On Mon, Jun 08, 2015 at 06:00:09PM +0200, Johannes Schindelin wrote:
> >> I like the idea, but I am a bit uncertain whether it would constitute
> >> "too backwards-incompatible" a change to make this an error. I think
> >> it could be argued both ways: it *is* an improvement, but it could
> >> also possibly disrupt scripts that work pretty nicely at the moment.
> >
> > What kind of script are you worried about?
>
> I was concerned about scripts that work on repositories whose reflogs
> become inconsistent for whatever reason (that happened a lot to me in
> the past, IIRC it had something to do with bare repositories and/or
> shared object databases).
I think these repositories are already broken. You cannot run `git gc`
in such a repository, as it will barf when trying to walk the reflog
tips during `git repack`.
We run into this exact situation at GitHub because of our shared object
databases. Our per-fork repack code basically has to do:
if ! git repack ...; then
git reflog expire --expire-unreachable=all --all &&
git repack ... ||
die "ok, it really is broken"
fi
-Peff
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