Added multiple services and a module

modules/flood.nix

@@ -0,0 +1,91 @@
+{ config, pkgs, lib, ... }:
+with lib;
+let cfg = config.services.flood;
+in {
+  options = {
+    services.flood = {
+      enable = mkEnableOption (lib.mdDoc "Flood");
+
+      runDir = mkOption {
+        type = types.str;
+        default = "/var/lib/flood";
+      };
+
+      port = mkOption {
+        type = types.port;
+        default = 3030;
+        description = ''
+          The port for the Flood web interface
+        '';
+      };
+
+      openFirewall = mkOption {
+        type = types.bool;
+        default = false;
+        description = lib.mdDoc ''
+          Open ports in the firewall for the Flood web interface
+        '';
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "flood";
+        description = lib.mdDoc "User account under which Flood runs.";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "flood";
+        description = lib.mdDoc "Group under which Flood runs.";
+      };
+
+      package = mkOption {
+        type = types.package;
+        default = pkgs.flood;
+        defaultText = literalExpression "pkgs.flood";
+        description = lib.mdDoc ''
+          Flood package to use.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.tmpfiles.rules =
+      [ "d '${cfg.runDir}' 0700 ${cfg.user} ${cfg.group} - -" ];
+
+    systemd.services.flood = {
+      enable = true;
+      description = "Flood torrent UI";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+
+      serviceConfig = {
+        Type = "simple";
+        ExecStart = lib.concatStringsSep " " [
+          "${pkgs.flood}/bin/flood"
+          "--port ${toString cfg.port}"
+          "--host 0.0.0.0"
+          "--rundir ${cfg.runDir}"
+        ];
+        User = cfg.user;
+        Group = cfg.group;
+        Restart = "on-failure";
+      };
+    };
+
+    networking.firewall =
+      mkIf cfg.openFirewall { allowedTCPPorts = [ cfg.port ]; };
+
+    users.users = mkIf (cfg.user == "flood") {
+      flood = {
+        group = cfg.group;
+        home = cfg.runDir;
+        uid = config.ids.uids.flood;
+      };
+    };
+
+    users.groups =
+      mkIf (cfg.group == "flood") { flood.gid = config.ids.gids.flood; };
+  };
+}