Scalingo Buildpack for the JDK

This is the official Scalingo buildpack for OpenJDK. It only installs the JDK, and does not build an application. It is used by the Java, Java WAR, Gradle, Play!, Scala, and Clojure buildpacks.

Usage from a Buildpack

This is how the buildpack is used from another buildpack:

JVM_BUILDPACK_URL="https://buildpacks-repository.s3.eu-central-1.amazonaws.com/jvm-common.tar.xz"
mkdir -p /tmp/jvm-common
curl --silent --fail --retry 3 --retry-connrefused --connect-timeout 5 --location $JVM_BUILDPACK_URL | tar xJm -C /tmp/jvm-common --strip-components=1
source /tmp/jvm-common/bin/util
source /tmp/jvm-common/bin/java

install_java_with_overlay ${BUILD_DIR}

You can also install only Java without overlay:

JVM_BUILDPACK_URL="https://buildpacks-repository.s3.eu-central-1.amazonaws.com/jvm-common.tar.xz"
mkdir -p /tmp/jvm-common
curl --silent --location $JVM_BUILDPACK_URL | tar xJm -C /tmp/jvm-common --strip-components=1
source /tmp/jvm-common/bin/util
source /tmp/jvm-common/bin/java

# Java 11 (LTS) for example
install_java ${BUILD_DIR} 11

Standalone Usage

You may install the JVM buildpack into your app by running:

scalingo env-set BUILDPACK_URL=https://github.com/Scalingo/buildpack-jvm-common

Then it may be used by itself, or with another buildpack using multiple buildpacks.

License

Licensed under the MIT License. See LICENSE file.

Credits

This buildpack is maintained by Heroku: upstream