build.yml

# This workflow includes a basic build job and an optional snapshot publication to GitHub packages

name: build

# Controls when the action will run.
on: [push, pull_request, workflow_dispatch]

env:
  GRADLE_MODULES_CACHE:
    gradle_cache
  GRADLE_MODULES_PATH: |
    ~/.gradle/caches
    ~/.gradle/wrapper
  BUILD_CACHE_PATH:
    ./*

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    name: Main build
    # The type of runner that the job will run on
    runs-on: ubuntu-latest

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      - name: Build Information
        run: echo Event '${{ github.event_name }}' for branch '${{ github.ref }}'.
      - name: Checkout
        uses: actions/checkout@v2
        with:
          # pull all the commits, so the commit count will be correct
          fetch-depth: 0
      - name: Cache Gradle packages
        uses: actions/cache@v2
        with:
          key: ${{env.GRADLE_MODULES_CACHE}}
          path: ${{env.GRADLE_MODULES_PATH}}
      - name: Cache Build Output
        uses: actions/cache@v2
        with:
          key: ${{github.ref}}-${{github.run_id}}
          path: ${{env.BUILD_CACHE_PATH}}
      - name: Gradle build
        run: ./gradlew build

  snapshot:
    name: Optional snapshot to Github Packages
    needs: [build]
    if: ${{ github.event_name == 'push' && (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/heads/r0.') || startsWith(github.ref, 'refs/heads/r1.')) }}
    runs-on: ubuntu-latest
    steps:
      - name: Cache Gradle packages
        uses: actions/cache@v2
        with:
          key: ${{env.GRADLE_MODULES_CACHE}}
          path: ${{env.GRADLE_MODULES_PATH}}
      - name: Cache Build Output
        uses: actions/cache@v2
        with:
          key: ${{github.ref}}-${{github.run_id}}
          path: ${{env.BUILD_CACHE_PATH}}
      - name: Publish Shapshot
        run: ./gradlew publish -PpublishRepo=Custom -PpublishUrlForSnapshots=https://maven.pkg.github.com/${{github.repository}} -PpublishUsername=${{github.actor}} -PpublishPassword=${{secrets.GITHUB_TOKEN}} ${{env.GRADLE_OPTS}}