name: Check

# Compiles every Minecraft version on pull requests, so a change that breaks
# one version (e.g. a missed or bad port) fails before it's merged instead of
# in the release build. Merges to master aren't re-checked: the PR already
# checked that code.
on:
  pull_request:

jobs:
  compile:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          submodules: true

      # The JDK comes from the runner's tool cache. `cache: gradle` stores Gradle's
      # dependencies, Loom's Minecraft cache and the build cache in the runner's
      # actions cache.
      # 1.21.x builds with Java 21 and 26.x with Java 25. The last version listed is the default
      # (Gradle runs on it), and the Gradle commands below point toolchain detection at both.
      - name: Set up Java 25 and 21
        uses: actions/setup-java@v5
        with:
          distribution: temurin
          java-version: |
            25
            21
          cache: gradle

      - name: Compile all versions
        run: |
          chmod +x gradlew
          # --continue reports every version that fails, not just the first.
          ./gradlew compileJava --no-daemon --stacktrace --continue \
            -Porg.gradle.java.installations.fromEnv=JAVA_HOME_21_X64,JAVA_HOME_25_X64