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# SPDX-FileCopyrightText: 2021 Kirill Elagin <https://kir.elagin.me/>
#
# SPDX-License-Identifier: MPL-2.0 or MIT
{ lib }:
let
inherit (builtins) stringLength;
in
{
# RFC 1035, 3.1
domain-name = lib.types.addCheck lib.types.str (s: stringLength s <= 255);
}