nixos-config/nixos/modules/services/home-assistant.nix

{ config, lib, pkgs, ... }:

with lib;

let

  cfg = config.services.homeAssistantConfig;

  mkMagicMergeOption = { description ? "", example ? { }, default ? { }, ... }:
    mkOption {
      inherit example description default;
      type = with lib.types;
        let
          valueType = nullOr
            (oneOf [
              bool
              int
              float
              str
              (attrsOf valueType)
              (listOf valueType)
            ]) // {
            description = "";
            emptyValue.value = { };
          };
        in
        valueType;
    };

in
{

  options.services.homeAssistantConfig = mkMagicMergeOption {
    description = ''
      home-assistant configuration
    '';
  };

  config = mkIf (cfg != null) { services.home-assistant.config = cfg; };
}