name: Java

on:
  pull_request:
    paths:
      - "**/*.java"
      - "**/*.gradle"
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  build:
    name: Check if tests compile cleanly with starter sources
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
      - name: Set up JDK 1.17
        uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165
        with:
          java-version: 17
          distribution: "temurin"
      - name: Check if tests compile cleanly with starter sources
        run: ./gradlew compileStarterTestJava --continue
        working-directory: exercises

  lint:
    name: Lint Java files using Checkstyle
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
      - name: Set up JDK 1.17
        uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165
        with:
          java-version: 17
          distribution: "temurin"
      - name: Run checkstyle
        run: ./gradlew check --exclude-task test --continue
        working-directory: exercises

  test-all:
    name: Test all exercises using java-test-runner
    if: github.event_name == 'push' || github.event_name == 'workflow_dispatch'
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
      - name: Test all exercises using java-test-runner
        run: bin/test-with-test-runner
      - name: Archive test results
        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
        with:
          name: test-results
          path: exercises/**/build/results.json
        if: failure()
        
  test-changed:
    name: Test changed exercises using gradlew
    if: github.event_name == 'pull_request'
    runs-on: ubuntu-24.04
    steps:
      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
        with:
          fetch-depth: 0
      - name: Test changed exercises using java-test-runner
        run: bin/test-changed-exercise
      - name: Archive test results
        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02
        with:
          name: test-results
          path: exercises/**/build/results.json
        if: failure()