From fe7e9a122e1efbddcbcadf703a0f2ec721eb01b3 Mon Sep 17 00:00:00 2001
From: Sander Maijers <3374183+sanmai-NL@users.noreply.github.com>
Date: Mon, 12 Jun 2023 10:10:17 +0200
Subject: [PATCH 1/3] chore: close file handle

---
 src/pdm/models/working_set.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/pdm/models/working_set.py b/src/pdm/models/working_set.py
index e8f524dae4..68f9656f77 100644
--- a/src/pdm/models/working_set.py
+++ b/src/pdm/models/working_set.py
@@ -19,7 +19,8 @@ def find_distributions(cls, context: im.DistributionFinder.Context = default_con
         meta_finder = im.MetadataPathFinder()
         for link in found_links:
             name = link.stem
-            link_pointer = Path(link.open("rb").readline().decode().strip())
+            with link.open("rb") as file_link:
+                link_pointer = Path(file_link.readline().decode().strip())
             dist = next(
                 iter(
                     meta_finder.find_distributions(im.DistributionFinder.Context(name=name, path=[str(link_pointer)]))

From 6a6c847a8822a93b7c880923e3be358758142d2a Mon Sep 17 00:00:00 2001
From: Sander Maijers <3374183+sanmai-NL@users.noreply.github.com>
Date: Mon, 12 Jun 2023 10:48:25 +0200
Subject: [PATCH 2/3] chore: close package metadata IO objects

---
 src/pdm/cli/commands/publish/package.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/pdm/cli/commands/publish/package.py b/src/pdm/cli/commands/publish/package.py
index 0eca3e0d5d..6e537ed554 100644
--- a/src/pdm/cli/commands/publish/package.py
+++ b/src/pdm/cli/commands/publish/package.py
@@ -30,7 +30,11 @@
 
 
 def parse_metadata(fp: IO[bytes]) -> email.message.Message:
-    return email.message_from_file(io.TextIOWrapper(fp, encoding="utf-8", errors="surrogateescape"))
+    """
+    Note that this function will close fp. See https://github.com/python/cpython/issues/65562.
+    """
+    with io.TextIOWrapper(fp, encoding="utf-8", errors="surrogateescape") as file:
+        return email.message_from_file(file)
 
 
 @dataclass

From f546a89cb0db17aa926533830709d4ae49dc165c Mon Sep 17 00:00:00 2001
From: Sander Maijers <3374183+sanmai-NL@users.noreply.github.com>
Date: Mon, 12 Jun 2023 10:48:47 +0200
Subject: [PATCH 3/3] chore: close file handle

---
 tests/models/test_setup_parsing.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tests/models/test_setup_parsing.py b/tests/models/test_setup_parsing.py
index 0d8d4693b1..aced77e859 100644
--- a/tests/models/test_setup_parsing.py
+++ b/tests/models/test_setup_parsing.py
@@ -84,9 +84,10 @@ def test_parse_setup_cfg(content, result, tmp_path):
             Setup("foo", "0.1.0", ["click", "requests"], {"tui": ["rich"]}, ">=3.6"),
         ),
         (
-            """from setuptools import setup
+            """from pathlib import Path
+from setuptools import setup
 
-version = open('__version__.py').read().strip()
+version = Path('__version__.py').read_text().strip()
 
 setup(name="foo", version=version)
 """,