Can I access my Scala app's name and version (as set in SBT) from code?

Question

I am building an app with SBT (0.11.0) using a Scala build definition like so:

object MyAppBuild extends Build {    import Dependencies._    lazy val basicSettings = Seq[Setting[_]](     organization  := "com.my",     version       := "0.1",     description   := "Blah",     scalaVersion  := "2.9.1",     scalacOptions := Seq("-deprecation", "-encoding", "utf8"),     resolvers     ++= Dependencies.resolutionRepos   )    lazy val myAppProject = Project("my-app-name", file("."))     .settings(basicSettings: _*)     [...] 

I'm packaging a .jar at the end of the process.

My question is a simple one: is there a way of accessing the application's name ("my-app-name") and version ("0.1") programmatically from my Scala code? I don't want to repeat them in two places if I can help it.

Any guidance greatly appreciated!

Answer 1

sbt-buildinfo

I just wrote sbt-buildinfo. After installing the plugin:

lazy val root = (project in file(".")).   enablePlugins(BuildInfoPlugin).   settings(     buildInfoKeys := Seq[BuildInfoKey](name, version, scalaVersion, sbtVersion),     buildInfoPackage := "foo"   ) 

Edit: The above snippet has been updated to reflect more recent version of sbt-buildinfo.

It generates foo.BuildInfo object with any setting you want by customizing buildInfoKeys.

Ad-hoc approach

I've been meaning to make a plugin for this, (I wrote it) but here's a quick script to generate a file:

sourceGenerators in Compile <+= (sourceManaged in Compile, version, name) map { (d, v, n) =>   val file = d / "info.scala"   IO.write(file, """package foo     |object Info {     |  val version = "%s"     |  val name = "%s"     |}     |""".stripMargin.format(v, n))   Seq(file) } 

You can get your version as foo.Info.version.

Answer 2

Name and version are inserted into manifest. You can access them using java reflection from Package class.

val p = getClass.getPackage val name = p.getImplementationTitle val version = p.getImplementationVersion