Merge pull request #538 from boriel/feature/cache-tox-in-GH-actions

Cache tox env in GH actions

Author: boriel

.github/workflows/python-app.yml

@@ -20,10 +20,28 @@ jobs:
       uses: actions/setup-python@v2
       with:
         python-version: 3.8
+    - name: Caches pip
+      uses: actions/cache@v1
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-pip-
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
         pip install poetry tox
         poetry install
+    - name: Cache tox environments
+      id: cache-tox
+      uses: actions/cache@v1
+      with:
+        path: .tox
+        # setup.cfg, pyproject.toml, and .pre-commit-config.yaml have
+        # versioning info that would impact the tox environment. hashFiles
+        # only takes a single file path or pattern at the moment.
+        key: ${{ runner.os }}-${{ matrix.python }}-tox-${{ hashFiles('setup.cfg') }}-${{ hashFiles('pyproject.toml') }}
+
+
     - name: Run Tox
       run: tox -- --no-cov