Do systemd dependency checks inside the application

washed commented 6 months ago

From all the trouble we recently had with our service/unit file, I am wondering if it would make sense to move of those checks into the application itself. This would also allow us to react in a more fine-grained way to problems, i.e:

no network? ok -> spotify probably doesn't work (will need to check if cached stuff works without internet, probably not), but we could still play files!
no sound card -> we could still start up and emit useful logs, at least (and it would make it easier to configure which soundcard to expect)

Inspecting units and targets might be possible with this: https://github.com/lucab/libsystemd-rs

tmh-alex commented 6 months ago

Looks like a solid repo with lots of contributors. Let's do this!

tmh-alex commented 4 months ago

@washed Regarding the sound card issue: Just like the last time I was setting up the Raspi, also this time (I'm now on Bookworm btw.) the sound card got the number 1 assigned. The service file assumes 0 and the service doesn't start automatically as a consequence.

washed / drempelbox

Do systemd dependency checks inside the application #28