adjust GitHub actions to test Django versions

.github/workflows/main.yml

@@ -8,17 +8,36 @@ on:
 
 jobs:
   tests:
-    name: Python ${{ matrix.python-version }}
+    name: Python ${{ matrix.python-version }}, Django ${{ matrix.django-version }}
     runs-on: ubuntu-20.04
 
     strategy:
+      fail-fast: false
       matrix:
+        django-version:
+        - '3.1'
+        - '3.2'
         python-version:
         - '3.6'
         - '3.7'
         - '3.8'
         - '3.9'
 
+        include:
+        # Old Django LTS only on older Pythons
+        - django-version: '2.2'
+          python-version: '3.6'
+
+        - django-version: '2.2'
+          python-version: '3.7'
+
+        # Pre-release Django only on new Pythons
+        - django-version: 'main'
+          python-version: '3.8'
+
+        - django-version: 'main'
+          python-version: '3.9'
+
     steps:
     - uses: actions/checkout@v2
 
@@ -33,25 +52,33 @@ jobs:
         restore-keys: |
           ${{ runner.os }}-pip-
 
-    - name: Upgrade packaging tools
-      run: python -m pip install --upgrade pip setuptools virtualenv wheel
-
     - name: Install dependencies
-      run: python -m pip install --upgrade codecov tox
-
-    - name: Run tox targets for ${{ matrix.python-version }}
       run: |
-        ENV_PREFIX=$(tr -C -d "0-9" <<< "${{ matrix.python-version }}")
-        TOXENV=$(tox --listenvs | grep "^py$ENV_PREFIX" | tr '\n' ',') tox
+        python -m pip install --upgrade pip setuptools virtualenv wheel
+        python -m pip install --upgrade codecov tox tox-gh-actions
 
-    - name: Run extra tox targets
-      if: ${{ matrix.python-version == '3.9' }}
+    - name: Run tox
       run: |
-        python setup.py bdist_wheel
-        rm -r djangorestframework.egg-info  # see #6139
-        tox -e base,dist,docs
-        tox -e dist --installpkg ./dist/djangorestframework-*.whl
+        TOX_EXIT=0
+        tox || TOX_EXIT=$?
+
+        if [[ $DJANGO == '3.2' && ${{ matrix.python-version }} == '3.9' ]]; then
+          # Run extra tox targets
+          # This would not be needed after https://github.com/ymyzk/tox-gh-actions/pull/60
+          tox -e base,dist,docs
+          TOX_EXTRA_EXIT=$?
+
+          if [[ $TOX_EXIT == 0 ]]; then
+            TOX_EXIT=$TOX_EXTRA_EXIT
+          fi
+        fi
+
+        exit $TOX_EXIT
+      env:
+        DJANGO: ${{ matrix.django-version }}
 
     - name: Upload coverage
       run: |
-        codecov -e TOXENV,DJANGO
+        codecov -e DJANGO
+      env:
+        DJANGO: ${{ matrix.django-version }}

tox.ini

@@ -7,10 +7,18 @@ envlist =
        {py38,py39}-djangomain,
        base,dist,docs,
 
-[travis:env]
+[gh-actions]
+python =
+    3.6: py36
+    3.7: py37
+    3.8: py38
+    3.9: py39
+    # This needs https://github.com/ymyzk/tox-gh-actions/pull/60
+    # 3.9: py39,base,dist,docs
+
+[gh-actions:env]
 DJANGO =
     2.2: django22
-    3.0: django30
     3.1: django31
     3.2: django32
     main: djangomain