Extract Python version for pre-releases

.github/workflows/ci.yml

@@ -31,6 +31,9 @@ jobs:
           - "3.9"
           - "3.10"
           - "3.11"
+          - "~3.12.0-0"
+    continue-on-error: >-
+      ${{ contains(matrix.python-version, '~') && true || false }}
 
     steps:
       - uses: actions/checkout@v3
@@ -39,7 +42,17 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - run: python -m pip install --upgrade wheel nox
 
-      - run: python -m nox --python ${{ matrix.python-version }} --tags tests
+      - name: Determine Python version for Nox
+        run: |
+          V=${{ matrix.python-version }}
+          if [[ "$V" = ~* ]]; then
+            # Extract version from a '~3.XX.0-0' specifier.
+            V=${V:1:4}
+          fi
+
+          echo NOX_PYTHON=$V >>$GITHUB_ENV
+
+      - run: python -Im nox --python ${{ env.NOX_PYTHON }} --tags tests
 
       - name: Upload coverage data
         uses: actions/upload-artifact@v3
@@ -95,7 +108,7 @@ jobs:
           python-version: "3.10"
       - run: python -m pip install --upgrade wheel nox
 
-      - run: python -m nox -e docs
+      - run: python -Im nox -e docs
 
   package:
     name: Build & verify package
@@ -133,7 +146,7 @@ jobs:
           python-version: ${{env.PYTHON_LATEST}}
       - run: python -m pip install -e .[dev]
       - run: python -c 'import environ; print(environ.__version__)'
-        #
+
   # Ensure everything required is passing for branch protection.
   required-checks-pass:
     if: always()

noxfile.py

@@ -30,7 +30,7 @@ def tests_cov(session: nox.Session) -> None:
     _cov(session)
 
 
-@nox.session(python=["3.8", "3.9", "3.10"], tags=["tests"])
+@nox.session(python=["3.8", "3.9", "3.10", "3.12"], tags=["tests"])
 def tests(session: nox.Session) -> None:
     session.install(".[tests]")