flocon/config/nixos/services/greetd.nix

{
  config,
  inputs,
  lib,
  pkgs,
  ...
}:
# thanks https://git.jacekpoz.pl/poz/niksos/src/commit/f8d5e7ccd9c769f7c0b564f10dff419285e75248/modules/services/greetd.nix
let
  inherit (lib) getExe getExe';
  inherit (inputs.hyprland.packages.${pkgs.stdenv.system}) hyprland;

  hyprctl = getExe' hyprland "hyprctl";
  Hyprland = getExe' hyprland "Hyprland";

  greeter = getExe pkgs.greetd.gtkgreet;

  hyprlandConfig =
    pkgs.writeText "greetd-hyprland-config"
    ''
      misc {
          force_default_wallpaper=0
          focus_on_activate=1
      }

      animations {
          enabled=0
          first_launch_animation=0
      }

      workspace=1,default:true,gapsout:0,gapsin:0,border:false,decorate:false

      exec-once=[workspace 1;fullscreen;noanim] ${greeter} -l; ${hyprctl} dispatch exit
      exec-once=${hyprctl} dispatch focuswindow ${greeter}
    '';
in {
  services.greetd = {
    enable = true;
    settings = {
      default_session = {
        command = "${Hyprland} --config ${hyprlandConfig}";
        user = config.local.systemVars.username;
      };
    };
  };

  programs.regreet = {
    enable = true;
  };

  security.pam.services = {
    greetd.enableGnomeKeyring = true;
    login.enableGnomeKeyring = true;
    gdm-password.enableGnomeKeyring = true;
    greetd.fprintAuth = false;
  };

  environment.etc."greetd/environments".text = lib.strings.concatStringsSep "\n" [
    (lib.optionalString
      config.programs.hyprland.enable
      (
        if config.programs.hyprland.withUWSM
        then "uwsm start -S hyprland-uwsm.desktop"
        else "Hyprland"
      ))
    (lib.optionalString
      config.programs.sway.enable
      "sway")
  ];
}