mk-python-derivation: Add dependencies & optional-dependencies arguments

Since https://github.com/NixOS/nixpkgs/pull/161835 we've had the
concept of `passthru.optional-dependencies` for Python optional deps.

Having to explicitly put optional-dependencies in the passthru attrset
is a bit strange API-wise, even though it semantically makes sense.

This change unifies the handling of non-optional & optional Python
dependencies using the names established from PEP-621 (standardized pyproject.toml project metadata).

pkgs/development/interpreters/python/mk-python-derivation.nix

@@ -45,6 +45,11 @@
 # C can import package A propagated by B
 , propagatedBuildInputs ? []
 
+# Python module dependencies.
+# These are named after PEP-621.
+, dependencies ? []
+, optional-dependencies ? {}
+
 # DEPRECATED: use propagatedBuildInputs
 , pythonPath ? []
 
@@ -97,8 +102,6 @@
 
 , meta ? {}
 
-, passthru ? {}
-
 , doCheck ? config.doCheckByDefault or false
 
 , disabledTestPaths ? []
@@ -193,10 +196,25 @@ let
     "setuptools" "wheel"
   ];
 
+  passthru =
+    attrs.passthru or { }
+    // {
+      updateScript = let
+        filename = builtins.head (lib.splitString ":" self.meta.position);
+      in attrs.passthru.updateScript or [ update-python-libraries filename ];
+    }
+    // lib.optionalAttrs (dependencies != []) {
+      inherit dependencies;
+    }
+    // lib.optionalAttrs (optional-dependencies != {}) {
+      inherit optional-dependencies;
+    };
+
   # Keep extra attributes from `attrs`, e.g., `patchPhase', etc.
   self = toPythonModule (stdenv.mkDerivation ((builtins.removeAttrs attrs [
     "disabled" "checkPhase" "checkInputs" "nativeCheckInputs" "doCheck" "doInstallCheck" "dontWrapPythonPrograms" "catchConflicts" "pyproject" "format"
     "disabledTestPaths" "outputs" "stdenv"
+    "dependencies" "optional-dependencies"
   ]) // {
 
     name = namePrefix + name_;
@@ -260,7 +278,7 @@ let
 
     buildInputs = validatePythonMatches "buildInputs" (buildInputs ++ pythonPath);
 
-    propagatedBuildInputs = validatePythonMatches "propagatedBuildInputs" (propagatedBuildInputs ++ [
+    propagatedBuildInputs = validatePythonMatches "propagatedBuildInputs" (propagatedBuildInputs ++ dependencies ++ [
       # we propagate python even for packages transformed with 'toPythonApplication'
       # this pollutes the PATH but avoids rebuilds
       # see https://github.com/NixOS/nixpkgs/issues/170887 for more context
@@ -292,6 +310,8 @@ let
 
     outputs = outputs ++ lib.optional withDistOutput "dist";
 
+    inherit passthru;
+
     meta = {
       # default to python's platforms
       platforms = python.meta.platforms;
@@ -305,13 +325,7 @@ let
       disabledTestPaths = lib.escapeShellArgs disabledTestPaths;
   }));
 
-  passthru.updateScript = let
-      filename = builtins.head (lib.splitString ":" self.meta.position);
-    in attrs.passthru.updateScript or [ update-python-libraries filename ];
-in
-  if disabled then
-    throw "${name} not supported for interpreter ${python.executable}"
-else
-  self.overrideAttrs (attrs: {
-    passthru = lib.recursiveUpdate passthru attrs.passthru;
-  })
+in lib.extendDerivation
+  (disabled -> throw "${name} not supported for interpreter ${python.executable}")
+  passthru
+  self