Skip python if cache is hit

Author: rowanc1

.github/workflows/deploy.yml

@@ -34,19 +34,22 @@ jobs:
         uses: actions/configure-pages@v3
       - name: Cache Notebook Execution
         uses: actions/cache@v3
+        id: cache-execution
         with:
           path: ./lectures/_build/execute
           key: ${{ runner.os }}-execute-cache-${{ hashFiles('lectures/**/*.md') }}
       - uses: actions/setup-node@v4
         with:
           node-version: 18.x
       - name: Install Python
+        if: steps.cache-execution.outputs.cache-hit != 'true'
         uses: actions/setup-python@v5
         with:
           python-version: '3.12'
           cache: 'pip'
           cache-dependency-path: '.github/requirements/requirements-execute.txt'
       - name: Install execution requirements for ipykernel and jupyter-server
+        if: steps.cache-execution.outputs.cache-hit != 'true'
         run: python -m pip install -r .github/requirements/requirements-execute.txt
         shell: bash
       - name: Install MyST Markdown