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