nix_multiuser/users.nix

{ pkgs, ... }:
let
  home-manager = builtins.fetchTarball "https://github.com/nix-community/home-manager/archive/master.tar.gz";
  prefix = "/server/current";
in
{
  imports = [
    (import "${home-manager}/nixos")
  ];

  systemd.tmpfiles.rules = [
    "d /server 0755 root root"
    "d /server/current 0755 root root"
  ];

  users.users = 
  let
    user =
      { zsh ? false, manager ? false, name, passwd }: {
        isNormalUser = true;
        home = "${prefix}/${name}";
        createHome = true;
        extraGroups = [ "current" ] ++ 
          (if manager then ["docker" "wheel"] else []);
        shell = (if zsh then pkgs.zsh else pkgs.bash);
        password = passwd;
      };
  in
  {
    junikim = user { manager = true; name = "junikim"; passwd = "1234"; };
    a = user { zsh = true; name = "a"; passwd = "1234"; };
    b = user { name = "b"; passwd = "1234"; };
    c = user { name = "c"; passwd = "1234"; };
  };

  home-manager.users = 
  let
    user = name: {
      home = {
        username = name;
        homeDirectory = "${prefix}/${name}";
        stateVersion = "22.05";
      };
      programs = {
        home-manager.enable = true;
        neovim = {
          enable = true;
          plugins = with pkgs.vimPlugins; [
            neovim-sensible
            vim-airline
            vim-airline-themes
            vim-nix
          ];
        };
        git = {
          enable = true;
        };
      };
    };
  in {
    junikim = user "junikim";
    a = user "a";
    b = user "b";
  };
}