From: "Roland Jäger" <eyenseo@mailbox.org>
To: Junio C Hamano <gitster@pobox.com>, usbuser@mailbox.org
Cc: git@vger.kernel.org
Subject: Re: Unexpected or wrong ff, no-ff and ff-only behaviour
Date: Tue, 9 Jul 2019 18:15:27 +0200 (CEST) [thread overview]
Message-ID: <1152121968.7459.1562688927235@office.mailbox.org> (raw)
In-Reply-To: <xmqqa7dnw9b1.fsf@gitster-ct.c.googlers.com>
Thanks for answering Junio.
I get what git does. But I believe that either the documentation ist wrong/ambiguous or --no-ff and --ff-only should be able to be combined and either should be fixed - preferably the later. What I want to say to git is "I never accept a real merge; please make a merge commit, even if it is redundant/empty". And I believe that github and gitlab allow to configure something like that.
My manpage tells me the following:
--ff When the merge resolves as a fast-forward, only update the branch pointer, without creating a merge commit. This is the default behavior.
=> Allow either
--no-ff Create a merge commit even when the merge resolves as a fast-forward. This is the default behaviour when merging an annotated (and possibly signed) tag that is not stored in its natural place in refs/tags/ hierarchy.
=> Always create a commit, even when FF
--ff-only Refuse to merge and exit with a non-zero status unless the current HEAD is already up to date or the merge can be resolved as a fast-forward.
=> Fail if FF is not possible
man page:
On 9 July 2019 16:51:14 CEST, Junio C Hamano <gitster@pobox.com> wrote:> usbuser@mailbox.org writes:
>
> > I'm rather confused about --ff, --no-ff and --ff-only. They seam
> >
> > to be all mutual exclusive...
> A clean result left by "git merge" can be either a fast-forward, or
> a real merge (i.e. 2 possible outcomes).
>
> The --ff option lets you say "If the other history I am attempting
> to merge is a descendant of the current commit, not creating a real
> merge and instead fast-forwarding is permitted". As this is the
> default, case you actually type --ff on the command line is rather
> limited (e.g. to countermand an earlier --no-ff on the command
> line).
>
> The --no-ff option lets you say "I never accept a fast-forward as
> the result; please make a real merge instead, even if it is
> redundant".
>
> The --ff-only option lets you say "I never accept a real merge as
> the result; please fail if this does not fast-forward".
>
> So, the only "real" options are between --[no-]ff (which allows or
> disallows one of the two possible outcomes, which is "fast-forward")
> and [--ff-only] (which allows or disallows the other one of the two
> possible outcomes, which is "real merge").
next prev parent reply other threads:[~2019-07-09 16:15 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-09 9:42 Unexpected or wrong ff, no-ff and ff-only behaviour usbuser
2019-07-09 14:51 ` Junio C Hamano
2019-07-09 16:15 ` Roland Jäger [this message]
2019-07-09 16:35 ` Elijah Newren
2019-07-09 17:00 ` usbuser
2019-07-09 20:33 ` Elijah Newren
2019-07-09 20:51 ` Bryan Turner
2019-07-10 7:49 ` usbuser
2019-07-10 16:34 ` Junio C Hamano
2019-07-11 5:13 ` Sergey Organov
2019-07-11 17:03 ` Junio C Hamano
2019-07-12 13:50 ` Sergey Organov
2019-07-12 16:24 ` Elijah Newren
2019-07-15 12:08 ` Sergey Organov
2019-07-12 18:33 ` Junio C Hamano
2019-07-15 12:47 ` Sergey Organov
2019-07-15 16:57 ` Junio C Hamano
2019-07-19 11:00 ` Sergey Organov
2019-07-11 15:46 ` brian m. carlson
2019-07-10 14:36 ` Sergey Organov
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