GH-127381: pathlib ABCs: remove `case_sensitive` argument (#131024)

Remove the *case_sensitive* argument from `_JoinablePath.full_match()` and
`_ReadablePath.glob()`. Using a non-native case sensitivity forces the use
of "case-pedantic" globbing, where we `iterdir()` even for non-wildcard
pattern segments. But it's hard to know when to enable this mode, as
case-sensitivity can vary by directory, so `_PathParser.normcase()` doesn't
always give the full picture. The `Path.glob()` implementation is forced to
make an educated guess, but we can avoid the issue in the ABCs by dropping
the *case_sensitive* argument.

(I probably shouldn't have added these arguments in `PurePath` and `Path`
in the first place!)

Also drop support for `_ReadablePath.glob(recurse_symlinks=False)`, which
makes recursive globbing much slower.

3 files changed, 19 insertions, 17 deletions

diff --git a/Lib/test/test_pathlib/test_join.py b/Lib/test/test_pathlib/test_join.py
index 93fd1e6488c..03a3ecfd248 100644
--- a/Lib/test/test_pathlib/test_join.py
+++ b/Lib/test/test_pathlib/test_join.py
@@ -130,11 +130,6 @@ class JoinTestBase:
         self.assertFalse(P('a/b/c.py').full_match('**/a/b/c./**'))
         self.assertFalse(P('a/b/c.py').full_match('/a/b/c.py/**'))
         self.assertFalse(P('a/b/c.py').full_match('/**/a/b/c.py'))
-        # Case-sensitive flag
-        self.assertFalse(P('A.py').full_match('a.PY', case_sensitive=True))
-        self.assertTrue(P('A.py').full_match('a.PY', case_sensitive=False))
-        self.assertFalse(P('c:/a/B.Py').full_match('C:/A/*.pY', case_sensitive=True))
-        self.assertTrue(P('/a/b/c.py').full_match('/A/*/*.Py', case_sensitive=False))
         # Matching against empty path
         self.assertFalse(P('').full_match('*'))
         self.assertTrue(P('').full_match('**'))
diff --git a/Lib/test/test_pathlib/test_pathlib.py b/Lib/test/test_pathlib/test_pathlib.py
index 830bfa4ca78..1996bbb65a3 100644
--- a/Lib/test/test_pathlib/test_pathlib.py
+++ b/Lib/test/test_pathlib/test_pathlib.py
@@ -433,6 +433,13 @@ class PurePathTest(test_pathlib_abc.JoinablePathTest):
         with self.assertWarns(DeprecationWarning):
             p.is_reserved()
 
+    def test_full_match_case_sensitive(self):
+        P = self.cls
+        self.assertFalse(P('A.py').full_match('a.PY', case_sensitive=True))
+        self.assertTrue(P('A.py').full_match('a.PY', case_sensitive=False))
+        self.assertFalse(P('c:/a/B.Py').full_match('C:/A/*.pY', case_sensitive=True))
+        self.assertTrue(P('/a/b/c.py').full_match('/A/*/*.Py', case_sensitive=False))
+
     def test_match_empty(self):
         P = self.cls
         self.assertRaises(ValueError, P('a').match, '')
@@ -2737,6 +2744,18 @@ class PathTest(test_pathlib_abc.RWPathTest, PurePathTest):
         self.assertEqual(expect, set(p.glob(P(pattern))))
         self.assertEqual(expect, set(p.glob(FakePath(pattern))))
 
+    def test_glob_case_sensitive(self):
+        P = self.cls
+        def _check(path, pattern, case_sensitive, expected):
+            actual = {str(q) for q in path.glob(pattern, case_sensitive=case_sensitive)}
+            expected = {str(P(self.base, q)) for q in expected}
+            self.assertEqual(actual, expected)
+        path = P(self.base)
+        _check(path, "DIRB/FILE*", True, [])
+        _check(path, "DIRB/FILE*", False, ["dirB/fileB"])
+        _check(path, "dirb/file*", True, [])
+        _check(path, "dirb/file*", False, ["dirB/fileB"])
+
     @needs_symlinks
     def test_glob_dot(self):
         P = self.cls
diff --git a/Lib/test/test_pathlib/test_pathlib_abc.py b/Lib/test/test_pathlib/test_pathlib_abc.py
index c6038d61b89..1b9db475138 100644
--- a/Lib/test/test_pathlib/test_pathlib_abc.py
+++ b/Lib/test/test_pathlib/test_pathlib_abc.py
@@ -709,18 +709,6 @@ class ReadablePathTest(JoinablePathTest):
         p = P(self.base)
         self.assertEqual(list(p.glob("")), [p.joinpath("")])
 
-    def test_glob_case_sensitive(self):
-        P = self.cls
-        def _check(path, pattern, case_sensitive, expected):
-            actual = {str(q) for q in path.glob(pattern, case_sensitive=case_sensitive)}
-            expected = {str(P(self.base, q)) for q in expected}
-            self.assertEqual(actual, expected)
-        path = P(self.base)
-        _check(path, "DIRB/FILE*", True, [])
-        _check(path, "DIRB/FILE*", False, ["dirB/fileB"])
-        _check(path, "dirb/file*", True, [])
-        _check(path, "dirb/file*", False, ["dirB/fileB"])
-
     def test_info_exists(self):
         p = self.cls(self.base)
         self.assertTrue(p.info.exists())