build.yml

name: Build
on:
  push:
    branches:
      - master
  pull_request:
    branches:
      - master

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v2

      - name: Setup Java 11 and Apache Maven
        uses: actions/setup-java@v1
        with:
          java-version: 11
          server-id: ossrh
          server-username: MAVEN_USERNAME
          server-password: MAVEN_CENTRAL_TOKEN

      - name: Build Project
        run: mvn clean verify

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