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path: root/nixos/modules/system/boot/resolved.nix
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{ config, lib, pkgs, ... }:

with lib;

{

  options = {

    services.resolved.enable = mkOption {
      default = false;
      type = types.bool;
      description = ''
        Whether to enable the systemd DNS resolver daemon.
      '';
    };

  };

  config = mkIf config.services.resolved.enable {

    systemd.additionalUpstreamSystemUnits = [ "systemd-resolved.service" ];

    systemd.services.systemd-resolved = {
      wantedBy = [ "multi-user.target" ];
      restartTriggers = [ config.environment.etc."systemd/resolved.conf".source ];
    };

    environment.etc."systemd/resolved.conf".text = ''
      [Resolve]
      DNS=${concatStringsSep " " config.networking.nameservers}
    '';

    users.extraUsers.systemd-resolve.uid = config.ids.uids.systemd-resolve;
    users.extraGroups.systemd-resolve.gid = config.ids.gids.systemd-resolve;

  };

}