name: Build docker image
on:
  workflow_call:
    inputs:
      ci_image:
        required: true
        type: string
        description: image to use inside the workflow jobs
        default: git.romalex.cc/public/ci-image:v1
      registry:
        required: true
        type: string
        description: registry to push images to
        default: git.romalex.cc
      dockerfile_path:
        required: true
        type: string
        description: path to Dockerfile
        default: Dockerfile
      registry_user:
        required: true
        type: string
        description: username to access gitea registry
        default: ${{ github.actor }}
    secrets:
      registry_access_token:
        required: true
        description: Token to access the gitea registry
    outputs:
      version:
        description: Published image version
        value: ${{ jobs.set_version.outputs.version }}

jobs:

  set_version:
    name: Set image version
    runs-on: romalex-public
    container:
      image: ${{ inputs.ci_image }}
    outputs:
      version: ${{ steps.calculate.outputs.version }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Calculate image version
        id: calculate
        run: |
          if [ -s version.txt ]; then
              echo "version=$(cat version.txt)" >> "${GITHUB_OUTPUT}"
          elif [ "${{ github.ref_type }}" = 'tag' ]; then
              echo 'version=${{ github.ref_name }}' >> "${GITHUB_OUTPUT}"
          else
              echo "version=$(echo '${{ github.sha }}' | cut -c -6)" >> "${GITHUB_OUTPUT}"
          fi

  build_image:
    name: Build docker image
    runs-on: romalex-public
    container:
      image: ${{ inputs.ci_image }}
    needs: set_version
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Login to registry
        uses: docker/login-action@v3
        with:
          registry: ${{ inputs.registry }}
          username: ${{ inputs.registry_user }}
          password: ${{ secrets.registry_access_token }}
      - name: Build and push
        uses: docker/build-push-action@v6
        with:
          push: true
          file: ${{ inputs.dockerfile_path }}
          tags: |
            ${{ inputs.registry }}/${{ github.repository }}:${{ needs.set_version.outputs.version }}