feat/lower squashfs size unpearl

[blaggacao]

Context

• The pearl dependency sums roughly another ~50-80MB in total
• This needs to be put into squashfs and ends up increasing RAM requirement (not by the actual 50-80MB but by some potentially linear fraction)

Unfortunately I'm not versed enough in C to reimplement the two packages that are in the critical path.

Call for Help

To create a base-line from which to comfortably start working, if you're versed enough in C, this is what I did so far:

• I did pipe the perl scripts through AI to create a rough sceleton
• I wired things together so that the green tests should start indicating that the scripts are working

To run the tests, I had manually had to change permission of a store path:

chmod 400 /nix/store/gy10hwl8l8msabrda2lwc7njw1x27j3p-id_ed25519

You might need to do the same.

[Mic92]

We also have sysusers integrated in NixOS, which is already part of systemd: systemd.sysusers.enable
Than we also don't need perl.

[blaggacao]

Ah interesting! I did see it briefly without grasping its purpose or function, at all.

You're saying (?): it's a substitute to the update-users-groups.pl which is awesome, because that file is a lot more complex to rewrite in c than the setup-etc.pl one.

Nice!

[Mic92]

We still have switch-to-configuration.pl after that.

[blaggacao]

That's true.

Maybe I did ingest that wrongly, however my current understanding was that nixos-anywhere at "most" requires nixos-install which depends on nixos-enter and if that depends on switch-to-..., then it indeed escaped my attention.

[Mic92]

No I mean. There is also a switch-to-configuration that the system itself has independent on those nixos tools.

[blaggacao]

Ah, I guess that was weeded out by system.switch.enable = false; down below

[blaggacao]

I just realized /profiles/perlless.nix on unstable. So I better close this PR.

The other measures and approaches are still contained in #211