nixpkgs/nixos/modules/services/security/fprintd.nix

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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.services.fprintd;
in
{
###### interface
options = {
services.fprintd = {
enable = mkOption {
type = types.bool;
default = false;
description = ''
Whether to enable fprintd daemon and PAM module for fingerprint readers handling.
'';
};
package = mkOption {
type = types.package;
default = pkgs.fprintd;
defaultText = "pkgs.fprintd";
description = ''
fprintd package to use.
'';
};
};
};
###### implementation
config = mkIf cfg.enable {
services.dbus.packages = [ pkgs.fprintd ];
environment.systemPackages = [ pkgs.fprintd ];
systemd.packages = [ cfg.package ];
};
}