refreactor(py bindings): use modern setuptools, allow build_ext (copy files), disable purelib

Author: K0lb3

bindings/python/pyproject.toml

@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=42", "wheel"]
+requires = ["setuptools>=70"]
 build-backend = "setuptools.build_meta"
 
 [project]

bindings/python/setup.py

@@ -3,11 +3,9 @@
 from typing import Tuple
 
 from setuptools import setup
-
-try:
-    from setuptools.command.bdist_wheel import bdist_wheel
-except ImportError:
-    from wheel.bdist_wheel import bdist_wheel  # type: ignore
+from setuptools.command.bdist_wheel import bdist_wheel
+from setuptools.command.build_ext import build_ext
+from setuptools.dist import Distribution
 
 
 def copy_binary_files(net_rid: str):
@@ -48,12 +46,19 @@ def copy_binary_files(net_rid: str):
 
 
 class bdist_wheel_abi3(bdist_wheel):
-    def finalize_options(self):
-        super().finalize_options()
+    def get_tag(self) -> Tuple[str, str, str]:
         self.root_is_pure = False
+        python, abi, plat = super().get_tag()
+        self.root_is_pure = True
+        if python.startswith("cp"):
+            # on CPython, our wheels are abi3 and compatible back to 3.7
+            return "cp36", "abi3", plat
+        return python, abi, plat
+
 
+class build_ext_c(build_ext):
     def run(self):
-        platform_tag = self.get_tag()[2]
+        platform_tag = self.plat_name.replace("-", "_")
         if platform_tag.startswith("win"):
             net_rid = BDIST_TAG_MAP_WIN[platform_tag]
         elif platform_tag.startswith("macosx"):
@@ -65,14 +70,16 @@ def run(self):
         copy_binary_files(net_rid)
         super().run()
 
-    def get_tag(self) -> Tuple[str, str, str]:
-        python, abi, plat = super().get_tag()
-        if python.startswith("cp"):
-            # on CPython, our wheels are abi3 and compatible back to 3.7
-            return "cp36", "abi3", plat
-        return python, abi, plat
+
+class UnpureDistribution(Distribution):
+    """Distribution which is not marked as pure, so that wheels are built as platform-specific"""
+
+    def is_pure(self) -> bool:
+        return False
 
 
 setup(
-    cmdclass={"bdist_wheel": bdist_wheel_abi3},
+    cmdclass={"bdist_wheel": bdist_wheel_abi3, "build_ext": build_ext_c},
+    distclass=UnpureDistribution,
+    zip_safe=False,
 )