Re: [Emacs-diffs] trunk r116999: Provide function for asking vc about project root

[Stefan Monnier]

>>> +        (condition-case err
>>> +            (vc-call-backend backend 'root default-directory)
>>> +          (vc-not-supported
>>> +           (unless (eq (cadr err) 'root)
>>> +             (signal (car err) (cdr err)))
>>> +           nil)))))
>> Why do we need this gymnastics?
> So that we don't accidentally suppress errors we *don't* expect to get.

No: I see the hypothetical reason, but I was wondering about
a practical reason.  IOW, I think this is overkill.  Note that the cost
is not only in code complexity but catching&re-raising signals also
defeats the backtraces in debug-on-error, which can be a pain.

I even wonder if we should allow `root' to fail.  E.g. RCS/CVS could
just walk up the directories until there's no RCS/CVS subdir.


        Stefan