Improve Pip/Poetry caching strategy in CI context

.github/workflows/main.yml

@@ -19,20 +19,22 @@ jobs:
           retry: true
           linksToSkip: "https://pypi.org/project/pelican-touch/"
 
+      - name: Set up Pipx cache
+        uses: actions/cache/save@v3
+        id: pipx-cache
+        with:
+          path: ~/.local/pipx/.cache
+          key: pipx-cache
+
+      - name: Install Poetry
+        run: pipx install poetry
+
       - name: Set up Python
         uses: actions/setup-python@v4
         with:
           python-version: "3.9"
-
-      - name: Set Poetry cache
-        uses: actions/cache@v3
-        id: poetry-cache
-        with:
-          path: ~/.cache/pypoetry/virtualenvs
-          key: poetry-${{ hashFiles('**/poetry.lock') }}
-
-      - name: Install Poetry
-        run: python -m pip install poetry
+          cache: "poetry"
+          cache-dependency-path: "pyproject.toml"
 
       - name: Install dependencies
         run: |
@@ -52,6 +54,16 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
+      - name: Restore Pipx cache
+        uses: actions/cache/restore@v3
+        id: pipx-cache
+        with:
+          path: ~/.cache/pip
+          key: pipx-cache
+
+      - name: Install Poetry
+        run: pipx install poetry
+
       - name: Setup Python
         uses: actions/setup-python@v4
         with:
@@ -60,9 +72,9 @@ jobs:
       - name: Check release
         id: check_release
         run: |
-          python -m pip install --upgrade pip
-          python -m pip install poetry githubrelease httpx==0.18.2 autopub
+          python -m pip install githubrelease httpx==0.18.2 autopub
           echo "release=$(autopub check)" >> $GITHUB_OUTPUT
+
       - name: Publish
         if: ${{ steps.check_release.outputs.release=='' }}
         env: