Re: Something like $Id$, $Revision$ or $Date$?

[Francis Galiegue <fg@one2team.com>]

Le Monday 10 November 2008 21:17:29 Jakub Narebski, vous avez écrit :
> Michal Nazarewicz wrote:
> > Jakub Narebski <jnareb@gmail.com> writes:
> >> Dnia poniedziałek 10. listopada 2008 18:38, Michal Nazarewicz napisał:
> >>> Jakub Narebski <jnareb@gmail.com> writes:
> >>>> The reason why git doesn't support keywords like $Revision$ or $Date$
> >>>> is performance: the $Revision$ and $Date$ are keywords related to
> >>>> _commit_ data, not blob data.
> >>>
> >>> In my case identifying content not commit would be even better.
> >>
> >> Well, in that case using `ident` attribute would be enough
> >> (but cryptic).
> >
> > Yes, but it forces me to do some voodoo magic (ie. checkout) to get the
> > Id in the file, ;) like so:
> >
> > #v+
> > $ echo '$Id$'>bar && git add bar && git commit -m 'Added bar' && cat bar
> > Created commit d49d436: Added bar
> >  1 files changed, 1 insertions(+), 0 deletions(-)
> >  create mode 100644 bar
> > $Id$
> > $ rm bar && git checkout bar && cat bar
> > $Id: 055c8729cdcc372500a08db659c045e16c4409fb $
> > #v-
>
> Well, _some_ command has to be invoked to expand keywords. "git add"
> doesn't do that (perhaps it should?), so you need to use checkout.
>

If "git add" aims to do that, you'd have to be very, VERY careful, not to 
substitute in the wrong place to start with, not to attempt substitution in 
binary files...

And this would have a sizeable cost, imho. If you really want to do this, 
isn't there a hook somewhere that can do that for you, instead of modifying 
git add directly?

-- 
Francis Galiegue
ONE2TEAM
Ingénieur système
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