Reduce maintenance burden and increase efficiency by automatically
importing modules following a specific convention.
Co-authored-by: awwpotato <awwpotato@voidq.com>
Signed-off-by: Austin Horstman <khaneliman12@gmail.com>
Previously, if an invalid value was passed, the build would fail with:
error: attribute '"00:02:03"' missing
at /nix/store/sz92b5gqi0ma61d18fwbihi8p37mkvir-source/modules/services/nix-gc.nix:69:5:
68| in
69| freq.${frequency};
| ^
70|
There was an assertion that should have prevented this from happening
but the crash would happen before the assertion gets a chance to stop
the build with a nice error message.
This commit both gives the assertion a chance to trigger and improves
the assertion's error message.
The systemd.time documentation defines the shorthands `daily` and
`minutely` which are currently not included in the nix-gc module.
This commit adds the `daily` option, but omits `minutely` since it's not
a timescale that would make sense to run a gc for.
https://www.freedesktop.org/software/systemd/man/latest/systemd.time.html
