nixos/lib/host.nix

{ pkgs, nixpkgs, nixos-unstable, unstable, home-manager, user, ... }:

{
  mkHost = { name, users, roles ? [] }: 
  let
    system = "x86_64-linux";

    mkRole = role : import (../roles + "/${role}.nix");

    users_mod= (map (u: user.mkUser {name = u.user; roles = u.roles; }) users);
    roles_mod = (map (r: mkRole r) roles);
  in nixpkgs.lib.nixosSystem {
    inherit system;

    modules = [ 
      {
        imports = users_mod ++ roles_mod;
        nixpkgs = {
          pkgs = pkgs;
        };

        nix.nixPath = [ 
          "nixpkgs=${nixpkgs}" 
          "unstable=${nixos-unstable}"
        ];
        nix.registry.nixpkgs.flake = nixpkgs;
        nix.registry.unstable.flake = nixos-unstable;

        users.users.root = {
          shell = pkgs.zsh;
        };

        home-manager.users.root.imports = [ ../roles/home/common.nix ];
        home-manager.extraSpecialArgs.unstable = unstable;
      }

      home-manager.nixosModules.home-manager
      ../roles/common.nix
      ../roles/acme.nix
      ../hosts/${name}/default.nix
    ];
  };
}