feat(navidrome): add restart policy

options/server/navidrome.nix

@@ -11,6 +11,7 @@ let
     listOf
     submodule
     nonEmptyStr
+    str
     ;
   cfg = config.modules.server.navidrome;
 in
@@ -45,6 +46,14 @@ in
       };
     };
     settings = options.services.navidrome.settings;
+    restartPolicy = mkOption {
+      type = str;
+      default = "on-failure";
+      defaultText = ''
+        Refer to https://www.mankier.com/5/systemd.service#Options-Restart for possible values,
+        defines the restart behaviour in case the program ends.
+      '';
+    };
   };
 
   config = mkIf cfg.enable {
@@ -54,6 +63,10 @@ in
       options = cfg.library.source.options;
     };
 
+    systemd.tmpfiles.rules = mkIf (cfg.library.type == "nfs") [
+      "d ${cfg.library.path} - ${config.services.navidrome.group} - -"
+    ];
+
     services.navidrome = {
       enable = true;
       openFirewall = true;
@@ -63,6 +76,7 @@ in
     };
 
     systemd.services.navidrome.serviceConfig = {
+      Restart = cfg.restartPolicy;
       EnvironmentFile = config.age.secrets.navidrome.path;
     };
   };