name: Publish docker workflow
on:
  workflow_call:
    inputs:
      build_args:
        description: Optional docker build args. If VERSION is provided, it is also used as image tag.
        required: false
        type: string
        default: ''
jobs:
  publish_docker:
    name: Build and publish docker image
    runs-on: docker-ubuntu
    steps:
      - name: Checkout source code
        uses: actions/checkout@v4

      - name: Setup docker buildx environment
        uses: docker/setup-buildx-action@v3

      - name: Login to docker registry
        uses: docker/login-action@v3
        with:
          registry: ${{ vars.CONTAINER_REGISTRY_URL }}
          username: ${{ vars.CONTAINER_REGISTRY_USERNAME }}
          password: ${{ secrets.CONTAINER_REGISTRY_TOKEN }}

      - name: Resolve docker tag
        id: resolve_tag
        shell: bash
        env:
          INPUT_BUILD_ARGS: ${{ inputs.build_args }}
        run: |
          VERSION="$(printf '%s\n' "${INPUT_BUILD_ARGS}" | sed -n 's/^VERSION=//p' | head -n 1)"
          echo "Using VERSION: ${INPUT_BUILD_ARGS}"
          if [ -n "${VERSION}" ]; then
            IMAGE_TAG="${VERSION}"
          else
            IMAGE_TAG="latest"
          fi
          echo "Identified IMAGE_TAG=${IMAGE_TAG}"
          # Store the resolved image tag as an output for subsequent steps
          echo "image_tag=${IMAGE_TAG}" >> "$GITHUB_OUTPUT"

      - name: Build and push docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          push: true
          build-args: ${{ inputs.build_args }}
          tags: |
            ${{ vars.CONTAINER_REGISTRY_URL }}/${{ gitea.repository }}:${{ steps.resolve_tag.outputs.IMAGE_TAG }} # set as version
            ${{ vars.CONTAINER_REGISTRY_URL }}/${{ gitea.repository }}:latest # set as latest