Caching in Github Actions

  get-docker-image:
    steps:
      - name: Create cache for docker image
        uses: actions/cache@v4
        with:
          path: images
          key: image-key

      - name: Download docker image from source
        run: |
          mkdir -p images
          cd images
          docker login registry
          docker pull path/image:tag
          docker save path/image:tag | gzip > docker-image.tgz

  user-docker-image:
    needs:
      - get-docker-image
    steps:
      - name: Restore cached docker image
        uses: actions/cache/restore@v4
        with:
          path: images
          key: image-key

      - name: Use the image
        working-directory: images
        run: |
          docker load < docker-image.tgz
          // do something with the image

Refs §

1. https://stackoverflow.com/questions/57498605/github-actions-share-workspace-artifacts-between-jobs