Have better error message if data/config folders can't be created because parent directory is missing

[Eeems]

See https://github.com/toltec-dev/toltec/pull/350#issuecomment-839978312 innernet should attempt to create the folder if it doesn't exist, and give a more meaningful error if it's missing.

[mcginty]

Huh, the ensure_dirs_exist(...) call at https://github.com/tonarino/innernet/blob/main/client/src/data_store.rs#L63 should be creating the directories if they don't exist. I feel like something else weird is going on - are there any weird permissions that might otherwise prevent the directory from being created?

[Eeems]

I did a manual mkdir -p with no issues. Which you can barely make out in the second screenshot in the linked issue. I can't remember if the parent directory existed or not.

[Eeems]

I've just tested, and it is indeed that the parent folder didn't exist yet.

[mcginty]

Hmm, do we want to actually have innernet create /var/lib if it's missing? That seems like it may be problematic since it's typically assumed to exist on systems that use FHS (which is all the systems we support, currently).

[Eeems]

It's probably fair to not create parent folders as it's something we have solved in toltec as part of the package install scripts. But it would be good to have a more user friendly if the parent folder is missing.

[mcginty]

Sounds good, thanks again for opening the issue.