Build Spring Boot with Gradle and push docker image to Github Docker registry

build.yml

name: build

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]
jobs:
  gradle:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v1
      - uses: actions/setup-java@v1
        with:
          java-version: 14
      - uses: eskatos/gradle-command-action@v1.3.3
        with:
          arguments: build
          wrapper-cache-enabled: true
          dependencies-cache-enabled: true
          configuration-cache-enabled: true
      - name: Upload build JAR
        uses: actions/upload-artifact@v2
        with:
          name: build
          path: build
  docker:
    runs-on: ubuntu-latest
    needs: gradle
    steps:
      - name: Checkout the code
        uses: actions/checkout@v1
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v1
      - name: Set up Docker Build
        uses: docker/setup-buildx-action@v1
      - name: Login to GitHub Container Registry
        uses: docker/login-action@v1
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.CR_PAT }}
      - name: Download gradle build result
        uses: actions/download-artifact@v2
        with:
          name: build
          path: build
      - run: pwd .
      - run: ls build
      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v2
        with:
          context: .
          push: true
          tags: ghcr.io/mihkels/actions-demo:latest
          build-args: |
            BUILD_DATA_DIR=build/libs
      - name: Image digest
        run: echo ${{ steps.docker_build.outputs.digest }}