Do not import macosx_libfile from pypa/wheel

Author: abravalheri

setuptools/command/_macosx_libfile.py

@@ -1,5 +1,6 @@
 """
-IMPORTANT: DO NOT IMPORT THIS MODULE DIRECTLY.
+IMPORTANT: THIS FILE IS NOW IN "MAINTENANCE MODE".
+DO NOT IMPORT THIS MODULE DIRECTLY.
 THIS IS ONLY KEPT IN PLACE FOR BACKWARDS COMPATIBILITY WITH
 setuptools.command.bdist_wheel.
 
@@ -289,7 +290,7 @@ def read_data(struct_class: type[ctypes.Structure], lib_file: BufferedIOBase):
     return struct_class.from_buffer_copy(lib_file.read(ctypes.sizeof(struct_class)))
 
 
-def extract_macosx_min_system_version(path_to_lib: str):
+def extract_macosx_min_system_version(path_to_lib: str):  # noqa: C901
     with open(path_to_lib, "rb") as lib_file:
         BaseClass, magic_number = get_base_class_and_magic_number(lib_file, 0)
         if magic_number not in [FAT_MAGIC, FAT_MAGIC_64, MH_MAGIC, MH_MAGIC_64]:
@@ -404,7 +405,7 @@ def parse_version(version: int) -> tuple[int, int, int]:
     return x, y, z
 
 
-def calculate_macosx_platform_tag(archive_root: StrPath, platform_tag: str) -> str:
+def calculate_macosx_platform_tag(archive_root: StrPath, platform_tag: str) -> str:  # noqa: C901
     """
     Calculate proper macosx platform tag basing on files which are included to wheel
 

setuptools/command/bdist_wheel.py

@@ -60,7 +60,7 @@ def get_platform(archive_root: str | None) -> str:
     """Return our platform name 'win32', 'linux_x86_64'"""
     result = sysconfig.get_platform()
     if result.startswith("macosx") and archive_root is not None:  # pragma: no cover
-        from wheel.macosx_libfile import calculate_macosx_platform_tag
+        from ._macosx_libfile import calculate_macosx_platform_tag
 
         result = calculate_macosx_platform_tag(archive_root, result)
     elif _is_32bit_interpreter():