build.yml

name: Build
on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build:  
    runs-on: ubuntu-latest
    steps:  
      - name: Checkout
        uses: actions/checkout@v3

      - name: Setup Java
        uses: actions/setup-java@v3
        with:
          java-version: 17
          distribution: 'oracle'
          cache: 'maven' 
          server-id: ossrh
          server-username: MAVEN_USERNAME
          server-password: MAVEN_CENTRAL_TOKEN

      - name: Build project 
        run: |
          mvn -B -ntp verify

      - name: Publish Snapshots
        if: github.ref == 'refs/heads/main'
        run: |
          ver=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)
          if [[ $ver == *"SNAPSHOT"* ]]; then
              mvn -B -ntp deploy
          fi
        shell: bash
        env:
          MAVEN_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
          MAVEN_CENTRAL_TOKEN: ${{ secrets.SONATYPE_PASSWORD }}