full rewrite, first commit

modules/nixos/services/invidious/default.nix

@@ -0,0 +1,30 @@
+{
+  lib,
+  config,
+  pkgs,
+  namespace,
+  ...
+}:
+with lib;
+with lib.${namespace};
+let
+  cfg = config.${namespace}.services.invidious;
+in
+{
+  options.${namespace}.services.invidious = {
+    enable = mkEnableOption "Invidious";
+    domain = mkOption {
+      type = types.string;
+      default = "localhost";
+      description = "Domain to use for absolute URLs";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    services.invidious = {
+      enable = true;
+      domain = cfg.domain;
+      extraSettingsFile = "/var/lib/invidious/settings.yml";
+    };
+  };
+}