Annotate pathlib.Path.{owner,group,is_mount} on windows (#13613)

Author: jorenham

stdlib/@tests/stubtest_allowlists/win32-py310.txt

@@ -44,16 +44,6 @@ xml.parsers.expat.XMLParserType.SetReparseDeferralEnabled
 xml.sax.expatreader.ExpatParser.flush
 
 
-# =============================================================
-# Allowlist entries that cannot or should not be fixed; <= 3.11
-# =============================================================
-
-# pathlib methods that exist on Windows, but always raise NotImplementedError,
-# so are omitted from the stub
-pathlib.Path.is_mount
-pathlib.WindowsPath.is_mount
-
-
 # =============================================================
 # Allowlist entries that cannot or should not be fixed; <= 3.12
 # =============================================================
@@ -63,7 +53,3 @@ crypt
 nis
 ossaudiodev
 spwd
-
-# pathlib functions that rely on modules that don't exist on Windows
-pathlib.Path.owner
-pathlib.Path.group

stdlib/@tests/stubtest_allowlists/win32-py311.txt

@@ -11,16 +11,6 @@ email.utils.getaddresses
 email.utils.parseaddr
 
 
-# =============================================================
-# Allowlist entries that cannot or should not be fixed; <= 3.11
-# =============================================================
-
-# pathlib methods that exist on Windows, but always raise NotImplementedError,
-# so are omitted from the stub
-pathlib.Path.is_mount
-pathlib.WindowsPath.is_mount
-
-
 # =============================================================
 # Allowlist entries that cannot or should not be fixed; <= 3.12
 # =============================================================
@@ -30,7 +20,3 @@ crypt
 nis
 ossaudiodev
 spwd
-
-# pathlib functions that rely on modules that don't exist on Windows
-pathlib.Path.owner
-pathlib.Path.group

stdlib/@tests/stubtest_allowlists/win32-py312.txt

@@ -25,7 +25,3 @@ crypt
 nis
 ossaudiodev
 spwd
-
-# pathlib functions that rely on modules that don't exist on Windows
-pathlib.Path.owner
-pathlib.Path.group

stdlib/@tests/stubtest_allowlists/win32-py39.txt

@@ -53,16 +53,6 @@ xml.parsers.expat.XMLParserType.SetReparseDeferralEnabled
 xml.sax.expatreader.ExpatParser.flush
 
 
-# =============================================================
-# Allowlist entries that cannot or should not be fixed; <= 3.11
-# =============================================================
-
-# pathlib methods that exist on Windows, but always raise NotImplementedError,
-# so are omitted from the stub
-pathlib.Path.is_mount
-pathlib.WindowsPath.is_mount
-
-
 # =============================================================
 # Allowlist entries that cannot or should not be fixed; <= 3.12
 # =============================================================
@@ -72,7 +62,3 @@ crypt
 nis
 ossaudiodev
 spwd
-
-# pathlib functions that rely on modules that don't exist on Windows
-pathlib.Path.owner
-pathlib.Path.group

stdlib/pathlib.pyi

@@ -16,7 +16,7 @@ from io import BufferedRandom, BufferedReader, BufferedWriter, FileIO, TextIOWra
 from os import PathLike, stat_result
 from types import TracebackType
 from typing import IO, Any, BinaryIO, ClassVar, Literal, overload
-from typing_extensions import Self, deprecated
+from typing_extensions import Never, Self, deprecated
 
 if sys.version_info >= (3, 9):
     from types import GenericAlias
@@ -226,9 +226,13 @@ class Path(PurePath):
     def open(
         self, mode: str, buffering: int = -1, encoding: str | None = None, errors: str | None = None, newline: str | None = None
     ) -> IO[Any]: ...
-    if sys.platform != "win32":
-        # These methods do "exist" on Windows, but they always raise NotImplementedError,
-        # so it's safer to pretend they don't exist
+
+    # These methods do "exist" on Windows on <3.13, but they always raise NotImplementedError.
+    if sys.platform == "win32":
+        if sys.version_info < (3, 13):
+            def owner(self: Never) -> str: ...  # type: ignore[misc]
+            def group(self: Never) -> str: ...  # type: ignore[misc]
+    else:
         if sys.version_info >= (3, 13):
             def owner(self, *, follow_symlinks: bool = True) -> str: ...
             def group(self, *, follow_symlinks: bool = True) -> str: ...
@@ -238,7 +242,9 @@ class Path(PurePath):
 
     # This method does "exist" on Windows on <3.12, but always raises NotImplementedError
     # On py312+, it works properly on Windows, as with all other platforms
-    if sys.platform != "win32" or sys.version_info >= (3, 12):
+    if sys.platform == "win32" and sys.version_info < (3, 12):
+        def is_mount(self: Never) -> bool: ...  # type: ignore[misc]
+    else:
         def is_mount(self) -> bool: ...
 
     if sys.version_info >= (3, 9):