GNU bug report logs - #11757
24.1.50; vc-git calls `process-file' too many times

Previous Next

Full log

View this message in rfc822 format

From: Michael Albinus <michael.albinus <at> gmx.de>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 11757 <at> debbugs.gnu.org
Subject: bug#11757: Acknowledgement (24.1.50; vc-git calls `process-file' too many times)
Date: Sun, 01 Jul 2012 11:58:28 +0200

Dmitry Gutov <dgutov <at> yandex.ru> writes:

>>> I'm not sure what we should do. Call (vc-mode-line) anyway? That would work.
>>
>> Nope. This is expansive, because it recomputes `vc-working-revision'. We
>> would loose all improvements from using the cache.
>
> I don't think so.
>
> If we hadn't reset all properties in vc-before-save (file existed),
> nothing changes.
> If we did reset them, then yes, vc-working-revision will recompute
> vc-working-revision property, but only once after the reset.
> Which is what we want to do anyway, since the file's state has
> changed, and the working revision could have changed as well, so we
> need to know them to update mode-line.

Likely, the best option is to call (vc-registered file) after clearing
the file cache. This recomputes the 'vc-backend property as well, what
we want.

Calling (vc-mode-line file) at this point would be for the side-effect
of that function, which is bad in my experience. It would harden
maintenance, 'cause nobody will know why we want to refresh the modeline
at this point.

> By the way, this last patch I sent doesn't help if the user just
> removed the file from repository while leaving it on disk (git rm
> --cached ... && git commit ..., for example), but whatever.

If we use the cache, there will always be a constellation that the cache
is stale due to external operations. As Stefan said, this is mostly
uncritical.

Best regards, Michael.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.