name: build

on:
  push:
    paths:
      - airflow/Dockerfile       # Trigger only if Dockerfile is changed
      - airflow/requirements.txt # Trigger only if requirements.txt is changed

jobs:
  build:
    runs-on: docker
    steps:
      - name: Checkout the repo
        uses: https://data.forgejo.org/actions/checkout@v4

      - name: Extract the current airflow version from the Dockerfile and set it in a variable name airflow_version
        id: extract_airflow_version
        run: echo "::set-output name=airflow_version::$(grep -oP '(?<=FROM apache/airflow:)[0-9]+\.[0-9]+\.[0-9]+' airflow/Dockerfile)"

      - name: Add variables
        id: add-vars
        run: |
          echo "::set-output name=registry::${GITHUB_SERVER_URL#*//}"  # built-in env variable
          echo "::set-output name=repository::${GITHUB_REPOSITORY}"    # built-in env variable
          echo "::set-output name=app::airflow"
          echo "::set-output name=context::airflow"                    # Dockerfile is in airflow folder, so context is airflow folder not .
          echo "::set-output name=dockerfile::airflow/Dockerfile"      # Dockerfile path
          echo "::set-output name=tag::${{ steps.extract_airflow_version.outputs.airflow_version }}-${{ github.sha}}"

      - name: Docker CLI installation
        run: |
          apt update
          apt install -y ca-certificates curl
          curl -fsSL https://get.docker.com -o get-docker.sh
          sh get-docker.sh

      - name: Login to Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ steps.add-vars.outputs.registry }}
          username: ${{ secrets.USERNAME_WRITE_REPOSITORY }}
          password: ${{ secrets.PASSWORD_WRITE_REPOSITORY }}

      - name: Image build
        run: docker build -f ${{ steps.add-vars.outputs.dockerfile }} -t ${{ steps.add-vars.outputs.registry }}/${{ steps.add-vars.outputs.repository }}:${{ steps.add-vars.outputs.app }}-${{ steps.add-vars.outputs.tag }} ${{ steps.add-vars.outputs.context }}

      - name: Image push to registry
        run: docker push ${{steps.add-vars.outputs.registry }}/${{steps.add-vars.outputs.repository }}:${{steps.add-vars.outputs.app }}-${{ steps.add-vars.outputs.tag }}