sbt/sbt-buildinfo

addSbtPlugin("com.eed3si9n" % "sbt-buildinfo" % "x.y.z")

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

package hello

/** This object was generated by sbt-buildinfo. */
case object BuildInfo {
  /** The value is "helloworld". */
  val name: String = "helloworld"
  /** The value is "0.1-SNAPSHOT". */
  val version: String = "0.1-SNAPSHOT"
  /** The value is "2.10.3". */
  val scalaVersion: String = "2.10.3"
  /** The value is "0.13.2". */
  val sbtVersion: String = "0.13.2"
  override val toString: String = "name: %s, version: %s, scalaVersion: %s, sbtVersion: %s".format(name, version, scalaVersion, sbtVersion)
}

buildInfoKeys ++= Seq[BuildInfoKey](
  resolvers,
  Test / libraryDependencies,
  BuildInfoKey.map(name) { case (k, v) => "project" + k.capitalize -> v.capitalize },
  "custom" -> 1234, // computed at project load time
  BuildInfoKey.action("buildTime") {
    System.currentTimeMillis
  } // re-computed each time at compile
)

  /** The value is Seq("Sonatype Public: https://oss.sonatype.org/content/groups/public"). */
  val resolvers: Seq[String] = Seq("Sonatype Public: https://oss.sonatype.org/content/groups/public")
  /** The value is Seq("org.scala-lang:scala-library:2.9.1", ...). */
  val test_libraryDependencies: Seq[String] = Seq("org.scala-lang:scala-library:2.9.1", ...)
  /** The value is "Helloworld". */
  val projectName = "Helloworld"
  /** The value is 1234. */
  val custom = 1234
  /** The value is 1346906092160L. */
  val buildTime = 1346906092160L

buildInfoObject := "Info"

buildInfoPackage := "hello"

buildInfoKeys += buildInfoBuildNumber

buildInfoOptions += BuildInfoOption.ToMap

val toMap = Map[String, Any](
  "name" -> name,
  "version" -> version,
  "scalaVersion" -> scalaVersion,
  "sbtVersion" -> sbtVersion)

buildInfoOptions += BuildInfoOption.ToJson

buildInfoOptions += BuildInfoOption.Traits("TestTrait1", "TestTrait2")

buildInfoOptions += BuildInfoOption.BuildTime

/** The value is "2015-07-30 03:30:16.849-0700". */
val builtAtString: String = "2015-07-30 03:30:16.849-0700"
/** The value is 1438227016849L. */
val builtAtMillis: Long = 1438227016849L

buildInfoPackage := "hello"
buildInfoOptions += BuildInfoOption.PackagePrivate

/** This object was generated by sbt-buildinfo. */
private[hello] case object BuildInfo {  
  ...
}

buildInfoOptions += BuildInfoOption.ConstantValue

/** This object was generated by sbt-buildinfo. */
case object BuildInfo {
  /** The value is "helloworld". */
  final val name = "helloworld"
  ...
}

buildInfoOptions += BuildInfoOption.ImportScalaPredef

package hello

import scala.Predef._

/** This object was generated by sbt-buildinfo. */
case object BuildInfo {
  ...
}