ci(github): de-blocking workflow on lint failure, adding test job

* tox.ini: tox-gh-actions  integration
* tox.ini: lint removed from envlist, default scope is test-only
* workflows: test job added (matrixed)
* workflows: lint job is separate without matrix and without blocking workflow on failure
* workflows: reusable env lifting steps factored out into ./github/actions

Author: hleb-rubanau

.github/actions/setup-python-pip-tox/action.yml

@@ -0,0 +1,16 @@
+name: Setup base (checkout, python, pip cache, tox)
+runs:
+  using: "composite"
+  steps:
+    - uses: actions/checkout@v5
+    - uses: actions/setup-python@v6
+      with:
+        python-version: ${{ inputs.python }}
+    - uses: actions/cache@v4
+      with:
+        path: |
+          ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ inputs.python }}
+    - run: |
+        python -m pip -q install --upgrade pip "setuptools==65.6.2"
+        pip -q install "tox<4" tox-gh-actions

.github/actions/setup-rust-poetry/action.yml

@@ -0,0 +1,21 @@
+name: setup Rust and Poetry
+runs:
+  using: composite
+  steps:
+    - name: Cargo cache
+      uses: actions/cache/@v4   
+      with: 
+        path: "~/.cargo"
+      key: ${{ runner.os }}-cargo
+    - name: Poetry cache
+      uses: actions/cache/@v4   
+      with: 
+        path: "~/.cache/pypoetry"
+      key: ${{ runner.os }}-poetry-${{ inputs.python }}
+      restore-keys: |
+        ${{ runner.os }}-poetry-
+    - name: install Rust and Poetry 
+      run : |
+        curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain stable --profile minimal
+        source "$HOME/.cargo/env"
+        pip -q install poetry>=1.2.0

.github/workflows/main.yml

@@ -7,27 +7,33 @@ on:
       branches:   # CI debugging
         - "ci/**"
 jobs:
-  build:
-    runs-on: ${{ matrix.os }}
+  lint: 
+    continue-on-error: true
+    runs-on: ubuntu-latest
+    steps:
+    - uses: ./github/actions/setup-python-pip-tox
+      with:
+        python: 3.12
+    - name: Lint
+      run: tox -e lint  
+  test:
     strategy:
       fail-fast: false
       matrix:
         os: [ ubuntu-latest ]
-        python: ["3.12"]
-        include:
-        - python: "3.12"
-          tox_env: "lint"
+        python: 
+          - "3.12"
+          - "3.11"
+          - "3.10"
+          - "3.9.14"
+          - "3.8"
+    runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Python
-      uses: actions/setup-python@v2
+    - uses: ./github/actions/setup-python-pip-tox
+      with:
+        python: ${{ matrix.python }}
+    - uses: ./github/actions/setup-rust-poetry
       with:
-        python-version: ${{ matrix.python }}
-    - name: Install tox
-      run: |
-        python -m pip install --upgrade pip setuptools
-        pip install tox
+        python: ${{ matrix.python }}
     - name: Test
-      run: |
-        tox -e ${{ matrix.tox_env }}
-
+      run: tox

tox.ini

@@ -1,8 +1,19 @@
 [tox]
 isolated_build = true
+
 # The *-web environments test the latest versions of Django and Flask with the full test suite. For
 # older version of the web frameworks, just run the tests that are specific to them.
-envlist = py3{10,11,12}-{django5}, py3{8,9,10,11,12}-{web,django3,django4,flask2,sqlalchemy1},lint
+
+# Default envlist is only for matrix testing. Linter and vendoring should be called explicitly
+envlist = py3{10,11,12}-{django5}, py3{8,9,10,11,12}-{web,django3,django4,flask2,sqlalchemy1}
+
+[gh-actions]
+python =
+    3.8: py38
+    3.9: py39
+    3.10: py310
+    3.11: py311
+    3.12: py312
 
 [web-deps]
 deps=
@@ -54,4 +65,4 @@ deps = vendoring
 commands =
     poetry run vendoring {posargs:sync}
     # We don't need the .pyi files vendoring generates
-    python -c 'from pathlib import Path; all(map(Path.unlink, Path("vendor").rglob("*.pyi")))'
+    python -c 'from pathlib import Path; all(map(Path.unlink, Path("vendor").rglob("*.pyi")))'