Scala is officially supported on Scalingo.
It uses sbt 0.11.0+.
Usage
Example usage:
$ ls
Procfile build.sbt project src
$ scalingo create scala-app
$ git push scalingo master
...
-----> Scala app detected
-----> Building app with sbt
-----> Running: sbt compile stage
The buildpack will detect your app as Scala if it has the
project/build.properties and either *.sbt in the root directory or
project/*.scala or .sbt/*.scala. It vendors a version of sbt and your
populated .ivy/cache into your container. The .ivy2 directory will be
cached between builds to allow for faster build times.
Clean builds
In some cases, builds need to clean artifacts before compiling. If a clean
build is necessary, configure builds to perform clean by setting
SBT_CLEAN=true:
$ scalingo env-set SBT_CLEAN=true
SBT_CLEAN has been set to true.
All subsequent deploys will use the clean task. To remove the clean task, unset SBT_CLEAN:
$ scalingo env-unset SBT_CLEAN
SBT_CLEAN has been unset.
Buildpack
More information at https://github.com/Scalingo/scala-buildpack.