upgrade.yml

# Portability testing across OSes and Java LTS versions
# ---
# Regularly check if we remain compatible with other OSes than Linux and if we
# could upgrade to newer LTS versions of Java.
#
# This acts more like an indicator if something is going to break. Our main
# target platform is Linux and we build against it during our regular workflow
# runs. Likewise, we're just testing if we could support newer LTS version of
# Java. We're still taking very deliberate decisions to upgrade to the next
# LTS version of Java.
name: 'Portability testing OSes and Java LTS versions'

permissions: {}

on:
  schedule:
    # runs at 5:00 on the first of every month
    - cron: '0 5 1 * *'
  # can be triggered manually
  workflow_dispatch:

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        java-lts: [ '17', '21' ]
        os: [ ubuntu-latest, macos-latest, windows-latest ]
    runs-on: ${{ matrix.os }}
    continue-on-error: true
    name: 'Building with Java ${{ matrix.java-lts }} on ${{ matrix.os }}'
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Setup Java ${{ matrix.java-lts }}
        uses: actions/setup-java@v4
        with:
          distribution: "temurin"
          java-version: ${{ matrix.java-lts }}
      - name: Setup Gradle
        uses: gradle/actions/setup-gradle@v4
      - name: Build and Test
        id: build-and-test
        run:  ./gradlew build --parallel
      - if: ${{ failure() }}
        run: touch failure
      - if: ${{ !cancelled() }}
        uses: actions/upload-artifact@v4
        with:
          name: ${{ matrix.os }}-${{ matrix.java-lts }}-failure
          path: failure
          if-no-files-found: ignore
          retention-days: 1

  process-failures:
    if: ${{ !cancelled() }}
    needs: [ build ]
    runs-on: ubuntu-latest
    steps:
      - name: Get failures from matrix jobs
        uses: actions/download-artifact@v4
        with:
          path: all-failures
          pattern: '*-failure'
          merge-multiple: true
      - name: Process failures
        id: process-failures
        run: (test -f all-failures/failure && echo 'hasFails=true' || echo 'hasFails=false') >> "$GITHUB_OUTPUT"
      - if: ${{ steps.process-failures.outputs.hasFails == 'true' }}
        uses: actions/github-script@v7
        with:
          script: |
            core.setFailed('Some matrix jobs failed.')