Hi Junio,

On Tue, 6 Mar 2018, Junio C Hamano wrote:

> Johannes Schindelin <johannes.schinde...@gmx.de> writes:
> >> I don't think its possible to guess the semantics of the original merge
> >> as users can use custom merge strategies and amend the result. It would
> >> be possible to detect and unamended '-s ours' merge but special casing
> >> that may end up causing users more confusion rather than helping them.
> >
> > FWIW I agree.
> I think it is a mistake to sacrifice predictability only to add
> cleverness that sometimes work.  Elsewhere in the thread, I think I
> saw an argument to treat interactive and non-interactive something
> very different, but there is no fundamental difference between them
> (it is far easier with interactive to force the command to "port"
> each change to a vastly different context) so having consistent
> behaviour between the two cases is important, too.

I could be swayed both ways, but Buga already pointed out that we do not
have to compromise any consistency, simply by adding some syntactic sugar
to the `merge` command so that the different behavior is *explicit*.

> > My original plan was to always merge recursively and suggest to use `exec`
> > commands if anything else is needed.
> >
> > But now with that excellent new idea to perform successive three-way
> > merges of the original merge commit with the new tips, using the old tips
> > as merge base, I am considering to change that.
> OK, does this mean we want to wait before merging the "recreate
> merge" topic down to 'next'?  For more than a few weeks, it has been
> slated for 'next'.

Maybe a few more days.

My current thinking is to rework the handling of -c vs -C and *not* have
two different todo_command enum values, but rather introduce an unsigned
integer that has flags such as TODO_MERGE_EDIT.

And for this new behavior, we could introduce a new flag
(TODO_MERGE_REBASE_MERGE_COMMIT or something less unwieldy) and set that
flag via

        merge -R -C <commit> <merge>...

(i.e. via a new flag `-R`).

I want to discuss this in the other subthread, though.


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