Re: [PATCH] submodule merge support

[Martin Waitz <tali@admingilde.org>]

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hoi :)

On Sun, May 06, 2007 at 03:18:53PM -0700, Linus Torvalds wrote:
> On Mon, 7 May 2007, Alex Riesen wrote:
> > merge-recursive is a mess already, you just made even more so.
> > Besides, you completely forgot all other merge strategies.
> > 
> > How about making all existing strategies just ignore submodules, and
> > move recursive merge in the merge driver (git-merge.sh)?
> 
> Yes, I think that's the right thing to do.
> 
> I think it's the right thing for another reason: in a true "recursive" 
> merge, the submodules shouldn't be recursively merged anyway. *THEIR* 
> merge will have its own history, and doing it based on some random history 
> of the superproject is actually wrong anyway!

Of course the submodule has to get its own history, it's not possible
to do otherwise.  But you have to trigger the submodule merge when you
find a submodule-level conflict in the supermodule merge, just as
you trigger file-level three-way merges, too.
This is really all which my patch does -- it starts a new instance of
the merge driver which only merges the submodule commit from the other
supermodule tree.
So it's not recursive in the merge-recursive way, but in a
call-git-merge-again way.

The comment about merge-recursive not being the best place is correct of
course.

-- 
Martin Waitz

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