name: 'Docker Target Image List Generator'
description: 'A Github Action to generate a list of fully qualified target images for docker related steps'
inputs:
  registries:
    description: "Comma separated list of docker registries"
    required: false
    default: "docker.io,quay.io,ghcr.io"
  images:
    description: "Comma separated list of images"
    required: true
  tags:
    description: "Comma separated list of image tags"
    required: false
    default: "edge"
outputs:
  fully-qualified-target-images:
    description: "List of fully qualified docker target images"
    value: ${{ steps.gen-fqti.outputs.fully-qualified-target-images }}
runs:
  using: "composite"
  steps:
    - name: Generate fully qualified docker target images
      id: gen-fqti
      shell: bash
      run: |
        IFS=',' read -r -a registries <<< "${{ inputs.registries }}"
        IFS=',' read -r -a images <<< "${{ inputs.images }}"
        IFS=',' read -r -a tags <<< "${{ inputs.tags }}"
        FQTI=""
        echo "Generating fully qualified docker target images for:"
        echo "🐋 Registries: ${#registries[@]}"
        echo "📷 Images:     ${#images[@]}"
        echo "🏷️ Tags:       ${#tags[@]}"
        echo "🧮 Total:      $((${#registries[@]}*${#images[@]}*${#tags[@]}))"
        for registry in "${registries[@]}"; do
          for image in "${images[@]}"; do
            for tag in "${tags[@]}"; do
              if [ -z "$FQTI" ]; then
                FQTI="${registry}/${image}:${tag}"
              else
                FQTI="$FQTI,${registry}/${image}:${tag}"
              fi
            done
          done
        done
        echo ::set-output name=fully-qualified-target-images::${FQTI}