add caching

.github/workflows/ci.yml

@@ -13,15 +13,23 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-python@v2
-      with:
-        python-version: 3.12
-    - name: Install dependencies
-      run: |
-        python -m pip install pdm
-        pdm install
-    - name: Run tests
-      run: |
-        docker compose run --rm -d db
-        pdm run pytest
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.12
+      - name: Cache PDM packages
+        uses: actions/cache@v4
+        with:
+          path: __pypackages__
+          key: ${{ runner.os }}-pdm-${{ hashFiles('pdm.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-pdm-
+      - name: Install dependencies
+        run: |
+          python -m pip install pdm
+          pdm install
+      - name: Run tests
+        run: |
+          docker compose run --rm -d db
+          nc --help
+          pdm run pytest