various path stubs: re-export to reduce duplication (#5382)

Co-authored-by: hauntsaninja <>
Co-authored-by: Akuli <akuviljanen17@gmail.com>

stdlib/genericpath.pyi

@@ -1,17 +1,32 @@
+import os
 import sys
-from _typeshed import AnyPath
-from os.path import commonprefix as commonprefix
-from typing import Text
+from _typeshed import AnyPath, BytesPath, StrPath, SupportsLessThanT
+from typing import List, Sequence, Tuple, Union, overload
+from typing_extensions import Literal
 
+# All overloads can return empty string. Ideally, Literal[""] would be a valid
+# Iterable[T], so that Union[List[T], Literal[""]] could be used as a return
+# type. But because this only works when T is str, we need Sequence[T] instead.
+@overload
+def commonprefix(m: Sequence[StrPath]) -> str: ...
+@overload
+def commonprefix(m: Sequence[BytesPath]) -> Union[bytes, Literal[""]]: ...
+@overload
+def commonprefix(m: Sequence[List[SupportsLessThanT]]) -> Sequence[SupportsLessThanT]: ...
+@overload
+def commonprefix(m: Sequence[Tuple[SupportsLessThanT, ...]]) -> Sequence[SupportsLessThanT]: ...
 def exists(path: AnyPath) -> bool: ...
-def isfile(path: Text) -> bool: ...
-def isdir(s: Text) -> bool: ...
-def getsize(filename: Text) -> int: ...
-def getmtime(filename: Text) -> float: ...
-def getatime(filename: Text) -> float: ...
-def getctime(filename: Text) -> float: ...
+def getsize(filename: AnyPath) -> int: ...
+def isfile(path: AnyPath) -> bool: ...
+def isdir(s: AnyPath) -> bool: ...
+
+# These return float if os.stat_float_times() == True,
+# but int is a subclass of float.
+def getatime(filename: AnyPath) -> float: ...
+def getmtime(filename: AnyPath) -> float: ...
+def getctime(filename: AnyPath) -> float: ...
 
 if sys.version_info >= (3, 4):
-    def samestat(s1: str, s2: str) -> int: ...
-    def samefile(f1: str, f2: str) -> int: ...
-    def sameopenfile(fp1: str, fp2: str) -> int: ...
+    def samefile(f1: AnyPath, f2: AnyPath) -> bool: ...
+    def sameopenfile(fp1: int, fp2: int) -> bool: ...
+    def samestat(s1: os.stat_result, s2: os.stat_result) -> bool: ...