Re: [PATCH 2/2] builtin/receive-pack: convert to use git-maintenance(1)

> In 850b6edefa (auto-gc: extract a reusable helper from "git fetch",
> 2020-05-06), we have introduced a helper function `run_auto_gc()` that
> kicks off `git gc --auto`. The intent of this function was to pass down
> the "--quiet" flag to git-gc(1) as required without duplicating this at
> all callsites. In 7c3e9e8cfb (auto-gc: pass --quiet down from am,
> commit, merge and rebase, 2020-05-06) we then converted callsites that
> need to pass down this flag to use the new helper function. This has the
> notable omission of git-receive-pack(1), which is the only remaining
> user of `git gc --auto` that sets up the proccess manually. This is
> probably because it unconditionally passes down the `--quiet` flag and
> thus didn't benefit much from the new helper function.
>
> In a95ce12430 (maintenance: replace run_auto_gc(), 2020-09-17) we then
> replaced `run_auto_gc()` with `run_auto_maintenance()` which invokes
> git-maintenance(1) instead of git-gc(1). This command is the modern
> replacement for git-gc(1) and is both more thorough and also more
> flexible because administrators can configure which tasks exactly to run
> during maintenance.
>
> But due to git-receive-pack(1) not using `run_auto_gc()` in the first
> place it did not get converted to use git-maintenance(1) like we do
> everywhere else now. Address this oversight and start to use the newly
> introduced function `prepare_auto_maintenance()`. This will also make it
> easier for us to adapt this code together with all the other callsites
> that invoke auto-maintenance in the future.