Enable Cython test for Python 3.12, using the git master

smoke/venv.sh

@@ -51,9 +51,14 @@ python -c 'import sys; print(sys.version)' | head -n1 | grep $VERSION
 # install packages with pip
 python -m pip install pytest
 if [ "$CYTHON" == "true" ]; then
-    # We try to fetch a wheel only and if that fails, we disable compilation
-    # Useful for fresh CPythons, where wheels are not yet ready, but Cython defaults to compiling
-    python -m pip install Cython --only-binary :all: || python -m pip install Cython --install-option="--no-cython-compile"
+    if [ "$VERSION" == "3.12" ]; then
+        # Cython support for 3.12.0a1+ is not yet released
+        python -m pip install https://github.com/cython/cython/archive/master.tar.gz --install-option="--no-cython-compile"
+    else
+        # We try to fetch a wheel only and if that fails, we disable compilation
+        # Useful for fresh CPythons, where wheels are not yet ready, but Cython defaults to compiling
+        python -m pip install Cython --only-binary :all: || python -m pip install Cython --install-option="--no-cython-compile"
+    fi
 fi
 
 # run tests

tests.yml

@@ -42,6 +42,9 @@
     - smoke311:
         dir: smoke
         run: runuser testuser -c 'VERSION=3.11 METHOD=venv CYTHON=false ./venv.sh'
+    - smoke312:
+        dir: smoke
+        run: runuser testuser -c 'VERSION=3.12 METHOD=venv ./venv.sh'
     - smoke39_seeder_pip:
         dir: smoke
         run: runuser testuser -c 'VERSION=3.9 METHOD=virtualenv-seeder-pip ./venv.sh'
@@ -81,6 +84,7 @@
     - python3.8
     - python3.9
     - python3.11
+    - python3.12
     - pypy
     - pypy3.8-devel
     - python2-devel