build.yml

name: Build

# when to trigger a pipeline
on:
  push:
    branches: [ "**" ] # "**" it will trigger for any branch, if "*" if branch name contains '/' it will not work

# we can have multiple jobs build API, build UI
jobs:
  build-bookmarker-api:
    name: Build bookmarker-api
    runs-on: ubuntu-latest # you can specify ubuntu version
    defaults:
      run:
        working-directory: ./bookmarker-api
    steps:
      - uses: actions/checkout@v4 # checks out code from github
      - name: Set up JDK 17
        uses: actions/setup-java@v3
        with:
          java-version: '17'
          distribution: 'temurin' # there are multiple distribution operations.
          cache: 'maven'
      - name: Build with Maven
        run: ./mvnw verify

      - if: ${{github.ref == 'refs/heads/main' }}
        name: Build and Publish Docker Image
        run:
          ./mvwn clean package job:dockerBuild -DskipTests
          docker login -u ${{ secrets.DOCKER_USERNAME }} -p ${{ secrets.DOCKER_PASSWORD }}
          docker push ${{ secrets.DOCKER_USERNAME }}/bookmarker-api