python310Packages.vapoursynth: add a withPlugins to extend it (#190660)

pkgs/development/libraries/vapoursynth/plugin-interface.nix

@@ -42,6 +42,7 @@ runCommand "${vapoursynth.name}-with-plugins" {
   nativeBuildInputs = [ makeWrapper ];
   passthru = {
     inherit python3;
+    inherit (vapoursynth) src version;
     withPlugins = plugins': withPlugins (plugins ++ plugins');
   };
 } ''

pkgs/development/python-modules/vapoursynth/default.nix

@@ -1,4 +1,4 @@
-{ vapoursynth, cython, buildPythonPackage, unittestCheckHook }:
+{ vapoursynth, cython, buildPythonPackage, unittestCheckHook, python }:
 
 buildPythonPackage {
   pname = "vapoursynth";
@@ -19,6 +19,13 @@ buildPythonPackage {
 
   unittestFlagsArray = [ "-s" "$src/test" "-p" "'*test.py'" ];
 
+  passthru = {
+    withPlugins = plugins:
+      python.pkgs.vapoursynth.override {
+        vapoursynth = vapoursynth.withPlugins plugins;
+      };
+  };
+
   inherit (vapoursynth) meta;
 }