pekko/project/Publish.scala

package akka

import sbt._
import sbt.Keys._
import sbt.Project.Initialize
import java.io.File

object Publish {
  final val Snapshot = "-SNAPSHOT"

  val defaultPublishTo = SettingKey[File]("default-publish-to")

  lazy val settings = Seq(
    crossPaths := false,
    pomExtra := akkaPomExtra,
    publishTo <<= akkaPublishTo,
    credentials ++= akkaCredentials,
    organizationName := "Typesafe Inc.",
    organizationHomepage := Some(url("http://www.typesafe.com"))
  )

  lazy val versionSettings = Seq(
    commands += stampVersion
  )

  def akkaPomExtra = {
    <inceptionYear>2009</inceptionYear>
    <url>http://akka.io</url>
    <licenses>
      <license>
        <name>Apache 2</name>
        <url>http://www.apache.org/licenses/LICENSE-2.0.txt</url>
        <distribution>repo</distribution>
      </license>
    </licenses>
  }

  def akkaPublishTo: Initialize[Option[Resolver]] = {
    defaultPublishTo { default =>
      val property = Option(System.getProperty("akka.publish.repository"))
      val repo = property map { "Akka Publish Repository" at _ }
      repo orElse Some(Resolver.file("Default Local Repository", default))
    }
  }

  def akkaCredentials: Seq[Credentials] = {
    val property = Option(System.getProperty("akka.publish.credentials"))
    property map (f => Credentials(new File(f))) toSeq
  }

  // timestamped versions

  def stampVersion = Command.command("stamp-version") { state =>
    val extracted = Project.extract(state)
    extracted.append(List(version in ThisBuild ~= stamp), state)
  }

  def stamp(version: String): String = {
    if (version endsWith Snapshot) (version stripSuffix Snapshot) + "-" + timestamp(System.currentTimeMillis)
    else version
  }

  def timestamp(time: Long): String = {
    val format = new java.text.SimpleDateFormat("yyyyMMdd-HHmmss")
    format.format(new java.util.Date(time))
  }
}