This is a Buildpack for Scala apps. It uses sbt 0.11.0+.
This buildpack officially supports sbt 1.x. Best-effort support is available for apps using sbt 0.13.18. sbt 2.x support will be added after its release.
See the Getting Started on Scalingo with Scala tutorial.
Your app requires at least one .sbt file and a project/build.properties file in the root directory. The project/build.properties file must define the sbt.version property.
The buildpack uses the stage sbt task to build your application. The easiest way to provide this task is with sbt-native-packager, which includes it by default.
Specify an OpenJDK version by creating a system.properties file in the root of your project directory and setting the java.runtime.version property.
The buildpack uses the sbt.version property in your project/build.properties file to determine which sbt version to use. Update this property to change the sbt version.
Configure the buildpack by setting environment variables:
| Environment Variable | Description | Default |
|---|---|---|
SBT_TASKS |
sbt tasks to execute | compile stage |
SBT_OPTS |
JVM options for sbt execution | (none) |
SBT_CLEAN |
Run clean task before build |
false |
SBT_PROJECT |
For multi-project builds, specifies which project to build | (none) |
SBT_AT_RUNTIME |
Make sbt available at runtime | true |
KEEP_SBT_CACHE |
Prevent removal of compilation artifacts from slug | false |
For more information about using Scala on Scalingo, see the Scala documentation.