pythonGH-79634: Accept path-like objects as pathlib glob patterns.

Allow `os.PathLike` objects to be passed as patterns to
`pathlib.Path.glob()` and `rglob()`.

Doc/library/pathlib.rst

@@ -1020,6 +1020,9 @@ call fails (for example because the path doesn't exist).
       future Python release, patterns with this ending will match both files
       and directories. Add a trailing slash to match only directories.
 
+   .. versionchanged:: 3.13
+      The *pattern* parameter accepts a :term:`path-like object`.
+
 .. method:: Path.group(*, follow_symlinks=True)
 
    Return the name of the group owning the file. :exc:`KeyError` is raised
@@ -1482,6 +1485,9 @@ call fails (for example because the path doesn't exist).
    .. versionchanged:: 3.13
       The *follow_symlinks* parameter was added.
 
+   .. versionchanged:: 3.13
+      The *pattern* parameter accepts a :term:`path-like object`.
+
 .. method:: Path.rmdir()
 
    Remove this directory.  The directory must be empty.

Lib/pathlib/__init__.py

@@ -407,6 +407,23 @@ def as_uri(self):
         from urllib.parse import quote_from_bytes
         return prefix + quote_from_bytes(os.fsencode(path))
 
+    @property
+    def _pattern_parts(self):
+        """List of path components, to be used with patterns in glob()."""
+        parts = self._tail.copy()
+        if self._raw_path.endswith('**'):
+            # GH-70303: '**' only matches directories. Add trailing slash.
+            warnings.warn(
+                "Pattern ending '**' will match files and directories in a "
+                "future Python release. Add a trailing slash to match only "
+                "directories and remove this warning.",
+                FutureWarning, 4)
+            parts.append('')
+        elif self._raw_path[-1] in (self.pathmod.sep, self.pathmod.altsep):
+            # GH-65238: pathlib doesn't preserve trailing slash. Add it back.
+            parts.append('')
+        return parts
+
 
 # Subclassing os.PathLike makes isinstance() checks slower,
 # which in turn makes Path construction slower. Register instead!
@@ -551,14 +568,8 @@ def glob(self, pattern, *, case_sensitive=None, follow_symlinks=None):
         kind, including directories) matching the given relative pattern.
         """
         sys.audit("pathlib.Path.glob", self, pattern)
-        if pattern.endswith('**'):
-            # GH-70303: '**' only matches directories. Add trailing slash.
-            warnings.warn(
-                "Pattern ending '**' will match files and directories in a "
-                "future Python release. Add a trailing slash to match only "
-                "directories and remove this warning.",
-                FutureWarning, 2)
-            pattern = f'{pattern}/'
+        if not isinstance(pattern, PurePath):
+            pattern = self.with_segments(pattern)
         return _abc.PathBase.glob(
             self, pattern, case_sensitive=case_sensitive, follow_symlinks=follow_symlinks)
 
@@ -568,15 +579,9 @@ def rglob(self, pattern, *, case_sensitive=None, follow_symlinks=None):
         this subtree.
         """
         sys.audit("pathlib.Path.rglob", self, pattern)
-        if pattern.endswith('**'):
-            # GH-70303: '**' only matches directories. Add trailing slash.
-            warnings.warn(
-                "Pattern ending '**' will match files and directories in a "
-                "future Python release. Add a trailing slash to match only "
-                "directories and remove this warning.",
-                FutureWarning, 2)
-            pattern = f'{pattern}/'
-        pattern = f'**/{pattern}'
+        if not isinstance(pattern, PurePath):
+            pattern = self.with_segments(pattern)
+        pattern = '**' / pattern
         return _abc.PathBase.glob(
             self, pattern, case_sensitive=case_sensitive, follow_symlinks=follow_symlinks)
 

Lib/pathlib/_abc.py

@@ -406,6 +406,11 @@ def is_reserved(self):
         name = self.name.partition('.')[0].partition(':')[0].rstrip(' ')
         return name.upper() in _WIN_RESERVED_NAMES
 
+    @property
+    def _pattern_parts(self):
+        """List of path components, to be used with patterns in glob()."""
+        return list(self.parts)
+
     def match(self, path_pattern, *, case_sensitive=None):
         """
         Return True if this path matches the given pattern.
@@ -415,11 +420,10 @@ def match(self, path_pattern, *, case_sensitive=None):
         if case_sensitive is None:
             case_sensitive = _is_case_sensitive(self.pathmod)
         sep = path_pattern.pathmod.sep
-        pattern_str = str(path_pattern)
         if path_pattern.anchor:
-            pass
+            pattern_str = str(path_pattern)
         elif path_pattern.parts:
-            pattern_str = f'**{sep}{pattern_str}'
+            pattern_str = str('**' / path_pattern)
         else:
             raise ValueError("empty pattern")
         match = _compile_pattern(pattern_str, sep, case_sensitive)
@@ -706,16 +710,14 @@ def glob(self, pattern, *, case_sensitive=None, follow_symlinks=None):
         """Iterate over this subtree and yield all existing files (of any
         kind, including directories) matching the given relative pattern.
         """
-        path_pattern = self.with_segments(pattern)
-        if path_pattern.anchor:
+        if not isinstance(pattern, PurePathBase):
+            pattern = self.with_segments(pattern)
+        if pattern.anchor:
             raise NotImplementedError("Non-relative patterns are unsupported")
-        elif not path_pattern.parts:
+        elif not pattern.parts:
             raise ValueError("Unacceptable pattern: {!r}".format(pattern))
 
-        pattern_parts = list(path_pattern.parts)
-        if not self.pathmod.basename(pattern):
-            # GH-65238: pathlib doesn't preserve trailing slash. Add it back.
-            pattern_parts.append('')
+        pattern_parts = pattern._pattern_parts
 
         if case_sensitive is None:
             # TODO: evaluate case-sensitivity of each directory in _select_children().
@@ -752,7 +754,7 @@ def glob(self, pattern, *, case_sensitive=None, follow_symlinks=None):
 
                     # Filter out paths that don't match pattern.
                     prefix_len = len(str(self._make_child_relpath('_'))) - 1
-                    match = _compile_pattern(str(path_pattern), sep, case_sensitive)
+                    match = _compile_pattern(str(pattern), sep, case_sensitive)
                     paths = (path for path in paths if match(str(path), prefix_len))
                     return paths
 
@@ -775,8 +777,10 @@ def rglob(self, pattern, *, case_sensitive=None, follow_symlinks=None):
         directories) matching the given relative pattern, anywhere in
         this subtree.
         """
-        return self.glob(
-            f'**/{pattern}', case_sensitive=case_sensitive, follow_symlinks=follow_symlinks)
+        if not isinstance(pattern, PurePathBase):
+            pattern = self.with_segments(pattern)
+        pattern = '**' / pattern
+        return self.glob(pattern, case_sensitive=case_sensitive, follow_symlinks=follow_symlinks)
 
     def walk(self, top_down=True, on_error=None, follow_symlinks=False):
         """Walk the directory tree from this directory, similar to os.walk()."""

Lib/test/test_pathlib/test_pathlib.py

@@ -1859,6 +1859,22 @@ def test_glob_recursive_no_trailing_slash(self):
         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):

Misc/NEWS.d/next/Library/2024-01-12-17-32-36.gh-issue-79634.uTSTRI.rst

@@ -0,0 +1,2 @@
+Accept :term:`path-like objects <path-like object>` as patterns in
+:meth:`pathlib.Path.glob` and :meth:`~pathlib.Path.rglob`.