Play Framework 2: Read the application version defined in Build.scala

Question

I use the Play Framework 2.0 (2.0.3). I have a Java project and want to read the application version (appVersion) defined in Build.scala.

What I already

Answer 1

This is how you can get Play application version and application name defined in your build.sbt

name := "myApp"
version :="1.0.4" 

Notice this only works in PROD mode. In dev mode SBT shares a JVM instance with the application and those calls return something different.

Application.class.getPackage().getImplementationTitle());     // returns "myApp"
Application.class.getPackage().getImplementationVersion());    // returns "1.0.4"

In this case Application class is a class defined in your project. It can be any class from your project.

UPDATE

I noticed that this method doesn't work out of the box for Play >=2.4.x

To fix the problem add this to your build.sbt

packageOptions += Package.ManifestAttributes(
  "Implementation-Version" -> (version in ThisBuild).value,
  "Implementation-Title" -> name.value
)

The two properties will be appended to MANIFEST.FM file in your build so the package title and version can be read from the code.

fyi: I use SBT native packager

addSbtPlugin("com.typesafe.sbt" % "sbt-native-packager" % "1.0.3")