ci: Setup of CI and CD

- Keep `release-please` action in a separate workflow
- Cache python env according to platform, python path (exact version) and `pyproject.toml` hash for fast CI
- Run `flakehell` and `black` (check-only) on pushes/PRs to ensure consistent codestyle
- Run `pytest` on pushes/PR on a matrix of python versions and platforms
- Upload code coverage to Codecov on pushes/PR
- For draft PRs, tests & checks are skipped
- Run `flit publish` on release to build and publish package (token stored as gh secret)

Closes #7
Co-authored-by: Mestery <mestery@pm.me>

.github/workflows/publish.yml

@@ -0,0 +1,36 @@
+name: CD - Publish package
+
+on:
+  release:
+    types: [released]
+
+jobs:
+  publish:
+    name: Publish to PyPI
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.9
+    - name: Cache python env
+      uses: actions/cache@v2
+      with:
+        path: ${{ env.pythonLocation }}
+        key: ${{ runner.os }}-${{ env.pythonLocation }}-${{ hashFiles('pyproject.toml') }}
+    - name: Install deps
+      env:
+        PIP_UPGRADE: True
+        UPGRADE_STRATEGY: eager
+      run: |
+        python -m pip install pip flit
+        python -m flit install --deps develop
+
+    - name: Build and publish with Flit
+      env:
+        FLIT_USERNAME: __token__
+        FLIT_PASSWORD: ${{ secrets.FLIT_TOKEN }}
+      run: python -m flit publish

.github/workflows/release-please.yml

@@ -1,4 +1,4 @@
-name: CD - Release package
+name: CD - Release Please
 
 on:
   push:

.github/workflows/test.yml

@@ -0,0 +1,80 @@
+name: CI - Test package
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+    types: [opened, reopened, synchronize, ready_for_review]
+
+
+jobs:
+  lint:
+    name: Lint
+    runs-on: ubuntu-latest
+    if: github.event.pull_request.draft == false
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: 3.9
+    - name: Cache python env
+      uses: actions/cache@v2
+      with:
+        path: ${{ env.pythonLocation }}
+        key: ${{ runner.os }}-${{ env.pythonLocation }}-${{ hashFiles('pyproject.toml') }}
+    - name: Install deps
+      env:
+        PIP_UPGRADE: True
+        UPGRADE_STRATEGY: eager
+      run: |
+        python -m pip install pip flit
+        python -m flit install --deps develop
+
+    - name: Check format with black
+      run: python -m black -v --check .
+    - name: Lint with flakehell
+      run: python -m flakehell lint -v
+
+  test:
+    name: Tests
+    needs: lint
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        python-version: [3.6, 3.7, 3.8, 3.9]
+    runs-on: ${{ matrix.os }}
+    env:
+      _OS: ${{ matrix.os }}
+      _PY: ${{ matrix.python-version }}
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v2
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v2
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Cache python env
+      uses: actions/cache@v2
+      with:
+        path: ${{ env.pythonLocation }}
+        key: ${{ runner.os }}-${{ env.pythonLocation }}-${{ hashFiles('pyproject.toml') }}
+    - name: Install deps
+      env:
+        PIP_UPGRADE: True
+        UPGRADE_STRATEGY: eager
+      run: |
+        python -m pip install pip flit
+        python -m flit install --deps develop
+
+    - name: Run tests with pytest
+      run: pytest -v --cov=incipyt --cov-report=xml
+    - name: Upload coverage to Codecov
+      uses: codecov/codecov-action@v1
+      with:
+        fail_ci_if_error: true
+        env_vars: _OS,_PY

pyproject.toml

@@ -37,7 +37,7 @@ dev = [
   "build",
   "pre-commit",
   "black",
-  "flake8!=3.9.1",
+  "flake8",
   "flakehell",
   "flake8-bandit",
   "flake8-bugbear",
@@ -49,8 +49,7 @@ dev = [
   "pep8-naming",
 ]
 test = [
-  "pytest-coverage",
-  "pytest-html",
+  "pytest-cov",
 ]
 doc = [
   "m2r",
@@ -63,6 +62,8 @@ exclude = [
   ".env",
   ".git",
 ]
+# Fix combatibility with flake8 3.9.[1-2] as of writing
+extended_default_ignore = []
 
 [tool.flakehell.plugins]
 flake8-bandit = ["+*"]
@@ -75,3 +76,7 @@ flake8-use-fstring = ["+*"]
 pep8-naming = ["+*"]
 pycodestyle = ["+*", "-W503", "-E501"]
 pyflakes = ["+*"]
+
+[tool.flakehell.exceptions."tests/*.py"]
+flake8-bandit = ["-S101"] # Asserts
+flake8-docstrings = ["-*"]

tests/test_module.py

@@ -0,0 +1,5 @@
+import incipyt  # noqa: F401
+
+
+def test_dummy():
+    assert True