Re: [PATCH v11] checkout: extend --track with a "fetch" mode to refresh start-point

[Junio C Hamano <gitster@pobox.com>]

Phillip Wood <phillip.wood123@gmail.com> writes:

>> One.  Have you considered the case where the remote-tracking refs
>> are overlapping, e.g., where "origin" and "upstream" point at
>> different URLs but they both store in "refs/remotes/upstream/*"?
>> Perhaps their URLs may textually be different but are pointing
>> logically at the same place (e.g., one ssh:// the other https:// for
>> example).
>> 
>> What should happen?  What does happen after you apply this patch?
>
> It would be worth looking at what "git checkout --track" does in that 
> case and seeing if we can share the code.

It always is a good idea to think how we can share code for
different purposes to solve a new problem, but in this particular
one, I am not sure if "git checkout -t -b topic upstream/main"
codepath has much to offer to solve what the new "before the
checkout, update from the remote" feature wants to do.  To the
former, it does not matter how refs/remotes/upstream/* are updated
and by fetching which remote at all.  The only thing it cares about
is to leave the record that this new "topic" branch works with
refs/remotes/upstrea/main.  But the latter needs to be able to
compute which remote it should fetch from.  It is a problem that
existing code had no need to solve.