{ config, lib, pkgs, ... }: with lib; let pkg = pkgs.ostinato; cfg = config.services.ostinato; configFile = pkgs.writeText "drone.ini" '' [General] RateAccuracy=${cfg.rateAccuracy} [RpcServer] Address=${cfg.rpcServer.address} [PortList] Include=${concatStringsSep "," cfg.portList.include} Exclude=${concatStringsSep "," cfg.portList.exclude} ''; in { ###### interface options = { services.ostinato = { enable = mkEnableOption (lib.mdDoc "Ostinato agent-controller (Drone)"); port = mkOption { type = types.port; default = 7878; description = lib.mdDoc '' Port to listen on. ''; }; rateAccuracy = mkOption { type = types.enum [ "High" "Low" ]; default = "High"; description = lib.mdDoc '' To ensure that the actual transmit rate is as close as possible to the configured transmit rate, Drone runs a busy-wait loop. While this provides the maximum accuracy possible, the CPU utilization is 100% while the transmit is on. You can however, sacrifice the accuracy to reduce the CPU load. ''; }; rpcServer = { address = mkOption { type = types.str; default = "0.0.0.0"; description = lib.mdDoc '' By default, the Drone RPC server will listen on all interfaces and local IPv4 addresses for incoming connections from clients. Specify a single IPv4 or IPv6 address if you want to restrict that. To listen on any IPv6 address, use :: ''; }; }; portList = { include = mkOption { type = types.listOf types.str; default = []; example = [ "eth*" "lo*" ]; description = lib.mdDoc '' For a port to pass the filter and appear on the port list managed by drone, it be allowed by this include list. ''; }; exclude = mkOption { type = types.listOf types.str; default = []; example = [ "usbmon*" "eth0" ]; description = lib.mdDoc '' A list of ports does not appear on the port list managed by drone. ''; }; }; }; }; ###### implementation config = mkIf cfg.enable { environment.systemPackages = [ pkg ]; systemd.services.drone = { description = "Ostinato agent-controller"; wantedBy = [ "multi-user.target" ]; script = '' ${pkg}/bin/drone ${toString cfg.port} ${configFile} ''; }; }; }