packages/build-support/drv-parts: allow passing pyproject.toml to buildPythonPackage

packages/build-support/drv-parts/backends/buildPythonPackage/implementation.nix

@@ -9,9 +9,19 @@ let
     "flit"
     "wheel"
   ];
+
+  hasPyproject = config.format == "pyproject" && config.pyprojectToml != null;
+
+  pyproject = if hasPyproject then
+    lib.importTOML config.pyprojectToml
+  else
+    null;
 in
 
 {
+  pname = lib.mkIf hasPyproject (lib.mkDefault pyproject.tool.poetry.name);
+  version = lib.mkIf hasPyproject (lib.mkDefault pyproject.tool.poetry.version);
+
   deps = { pkgs, python3Packages, ... }: {
     inherit (python3Packages)
       python

packages/build-support/drv-parts/backends/buildPythonPackage/interface.nix

@@ -1,4 +1,4 @@
-{ lib, ... }:
+{ config, lib, ... }:
 with lib;
 
 let
@@ -19,6 +19,15 @@ in
         "wheel"
         "other"
       ];
+      default = if config.pyprojectToml != null then "pyproject" else "setuptools";
+      defaultText = ''
+        "pyproject" if pyprojectToml is set, otherwise "setuptools".
+      '';
+    };
+    pyprojectToml = mkOption {
+      description = "pyproject.toml file used for extracting package metadata";
+      type = with types; nullOr path;
+      default = null;
     };
     catchConflicts = flag true "If true, abort package build if a package name appears more than once in dependency tree.";
     dontWrapPythonPrograms = flag false "Skip wrapping of Python programs.";