dockerbuild.yaml

#################################################################################
# Copyright (c) 2023 T-Systems International GmbH
# Copyright (c) 2023 Contributors to the Eclipse Foundation
#
# See the NOTICE file(s) distributed with this work for additional
# information regarding copyright ownership.
#
# This program and the accompanying materials are made available under the
# terms of the Apache License, Version 2.0 which is available at
# https://www.apache.org/licenses/LICENSE-2.0.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
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# SPDX-License-Identifier: Apache-2.0
################################################################################
name: dockerbuild

on:
  push:
    branches:
      - 'main'
    tags:
      - 'v*.*.*'
      - 'v*.*.*-*'
  pull_request:
    branches:
      - main

env:
   IMAGE_NAMESPACE: "tractusx"
   IMAGE_NAME: "managed-simple-data-exchanger-backend"

jobs:
  docker:
    runs-on: ubuntu-latest
    permissions:
      packages: write

    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Set up JDK 18
        uses: actions/setup-java@v3
        with:
          java-version: '18'
          distribution: 'temurin'
        
      - name: Build
        run: mvn -B package

      # Create SemVer or ref tags dependent of trigger event
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v4
        with:
           images: |
              ${{ env.IMAGE_NAMESPACE }}/${{ env.IMAGE_NAME }}
           # Automatically prepare image tags; See action docs for more examples. 
           # semver patter will generate tags like these for example :1 :1.2 :1.2.3
           tags: |
              type=ref,event=branch
              type=ref,event=pr
              type=semver,pattern={{version}}
              type=semver,pattern={{major}}
              type=semver,pattern={{major}}.{{minor}}
           flavor: |
              latest=true

      - name: DockerHub login
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v2
        with:
           # Use existing DockerHub credentials present as secrets
           username: ${{ secrets.DOCKER_HUB_USER }}
           password: ${{ secrets.DOCKER_HUB_TOKEN }}

      - name: Build and push
        uses: docker/build-push-action@v3
        with:
           context: .
           file: ./build/Dockerfile
           # Build image for verification purposes on every trigger event. Only push if event is not a PR
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

       # https://github.com/peter-evans/dockerhub-description
       # Important step to push image description to DockerHub 
      - name: Update Docker Hub description
        if: github.event_name != 'pull_request'
        uses: peter-evans/dockerhub-description@v3
        with:
           # readme-filepath defaults to toplevel README.md, Only necessary if you have a dedicated file with your 'Notice for docker images'   
           # readme-filepath: path/to/dedicated/notice-for-docker-image.md 
           username: ${{ secrets.DOCKER_HUB_USER }}
           password: ${{ secrets.DOCKER_HUB_TOKEN }}
           repository: ${{ env.IMAGE_NAMESPACE }}/${{ env.IMAGE_NAME }}