[bug#71639] [PATCH WIP 0/5] Improve on restic-backup-service

[Richard Sent <richard@freakingpenguin.com>]

Hi all!

This is the previously promised [1] patch series relating to
restic-backup-service. The highlights:

1. init? was added that bootstraps a new backup.

2. RESTIC_PASSWORD_COMMAND support.

3. Add extra-packages field for jobs.

4. Move restic from restic-backup-job to restic-backup-configuration.

5. Add a basic system-level test suite.

Regarding 4, the previous way felt a bit orthogonal to how services of a
similar nature work. (For example, you don't specify an mcron package for
every job.) I can't think of a use case for mixing-and-matching restic
packages with different jobs. If there is a reason, I think a good compromise
would be a "restic-override" job field.

I'm marking this as WIP because there are a couple more things I want to
investigate, but it feels complete enough to submit for feedback. My main
point of interest is what can be done to improve support for Restic's other
backends, see [2]. I imagine 0.9.6 only supports a subset of those, but still.

In my dream world we could combine this patch with an upgrade to the restic
package itself (which, among other things, supports compression). I asked the
developers about (re)including a vendor directory in their tarball but haven't
heard back [3]. Perhaps this service can spark some action on an old Guix
tracking issue [4].

[1]: https://issues.guix.gnu.org/69513#7
[2]: https://restic.readthedocs.io/en/stable/030_preparing_a_new_repo.html
[3]: https://github.com/restic/restic/issues/3945#issuecomment-2141090355
[4]: https://issues.guix.gnu.org/63019

Richard Sent (5):
  services: backup: Support bootstrapping an initial restic backup
  services: backup: Add password-command support to restic-service
  services: backup: Add extra-packages field to restic-backup-job
  services: backup: Move restic package to restic-configuration
  tests: Add restic system test.

 doc/guix.texi           |  21 ++++++-
 gnu/services/backup.scm | 131 +++++++++++++++++++++++++++++-----------
 gnu/tests/restic.scm    | 124 +++++++++++++++++++++++++++++++++++++
 3 files changed, 238 insertions(+), 38 deletions(-)
 create mode 100644 gnu/tests/restic.scm


base-commit: a575d0f5d5322bac977423b6bd2742c8dc5a14a6
-- 
2.45.1