Re: Bring together merge and rebase

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On Tue, 2017-12-26 at 12:44 -0700, Carl Baldwin wrote:
> > Sure, it could be opt in, be a new format etc. But you haven't
> > explained why you think a feature like this would need to rely on
> > an entirely new parent structure and side-DAG, as opposed to just
> > the more minor changes I'm pointing out above, and which I think
> > will give you what you need from a UX level.
> 
> I have not wrapped my head around it enough to convince myself that
> it gives what I'm after. Let me spend a little more time with it to
> get a feel for it.

As someone working in an environment where we do a lot of rebasing and
very little merging, I read these proposals with interest.  I'm not
convinced that we would switch to using a "replaces"-type feature, but
I'm pretty sure that the "null-merge and rebase" trick described
previously would not be something we're interested in using.

Although "git log" doesn't follow these merges (unless requested), all
the graphical tools that are used to display history WOULD show all
those branches.  In a "replaces"-type environment I think the point is
that we would not want to see them (certainly not by default) as they
would be used mainly for deeper spelunking, but since they just seem
like normal merges I don't see any way to turn them off.

If "replaces" was a separate capability then it could be treated
differently by history browsing tools, and shown or not shown as
desired.  For example, a commit that had a "replaces" element could be
selected somehow and you could expand that set of commits that were
replaced, or something like that.



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