nixos/wireless: make wireless.interfaces mandatory

[rnhmjoj]

Motivation for this change

This is the only way to solve issue #101963, for now.

Things done

• Tested in 21.05
• Built manual
• Added a release notes entry if the change is major or breaking
• Fits CONTRIBUTING.md.

[rnhmjoj]

@jonringer Is updating the release notes after the release acceptable?

[jonringer]

I would say it's okay.

I guess it's better to fail fast, so I'm okay backporting these changes as well

[rnhmjoj]

Ok, thank you. I'm merging now.

[github-actions]

Successfully created backport PR #125917 for release-21.05.

[Izorkin]

There are no wireless interfaces on the server. An error occurs while the system is rebuilding:

Failed assertions:
- No network interfaces for wpa_supplicant have been configured.
Please, specify at least one using networking.wireless.interfaces.

[rnhmjoj]

@Izorkin This assertion is behind a gate networking.wireless.enable. Are you sure it's not enabled somewhere in your configuration?

[Izorkin]

Checked, there is no parameter networking.wireless.enable

[rnhmjoj]

Maybe you have imported a file that enables it, like nixos/modules/profiles/installation-device.nix. Also try setting networking.wireless.enable = lib.mkForce false;.

[Izorkin]

Thanks, found here:

{ pkgs, ... }:
let
  netboot = import (pkgs.path + "/nixos/lib/eval-config.nix") {
      modules = [
        (pkgs.path + "/nixos/modules/installer/netboot/netboot-minimal.nix")
        module
      ];
    };
...