Re: vc with svn and git

[Michael Albinus <michael.albinus@gmx.de>]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

>>> I think there's a caching layer going on -- that appears to be what
>>> this block is about:
>>>
>>> ((and (boundp 'file-name-handler-alist)
>>> (setq handler (find-file-name-handler file 'vc-registered)))
>>> ;; handler should set vc-backend and return t if registered
>>> (funcall handler 'vc-registered file))
>
> This is not a cache.  It's a hook that was meant (I think) to support VC
> on remote file names (or maybe even within tarballs).  I don't know that
> it's ever been used (then again, I'm biased because I never liked this
> hook, so don't take my word for it).

I don't know the situation with tarballs, but for Tramp it is
implemented and useful. Tramp's implementation uses some caching indeed
for performance improvement. See the comment in tramp-sh.el, heading
`tramp-sh-handle-vc-registered'.

>         Stefan

Best regards, Michael.