rbw: simplify 'pinentry' type

Following some upstream changes [1], it's now possible to use a simplified
package type for the option.

[1]: https://github.com/NixOS/nixpkgs/pull/133542

modules/misc/news.nix

@@ -1452,6 +1452,15 @@ in {
           'services.gpg-agent.pinentryPackage'.
         '';
       }
+
+      {
+        time = "2024-03-14T07:22:59+00:00";
+        condition = config.programs.rbw.enable;
+        message = ''
+          'programs.rbw.pinentry' has been simplified to only accept 'null' or
+          a package.
+        '';
+      }
     ];
   };
 }

modules/programs/rbw.nix

@@ -41,9 +41,9 @@ let
         };
 
         pinentry = mkOption {
-          type = with types; either package (enum pkgs.pinentry.flavors);
-          example = "gnome3";
-          default = "gtk2";
+          type = types.nullOr types.package;
+          example = literalExpression "pkgs.pinentry-gnome3";
+          default = null;
           description = ''
             Which pinentry interface to use. Beware that
             `pinentry-gnome3` may not work on non-Gnome
@@ -52,15 +52,9 @@ let
             ```nix
             services.dbus.packages = [ pkgs.gcr ];
             ```
-            For this reason, the default is `gtk2` for
-            now.
           '';
           # we want the program in the config
-          apply = val:
-            if builtins.isString val then
-              "${pkgs.pinentry.${val}}/bin/pinentry"
-            else
-              "${val}/${val.binaryPath or "bin/pinentry"}";
+          apply = val: if val == null then val else lib.getExe val;
         };
       };
     };
@@ -87,7 +81,7 @@ in {
         {
           email = "name@example.com";
           lock_timeout = 300;
-          pinentry = "gnome3";
+          pinentry = pkgs.pinentry-gnome3;
         }
       '';
       description = ''

tests/modules/programs/rbw/rbw-stubs.nix

@@ -5,12 +5,8 @@
 
   nixpkgs.overlays = [
     (self: super: {
-      pinentry = {
-        gnome3 =
+      pinentry-gnome3 =
         config.lib.test.mkStubPackage { outPath = "@pinentry-gnome3@"; };
-        gtk2 = config.lib.test.mkStubPackage { outPath = "@pinentry-gtk2@"; };
-        flavors = [ "gnome3" "gtk2" ];
-      };
     })
   ];
 }

tests/modules/programs/rbw/settings.nix

@@ -14,7 +14,7 @@ let
       "email": "name@example.com",
       "identity_url": "identity.example.com",
       "lock_timeout": 300,
-      "pinentry": "@pinentry-gnome3@/bin/pinentry"
+      "pinentry": "@pinentry-gnome3@/bin/dummy"
     }
   '';
 in {
@@ -27,7 +27,7 @@ in {
       base_url = "bitwarden.example.com";
       identity_url = "identity.example.com";
       lock_timeout = 300;
-      pinentry = "gnome3";
+      pinentry = pkgs.pinentry-gnome3;
     };
   };
 

tests/modules/programs/rbw/simple-settings.nix

@@ -14,7 +14,7 @@ let
       "email": "name@example.com",
       "identity_url": null,
       "lock_timeout": 3600,
-      "pinentry": "@pinentry-gtk2@/bin/pinentry"
+      "pinentry": null
     }
   '';
 in {