inventory test framework: init

Add nixos test module checks/lib/test-inventory-nix

accepts new option `inventory` and creates machines accordingly with correct imports

checks/lib/test-inventory.nix

@@ -0,0 +1,56 @@
+test:
+{ pkgs, self, ... }:
+let
+  inherit (pkgs) lib;
+  inherit (lib) mkOption flip mapAttrs;
+  inherit (lib.types) raw;
+  inherit (self.lib.inventory) buildInventory;
+  nixos-lib = import (pkgs.path + "/nixos/lib") { };
+in
+(nixos-lib.runTest (
+  { config, ... }:
+  {
+    imports = [ test ];
+    options = {
+      inventory = mkOption {
+        description = "Inventory of machines and services";
+        type = raw;
+      };
+      serviceConfigs = mkOption {
+        description = "Result of the evaluated inventory";
+        type = raw;
+        readOnly = true;
+      };
+    };
+    config = {
+      serviceConfigs = buildInventory {
+        inventory = config.inventory;
+        # TODO: make directory argument optional in buildInventory
+        directory = ./.;
+      };
+      nodes = flip mapAttrs config.serviceConfigs.machines (
+        _machineName: attrs: {
+          imports = attrs.machineImports ++ [ self.nixosModules.clanCore ];
+          clan.core.settings.directory = builtins.toString ./.;
+        }
+      );
+      hostPkgs = pkgs;
+      # speed-up evaluation
+      defaults = (
+        { config, ... }:
+        {
+          imports = [
+            ./minify.nix
+          ];
+          documentation.enable = lib.mkDefault false;
+          nix.settings.min-free = 0;
+          system.stateVersion = config.system.nixos.release;
+        }
+      );
+
+      _module.args = { inherit self; };
+      # to accept external dependencies such as disko
+      node.specialArgs.self = self;
+    };
+  }
+)).config.result