Share options between resource and config

infra/common/options.nix

@@ -0,0 +1,21 @@
+{ lib, ... }:
+
+let
+  inherit (lib) mkOption;
+
+in
+{
+  options = {
+    procolixVm = {
+      name = mkOption { };
+      host = mkOption { };
+
+      hostPublicKey = mkOption {
+        description = ''
+          The host public key of the machine. It is used in particular
+          to filter Age secrets and only keep the relevant ones.
+        '';
+      };
+    };
+  };
+}

infra/common/resource.nix

@@ -6,7 +6,7 @@
 }:
 
 let
-  inherit (lib) attrValues elem mkOption;
+  inherit (lib) attrValues elem;
   inherit (lib.attrsets) concatMapAttrs optionalAttrs;
   inherit (lib.strings) removeSuffix;
 
@@ -16,19 +16,7 @@ let
 
 in
 {
-  options = {
+  imports = [ ./options.nix ];
-    procolixVm = {
-      name = mkOption { };
-      host = mkOption { };
-
-      hostPublicKey = mkOption {
-        description = ''
-          The host public key of the machine. It is used in particular
-          to filter Age secrets and only keep the relevant ones.
-        '';
-      };
-    };
-  };
 
   config =
     let
@@ -46,9 +34,14 @@ in
       nixos.module = {
         imports = [
           inputs.agenix.nixosModules.default
+          ./options.nix
           ./nixosConfiguration
         ];
 
+        ## Inject the shared options from the resource's `config` into the NixOS
+        ## configuration.
+        procolixVm = config.procolixVm;
+
         ## Read all the secrets, filter the ones that are supposed to be
         ## readable with this host's public key, and add them correctly to the
         ## configuration as `age.secrets.<name>.file`.

infra/flake-part.nix

@@ -21,7 +21,7 @@ let
         type = providers.local.exec;
         imports = [
           inputs.nixops4-nixos.modules.nixops4Resource.nixos
-          ./common/procolixResource.nix
+          ./common/resource.nix
           (./. + "/${vmName}")
         ];
         procolixVm.name = vmName;