nixos/vim: assert that both enable and defaultEditor is set (#421449)

    package = lib.mkPackageOption pkgs "vim" { example = [ "vim-full" ]; };

  };

  # TODO: convert it into assert after 24.11 release

  config = lib.mkIf (cfg.enable || cfg.defaultEditor) {

    warnings = lib.mkIf (cfg.defaultEditor && !cfg.enable) [

      "programs.vim.defaultEditor will only work if programs.vim.enable is enabled, which will be enforced after the 24.11 release"

    assertions = [

      {

        assertion = cfg.defaultEditor -> cfg.enable;

        message = "{option}`programs.vim.defaultEditor` requires {option}`programs.vim.enable` to be set to true.";

      }

    ];

    environment = {

      systemPackages = [ cfg.package ];