After upgrading a server with ikiwiki-hosting to the Debian 12 prerelease,
the cron job that runs `ikisite backup` no longer works. Minimal reproducer:

# ikisite backup mysite.example.com --filename=/dev/null
fatal: Need a repository to create a bundle.
error: git failed

I think this is because git now distrusts directories not owned by the
current user. The solution seems to be to switch uid to the site's owning
user before generating the backup's git bundle.

I proposed a fix upstream already.

    smcv

We believe that the bug you reported is fixed in the latest version of
ikiwiki-hosting, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1033692@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Simon McVittie <smcv@debian.org> (supplier of updated ikiwiki-hosting package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Thu, 30 Mar 2023 10:56:12 +0100
Source: ikiwiki-hosting
Architecture: source
Version: 0.20220716-2
Distribution: unstable
Urgency: medium
Maintainer: Simon McVittie <smcv@debian.org>
Changed-By: Simon McVittie <smcv@debian.org>
Closes: 1033692
Changes:
 ikiwiki-hosting (0.20220716-2) unstable; urgency=medium
 .
   * d/p/ikisite-backup-Create-the-bundle-as-the-site-s-user.patch:
     Add patch fixing `ikisite backup` with bookworm's git version
     (Closes: #1033692)
     - d/tests/create-delete: Add a regression test for `ikisite backup`,
       among other subcommands
   * d/p/ikiwiki-hosting.conf-Indicate-that-systemd-unit-needs-to-.patch:
     Mark patch as forwarded
   * d/control: Add missing dependency on rsync, detected by this version's
     additional test coverage
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