nixpkgs/nixos/modules/services/system/zrepl.nix

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

with lib;

let

  cfg = config.services.zrepl;

in

{

  ###### interface

  options = {

    services.zrepl = {

      enable = mkOption {
        type = types.bool;
        default = true;
        description = "Whether to enable the zrepl daemon.";
      };

      config = mkOption {
        type = types.lines;
        default = "";
        description = "Configuration to use for zrepl aemon.";
      };

    };

  };


  ###### implementation

  config = mkIf cfg.enable {
    environment.etc."zrepl.yml".text = cfg.config;

    systemd.services.zrepl =
      { description = "zrepl daemon";

        wantedBy = [ "multi-user.target" ];

        restartTriggers = [
          config.environment.etc."zrepl.yml".source
        ];

        serviceConfig =
          { ExecStart = "${pkgs.zrepl}/bin/zrepl daemon --config /etc/zrepl.yml";
            Type = "simple";
            RuntimeDirectory= "zrepl";
            RuntimeDirectoryMode= "0700";
          };
      };

  };
}