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From: Junio C Hamano <>
To: Stefan Beller <>
Subject: Re: [PATCH 3/3] Inform about fast-forwarding of submodules during merge
Date: Wed, 16 May 2018 10:36:55 +0900
Message-ID: <> (raw)
In-Reply-To: <>

Stefan Beller <> writes:

> From: Leif Middelschulte <>

Subject: merge-recursive: give notice when submodule commit gets fast-forwarded


>  	/* Case #1: a is contained in b or vice versa */
>  	if (in_merge_bases(commit_a, commit_b)) {
>  		oidcpy(result, b);
> +		if (show(o, 3)) {
> +			output(o, 1, _("Fast-forwarding submodule %s to the following commit:"), path);
> +			output_commit_title(o, commit_b);
> +		} else if (show(o, 2))
> +			output(o, 2, _("Fast-forwarding submodule %s to %s"), path, oid_to_hex(b));
> +		else
> +			; /* no output */
> +

	Controls the amount of output shown by the recursive merge
	strategy.  Level 0 outputs nothing except a final error
	message if conflicts were detected. Level 1 outputs only
	conflicts, 2 outputs conflicts and file changes.  Level 5 and
	above outputs debugging information.  The default is level 2.
	Can be overridden by the `GIT_MERGE_VERBOSITY` environment variable.

So, by default, we report the fact that we update submodule to a
particular commit, which is quite similar to how we report auto
merged paths using the content level 3-way merge; when you squint
your eyes, the "fast-forward" of submodules look somewhat like a
content-level 3-way merge anyway ;-)

And at level 3, which currently is used to report a non-event that
does not change the result of the merge from what was naturally
expected, we give a bit more detail by citing the commit the
submodule gets fast-forwarded to [*1*].

Sort of makes sense.


*1* I wonder if that is really necessary, though---we do not give
"here is a diff" or "this is the new contents" after a path gets
merged for normal files.  And if it is needed perhaps because
submodules are so special, I wonder if we also need to give the
commit the submodule gets fast-forwarded from, i.e. the original
one, the same way.

  parent reply index

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-15 20:00 [PATCHv2 0/3] Reroll of sb/submodule-merge-in-merge-recursive Stefan Beller
2018-05-15 20:00 ` [PATCH] try harder to fetch a submodule Stefan Beller
2018-05-15 20:00 ` [PATCH] grep: handle corrupt index files early Stefan Beller
2018-05-15 20:00 ` [PATCH 1/3] submodule.c: move submodule merging to merge-recursive.c Stefan Beller
2018-05-15 20:00 ` [PATCH 2/3] merge-recursive: i18n submodule merge output and respect verbosity Stefan Beller
2018-05-16  1:17   ` Junio C Hamano
2018-05-15 20:00 ` [PATCH 3/3] Inform about fast-forwarding of submodules during merge Stefan Beller
2018-05-16  1:36   ` Elijah Newren
2018-05-16  1:36   ` Junio C Hamano [this message]
2018-05-16  1:42   ` Junio C Hamano
2018-06-04 18:48     ` [PATCH v4 0/1] merge-recursive: give notice when submodule commit gets fast-forwarded Leif Middelschulte
2018-06-04 18:48       ` [PATCH 1/1] " Leif Middelschulte
2018-06-07  5:22         ` Elijah Newren
2018-06-11 17:31           ` [PATCH] merge-submodule: reduce output verbosity Leif Middelschulte
2018-06-11 18:04             ` Junio C Hamano
2018-06-11 19:07               ` Leif Middelschulte
2018-05-15 20:02 ` [PATCHv2 0/3] Reroll of sb/submodule-merge-in-merge-recursive Stefan Beller
2018-05-15 20:15 ` Leif Middelschulte
2018-05-15 20:49   ` Stefan Beller

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