refactor(copyparty): default writable volume settings

configs/nixos/guests/copyparty.nix

@@ -5,10 +5,11 @@
 }:
 let
   cfg = config.guests.copyparty; # NOLINT(let_order)
+  accountName = config.user.name;
 
-  stateDir = "/var/lib/copyparty";
+  volumeType = lib.types.submodule (
-
+    { config, ... }:
-  volumeType = lib.types.submodule {
+    {
       options = {
         hostPath = lib.mkOption {
           type = lib.types.str;
@@ -22,7 +23,7 @@ let
 
         access = lib.mkOption {
           type = lib.types.attrsOf (lib.types.listOf lib.types.str);
-        default = { };
+          default.A = [ accountName ];
           description = "Copyparty access map from permission string to account names.";
         };
 
@@ -34,11 +35,21 @@ let
 
         flags = lib.mkOption {
           type = lib.types.attrs;
-        default = { };
+          default =
+            if config.readOnly then
+              { }
+            else
+              {
+                d2d = true;
+                d2t = true;
+                dthumb = true;
+              };
           description = "Copyparty volume flags.";
         };
       };
-  };
+    }
+  );
+  stateDir = "/var/lib/copyparty";
 in
 {
   options.guests.copyparty = {

configs/nixos/hosts/pikachu/default.nix

@@ -135,22 +135,10 @@
       "/inbox" = {
         hostPath = "/pikachu/__inbox";
         path = "/pikachu/__inbox";
-        access.A = [ config.user.name ];
-        flags = {
-          d2d = true;
-          d2t = true;
-          dthumb = true;
-        };
       };
       "/media" = {
         hostPath = "/pikachu/media";
         path = "/pikachu/media";
-        access.A = [ config.user.name ];
-        flags = {
-          d2d = true;
-          d2t = true;
-          dthumb = true;
-        };
       };
       "/opds" = {
         hostPath = "/pikachu/data/opds";