Add cross-platform Nix flake bootstrap

Adds a flake providing shared modules for NixOS and standalone
home-manager, a copyable NixOS host template, and the OpenSpec
tooling/change scaffolding used to plan this work.

1 files changed, 21 insertions, 0 deletions

diff --git a/lib/mkNixos.nix b/lib/mkNixos.nix
new file mode 100644
index 0000000..00f19a0
--- /dev/null
+++ b/lib/mkNixos.nix
@@ -0,0 +1,21 @@
+{ inputs }:
+{ hostname, system ? "x86_64-linux", users ? [ "tom" ], extraModules ? [ ] }:
+inputs.nixpkgs.lib.nixosSystem {
+  inherit system;
+  specialArgs = { inherit inputs; };
+  modules = [
+    ../modules/nixos/common.nix
+    ../hosts/${hostname}/configuration.nix
+    inputs.home-manager.nixosModules.home-manager
+    {
+      home-manager.useGlobalPkgs = true;
+      home-manager.useUserHomeDirectory = true;
+      home-manager.users = builtins.listToAttrs (map
+        (u: {
+          name = u;
+          value = import ../users/${u}.nix;
+        })
+        users);
+    }
+  ] ++ extraModules;
+}