inventory: expose finalSettings of every machine

lib/modules/inventory/distributed-service/tests/default.nix

@@ -55,6 +55,7 @@ in
 {
   extraModules = import ./extraModules.nix { inherit clanLib; };
   exports = import ./exports.nix { inherit lib clanLib; };
+  settings = import ./settings.nix { inherit lib callInventoryAdapter; };
   resolve_module_spec = import ./import_module_spec.nix { inherit lib callInventoryAdapter; };
   test_simple =
     let

lib/modules/inventory/distributed-service/tests/settings.nix

@@ -0,0 +1,81 @@
+{ callInventoryAdapter, lib, ... }:
+let
+  res = callInventoryAdapter {
+    modules."A" = {
+      _class = "clan.service";
+      manifest = {
+        name = "network";
+      };
+      roles.peer.interface =
+        { lib, ... }:
+        {
+          options.timeout = lib.mkOption {
+            type = lib.types.int;
+          };
+        };
+      roles.controller.interface =
+        { lib, ... }:
+        {
+          options.maxPeers = lib.mkOption {
+            type = lib.types.int;
+          };
+        };
+    };
+    machines = {
+      jon = { };
+      sara = { };
+    };
+    instances."instance_foo" = {
+      module = {
+        name = "A";
+        input = "self";
+      };
+      # Settings for both jon and sara
+      roles.peer.settings = {
+        timeout = 40;
+      };
+      # Jon overrides timeout
+      roles.peer.machines.jon = {
+        settings.timeout = lib.mkForce 42;
+      };
+      roles.peer.machines.sara = { };
+    };
+  };
+
+  config = res.servicesEval.config.mappedServices.self-A;
+
+  #
+  applySettings =
+    instanceName: instance:
+    lib.mapAttrs (roleName: role: {
+      machines = lib.mapAttrs (machineName: _v: {
+        settings =
+          config.instances.${instanceName}.roles.${roleName}.machines.${machineName}.finalSettings.config;
+      }) role.machines;
+    }) instance.roles;
+
+  mapSettings = lib.mapAttrs applySettings config.instances;
+in
+{
+  test_simple = {
+    expr = mapSettings;
+    expected = {
+      instance_foo = {
+        peer = {
+          machines = {
+            jon = {
+              settings = {
+                timeout = 42;
+              };
+            };
+            sara = {
+              settings = {
+                timeout = 40;
+              };
+            };
+          };
+        };
+      };
+    };
+  };
+}