Extract convenience wrapper of rmtree to setuptools._shutil for reuse

setuptools/_shutil.py

@@ -0,0 +1,41 @@
+"""Convenience layer on top of stdlib's shutil and os"""
+
+import os
+import stat
+from typing import Callable, TypeVar
+
+from .compat import py311
+
+from distutils import log
+
+try:
+    from os import chmod
+except ImportError:
+    # Jython compatibility
+    def chmod(*args: object, **kwargs: object) -> None:  # type: ignore[misc] # Mypy reuses the imported definition anyway
+        pass
+
+
+_T = TypeVar("_T")
+
+
+def attempt_chmod_verbose(path, mode):
+    log.debug("changing mode of %s to %o", path, mode)
+    try:
+        chmod(path, mode)
+    except OSError as e:
+        log.debug("chmod failed: %s", e)
+
+
+# Must match shutil._OnExcCallback
+def _auto_chmod(func: Callable[..., _T], arg: str, exc: BaseException) -> _T:
+    """shutils onexc callback to automatically call chmod for certain functions."""
+    # Only retry for scenarios known to have an issue
+    if func in [os.unlink, os.remove] and os.name == 'nt':
+        attempt_chmod_verbose(arg, stat.S_IWRITE)
+        return func(arg)
+    raise exc
+
+
+def rmtree(path, ignore_errors=False, onexc=_auto_chmod):
+    return py311.shutil_rmtree(path, ignore_errors, onexc)

setuptools/command/easy_install.py

@@ -34,7 +34,7 @@
 from collections.abc import Iterable
 from glob import glob
 from sysconfig import get_path
-from typing import TYPE_CHECKING, Callable, NoReturn, TypedDict, TypeVar
+from typing import TYPE_CHECKING, NoReturn, TypedDict
 
 from jaraco.text import yield_lines
 
@@ -63,7 +63,8 @@
 from setuptools.wheel import Wheel
 
 from .._path import ensure_directory
-from ..compat import py39, py311, py312
+from .._shutil import attempt_chmod_verbose as chmod, rmtree as _rmtree
+from ..compat import py39, py312
 
 from distutils import dir_util, log
 from distutils.command import install
@@ -89,8 +90,6 @@
     'get_exe_prefixes',
 ]
 
-_T = TypeVar("_T")
-
 
 def is_64bit():
     return struct.calcsize("P") == 8
@@ -1789,16 +1788,6 @@ def _first_line_re():
     return re.compile(first_line_re.pattern.decode())
 
 
-# Must match shutil._OnExcCallback
-def auto_chmod(func: Callable[..., _T], arg: str, exc: BaseException) -> _T:
-    """shutils onexc callback to automatically call chmod for certain functions."""
-    # Only retry for scenarios known to have an issue
-    if func in [os.unlink, os.remove] and os.name == 'nt':
-        chmod(arg, stat.S_IWRITE)
-        return func(arg)
-    raise exc
-
-
 def update_dist_caches(dist_path, fix_zipimporter_caches):
     """
     Fix any globally cached `dist_path` related data
@@ -2021,24 +2010,6 @@ def is_python_script(script_text, filename):
     return False  # Not any Python I can recognize
 
 
-try:
-    from os import (
-        chmod as _chmod,  # pyright: ignore[reportAssignmentType] # Losing type-safety w/ pyright, but that's ok
-    )
-except ImportError:
-    # Jython compatibility
-    def _chmod(*args: object, **kwargs: object) -> None:  # type: ignore[misc] # Mypy reuses the imported definition anyway
-        pass
-
-
-def chmod(path, mode):
-    log.debug("changing mode of %s to %o", path, mode)
-    try:
-        _chmod(path, mode)
-    except OSError as e:
-        log.debug("chmod failed: %s", e)
-
-
 class _SplitArgs(TypedDict, total=False):
     comments: bool
     posix: bool
@@ -2350,10 +2321,6 @@ def load_launcher_manifest(name):
     return manifest.decode('utf-8') % vars()
 
 
-def _rmtree(path, ignore_errors: bool = False, onexc=auto_chmod):
-    return py311.shutil_rmtree(path, ignore_errors, onexc)
-
-
 def current_umask():
     tmp = os.umask(0o022)
     os.umask(tmp)