Add Python 3.12 to build and manylinux.

.github/workflows/tests.yml

@@ -87,7 +87,7 @@ jobs:
       matrix:
         # XXX: PyPy 3.9 is failing to build zope.interface 6.0!
         # Need to take this up with the zope.interface repo.
-        python-version: [3.8, 3.9, '3.10', '3.11']
+        python-version: ['3.12-dev', 3.8, 3.9, '3.10', '3.11']
         os: [ubuntu-latest, macos-latest]
         exclude:
           - os: macos-latest

CHANGES.rst

@@ -10,6 +10,8 @@
 - Add the "Requires Python" metadata to prevent installation on Python
   < 3.8.
 - Add support for Python 3.11.
+- Add preliminary support for Python 3.12. This is using a pre-release
+  version of Cython 3.
 - Bump tested database drivers to their latest versions. In
   particular, the ``mysql-connector-python`` supported version is now
   8.0.32, which introduces charset changes.

docs/install.rst

@@ -2,7 +2,7 @@
  Installation
 ==============
 
-RelStorage 3.0 is supported on Python 3.8, through 3.11, as well as
+RelStorage 3.0 is supported on Python 3.8, through 3.12, as well as
 PyPy3 3.9 or later.
 
 .. seealso:: :doc:`supported-databases`

pyproject.toml

@@ -13,5 +13,14 @@ requires = [
      # failing in Python 2 (https://travis-ci.org/github/gevent/gevent/jobs/683782800);
      # This was fixed in 3.0a5 (https://github.com/cython/cython/issues/3578).
      # 3.0 in general has improved language support.
-     "Cython >= 3.0b3",
+     # Python 3.12 requires a snapshot at this writing (2023-06-29). This is just before
+     # 3.0rc1
+     "Cython >= 3.0b3; python_version < '3.12'",
+     "Cython @ https://github.com/cython/cython/archive/37f4dcdc04547875e2836fda076f5707ec50e579.zip",
+     # cffi on py3.12 macOS at least fails to install from its wheel if we let it get installed
+     # as part of persistent:
+     # OSError: [Errno 66] Directory not empty: '///persistent.../.eggs/cffi-1.15.1-py3.12-macosx-10.9-universal2.egg/cffi-1.15.1.dist-info' -> '//persistent_/.eggs/cffi-1.15.1-py3.12-macosx-10.9-universal2.egg/EGG-INFO'
+     # Installing it here seems to get us past that
+     "cffi; python_version >= '3.12'"
+
 ]

scripts/releases/make-manylinux

@@ -2,7 +2,7 @@
 # Initially based on a snippet from the greenlet project.
 # This needs to be run from the root of the project.
 # To update: docker pull quay.io/pypa/manylinux2010_x86_64
-set -e
+set -evo pipefail
 export PYTHONUNBUFFERED=1
 export PYTHONDONTWRITEBYTECODE=1
 
@@ -38,7 +38,7 @@ export CCACHE_DIR="/ccache"
 
 # Disable some warnings produced by libev especially and also some Cython generated code.
 # Note that changing the value of these variables invalidates configure caches
-
+SLOW_BUILD=''
 GEVENT_WARNFLAGS="-Wno-strict-aliasing -Wno-comment -Wno-unused-value -Wno-unused-but-set-variable -Wno-sign-compare -Wno-parentheses -Wno-unused-function -Wno-tautological-compare -Wno-strict-prototypes -Wno-return-type -Wno-misleading-indentation"
 OPTIMIZATION_FLAGS="-pipe"
 if [ -n "$GITHUB_ACTIONS" ]; then
@@ -97,17 +97,15 @@ if [ -d /RelStorage -a -d /opt/python ]; then
     cd /RelStorage
     rm -rf wheelhouse
     mkdir wheelhouse
-
-    for variant in `ls -d /opt/python/cp{38,39,310,311}*`; do
-        # XXX: Cython 3.0b3 doesn't compile correctly on Python 3.12; the long object
-        # has changed.
+    ls -l /opt/python
+    for variant in `ls -d /opt/python/cp{312,38,39,310,311}*`; do
         echo "Building $variant"
         mkdir /tmp/build
         cd /tmp/build
         git clone /RelStorage RelStorage
         cd RelStorage
         $variant/bin/pip install -U pip
-        $variant/bin/pip install -U 'cython>=3.0b3' setuptools
+        #$variant/bin/pip install -U 'cython>=3.0b3' setuptools
         PATH=$variant/bin:$PATH $variant/bin/python setup.py bdist_wheel
         auditwheel show dist/RelStorage*.whl
         auditwheel repair dist/RelStorage*.whl
@@ -133,5 +131,5 @@ if [ ! -d $HOME/.ccache ]; then
     mkdir $HOME/.ccache
 fi
 
-docker run --rm -e GITHUB_ACTIONS -e DOCKER_IMAGE -v "$(pwd):/RelStorage" -v "$LCACHE:/cache" -v "$HOME/.ccache:/ccache" ${DOCKER_IMAGE:-quay.io/pypa/manylinux2010_x86_64} /RelStorage/scripts/releases/$(basename $0)
+docker run --rm -e GITHUB_ACTIONS -e DOCKER_IMAGE -v "$(pwd):/RelStorage" -v "$LCACHE:/cache" -v "$HOME/.ccache:/ccache" ${DOCKER_IMAGE:-quay.io/pypa/manylinux2014_aarch64} /RelStorage/scripts/releases/$(basename $0)
 ls -l wheelhouse

setup.py

@@ -51,7 +51,9 @@ def read_file(*path):
 PY3 = sys.version_info[0] == 3
 
 memcache_require = [
-    'pylibmc; platform_python_implementation=="CPython" and sys_platform != "win32"',
+    # Couldn't get this building on 3.12b3;
+    # It's deprecated though.
+    'pylibmc; platform_python_implementation=="CPython" and sys_platform != "win32" and python_version < "3.12"',
     'python-memcached; platform_python_implementation=="PyPy" or sys_platform == "win32"',
 ]
 
@@ -112,8 +114,7 @@ def read_file(*path):
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
-        # 3.12 pending Cython updates.
-        #"Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",
         "Topic :: Database",