sbt/project/Publish.scala

import sbt._
import sbt.Keys._

object Publish {

  lazy val dontPublish = Seq(
    publish := {},
    publishLocal := {},
    publishArtifact := false
  )

  def dontPublishIn(sbv: String*) = Seq(
    // Doesn't work, the second publish or publishLocal seem not to reference the previous implementation of the key.
    // This only seems to prevent ivy.xml files to be published locally anyway…
    // See also similar case in Settings.scala.
    // publish := Def.taskDyn {
    //   if (sbv.contains(scalaBinaryVersion.value))
    //     Def.task(())
    //   else
    //     publish
    // },
    // publishLocal := Def.taskDyn {
    //   if (sbv.contains(scalaBinaryVersion.value))
    //     Def.task(())
    //   else
    //     publishLocal
    // },
    publishArtifact := {
      !sbv.contains(scalaBinaryVersion.value) && publishArtifact.value
    }
  )

  private def pomStuff = Seq(
    licenses := Seq("Apache 2.0" -> url("http://opensource.org/licenses/Apache-2.0")),
    homepage := Some(url("https://github.com/coursier/coursier")),
    scmInfo := Some(ScmInfo(
      url("https://github.com/coursier/coursier.git"),
      "scm:git:github.com/coursier/coursier.git",
      Some("scm:git:git@github.com:coursier/coursier.git")
    )),
    pomExtra := {
      <developers>
        <developer>
          <id>alexarchambault</id>
          <name>Alexandre Archambault</name>
          <url>https://github.com/alexarchambault</url>
        </developer>
      </developers>
    }
  )

  private def pushToSonatypeStuff = Seq(
    publishMavenStyle := true,
    publishTo := {
      val nexus = "https://oss.sonatype.org/"
      if (isSnapshot.value)
        Some("snapshots" at nexus + "content/repositories/snapshots")
      else
        Some("releases"  at nexus + "service/local/staging/deploy/maven2")
    },
    credentials ++= {
      Seq("SONATYPE_USER", "SONATYPE_PASS").map(sys.env.get) match {
        case Seq(Some(user), Some(pass)) =>
          Seq(Credentials("Sonatype Nexus Repository Manager", "oss.sonatype.org", user, pass))
        case _ =>
          Seq()
      }
    }
  )

  lazy val released = pomStuff ++ pushToSonatypeStuff ++ Release.settings

}