Build.scala

import sbt._
import Keys._
import com.github.siasia.WarPlugin.warSettings

object ProjectBuild extends Build {
  lazy val root = Project(
    id = "root",
    base = new File("."),
    settings = Project.defaultSettings ++ warSettings ++ mySettings ++ Seq(
      externalIvySettings(),
      externalIvyFile(),
      classpathConfiguration in Compile := config("compileWithProvided")))

  object MyKeys {
    lazy val jdkHomePath = SettingKey[File]("jdk-home")
    lazy val jdkAptPath = SettingKey[File]("jdk-apt")
    lazy val slim3gen = TaskKey[Unit]("slim3gen", "Slim3 APT generation")
  }

  lazy val mySettings = Seq(
    MyKeys.jdkHomePath := {
      val dir = new File(System.getProperty("java.home"))
      dir.getName() match {
        // remove trailing jre if needed
        case s if s.endsWith("jre") => dir.getParentFile()
        case _ => dir
      }
    },
    MyKeys.jdkAptPath <<= MyKeys.jdkHomePath(_ / "bin" / "apt"),
    MyKeys.slim3gen <<= (MyKeys.jdkAptPath) map { (apt) =>
      val out = new StringBuffer
      // TODO: fix arguments
      val exit = Seq(apt.absolutePath)!

      println(out)
      println(exit)
    })
}      

plugins.sbt

// https://github.com/siasia/xsbt-web-plugin/wiki/
libraryDependencies <+= sbtVersion(v => v match {
  case "0.11.0" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.0-0.2.8"
  case "0.11.1" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.1-0.2.10"
  case "0.11.2" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.2-0.2.11"
  case "0.11.3" => "com.github.siasia" %% "xsbt-web-plugin" % "0.11.3-0.2.11.1"
  case x if (x.startsWith("0.12")) => "com.github.siasia" %% "xsbt-web-plugin" % "0.12.0-0.2.11.1"
})