Java#

Java is detected if a pom.[xml|atom|clj|groovy|rb|scala|yaml|yml] or gradlew file is found.

Setup#

JDK#

The following major JDK versions are available

• 21
• 20
• 19
• 17 (Default)
• 11
• 8

The version can be overridden by setting the NIXPACKS_JDK_VERSION environment variable.

Gradle#

The following major Gradle versions are available

• 8 (Default)
• 7
• 6
• 5
• 4

The version can be overridden by setting the NIXPACKS_GRADLE_VERSION environment variable.

Build#

If Maven is found:

/bin/maven -DoutputFile=target/mvn-dependency-list.log -B -DskipTests clean dependency:list install

If Gradle is found:

./gradlew clean build -x check -x test

Start#

If Maven is found:

java $JAVA_OPTS -jar target/*jar

If Maven and Wildfly Swarm is found:

java -Dswarm.http.port=$PORT $JAVA_OPTS -jar target/*jar

If Maven and Spring Boot is found:

java -Dserver.port=$PORT $JAVA_OPTS -jar target/*jar

If Gradle is found:

java $JAVA_OPTS -jar $(ls -1 build/libs/*jar | grep -v plain)

If Gradle and Spring Boot is found:

java $JAVA_OPTS -jar -Dserver.port=$PORT $(ls -1 build/libs/*jar | grep -v plain)