Add preliminary support for Python 3.12a6.

.github/workflows/tests.yml

@@ -96,16 +96,17 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - "pypy-3.7"
+          - "pypy-3.9"
           - "3.7"
           - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"
+          - "3.12.0-alpha.6"
         os: [ubuntu-20.04, macos-11]
         exclude:
           - os: macos-11
-            python-version: "pypy-3.7"
+            python-version: "pypy-3.9"
 
     steps:
       - name: checkout
@@ -178,7 +179,15 @@ jobs:
           python setup.py build_ext -i
           python setup.py bdist_wheel
 
+      - name: Install BTrees and dependencies (3.12.0-alpha.6)
+        if: matrix.python-version == '3.12.0-alpha.6'
+        run: |
+          # Install to collect dependencies into the (pip) cache.
+          # Use "--pre" here because dependencies with support for this future
+          # Python release may only be available as pre-releases
+          pip install --pre .[test]
       - name: Install BTrees and dependencies
+        if: matrix.python-version != '3.12.0-alpha.6'
         run: |
           # Install to collect dependencies into the (pip) cache.
           pip install .[test]
@@ -222,6 +231,7 @@ jobs:
           && startsWith(github.ref, 'refs/tags')
           && startsWith(runner.os, 'Mac')
           && !startsWith(matrix.python-version, 'pypy')
+          && !startsWith(matrix.python-version, '3.12.0-alpha.6')
         env:
           TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}
         run: |
@@ -234,16 +244,17 @@ jobs:
       fail-fast: false
       matrix:
         python-version:
-          - "pypy-3.7"
+          - "pypy-3.9"
           - "3.7"
           - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"
+          - "3.12.0-alpha.6"
         os: [ubuntu-20.04, macos-11]
         exclude:
           - os: macos-11
-            python-version: "pypy-3.7"
+            python-version: "pypy-3.9"
 
     steps:
       - name: checkout
@@ -276,7 +287,22 @@ jobs:
         with:
           name: BTrees-${{ runner.os }}-${{ matrix.python-version }}.whl
           path: dist/
+      - name: Install BTrees 3.12.0-alpha.6
+        if: ${{ startsWith(matrix.python-version, '3.12.0-alpha.6') }}
+        run: |
+          pip install -U wheel setuptools
+          # coverage has a wheel on PyPI for a future python version which is
+          # not ABI compatible with the current one, so build it from sdist:
+          pip install -U --no-binary :all: coverage
+          # Unzip into src/ so that testrunner can find the .so files
+          # when we ask it to load tests from that directory. This
+          # might also save some build time?
+          unzip -n dist/BTrees-*whl -d src
+          # Use "--pre" here because dependencies with support for this future
+          # Python release may only be available as pre-releases
+          pip install --pre -U -e .[test]
       - name: Install BTrees
+        if: ${{ !startsWith(matrix.python-version, '3.12.0-alpha.6') }}
         run: |
           pip install -U wheel setuptools
           pip install -U coverage

.manylinux-install.sh

@@ -40,6 +40,7 @@ yum -y install libffi-devel
 
 tox_env_map() {
     case $1 in
+        *"cp312"*) echo 'py312';;
         *"cp37"*) echo 'py37';;
         *"cp38"*) echo 'py38';;
         *"cp39"*) echo 'py39';;
@@ -52,13 +53,19 @@ tox_env_map() {
 # Compile wheels
 for PYBIN in /opt/python/*/bin; do
     if \
+       [[ "${PYBIN}" == *"cp312"* ]] || \
        [[ "${PYBIN}" == *"cp311"* ]] || \
        [[ "${PYBIN}" == *"cp37"* ]] || \
        [[ "${PYBIN}" == *"cp38"* ]] || \
        [[ "${PYBIN}" == *"cp39"* ]] || \
        [[ "${PYBIN}" == *"cp310"* ]] ; then
-        "${PYBIN}/pip" install -e /io/
-        "${PYBIN}/pip" wheel /io/ -w wheelhouse/
+        if [[ "${PYBIN}" == *"cp312"* ]] ; then
+            "${PYBIN}/pip" install --pre -e /io/
+            "${PYBIN}/pip" wheel /io/ --pre -w wheelhouse/
+        else
+            "${PYBIN}/pip" install -e /io/
+            "${PYBIN}/pip" wheel /io/ -w wheelhouse/
+        fi
         if [ `uname -m` == 'aarch64' ]; then
           # Running the test suite takes forever in
           # emulation; an early run (using tox, which is also slow)

.meta.toml

@@ -2,13 +2,13 @@
 # https://github.com/zopefoundation/meta/tree/master/config/c-code
 [meta]
 template = "c-code"
-commit-id = "3c9d0741"
+commit-id = "66322213"
 
 [python]
 with-appveyor = true
 with-windows = false
 with-pypy = true
-with-future-python = false
+with-future-python = true
 with-docs = true
 with-sphinx-doctests = true
 with-macos = false

CHANGES.rst

@@ -5,7 +5,7 @@
 5.1 (unreleased)
 ================
 
-- Nothing changed yet.
+- Add preliminary support for Python 3.12a6.
 
 
 5.0 (2023-02-10)

appveyor.yml

@@ -14,6 +14,9 @@ environment:
     - python: 39-x64
     - python: 310-x64
     - python: 311-x64
+    # `multibuild` cannot install non-final versions as they are not on
+    # ftp.python.org, so we skip Python 3.11 until its final release:
+    # - python: 312-x64
 
 install:
   - "SET PYTHONVERSION=%PYTHON%"

setup.cfg

@@ -22,7 +22,7 @@ ignore =
 force_single_line = True
 combine_as_imports = True
 sections = FUTURE,STDLIB,THIRDPARTY,ZOPE,FIRSTPARTY,LOCALFOLDER
-known_third_party = six, docutils, pkg_resources
+known_third_party = docutils, pkg_resources, pytz
 known_zope =
 known_first_party =
 default_section = ZOPE

tox.ini

@@ -1,14 +1,15 @@
 # Generated from:
 # https://github.com/zopefoundation/meta/tree/master/config/c-code
 [tox]
-minversion = 3.18
+minversion = 4.0
 envlist =
     lint
     py37,py37-pure
     py38,py38-pure
     py39,py39-pure
     py310,py310-pure
     py311,py311-pure
+    py312,py312-pure
     pypy3
     docs
     coverage
@@ -17,7 +18,9 @@ envlist =
 
 [testenv]
 usedevelop = true
+pip_pre = py312: true
 deps =
+    Sphinx
 setenv =
     pure: PURE_PYTHON=1
     !pure-!pypy3: PURE_PYTHON=0