Building

(cd ../battlecore && ./gradlew build)   # Battlecore first
./gradlew build

Output: build/libs/showdown-<version>.jar. It compiles against ../battlecore/build/libs/battlecore-<battlecore_version>.jar, so build Battlecore first. ./gradlew youerSmokeTest boots the built jar on a headless Youer server and stops once it is ready.