Re: git-visualize(1) plumbing equivalent

[Alejandro Colomar <alx@kernel.org>]

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Hi Ben,

> Date: 2026-10-03 13:10:43-0400
> From: "D. Ben Knoble" <ben.knoble@gmail.com>
>
> On Sat, Oct 3, 2026 at 11:13 AM Alejandro Colomar <alx@kernel.org> wrote:
> >
> > Hi Ben,
> >
> > > Date: 2026-10-03 09:45:17-0400
> > > From: "D. Ben Knoble" <ben.knoble@gmail.com>
> > >
> > > On Sat, Oct 3, 2026 at 6:13 AM Alejandro Colomar <alx@kernel.org> wrote:
> 
> [snip]
> 
> > > > Having read the documentation for git-bisect(1), visualize reads several
> > > > environment variables, and thus this code doesn't seem robust.  What
> > > > would be the plumbing version of the while-loop condition?
> > > >
> > > >                 git bisect visualize --oneline \
> > > >                 | wc -l \
> > > >                 | xargs -I{} test {} -gt 1;
> > > >
> > > > The goal is to know whether git-bisect(1) has found a commit yet or not,
> > > > to stop looping.
> > >
> > > I think you are probably looking for the (size of the) set of commits
> > > between bisect/bad and all the bisect/good-* refs. So you might need
> > > to "git refs list" the good ones, and feed those as negated refs
> > > alongside bisect/bad to rev-list?
> >
> > Yup, this seems to work:
> >
> > git refs list | grep refs/bisect/ | sed '/good/s/^/^/' | cut -f1 -d' ' | xargs git rev-list
> >
> > >
> > > In the general case, that wouldn't account for skipped commits as I
> > > understand it, where multiple commits are left at the end of the
> > > bisect, but in your script it doesn't look like you skip any.
> >
> > Hmmmm.  I'm now working on adding the ability to skip commits, so this
> > would be a problem.  Do you have any idea on how to deal with that?
> 
> Not offhand, sorry :/ I'm not totally sure how bisect represents that state.

Thanks anyway!  I think this is getting hard enough, that it might be
worth piping a heredocument into a mktemp(1) file within the script, and
passing that to 'git bisect run'.


Cheers,
Alex

-- 
<https://www.alejandro-colomar.es>

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