Re: stash-p broken?

[Jeff King <peff@peff.net>]

On Tue, Jul 29, 2014 at 10:00:22AM -0700, Junio C Hamano wrote:

> Jeff King <peff@peff.net> writes:
> 
> > So perhaps we could do something better on the viewing side, and
> > "simplify" combined merges for files with all-identical parents.
> 
> Or you can ask to show the difference with the first parent, no?

Yeah, though there is no way to do the other thing (--second-parent to
show only the index side). I doubt anybody wants that, though. Just
passing --first-parent would probably be fine (that would match "git
stash show", too, though like that "stash show" it is impossible to
override to see the index portion then).

But...

> I do not think giving a single-parent diff when --cc/-c is asked
> for, which is a clear indication that the caller is aware that the
> commit in question is a merge, is such a good idea.

I think that is my point, though. The user is _not_ aware that the
commit in question is a merge. They stashed some stuff, and now they
want to see the result. I'd like to show them a vanilla commit if the
index is irrelevant, and otherwise show them something more interesting.

I definitely don't think that should be the default behavior, but I
don't see a problem with it being part of stash. We pick apart the stash
already in git-stash.sh, so for "git stash show" we can do it ourselves.
But during a traversal, we need support from "git log", since the answer
is different for each stash (and even for each path).

-Peff