esphome/.github/actions/restore-python/action.yml

name: Restore Python
inputs:
  python-version:
    description: Python version to restore
    required: true
    type: string
  cache-key:
    description: Cache key to use
    required: true
    type: string
outputs:
  python-version:
    description: Python version restored
    value: ${{ steps.python.outputs.python-version }}
runs:
  using: "composite"
  steps:
    - name: Set up Python ${{ inputs.python-version }}
      id: python
      uses: actions/setup-python@v5.0.0
      with:
        python-version: ${{ inputs.python-version }}
    - name: Restore Python virtual environment
      id: cache-venv
      uses: actions/cache/restore@v4.0.2
      with:
        path: venv
        # yamllint disable-line rule:line-length
        key: ${{ runner.os }}-${{ steps.python.outputs.python-version }}-venv-${{ inputs.cache-key }}
    - name: Create Python virtual environment
      if: steps.cache-venv.outputs.cache-hit != 'true' && runner.os != 'Windows'
      shell: bash
      run: |
        python -m venv venv
        source venv/bin/activate
        python --version
        pip install -r requirements.txt -r requirements_optional.txt -r requirements_test.txt
        pip install -e .        
    - name: Create Python virtual environment
      if: steps.cache-venv.outputs.cache-hit != 'true' && runner.os == 'Windows'
      shell: bash
      run: |
        python -m venv venv
        ./venv/Scripts/activate
        python --version
        pip install -r requirements.txt -r requirements_optional.txt -r requirements_test.txt
        pip install -e .