Use install-poetry to use poetry with caching.

.flake8

@@ -1,5 +1,5 @@
 [flake8]
-ignore = 
+ignore =
     # line length is handled by black
     E501,
     # W503 & E203 are not PEP 8 compliant and conflicts with black
@@ -9,10 +9,11 @@ ignore =
     F541,
     # allow bare "except"
     E722
-exclude = 
+exclude =
     .git,
     __pycache__,
     .pytest_cache,
+    .venv,
     static,
     templates,
     # migrations are generated by alembic
@@ -22,4 +23,4 @@ exclude =
 
 per-file-ignores =
     # ignore unused imports in __init__
-    __init__.py:F401
+    __init__.py:F401

.github/workflows/main.yml

@@ -38,25 +38,34 @@ jobs:
           --health-retries 5
 
     steps:
-      - uses: actions/checkout@v2
+      - name: Check out repository
+        uses: actions/checkout@v2
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
 
-      - uses: actions/cache@v1
+      - name: Install poetry
+        uses: snok/install-poetry@v1
         with:
-          path: ~/.cache/poetry
-          key: ${{ runner.os }}-poetry-${{ hashFiles('**/poetry.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-poetry-
+          virtualenvs-create: true
+          virtualenvs-in-project: true
+          installer-parallel: true
+
+      - name: Run caching
+        id: cached-poetry-dependencies
+        uses: actions/cache@v2
+        with:
+          path: .venv
+          key: venv-${{ runner.os }}-${{ matrix.python-version }}-${{ hashFiles('**/poetry.lock') }}
 
       - name: Install dependencies
-        run: |
-          python -m pip install poetry==1.0.10
-          poetry config virtualenvs.create false
-          poetry install
+        if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
+        run: poetry install --no-interaction --no-root
+
+      - name: Install library
+        run: poetry install --no-interaction
 
       - name: Check formatting & linting
         run: |
@@ -65,7 +74,7 @@ jobs:
 
       - name: Test with pytest
         run: |
-          pytest
+          poetry run pytest
         env:
           GITHUB_ACTIONS_TEST: true
 

coverage.ini

@@ -1,6 +1,8 @@
 [run]
 branch = True
 source = .
+omit =
+    .venv/*
 
 [report]
 fail_under = 55