Working on cross-seed and updated the thanks

nixarr/transmission/cross-seed/default.nix

@@ -0,0 +1,75 @@
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+with lib; let
+  cfg = config.util-nixarr.services.prowlarr;
+  #settingsFormat = pkgs.formats.json {};
+  #settingsFile = settingsFormat.generate "settings.json" cfg.settings;
+  cross-seedPkg = import ../../../pkgs/cross-seed { inherit (pkgs) stdenv lib fetchFromGitHub; };
+in {
+  options = {
+    util-nixarr.services.prowlarr = {
+      enable = mkEnableOption "cross-seed";
+
+      configFile = mkOption {
+        type = with types; nullOr path;
+        default = null;
+        example = "/var/lib/secrets/cross-seed/settings.js";
+        description = "";
+      };
+
+      dataDir = mkOption {
+        type = types.path;
+        default = "/var/lib/cross-seed";
+      };
+
+      user = mkOption {
+        type = types.str;
+        default = "cross-seed";
+        description = "User account under which cross-seed runs.";
+      };
+
+      group = mkOption {
+        type = types.str;
+        default = "cross-seed";
+        description = "Group under which cross-seed runs.";
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.tmpfiles.rules = [
+      "d '${cfg.dataDir}' 0700 ${cfg.user} ${cfg.group} - -"
+    ];
+
+    systemd.services.prowlarr = {
+      description = "cross-seed";
+      after = ["network.target"];
+      wantedBy = ["multi-user.target"];
+
+      environment.CONFIG_DIR = cfg.dataDir;
+
+      serviceConfig = {
+        ExecStartPre = [("+" + pkgs.writeShellScript "transmission-prestart" ''
+          mv ${cfg.configFile} ${cfg.dataDir}
+        '')];
+        Type = "simple";
+        User = cfg.user;
+        Group = cfg.group;
+        ExecStart = "${getExe cross-seedPkg} daemon";
+        Restart = "on-failure";
+      };
+    };
+
+    users.users = mkIf (cfg.user == "cross-seed") {
+      cross-seed = {
+        group = cfg.group;
+      };
+    };
+
+    users.groups = mkIf (cfg.group == "cross-seed") {};
+  };
+}

nixarr/transmission/default.nix

@@ -41,18 +41,29 @@ in {
 
     flood.enable = mkEnableOption "the flood web-UI for the transmission web-UI.";
 
-    privateTrackers = mkOption {
-      type = types.bool;
-      default = false;
-      description = ''
-        Disable pex and dht, which is required for some private trackers.
+    privateTrackers = {
+      disableDhtPex = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Disable pex and dht, which is required for some private trackers.
 
-        You don't want to enable this unless a private tracker requires you
-        to, and some don't. All torrents from private trackers are set as
-        "private", and this automatically disables dht and pex for that torrent,
-        so it shouldn't even be a necessary rule to have, but I don't make
-        their rules ¯\\_(ツ)_/¯.
-      '';
+          You don't want to enable this unless a private tracker requires you
+          to, and some don't. All torrents from private trackers are set as
+          "private", and this automatically disables dht and pex for that torrent,
+          so it shouldn't even be a necessary rule to have, but I don't make
+          their rules ¯\\_(ツ)_/¯.
+        '';
+      };
+      cross-seed = {
+        enable = mkOption {
+          type = types.bool;
+          default = false;
+          description = ''
+            Enable the cross-seed service.
+          '';
+        };
+      };
     };
 
     messageLevel = mkOption {
@@ -94,6 +105,10 @@ in {
     };
   };
 
+  imports = [
+    ./cross-seed
+  ];
+
   config = mkIf cfg.enable {
     assertions = [
       {
@@ -103,6 +118,12 @@ in {
           nixarr.vpn.enable option to be set, but it was not.
         '';
       }
+      {
+        assertion = cfg.privateTrackers.cross-seed.enable -> nixarr.prowlarr.enable;
+        message = ''
+          TODO: todo
+        '';
+      }
     ];
 
     systemd.tmpfiles.rules = [
@@ -150,7 +171,6 @@ in {
           anti-brute-force-enabled = true;
           anti-brute-force-threshold = 10;
 
-          # 0 = None, 1 = Critical, 2 = Error, 3 = Warn, 4 = Info, 5 = Debug, 6 = Trace
           message-level =
             if cfg.messageLevel == "none"
             then 0
@@ -171,6 +191,13 @@ in {
         // cfg.extraConfig;
     };
 
+    services.cross-seed = mkIf cfg.cross-seed.enable {
+      enable = true;
+      group = "media";
+      dataDir = cfg.privateTrackers.cross-seed.dataDir;
+      configFile = cfg.privateTrackers.cross-seed.configFile;
+    };
+
     util-nixarr.vpnnamespace = mkIf cfg.vpn.enable {
       portMappings = [
         {