Build and test free-threaded Python on all platforms

- Expand 3.14t CI from Linux-only to all platforms (macOS, Windows)
- Add 3.15t CI entries alongside 3.15
- Add cp314t/cp315t patterns to manylinux wheel builds
- Fix 3.15-specific conditions to also match 3.15t (use startsWith)
- Add py315t to tox envlist and pip_pre config
- Remove duplicate py314t entry from tox envlist

Fixes #374

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: icemac

.github/workflows/tests.yml

@@ -106,6 +106,16 @@ jobs:
         include:
           - python-version: "3.14t"
             os: ubuntu-latest
+          - python-version: "3.14t"
+            os: macos-latest
+          - python-version: "3.14t"
+            os: windows-latest
+          - python-version: "3.15t"
+            os: ubuntu-latest
+          - python-version: "3.15t"
+            os: macos-latest
+          - python-version: "3.15t"
+            os: windows-latest
 
     steps:
       - name: checkout
@@ -151,12 +161,12 @@ jobs:
 
 
       - name: Install Build Dependencies (3.15)
-        if: matrix.python-version == '3.15'
+        if: startsWith(matrix.python-version, '3.15')
         run: |
           pip install -U pip
           pip install -U "setuptools >= 78.1.1,< 82" wheel twine cffi pycparser
       - name: Install Build Dependencies
-        if: matrix.python-version != '3.15'
+        if: ${{ !startsWith(matrix.python-version, '3.15') }}
         run: |
           pip install -U pip
           pip install -U "setuptools >= 78.1.1,< 82" wheel twine
@@ -205,14 +215,14 @@ jobs:
           python setup.py sdist
 
       - name: Install zope.interface and dependencies (3.15)
-        if: matrix.python-version == '3.15'
+        if: startsWith(matrix.python-version, '3.15')
         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 zope.interface and dependencies
-        if: matrix.python-version != '3.15'
+        if: ${{ !startsWith(matrix.python-version, '3.15') }}
         run: |
           # Install to collect dependencies into the (pip) cache.
           pip install -U pip "setuptools >= 78.1.1,< 82"
@@ -288,6 +298,16 @@ jobs:
         include:
           - python-version: "3.14t"
             os: ubuntu-latest
+          - python-version: "3.14t"
+            os: macos-latest
+          - python-version: "3.14t"
+            os: windows-latest
+          - python-version: "3.15t"
+            os: ubuntu-latest
+          - python-version: "3.15t"
+            os: macos-latest
+          - python-version: "3.15t"
+            os: windows-latest
 
     steps:
       - name: checkout

.manylinux-install.sh

@@ -32,7 +32,9 @@ tox_env_map() {
         *"cp311"*) echo 'py311';;
         *"cp312"*) echo 'py312';;
         *"cp313"*) echo 'py313';;
+        *"cp314t"*) echo 'py314t';;
         *"cp314"*) echo 'py314';;
+        *"cp315t"*) echo 'py315t';;
         *"cp315"*) echo 'py315';;
         *) echo 'py';;
     esac
@@ -46,8 +48,10 @@ for PYBIN in /opt/python/*/bin; do
        [[ "${PYBIN}" == *"cp312/"* ]] || \
        [[ "${PYBIN}" == *"cp313/"* ]] || \
        [[ "${PYBIN}" == *"cp314/"* ]] || \
-       [[ "${PYBIN}" == *"cp315/"* ]] ; then
-        if [[ "${PYBIN}" == *"cp315/"* ]] ; then
+       [[ "${PYBIN}" == *"cp314t/"* ]] || \
+       [[ "${PYBIN}" == *"cp315/"* ]] || \
+       [[ "${PYBIN}" == *"cp315t/"* ]] ; then
+        if [[ "${PYBIN}" == *"cp315/"* ]] || [[ "${PYBIN}" == *"cp315t/"* ]] ; then
             "${PYBIN}/pip" install --pre -e /io/
             "${PYBIN}/pip" wheel /io/ --pre -w wheelhouse/
         else

CHANGES.rst

@@ -4,6 +4,11 @@ Change log
 8.5 (unreleased)
 ----------------
 
+- Build and upload free-threaded (``cp314t``) wheels for all platforms.
+  Expand CI testing for free-threaded Python 3.14t from Linux-only to all
+  platforms (macOS, Windows), and add 3.15t CI.
+  See `issue 374 <https://github.com/zopefoundation/zope.interface/issues/374>`_.
+
 - Replace all remaining ``PyDict_GetItem()`` calls in the C extension with
   exception-safe alternatives (``PyDict_Contains``, ``PyDict_GetItemWithError``).
   ``PyDict_GetItem`` silently swallows exceptions from ``__hash__``/``__eq__``,

tox.ini

@@ -12,13 +12,15 @@ envlist =
     py314,py314-pure
     py315,py315-pure
     py314t,py314t-pure
+    py315t,py315t-pure
     pypy3
     docs
     coverage
-    py314t,py314t-pure
 
 [testenv]
-pip_pre = py315: true
+pip_pre =
+    py315: true
+    py315t: true
 deps =
     setuptools >= 78.1.1,< 82
     Sphinx