From b136e5a082a007cf424ff1fe93a2dd9b27423e18 Mon Sep 17 00:00:00 2001
From: Benjamin Gilbert <bgilbert@cs.cmu.edu>
Date: Sun, 30 Nov 2025 15:21:03 -0800
Subject: [PATCH 1/2] Require running bintool on universal Python on macOS for
 wheel testing

/usr/bin/python3 is Python 3.9.6 from Xcode.  Instead of forcibly using it
for wheel tests, use the Python we were run with, but require that to be a
universal2 binary.  These are available from the official Python
installers and thus from actions/setup-python, but notably not from
Homebrew or from MacPorts by default.

Signed-off-by: Benjamin Gilbert <bgilbert@cs.cmu.edu>
---
 .github/workflows/build.yml |  5 +++++
 bintool                     | 16 ++++++++++------
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a8d312d8..0db2bbc3 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -196,6 +196,11 @@ jobs:
           # packaging needed by glib
           python3 -m pip install --break-system-packages license-expression \
               packaging
+      - name: Install Python (macOS)
+        if: matrix.os == 'macos'
+        uses: actions/setup-python@v6
+        with:
+          python-version: '3.14'
       - name: Download source tarball
         uses: actions/download-artifact@v6
         with:
diff --git a/bintool b/bintool
index 4590c1f6..5b9e3fd5 100755
--- a/bintool
+++ b/bintool
@@ -35,6 +35,7 @@ import platform
 import shutil
 import subprocess
 import sys
+import sysconfig
 import tarfile
 from tempfile import TemporaryDirectory
 from typing import Any, BinaryIO, Self
@@ -534,14 +535,17 @@ class WheelSmokeTester(SmokeTester):
 
     def _unpack(self, dir: Path) -> None:
         log('Creating virtualenv')
-        # /usr/bin/python3 on macOS because sys.executable may not be a
-        # universal binary
-        python = (
-            '/usr/bin/python3' if self._system == 'macos' else sys.executable
-        )
+        if (
+            self._system == 'macos'
+            and '-universal2' not in sysconfig.get_platform()
+        ):
+            raise Exception(
+                'Testing macOS wheels requires bintool to be run with a '
+                'Python built as a universal binary'
+            )
         # resolve 8.3 shortname of tempdir to avoid venv warning on Windows
         # https://github.com/python/cpython/issues/90329
-        subprocess.check_call([python, '-m', 'venv', dir.resolve()])
+        subprocess.check_call([sys.executable, '-m', 'venv', dir.resolve()])
         if self._update_pip:
             subprocess.check_call(
                 [

From 2bd5426beb2b2e6b9360f9a3f059559316d86506 Mon Sep 17 00:00:00 2001
From: Benjamin Gilbert <bgilbert@cs.cmu.edu>
Date: Thu, 20 Nov 2025 15:03:14 -0800
Subject: [PATCH 2/2] Drop Python wheel support for Python 3.9

Python 3.9 is EOL.  This loses us support for Debian 11 (oldoldstable),
the default Python on EL 9, and /usr/bin/python3 on macOS.

The minimum supported Python on EL 8 now has a new enough pip.

Signed-off-by: Benjamin Gilbert <bgilbert@cs.cmu.edu>
---
 artifacts/python/README.md         | 6 +-----
 artifacts/python/pyproject.in.toml | 3 +--
 2 files changed, 2 insertions(+), 7 deletions(-)

diff --git a/artifacts/python/README.md b/artifacts/python/README.md
index 026f9e20..f5b9b534 100644
--- a/artifacts/python/README.md
+++ b/artifacts/python/README.md
@@ -20,17 +20,13 @@ of OpenSlide.
 Install with `pip install openslide-bin`.  OpenSlide Python ≥ 1.4.0 will
 automatically find openslide-bin and use it.
 
-openslide-bin is available for Python 3.9+ on the following platforms:
+openslide-bin is available for Python 3.10+ on the following platforms:
 
 - Linux aarch64 and x86_64 with glibc 2.28+ (Debian, Fedora, RHEL 8+,
   Ubuntu, many others)
 - macOS 11+ (arm64 and x86_64)
 - Windows 10+ and Windows Server 2016+ (x64)
 
-pip older than 20.3 cannot install openslide-bin, claiming that it `is not a
-supported wheel on this platform`.  On platforms with these versions of pip
-(RHEL 8), upgrade pip first with `pip install --upgrade pip`.
-
 ## Using
 
 Use OpenSlide via [OpenSlide Python][].  The OpenSlide Python
diff --git a/artifacts/python/pyproject.in.toml b/artifacts/python/pyproject.in.toml
index 3eb2e0f7..14a41160 100644
--- a/artifacts/python/pyproject.in.toml
+++ b/artifacts/python/pyproject.in.toml
@@ -19,7 +19,6 @@ classifiers = [
     "Operating System :: POSIX :: Linux",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -28,7 +27,7 @@ classifiers = [
     "Topic :: Scientific/Engineering :: Bio-Informatics",
     "Typing :: Typed",
 ]
-requires-python = ">= 3.9"
+requires-python = ">= 3.10"
 
 [project.urls]
 Homepage = "https://openslide.org/"