2019 at 22:12, Andreas Hennings <andreas@dqxtech.net> wrote:
>
> It sounds good!
> I was using git version 2.7.4 all the time. I should have checked
> before posting here :)
> Now trying 2.20.1
>
> From "git help rebase":
>
>            By default, or when no-rebase-cousins was specified,
> commits which do not have <upstream> as direct ancestor will keep
> their
>            original branch point, i.e. commits that would be excluded
> by gitlink:git-log[1]'s --ancestry-path option will keep their
>            original ancestry by default. If the rebase-cousins mode is
> turned on, such commits are instead rebased onto <upstream> (or
>            <onto>, if specified).
>
> I am not sure if this criterion (which ancestors it has) will always
> produce the behavior I am looking for.
> I will have to experiment a bit.
>
> Thanks for now, I will post again with new thoughts once I have done
> some experiments.
>
> On Mon, 7 Jan 2019 at 17:42, Junio C Hamano <gitster@pobox.com> wrote:
> >
> > Andreas Hennings <andreas@dqxtech.net> writes:
> >
> > > This means we need a rebase operation where:
> > > - The commits of the acceptance branch itself are being replaced.
> > > - The commits of the feature branches remain as they are.
> > >
> > > A "git rebase --preserve-merges" almost does this, but not really.
> >
> > This wished-for feature sounds to me more like the "first-parent"
> > mode that has been discussed a few times in the past but never
> > materialized.
> >
> > The preserve-merges mode is getting abandoned by the original author
> > as unsalvageable.  Have you tried the rebase-merges mode?  That may
> > let you choose replaying only the merge commits on the acceptance
> > branch without touching the tips of the feature branches getting
> > merged.