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

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

"Harald Nordgren via GitGitGadget" <gitgitgadget@gmail.com> writes:

>     checkout: --track=fetch
>     
>      * Find the right remote by checking which remote's fetch refspec maps
>        to the user's start-point, instead of assuming the start-point begins
>        with the remote's name. This fixes cases where the user has a custom
>        refspec mapping into a namespace whose name differs from the remote
>        (e.g. fetching from origin into refs/remotes/upstream/*).

This comment is even before looking at the patch text.  After
getting one issue pointed out, I'd expect you to think about related
issues before sending a new round out.

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?

>      * For a bare namespace name, follow <namespace>/HEAD first to figure
>        out which branch to fetch.

What should happen if HEAD does not exist?  What does happen after
you apply this patch?

Thanks.