name: Docker Release Tag

on:
  push:
    tags: ["v*.*.*"]

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Log into registry ${{ env.REGISTRY }}
        uses: docker/login-action@v2
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract tag from release name
        id: extract_tag
        run: |
          echo "tag=$(echo $GITHUB_REF | sed 's|refs/tags/v||')" >> $GITHUB_OUTPUT

      - name: Tag and Push Image
        run: |
          export IMAGE_NAME=$(echo "$IMAGE_NAME" | awk '{print tolower($0)}')
          echo $IMAGE_NAME
          env
          echo ${{ env.REGISTRY }}/$IMAGE_NAME:master
          docker pull ${{ env.REGISTRY }}/$IMAGE_NAME:master
          docker tag ${{ env.REGISTRY }}/$IMAGE_NAME:master ${{ env.REGISTRY }}/$IMAGE_NAME:${{ steps.extract_tag.outputs.tag }}
          docker push ${{ env.REGISTRY }}/$IMAGE_NAME:${{ steps.extract_tag.outputs.tag }}