Fix matching absolute paths

CHANGES.rst

@@ -2,12 +2,15 @@
 Change History
 ==============
 
-0.8.2 (TDB)
+0.9.0 (TDB)
 -----------
 
 - `Issue #45`_: Fix for duplicate leading double-asterisk, and edge cases.
+- `Issue #46`_: Fix matching absolute paths.
+- API change: `util.normalize_files()` now returns a `Dict[str, List[pathlike]]` instead of a `Dict[str, pathlike]`.
 
 .. _`Issue #45`: https://github.com/cpburnz/python-path-specification/pull/45
+.. _`Issue #46`: https://github.com/cpburnz/python-path-specification/issues/46
 
 
 0.8.1 (2020-11-07)

pathspec/pathspec.py

@@ -155,8 +155,9 @@ def match_files(self, files, separators=None):
 
 		file_map = util.normalize_files(files, separators=separators)
 		matched_files = util.match_files(self.patterns, iterkeys(file_map))
-		for path in matched_files:
-			yield file_map[path]
+		for norm_file in matched_files:
+			for orig_file in file_map[norm_file]:
+				yield orig_file
 
 	def match_tree_entries(self, root, on_error=None, follow_links=None):
 		"""

pathspec/tests/test_pathspec.py

@@ -13,6 +13,52 @@ class PathSpecTest(unittest.TestCase):
 	The ``PathSpecTest`` class tests the ``PathSpec`` class.
 	"""
 
+	def test_01_absolute_dir_paths_1(self):
+		"""
+		Tests that absolute paths will be properly normalized and matched.
+		"""
+		spec = pathspec.PathSpec.from_lines('gitwildmatch', [
+			'foo',
+		])
+		results = set(spec.match_files([
+			'/a.py',
+			'/foo/a.py',
+			'/x/a.py',
+			'/x/foo/a.py',
+			'a.py',
+			'foo/a.py',
+			'x/a.py',
+			'x/foo/a.py',
+		]))
+		self.assertEqual(results, {
+			'/foo/a.py',
+			'/x/foo/a.py',
+			'foo/a.py',
+			'x/foo/a.py',
+		})
+
+	def test_01_absolute_dir_paths_2(self):
+		"""
+		Tests that absolute paths will be properly normalized and matched.
+		"""
+		spec = pathspec.PathSpec.from_lines('gitwildmatch', [
+			'/foo',
+		])
+		results = set(spec.match_files([
+			'/a.py',
+			'/foo/a.py',
+			'/x/a.py',
+			'/x/foo/a.py',
+			'a.py',
+			'foo/a.py',
+			'x/a.py',
+			'x/foo/a.py',
+		]))
+		self.assertEqual(results, {
+			'/foo/a.py',
+			'foo/a.py',
+		})
+
 	def test_01_current_dir_paths(self):
 		"""
 		Tests that paths referencing the current directory will be properly

pathspec/util.py

@@ -300,7 +300,8 @@ def _normalize_entries(entries, separators=None):
 
 def normalize_file(file, separators=None):
 	"""
-	Normalizes the file path to use the POSIX path separator (i.e., ``'/'``).
+	Normalizes the file path to use the POSIX path separator (i.e.,
+	``'/'``), and make the paths relative (remove leading ``'/'``).
 
 	*file* (:class:`str` or :class:`pathlib.PurePath`) is the file path.
 
@@ -323,8 +324,12 @@ def normalize_file(file, separators=None):
 	for sep in separators:
 		norm_file = norm_file.replace(sep, posixpath.sep)
 
-	# Remove current directory prefix.
-	if norm_file.startswith('./'):
+	if norm_file.startswith('/'):
+		# Make path relative.
+		norm_file = norm_file[1:]
+
+	elif norm_file.startswith('./'):
+		# Remove current directory prefix.
 		norm_file = norm_file[2:]
 
 	return norm_file
@@ -341,12 +346,18 @@ def normalize_files(files, separators=None):
 	:data:`None`) optionally contains the path separators to normalize.
 	See :func:`normalize_file` for more information.
 
-	Returns a :class:`dict` mapping the each normalized file path (:class:`str`)
-	to the original file path (:class:`str`)
+	Returns a :class:`dict` mapping the each normalized file path
+	(:class:`str`) to the original file paths (:class:`list` of
+	:class:`str`).
 	"""
 	norm_files = {}
 	for path in files:
-		norm_files[normalize_file(path, separators=separators)] = path
+		norm_file = normalize_file(path, separators=separators)
+		if norm_file in norm_files:
+			norm_files[norm_file].append(path)
+		else:
+			norm_files[norm_file] = [path]
+
 	return norm_files