💚 Fix CI installs and tests (#2)

.github/workflows/test.yml

@@ -4,6 +4,12 @@ on:
   push:
   pull_request:
     types: [opened, synchronize]
+  workflow_dispatch:
+    inputs:
+      debug_enabled:
+        description: 'Run the build with tmate debugging enabled (https://github.com/marketplace/actions/debugging-with-tmate)'     
+        required: false
+        default: false
 
 jobs:
   test:
@@ -19,26 +25,36 @@ jobs:
         uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
+      # Allow debugging with tmate
+      - name: Setup tmate session
+        uses: mxschmitt/action-tmate@v3
+        if: ${{ github.event_name == 'workflow_dispatch' && github.event.inputs.debug_enabled }}
+        with:
+          limit-access-to-actor: true
       - uses: actions/cache@v2
         id: cache
         with:
           path: ${{ env.pythonLocation }}
-          key: ${{ runner.os }}-python-${{ env.pythonLocation }}-${{ hashFiles('pyproject.toml') }}-test
+          key: ${{ runner.os }}-python-${{ env.pythonLocation }}-${{ hashFiles('pyproject.toml') }}-root
       - name: Install poetry
         if: steps.cache.outputs.cache-hit != 'true'
+        # TODO: remove python -m pip install --force git+https://github.com/python-poetry/poetry-core.git@ad33bc2
+        # once there's a release of Poetry 1.2.x including poetry-core > 1.1.0a6
+        # Ref: https://github.com/python-poetry/poetry-core/pull/188
         run: |
           python -m pip install --upgrade pip
-          python -m pip install "poetry>=1.2.0a1"
-          python -m poetry plugin add poetry-version-plugin 
+          python -m pip install --force git+https://github.com/python-poetry/poetry-core.git@ad33bc2
+          python -m pip install "poetry==1.2.0a2"
+          python -m poetry plugin add poetry-version-plugin
       - name: Configure poetry
-        run: python -m poetry config virtualenvs.in-project true
-      - name: Ensure cache is healthy
-        if: steps.cache.outputs.cache-hit == 'true'
-        run: python -m poetry run pip --version >/dev/null 2>&1 || rm -rf .venv
+        run: python -m poetry config virtualenvs.create false
       - name: Install Dependencies
         if: steps.cache.outputs.cache-hit != 'true'
         run: python -m poetry install
+      - name: Lint
+        if: ${{ matrix.python-version != '3.6' }}
+        run: python -m poetry run bash scripts/lint.sh
       - name: Test
-        run: bash scripts/test.sh
+        run: python -m poetry run bash scripts/test.sh
       - name: Upload coverage
         uses: codecov/codecov-action@v1