ci: Use Poetry for CI (#86)

* ci: Use Poetry for CI

Installs Poetry and uses it for dependency setup and virtualenv execution in CI. If nothing has changed in the lockfile, use cached virtual environment.

* ci: Add excludes for flake8

* build: Add pytest-cov to pyproject dependencies

Author: jidicula

.flake8

@@ -4,4 +4,12 @@ ignore = E203,E501,W503
 max-line-length = 88
 import-order-style = google
 per-file-ignores = noxfile.py:ANN
-docstring-convention = google
+docstring-convention = google
+exclude = 
+    .git
+    .venv
+    __pycache__
+    docs/source/conf.py
+    old
+    build
+    dist

.github/workflows/python-package.yml

@@ -24,19 +24,29 @@ jobs:
       uses: actions/setup-python@v3
       with:
         python-version: ${{ matrix.python-version }}
+    - name: Install and configure Poetry
+      uses: snok/install-poetry@v1
+      with:
+        virtualenvs-create: true
+        virtualenvs-in-project: true
+        installer-parallel: true
+    - name: Load cached venv
+      id: cached-poetry-dependencies
+      uses: actions/cache@v3
+      with:
+        path: .venv
+        key: venv-${{ runner.os }}-${{ steps.setup-python.outputs.python-version }}-${{ hashFiles('**/poetry.lock') }}
     - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        python -m pip install flake8 pytest pytest-cov requests pandas
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+      if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
+      run: poetry install --no-interaction --no-root --all-extras
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        poetry run flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+        poetry run flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Test with pytest
       run: |
-        pytest --cov
+        poetry run pytest --cov
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v3

poetry.lock

@@ -29,6 +29,7 @@ flake8-docstrings = "^1.6.0"
 darglint = "^1.8.1"
 Sphinx = "^5.2.3"
 sphinx-autodoc-typehints = "^1.19.4"
+pytest-cov = "^4.0.0"
 
 [build-system]
 requires = ["poetry-core"]