From ad97ab279e097960d6d080db10391c92cf25f8ca Mon Sep 17 00:00:00 2001
From: Jonas Rabenstein <jonas.rabenstein@emlix.com>
Date: Sat, 20 Sep 2025 00:17:22 +0200
Subject: [PATCH] module: plugin description

---
 module/plugins.nix | 63 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 module/plugins.nix

diff --git a/module/plugins.nix b/module/plugins.nix
new file mode 100644
index 0000000..31937e3
--- /dev/null
+++ b/module/plugins.nix
@@ -0,0 +1,63 @@
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
+let
+  cfg = config.services.jellyfin;
+
+  plugin = name: pks."jellyfin-plugin-${name}";
+
+  per-file = pkg: fn: lib.lists.foldl (acc: dll: acc ++ (fn dll)) pkg.pluginLibraries;
+
+  serviceConfig =
+    pkg:
+    let
+      make-rw = pkgs.writeShellScript "make-rw" ''
+        readonly src="${pkg}/''${1}"
+        readonly dst="${cfg.dataDir}/''${1}"
+        mkdir -p "''${dst%/*}"
+        [[ -f "''${dst}" ]] || cp "''${src}" "''${dst}"
+      '';
+    in
+    {
+      BindReadOnlyPaths = per-file pkg (
+        name: "${pkg}/${name}:${cfg.dataDir}/plugins/${pkg.name}/${name}"
+      );
+      BindPaths = per-file pkg (
+        name: lib.optional (rw name) "${cfg.dataDir}/plugins/${pkg.name}/${name}"
+      );
+    };
+
+  type.plugin = lib.types.addCheck lib.types.package (builtins.hasAttr "pluginLibraries");
+in
+{
+  options.services.jellyfin.plugins = lib.mkOption {
+    type = lib.types.listOf (lib.types.coercedTo lib.types.nonEmptyStr plugin type.plugin);
+    default = { };
+  };
+
+  config.systemd = lib.mkIf (cfg.plugins != { }) {
+    services.jellyfin.serviceConfig = lib.mkMerge (
+      [
+        { TemporaryFileSystem = [ "${cfg.dataDir}/plugins:ro" ]; }
+        { BindPaths = [ "${cfg.dataDir}/plugins/configurations/" ]; }
+      ]
+      ++ builtins.map serviceConfig cfg.plugins
+    );
+
+    tmpfiles.settings = lib.lists.foldl (
+      acc: pkg:
+      acc
+      // {
+        ${pkg.name}."${cfg.dataDir}/plugins/${pkgs.name}/${name}".C = {
+          group = cfg.group;
+          user = cfg.user;
+          mode = "0700";
+          argument = "${pkg}/${name}";
+        };
+      }
+    ) { } cfg.plugins;
+  };
+}