From a5870ba1d65487ceef7f2fb7525022d17d4e087f Mon Sep 17 00:00:00 2001
From: Kaleb Debre <kaleb.debre@web.de>
Date: Fri, 3 Oct 2025 12:57:57 +0200
Subject: [PATCH] nixos module - allow for setting only the user or group under
 which the service runs + readme.md

---
 README.md                           | 10 ++++++++++
 contrib/nixos/modules/copyparty.nix | 17 ++++++++++-------
 2 files changed, 20 insertions(+), 7 deletions(-)

diff --git a/README.md b/README.md
index 06a35efb..97232c9c 100644
--- a/README.md
+++ b/README.md
@@ -2466,6 +2466,10 @@ copyparty on NixOS is configured via `services.copyparty` options, for example:
 ```nix
 services.copyparty = {
   enable = true;
+  # the user to run the service as
+  user = "copyparty"; 
+  # the group to run the service as
+  group = "copyparty"; 
   # directly maps to values in the [global] section of the copyparty config.
   # see `copyparty --help` for available options
   settings = {
@@ -2490,6 +2494,12 @@ services.copyparty = {
     k.passwordFile = "/run/keys/copyparty/k_password";
   };
 
+  # create a group
+  groups = {
+    # users "ed" and "k" are part of the group g1
+    g1 = [ "ed" "k" ];
+  };
+
   # create a volume
   volumes = {
     # create a volume at "/" (the webroot), which will
diff --git a/contrib/nixos/modules/copyparty.nix b/contrib/nixos/modules/copyparty.nix
index 2a553003..ed183fb9 100644
--- a/contrib/nixos/modules/copyparty.nix
+++ b/contrib/nixos/modules/copyparty.nix
@@ -370,12 +370,16 @@ in
         ) cfg.volumes
       );
 
-      users.groups.copyparty = lib.mkIf (cfg.user == "copyparty" && cfg.group == "copyparty") { };
-      users.users.copyparty = lib.mkIf (cfg.user == "copyparty" && cfg.group == "copyparty") {
-        description = "Service user for copyparty";
-        group = "copyparty";
-        home = externalStateDir;
-        isSystemUser = true;
+      users.groups = lib.mkIf (cfg.group == "copyparty") {
+        copyparty = { };
+      };
+      users.users = lib.mkIf (cfg.user == "copyparty") {
+        copyparty = {
+          description = "Service user for copyparty";
+          group = cfg.group;
+          home = externalStateDir;
+          isSystemUser = true;
+        };
       };
       environment.systemPackages = lib.mkIf cfg.mkHashWrapper [
         (pkgs.writeShellScriptBin "copyparty-hash" ''
@@ -394,4 +398,3 @@ in
     }
   );
 }
-