feat(shiro): Added preliminary jellyfin.nix module

modules/jellyfin.nix

@@ -0,0 +1,74 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.jellyfin;
+in
+{
+  options.services.jellyfin = {
+    enable = mkEnableOption "Jellyfin Media Server";
+
+    package = mkOption {
+      type = types.package;
+      default = pkgs.jellyfin;
+      defaultText = literalExpression "pkgs.jellyfin";
+      description = "The package to use for Jellyfin";
+    };
+
+    user = mkOption {
+      type = types.str;
+      default = "jellyfin";
+      description = "User account under which Jellyfin runs.";
+    };
+
+    group = mkOption {
+      type = types.str;
+      default = "jellyfin";
+      description = "Group under which Jellyfin runs.";
+    };
+
+    dataDir = mkOption {
+      type = types.path;
+      default = "/var/lib/jellyfin";
+      description = "Directory where Jellyfin stores its data files";
+    };
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [ cfg.package ];
+
+    launchd.daemons.jellyfin = {
+      command = "${lib.getExe cfg.package} --datadir '${cfg.dataDir}'";
+      serviceConfig = {
+        Label = "org.jellyfin.server";
+        RunAtLoad = true;
+        KeepAlive = true;
+        UserName = cfg.user;
+        GroupName = cfg.group;
+        WorkingDirectory = cfg.dataDir;
+        StandardOutPath = "/var/log/jellyfin.log";
+        StandardErrorPath = "/var/log/jellyfin.error.log";
+      };
+    };
+
+    users.users = mkIf (cfg.user == "jellyfin") {
+      jellyfin = {
+        isSystemUser = true;
+        group = cfg.group;
+        home = cfg.dataDir;
+        createHome = true;
+      };
+    };
+
+    users.groups = mkIf (cfg.group == "jellyfin") {
+      jellyfin = {};
+    };
+
+    # Create necessary directories and set permissions
+    system.activationScripts.preActivation.text = ''
+      mkdir -p ${cfg.dataDir}
+      chown ${cfg.user}:${cfg.group} ${cfg.dataDir}
+    '';
+  };
+}