bug#50572: 28.0.50; [PATCH] fix VC to find the responsible backend with the most specific path.

[Manuel Giraud]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Manuel Giraud <manuel@ledu-giraud.fr>
>> Cc: 50572@debbugs.gnu.org
>> Date: Tue, 14 Sep 2021 09:50:22 +0200
>> 
>> > Isn't that already available with "C-u C-x v v"?
>> 
>> It does not work for me. It still tries to register in my homedir
>> subversion.
>
> It didn't work for me, either.  Which is a pity, since the manual says
> it should.  I guess we lost this at some point; patches to fix that
> are welcome.

Ok. I could try to work on this issue then but maybe I should file
another bug report, no?

>> FWIW, I think the most specific should be the default of
>> "C-x v v"
>
> I'm worried that we are arbitrarily changing the defaults, for the
> sole reason that the new default plays better with someone's
> workflows.

I think you are right and as you said the "choose the correct backend"
behaviour is already documented in the manual (in "Advanced Control in
‘C-x v v’").

> AFAIR, it used to be the case that the order of VCS names in
> vc-handled-backends determined the way the default is sought out and
> set.  This change (and I think the other one Dmitry mentioned in his
> response?) change that in a way that doesn't leave any "fire escape"
> to users who might be setting things up to have a meaningful (for
> them) order in that list.

Yes, in "Customizing VC", the manual insists on the order importance of
the vc-handled-backends list. So maybe, just fixing "C-u C-x v v" and
remember this customization is enough here.
-- 
Manuel Giraud