1 files changed, 75 insertions, 0 deletions
diff --git a/lib/default.nix b/lib/default.nix
new file mode 100644
index 0000000..a5f3e17
--- /dev/null
+++ b/lib/default.nix
@@ -0,0 +1,75 @@
+{ sources ? import ../npins
+, pkgs ? import sources.nixpkgs {}
+}:
+let
+  inherit (pkgs) lib;
+
+  eval = configuration:
+    let
+      self =
+        lib.evalModules {
+          modules = [
+            configuration
+            {
+              options = {
+                machines = lib.mkOption {
+                  type = lib.types.attrsOf lib.types.raw;
+                  default = {};
+                };
+                outputs = lib.mkOption {
+                  type = lib.types.attrsOf lib.types.raw;
+                  default = {};
+                };
+              };
+              config = {
+                outputs.machines = lib.mapAttrs (name: configuration:
+                  nixos configuration
+                ) self.config.machines;
+              };
+            }
+          ];
+          specialArgs.self = self;
+        };
+      
+      # nixos = config: lib.evalModules {
+      #   modules = [
+      #     config
+      #     {
+      #       # XXX Otherwise building manual fails
+      #       documentation.enable = false;
+
+      #       boot.loader.grub.device = "nodev";
+      #       fileSystems."/".device = "tmpfs";
+      #       nixpkgs.localSystem = "x86_64-linux";
+      #     }
+      #   ];
+      #   specialArgs.self = self;
+      # };
+
+      nixos = config: import (sources.nixpkgs + "/nixos/lib/eval-config.nix") {
+        modules = [
+          config
+          {
+            # XXX Otherwise building manual fails
+            documentation.enable = false;
+
+            boot.loader.grub.device = "nodev";
+            fileSystems."/".device = "tmpfs";
+            nixpkgs.localSystem = {
+              system = "x86_64-linux";
+            };
+          }
+        ];
+        specialArgs.self = self;
+
+        # The system is inherited from the current pkgs above.
+        # Set it to null, to remove the "legacy" entrypoint's non-hermetic default.
+        system = null;
+      };
+    in
+    self;
+
+in
+{
+  inherit eval;
+}