Inspect constructor values and contexts without unrelated derivation closures (#931)

2026-11-05 21:32:42 +00:00
parent 61881f9cda
commit 4f672d027d
3 changed files with 59 additions and 33 deletions
@@ -0,0 +1,34 @@
+# Read actual constructor attributes as comparison data. Their values AND
+# dependency contexts remain visible; none is substituted for a build input.
+derivation:
+let
+  fields = [
+    "name"
+    "system"
+    "src"
+    "stdenv"
+    "nativeBuildInputs"
+    "buildInputs"
+    "propagatedBuildInputs"
+    "propagatedNativeBuildInputs"
+    "configurePhase"
+    "buildPhase"
+    "checkPhase"
+    "installPhase"
+    "doCheck"
+    "strictDeps"
+    "outputs"
+    "__structuredAttrs"
+  ];
+  selected = builtins.intersectAttrs (builtins.listToAttrs (
+    map (name: {
+      inherit name;
+      value = null;
+    }) fields
+  )) derivation;
+in
+builtins.mapAttrs (_: value: {
+  type = builtins.typeOf value;
+  value = builtins.unsafeDiscardStringContext (toString value);
+  context = builtins.getContext (toString value);
+}) selected