Re: [Qgit RFC] commit --amend

> On Fri, Jul 06, 2007 at 10:12:50 +0200, Marco Costalba wrote:
> > On 7/5/07, Jan Hudec <bulb@ucw.cz> wrote:
> >> Therefore I'll either have to always ask git via run("git-rev-parse HEAD",
> >> head), add HEAD into the map, or store HEAD somewhere in the Git object.
> >> Which do you think makes most sense?
> >
> > Asking git when you need it and keep HEAD value only for the minimum
> > time required to execute the commit command.
> >
> > - HEAD is very 'volatile'
> >
> > - commit is _not_ performance critical.
> >
> > - commit, being a write operation, is instead bugs/misbehaviour
> > critical (a big point to use an high level "git-commit" BTW)
> >
> > - asking git with getRefSha("HEAD", ANY_REF, true)  is very quick and
> > in any case much quicker then the whole commit dance.
>
> Yes. It is also much faster to write in code, but...
>
> > - someone can always change the repo behind you, qgit is not the only
> > interface to git ;-) does exist also the command line.
>
> And the commit in qgit should better fail loudly if that happens, because the
> list of files or something else might no longer make sense.
>
> There is actually just one thing I need the head for -- passing it as 3rd
> argument to git-update-ref. That should be done purely as safety measure --
> if the value does not match, the command will fail. And for that safety
> measure to be useful, I need value of the head at the time user openend the
> commit dialog, NOT the time user clicked on commit button.
>