Initial commit

flake/den/nix/den-brackets.nix

@@ -0,0 +1,55 @@
+# __findFile implementation to resolve deep aspects.
+# inspired by https://fzakaria.com/2025/08/10/angle-brackets-in-a-nix-flake-world
+{
+  lib,
+  config,
+  ...
+}:
+_nixPath: name:
+let
+
+  findAspect =
+    path:
+    let
+      head = lib.head path;
+      tail = lib.tail path;
+
+      notFound = "Aspect not found: ${lib.concatStringsSep "." path}";
+
+      headIsDen = head == "den";
+      readFromDen = lib.getAttrFromPath ([ "den" ] ++ tail) config;
+
+      headIsAspect = builtins.hasAttr head config.den.aspects;
+      aspectsPath = [
+        "den"
+        "aspects"
+      ] ++ path;
+      readFromAspects = lib.getAttrFromPath aspectsPath config;
+
+      headIsDenful = lib.hasAttrByPath [ "ful" head ] config.den;
+      denfulTail = if lib.head tail == "provides" then lib.tail tail else tail;
+      denfulPath = [
+        "den"
+        "ful"
+        head
+      ] ++ denfulTail;
+      readFromDenful = lib.getAttrFromPath denfulPath config;
+
+      found =
+        if headIsDen then
+          readFromDen
+        else if headIsAspect then
+          readFromAspects
+        else if headIsDenful then
+          readFromDenful
+        else
+          throw notFound;
+    in
+    found;
+
+in
+lib.pipe name [
+  (lib.strings.replaceStrings [ "/" ] [ ".provides." ])
+  (lib.strings.splitString ".")
+  (findAspect)
+]