This is a Buildpack for Scala apps. It uses sbt 0.11.0+.
This buildpack officially supports sbt 1.x and 2.x. Best-effort support is available for apps using sbt 0.13.18.
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.