update-poetry-cache.yaml

################################################################################
# Ensure poetry and tox installed dependencies are in the cache.
#
# All PR's can reuse devel's caches, but a PR's cache cannot be reused from
# one PR to the next. This jobs' sole purpose is to make sure every PR updates
# devel's cache (if changes are needed) on merging.
#
# https://docs.github.com/en/actions/using-workflows/caching-dependencies-to-speed-up-workflows
################################################################################
name: update-poetry-cache

on:
  push:
    branches:
      - devel
  workflow_dispatch:

jobs:
  update-poetry-cache:
    runs-on: ubuntu-22.04
    strategy:
      matrix:
        python-version: ["3.8", "3.10"]
        include:
          - python-version: "3.8"
            python-py-version: "py38"
          - python-version: "3.10"
            python-py-version: "py310"
    container:
      image: ghcr.io/${{ github.repository }}-ci:${{ matrix.python-py-version }}-poetry-bullseye
      credentials:
        username: ${{ github.actor }}
        password: ${{ secrets.GITHUB_TOKEN }}

    steps:
    - uses: actions/checkout@v3
    - name: Poetry Venv Dir
      run: |
        echo "VENV_DIR=$(poetry config virtualenvs.path)" >> $GITHUB_ENV

    - name: Restore the Cache
      id: cache-deps
      uses: actions/cache@v3
      with:
        path: ${{ env.VENV_DIR }}
        # bump the suffix if you need to force-refresh the cache
        key: py-trees-ci-cache-${{ matrix.python-version }}-${{ hashFiles('**/poetry.lock', '**/tox.ini') }}-1

    # Install all deps, sans the project (--no-root)
    - name: Poetry - Install Dependencies
      run: poetry install --no-interaction --no-root
      if: steps.cache-deps.outputs.cache-hit != 'true'

    - name: Tox - Install Dependencies
      run: poetry run tox --workdir ${{ env.VENV_DIR }} --notest -e ${{ matrix.python-py-version }} check my${{ matrix.python-py-version }}
      if: steps.cache-deps.outputs.cache-hit != 'true'