work

common/util/array.nix

@@ -0,0 +1,11 @@
+{ lib, ... }:
+{
+  array = rec {
+    popHead = list: lib.lists.ifilter0 (index: _element: index != 0) list;
+    popTail = list: lib.lists.ifilter0 (index: _element: index - 1 != length list) list;
+    head = list: at 0 list;
+    tail = list: at (length list - 1) list;
+    at = index: list: builtins.elemAt list index;
+    length = list: builtins.length list;
+  };
+}

common/util/default.nix

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+{ lib, ... }:
+let
+  util =
+    (import ./modules.nix { }) // (import ./array.nix { }) // (import ./paths.nix { inherit lib; });
+in
+{
+  _module.args = {
+    inherit util;
+  };
+  home-manager.extraSpecialArgs = {
+    inherit util;
+  };
+}

common/util/modules.nix

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+{ ... }:
+{
+  modulesFromPath = root: modules: builtins.map (mod: root + "/" + mod) modules;
+}

common/util/paths.nix

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+{ lib, ... }:
+let
+  array = import ./array.nix { };
+in
+{
+  path = rec {
+    split = { path }: builtins.split "/" "${path}";
+    removeSuffix = suffix: path: lib.removeSuffix suffix "${path}";
+    # ====
+    basename =
+      {
+        path,
+        suffix ? "",
+      }:
+      let
+        basename = if array.length (split path) >= 2 then array.tail (split path);
+      in
+      removeSuffix suffix basename;
+    # nix doesnt support windows
+    delimiter = ":";
+    dirname =
+      path:
+      let
+        ending = basename { inherit path; };
+      in
+      removeSuffix ending path;
+  };
+}