github-docker-registry-push.yml

name: docker image building and pushing to GitHub Packages

on:
  push:
    branches:
      - 'main'
  schedule:
    - cron:  '30 4,16 * * *'
  workflow_dispatch:

env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}
  DOCKER_BUILDKIT: 1
  GHCR_USERNAME: ${{ github.repository_owner }}
  GHCR_TOKEN: ${{ secrets.GHCR_TOKEN }}

jobs:
  docker:
    runs-on: ubuntu-latest
    permissions:
      id-token: write
      contents: read
      packages: write

    steps:
      - name: Free Disk Space (Ubuntu)
        uses: jlumbroso/free-disk-space@main
        with:
          # this might remove tools that are actually needed,
          # when set to "true" but frees about 6 GB
          tool-cache: true
          # all of these default to true, but feel free to set to
          # "false" if necessary for your workflow
          android: true
          dotnet: true
          haskell: true
          large-packages: true
          swap-storage: true
      # Check if the pull request is from a forked repository
      - name: Check if PR is from a fork
        run: echo "IS_FORK=$(if [ '${{ github.event.pull_request.head.repo.full_name }}' != '${{ github.repository }}' ]; then echo 'true'; else echo 'false'; fi)" >> $GITHUB_ENV

      # Checkout the repository
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      # Set up Java environment
      - name: Set up Java
        uses: actions/setup-java@v4
        with:
          distribution: 'temurin'
          java-version: '21'
          cache: 'maven'

      # Resolve Maven cache path
      - name: Resolve Maven cache path
        run: echo "MAVEN_CACHE_PATH=$(realpath ~/.m2/repository)" >> $GITHUB_ENV

      # Cache Maven dependencies
      - name: Cache Maven dependencies
        uses: actions/cache@v4
        with:
          path: ${{ env.MAVEN_CACHE_PATH }}
          key: ${{ runner.os }}-maven-${{ hashFiles('**/pom.xml') }}
          restore-keys: |
            ${{ runner.os }}-maven-

      - name: Install the right Maven version
        uses: s4u/setup-maven-action@v1.17.0

      # Build the project with Maven and install dependencies in the Docker context
      - name: Build with Maven and install dependencies in the Docker context
        run: mvn clean install && cp -vraxu ~/.m2 .m2
        env:
          MAVEN_CACHE: ${{ env.MAVEN_CACHE_PATH }}

      # Set up QEMU for multi-platform builds
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3

      # Set up Docker Buildx for building multi-platform images
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      # Login to GitHub Container Registry
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Extract metadata (tags, labels) for Docker
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@369eb591f429131d6889c46b94e711f089e6ca96
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      # Build and push Docker image to GitHub Container Registry
      - name: Build and push Docker image
        id: push
        uses: docker/build-push-action@48aba3b46d1b1fec4febb7c5d0c644b249a11355
        with:
          context: .
          push: true
          platforms: linux/amd64, linux/arm64
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            MAVEN_CACHE=.m2