From: Han Young <hanyang.tony@bytedance.com>
Date: Mon, 10 Feb 2025 11:38:17 GMT
Subject: Re: [External] [RFC PATCH resend] builtin/repack: Honor --keep-pack and .keep when repacking promisor objects
Message-ID: <CAG1j3zH1xngk0NZUjHA9Akx526yfEiQ=KsdfyRjE9XAewWV=Sg@mail.gmail.com>
In-Reply-To: <2728513.vuYhMxLoTh@mintaka.ncbr.muni.cz>

On Wed, Jan 29, 2025 at 6:12 PM Tomáš Trnka <trnka@scm.com> wrote:
>
> git-repack currently does not pass --keep-pack or --honor-pack-keep to
> the git-pack-objects handling promisor packs. This means that settings
> like gc.bigPackThreshold are completely ignored for promisor packs.
>
> The simple fix is to just copy the keep-pack logic into
> repack_promisor_objects(), although this could possibly be improved by
> making prepare_pack_objects() handle it instead.
>

We repack promisor packs by reading all the objects in promisor packs
(in repack.c), and send them to pack-objects. pack-objects then write a
single pack containing all the promisor objects. The actual old promisor
pack deletion happens in repack.c

So just simply copying the keep-pack logic to repack_promisor_objects()
does not prevent the keep promisor packs from being repacked.

One way to achieve what you wanted would be to filter the keep packs
in repack_promisor_objects's for_each_packed_object().

Thanks.