GH-79634: Accept path-like objects as pathlib glob patterns. (#114017)

Allow `os.PathLike` objects to be passed as patterns to `pathlib.Path.glob()` and `rglob()`. (It's already possible to use them in `PurePath.match()`)

While we're in the area:

- Allow empty glob patterns in `PathBase` (but not `Path`)
- Speed up globbing in `PathBase` by generating paths with trailing slashes only as a final step, rather than for every intermediate directory.
- Simplify and speed up handling of rare patterns involving both `**` and `..` segments.

1 files changed, 23 insertions, 0 deletions

diff --git a/Lib/test/test_pathlib/test_pathlib.py b/Lib/test/test_pathlib/test_pathlib.py
index 61d7939..bdbe923 100644
--- a/Lib/test/test_pathlib/test_pathlib.py
+++ b/Lib/test/test_pathlib/test_pathlib.py
@@ -1818,6 +1818,13 @@ class PathTest(test_pathlib_abc.DummyPathTest, PurePathTest):
             list(base.walk())
             list(base.walk(top_down=False))
 
+    def test_glob_empty_pattern(self):
+        p = self.cls('')
+        with self.assertRaisesRegex(ValueError, 'Unacceptable pattern'):
+            list(p.glob(''))
+        with self.assertRaisesRegex(ValueError, 'Unacceptable pattern'):
+            list(p.glob('.'))
+
     def test_glob_many_open_files(self):
         depth = 30
         P = self.cls
@@ -1860,6 +1867,22 @@ class PathTest(test_pathlib_abc.DummyPathTest, PurePathTest):
         with self.assertWarns(FutureWarning):
             p.rglob('*/**')
 
+    def test_glob_pathlike(self):
+        P = self.cls
+        p = P(self.base)
+        pattern = "dir*/file*"
+        expect = {p / "dirB/fileB", p / "dirC/fileC"}
+        self.assertEqual(expect, set(p.glob(P(pattern))))
+        self.assertEqual(expect, set(p.glob(FakePath(pattern))))
+
+    def test_rglob_pathlike(self):
+        P = self.cls
+        p = P(self.base, "dirC")
+        pattern = "**/file*"
+        expect = {p / "fileC", p / "dirD/fileD"}
+        self.assertEqual(expect, set(p.rglob(P(pattern))))
+        self.assertEqual(expect, set(p.rglob(FakePath(pattern))))
+
 
 @only_posix
 class PosixPathTest(PathTest, PurePosixPathTest):