ci: fix eval warn errors in hydra due to svc module eval

Author: johnalotoski

nix/nixos/cardano-node-service.nix

@@ -997,13 +997,11 @@ in {
         }
       ];
 
-      warnings = (
-        optional (cfg.useNewTopology != null) ''
-          The useNewTopology option is deprecated and will be removed in the future. As of cardano-node 10.6.0, this option should remain null.
-          For older node versions, a bool value can be set, but this will only be supported until the Dijkstra hard fork at which point all
-          cardano-node versions will be compelled to upgrade and the useNewTopology option will be removed.
-        ''
-      );
+      warnings = optional (cfg.useNewTopology != null) ''
+        The useNewTopology option is deprecated and will be removed in the future. As of cardano-node 10.6.0, this option should remain null.
+        For older node versions, a bool value can be set, but this will only be supported until the Dijkstra hard fork at which point all
+        cardano-node versions will be compelled to upgrade and the useNewTopology option will be removed.
+      '';
     }
   ]);
 }

nix/svclib.nix

@@ -239,6 +239,7 @@ let
     systemdCompat.options = {
       systemd.services = mkOption {};
       assertions = [];
+      warnings = [];
       users = mkOption {};
       environment = mkOption {};
     };

nix/workbench/service/generator.nix

@@ -112,6 +112,7 @@ let
           systemd.sockets = mkOption {};
           users = mkOption {};
           assertions = mkOption {};
+          warnings = [];
           environment = mkOption {};
         };
         eval =

nix/workbench/service/nodes.nix

@@ -53,7 +53,7 @@ let
        then go {} (__head eras) (__tail eras)
        else throw "configHardforksIntoEra:  unknown era '${era}'";
 
-  liveTablesPath = i: 
+  liveTablesPath = i:
     if (profile.node ? "ssd_directory" && profile.node.ssd_directory != null)
     then "${profile.node.ssd_directory}/lmdb-node-${toString i}"
     else null;
@@ -194,8 +194,16 @@ let
       systemd.sockets = mkOption {};
       users = mkOption {};
       assertions = mkOption {};
+      warnings = [];
       environment = mkOption {};
     };
+    warnCompat.options = {
+      warnings = mkOption {
+        type = types.listOf types.str;
+        default = [];
+        description = "Avoid errors on warning eval in cardano-node-service";
+      };
+    };
     eval = let
       extra = {
         services.cardano-node = {

nix/workbench/service/tracer.nix

@@ -62,6 +62,7 @@ let
         systemd.sockets = mkOption {};
         users = mkOption {};
         assertions = mkOption {};
+        warnings = [];
         environment = mkOption {};
       };
       eval = evalModules {