java.yml

name: Java

on:
  push:
    branches: [ main ]
    paths:
      - '.github/workflows/java.yml'
      - 'java/**'
      - 'test-resources/**'
    tags-ignore:
      - '**'
  pull_request:
    branches: [ main ]
    paths:
      - '.github/workflows/java.yml'
      - 'java/**'
      - 'test-resources/**'

jobs:
  build-and-test:
    name: Build and Test
    strategy:
      fail-fast: false
      matrix:
        os: [ ubuntu-latest ]
        java: [ 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 ]
    runs-on: ${{ matrix.os }}
    steps:
      - name: Checkout current branch
        uses: actions/checkout@v4
      - name: Setup JDK
        uses: actions/setup-java@v4
        with:
          java-version: ${{ matrix.java }}
          distribution: 'adopt'
          cache: gradle
      - name: Validate gradle wrapper
        uses: gradle/wrapper-validation-action@v3.3.1
      - name: Test
        run: cd java && ./gradlew test

  set-release-version:
    name: Prepare version to tag and release
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main'
    steps:
      - name: Checkout current branch
        uses: actions/checkout@v4
        with:
          fetch-depth: 2 #we need to make a git diff of the last 2 commits
      - name: Get project version
        id: get_project_version
        run: |
          cd java && PROJECT_VERSION=$(./gradlew properties | grep "version:" | awk '{print $2}')
          echo "::set-output name=project_version::$PROJECT_VERSION"
      - name: Get changed version from last two commits
        id: get_changed_version
        run: |
          CHANGED_VERSION=$(git diff HEAD^ -- ./java/gradle.properties | grep +version= | awk -F "=" '{print $2}')
          echo "::set-output name=changed_version::$CHANGED_VERSION"
      - name: Print changed version from last two commits
        run: echo ${{ steps.get_changed_version.outputs.changed_version }}
    outputs:
      project_version: ${{ steps.get_project_version.outputs.project_version }}
      changed_version: ${{ steps.get_changed_version.outputs.changed_version }}

  publish:
    name: Publish to Sonatype and Maven Central
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main' && needs.set-release-version.outputs.changed_version != ''
    needs: [build-and-test, set-release-version]
    steps:
      - uses: actions/checkout@v4
      - name: Setup JDK 8
        uses: actions/setup-java@v4
        with:
          java-version: '8'
          distribution: 'adopt'
          cache: gradle
      - name: Validate gradle wrapper
        uses: gradle/wrapper-validation-action@v3.3.1
      - name: Publish to Sonatype and Maven Central
        run: cd java && ./gradlew publishToSonatype closeAndReleaseSonatypeStagingRepository
        env:
          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
          SONATYPE_GPG_KEY: ${{ secrets.SONATYPE_GPG_KEY }}
          SONATYPE_GPG_PASSPHRASE: ${{ secrets.SONATYPE_GPG_PASSPHRASE }}

  create_github_release:
    name: Create Github Release
    runs-on: ubuntu-latest
    if: github.ref == 'refs/heads/main' && !contains(needs.set-release-version.outputs.project_version, 'SNAPSHOT')
    needs: [publish]
    steps:
      - name: Create tag
        id: create_tag
        uses: mathieudutour/github-tag-action@v6.2
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          custom_tag: ${{ needs.set-release-version.outputs.project_version }}
          tag_prefix: 'java-v'
      - name: Create release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.create_tag.outputs.new_tag }}
          generate_release_notes: false