Re: [RFC/PATCH 3/3] receive-pack: allow a maximum input size to be specified

> The simple fix is to call register_tempfile() in open_pack_file(), and
> just have index-pack clean up the file on its way out.
>
> But there are harder cases. For instance, imagine somebody pushes a
> 500MB file, and you have a pre-receive hook that says "too big; I won't
> accept this". And then they push in a loop, as before. You've accepted
> the incoming pack into the repository by the time the pre-receive runs.
> You can't just delete it, because you don't know if other simultaneous
> processes have started to depend on the objects.
>
> To solve that, I have patches that put incoming packfiles into a
> "quarantine" area, then run the connectivity check and pre-receive hooks
> with the quarantine accessible via GIT_ALTERNATE_OBJECT_DIRECTORIES. And
> then we either move the quarantine packs into the real repo, or blow
> away the tmpdir, depending on whether the hooks said the objects were
> OK.
>
> Those are patches I plan to share upstream but just haven't gotten
> around to yet.