_merge_cache.yml

name: Collect new packages and upload cache

on:
  workflow_call:
    inputs:
      pypi-key:
        description: cache restore/dump key
        required: false
        type: string
        default: "pypi-packages"
      pypi-dir:
        description: location of local PyPI cache
        required: false
        type: string
        default: "_ci-cache_PyPI"
      cache-artifact-appendix:
        description: "unique name for the job"
        required: true
        type: string

jobs:
  merge-caches:
    runs-on: ubuntu-latest
    steps:
      - name: Download 📥 artifacts
        uses: actions/download-artifact@v4
        with:
          pattern: ${{ inputs.pypi-key }}-run-${{ inputs.cache-artifact-appendix }}*
          merge-multiple: true
          path: _local-packages
      - name: Cache pull packages
        uses: actions/cache/restore@v3
        with:
          enableCrossOsArchive: true
          path: ${{ inputs.pypi-dir }}
          key: ${{ inputs.pypi-key }}

      - name: show 📦
        run: |
          # create the directory if it doesn't exist - no artifact were found
          mkdir -p _local-packages
          ls -lh _local-packages
          ls -lh ${{ inputs.pypi-dir }}
          # count files in the staging dir
          file_count=$(ls -1 "_local-packages/" | wc -l)
          echo "NUM_PACKAGES=$file_count" >> $GITHUB_ENV
      - name: Move collected 📦
        if: env.NUM_PACKAGES != 0
        run: mv _local-packages/* ${{ inputs.pypi-dir }}

      - name: Cache push packages
        if: env.NUM_PACKAGES != 0
        uses: actions/cache/save@v3
        with:
          enableCrossOsArchive: true
          path: ${{ inputs.pypi-dir }}
          key: ${{ inputs.pypi-key }}