How to export version from build.sbt to application.conf in Play?

Question

In build.sbt there's the setting:

version := "0.1.0"

How can I propagate its value to application.conf in Play:

app.ver = // the value of version from build.sbt

Please advise.

Answer 1

Do you need the value to be explicitly set in application.conf or just to be available at runtime? For this purpose I'm using the SBT Buildinfo plugin

Answer 2

Why don't you do it the other way around?

In application.conf :

application.version="0.1.0"

In build.sbt :

import com.typesafe.config._

val confPath = Option(System.getProperty("config.file")).getOrElse("conf/application.conf")
val conf = ConfigFactory.parseFile(new File(confPath)).resolve()

version := conf.getString("application.version")

Another advantage to do it this way is that you have very easy access to the application version from within your application, eg, for showing it in the footer of a page, etc.