cluster/catalog: expose simulacrum tests

cluster/catalog/default.nix

@@ -2,5 +2,6 @@
   imports = [
     ./services.nix
     ./secrets.nix
+    ./simulacrum.nix
   ];
 }

cluster/catalog/simulacrum.nix

@@ -0,0 +1,35 @@
+{ config, extendModules, lib, ... }:
+
+let
+  inherit (config) cluster;
+in
+
+{
+  perSystem = { pkgs, ... }: {
+    catalog.cluster = {
+      simulacrum = lib.mapAttrs (name: svc: {
+        description = "Simulacrum test: ${name}";
+        actions = let
+          runSimulacrum = pkgs.callPackage ../simulacrum {
+            inherit config extendModules;
+          };
+
+          test = runSimulacrum {
+            service = name;
+          };
+        in {
+          build = {
+            description = "Build this test.";
+            command = "nix build -L --no-link '${builtins.unsafeDiscardStringContext test.drvPath}^*'";
+          };
+          runInteractive = {
+            description = "Run interactive driver.";
+            command = ''
+              ${pkgs.bubblewrap}/bin/bwrap --unshare-all --bind / / --dev-bind /dev /dev ${lib.getExe test.driverInteractive}
+            '';
+          };
+        };
+      }) (lib.filterAttrs (_: svc: svc.simulacrum.enable) cluster.config.services);
+    };
+  };
+}