From: Barney Gale <barney.gale@gmail.com>
Date: Fri, 26 May 2023 18:04:02 +0000 (+0100)
Subject: GH-104947: Make pathlib.PureWindowsPath comparisons consistent across platforms ... 
X-Git-Tag: v3.13.0a1~2006
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ad0be361c9922a918c7c3eaf83e1d8f2b019279c;p=thirdparty%2FPython%2Fcpython.git

GH-104947: Make pathlib.PureWindowsPath comparisons consistent across platforms (GH-104948)

Use `str.lower()` rather than `ntpath.normcase()` to normalize case of
Windows paths. This restores behaviour from Python 3.11.

Co-authored-by: Gregory P. Smith <greg@krypto.org>
---

diff --git a/Lib/pathlib.py b/Lib/pathlib.py
index fb78939dcc31..c8931687a3c6 100644
--- a/Lib/pathlib.py
+++ b/Lib/pathlib.py
@@ -421,7 +421,10 @@ class PurePath(os.PathLike):
         try:
             return self._str_normcase_cached
         except AttributeError:
-            self._str_normcase_cached = self._flavour.normcase(str(self))
+            if _is_case_sensitive(self._flavour):
+                self._str_normcase_cached = str(self)
+            else:
+                self._str_normcase_cached = str(self).lower()
             return self._str_normcase_cached
 
     @property
diff --git a/Lib/test/test_pathlib.py b/Lib/test/test_pathlib.py
index 8b68cdc9b7d0..ef202b751e44 100644
--- a/Lib/test/test_pathlib.py
+++ b/Lib/test/test_pathlib.py
@@ -904,6 +904,7 @@ class PureWindowsPathTest(_BasePurePathTest, unittest.TestCase):
         self.assertEqual(P('a/B'), P('A/b'))
         self.assertEqual(P('C:a/B'), P('c:A/b'))
         self.assertEqual(P('//Some/SHARE/a/B'), P('//somE/share/A/b'))
+        self.assertEqual(P('\u0130'), P('i\u0307'))
 
     def test_as_uri(self):
         P = self.cls
diff --git a/Misc/NEWS.d/next/Library/2023-05-25-22-54-20.gh-issue-104947.hi6TUr.rst b/Misc/NEWS.d/next/Library/2023-05-25-22-54-20.gh-issue-104947.hi6TUr.rst
new file mode 100644
index 000000000000..4af73d73d2a7
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-05-25-22-54-20.gh-issue-104947.hi6TUr.rst
@@ -0,0 +1,2 @@
+Make comparisons between :class:`pathlib.PureWindowsPath` objects consistent
+across Windows and Posix to match 3.11 behavior.