From dc20f20f4ec48fc7103cadb78ed3f7dae3cffee6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miro=20Hron=C4=8Dok?= <miro@hroncok.cz>
Date: Thu, 12 Jun 2025 23:36:24 +0200
Subject: [PATCH] Adjust path_to_url et al. to produce the same results on
 Python 3.14+

See https://github.com/python/cpython/issues/125974
and https://github.com/pypa/pip/pull/13138#issuecomment-2567715303
and https://discuss.python.org/t/pathname2url-changes-in-python-3-14-breaking-pip-tests/97091
---
 news/13423.bugfix.rst            | 1 +
 src/pip/_internal/models/link.py | 7 ++++++-
 src/pip/_internal/utils/urls.py  | 2 +-
 tests/unit/test_urls.py          | 2 +-
 4 files changed, 9 insertions(+), 3 deletions(-)
 create mode 100644 news/13423.bugfix.rst

diff --git a/news/13423.bugfix.rst b/news/13423.bugfix.rst
new file mode 100644
index 00000000000..75125d922b0
--- /dev/null
+++ b/news/13423.bugfix.rst
@@ -0,0 +1 @@
+Fix remaining test failures in Python 3.14 by adjusting ``path_to_url`` and similar functions.
diff --git a/src/pip/_internal/models/link.py b/src/pip/_internal/models/link.py
index 87651c76e25..9b2af74a517 100644
--- a/src/pip/_internal/models/link.py
+++ b/src/pip/_internal/models/link.py
@@ -6,6 +6,7 @@
 import os
 import posixpath
 import re
+import sys
 import urllib.parse
 from collections.abc import Mapping
 from dataclasses import dataclass
@@ -131,7 +132,11 @@ def _clean_file_url_path(part: str) -> str:
     # should not be quoted. On Linux where drive letters do not
     # exist, the colon should be quoted. We rely on urllib.request
     # to do the right thing here.
-    return urllib.request.pathname2url(urllib.request.url2pathname(part))
+    ret = urllib.request.pathname2url(urllib.request.url2pathname(part))
+    if sys.version_info >= (3, 14):
+        # https://discuss.python.org/t/pathname2url-changes-in-python-3-14-breaking-pip-tests/97091
+        ret = ret.removeprefix("//")
+    return ret
 
 
 # percent-encoded:                   /
diff --git a/src/pip/_internal/utils/urls.py b/src/pip/_internal/utils/urls.py
index 9f34f882a1a..e951a5e4e47 100644
--- a/src/pip/_internal/utils/urls.py
+++ b/src/pip/_internal/utils/urls.py
@@ -12,7 +12,7 @@ def path_to_url(path: str) -> str:
     quoted path parts.
     """
     path = os.path.normpath(os.path.abspath(path))
-    url = urllib.parse.urljoin("file:", urllib.request.pathname2url(path))
+    url = urllib.parse.urljoin("file://", urllib.request.pathname2url(path))
     return url
 
 
diff --git a/tests/unit/test_urls.py b/tests/unit/test_urls.py
index 0c145255080..2a56e459f1d 100644
--- a/tests/unit/test_urls.py
+++ b/tests/unit/test_urls.py
@@ -11,7 +11,7 @@
 def test_path_to_url_unix() -> None:
     assert path_to_url("/tmp/file") == "file:///tmp/file"
     path = os.path.join(os.getcwd(), "file")
-    assert path_to_url("file") == "file://" + urllib.request.pathname2url(path)
+    assert path_to_url("file") == "file://" + path
 
 
 @pytest.mark.skipif("sys.platform != 'win32'")