systems -> hosts

moved functions to /lib

inputs over imports

turned each module file into a nixosModule

moved registry and $NIX_PATH pinning to /modules/pinning.nix

lib/default.nix

@@ -0,0 +1,61 @@
+inputs @ {
+  unstable,
+  self,
+  ...
+}: let
+  inherit (unstable) lib;
+
+  importAll = path:
+    map
+    (module: (import module inputs))
+    (
+      builtins.filter (lib.hasSuffix ".nix")
+      (lib.filesystem.listFilesRecursive path)
+    );
+
+  mkModules = path:
+    lib.listToAttrs (
+      map (
+        name: {
+          name = lib.removePrefix (toString path + "/") (lib.removeSuffix ".nix" (toString name));
+          value = import name inputs;
+        }
+      )
+      (
+        builtins.filter (lib.hasSuffix ".nix")
+        (lib.filesystem.listFilesRecursive path)
+      )
+    );
+in {
+  inherit importAll mkModules;
+
+  withSystem = f:
+    lib.fold lib.recursiveUpdate {}
+    (map f ["x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin"]);
+
+  mkSystems = system: names:
+    lib.genAttrs names (
+      name:
+        lib.nixosSystem {
+          inherit system;
+          modules =
+            builtins.attrValues self.nixosModules ++ importAll (self + "/hosts/" + name);
+        }
+    );
+  mkDisko = names:
+    lib.genAttrs names (
+      name: (import (self + "/hosts/" + name + "/disko.nix") inputs)
+    );
+
+  mkPkgs = pkgs: path:
+    builtins.listToAttrs (
+      map (module: {
+        name = lib.removeSuffix ".nix" (builtins.baseNameOf module);
+        value = pkgs.callPackage module {};
+      })
+      (
+        builtins.filter (lib.hasSuffix ".nix")
+        (lib.filesystem.listFilesRecursive path)
+      )
+    );
+}