Build.scala

import sbt._
import sbt.Keys._

object MyBuild extends Build  {
  import Dependencies._
  import BuildSettings._

  lazy val main = Project("root", file("."))
    .settings(mainWebSettings: _*)
    .settings(
      warName := "myweb.war",
      serverName := "mysrvr"
    )
    .settings(libraryDependencies ++=
      compile(
        liftWebkit,
        logback
      ) ++
      container(jettyWebapp) ++
      test(scalatest)
    )
}

BuildSettings.scala

import sbt._
import Keys._

import com.github.siasia.WebPlugin._
import com.github.siasia.PluginKeys._

object BuildSettings {

  // Deployment
  val serverName = SettingKey[String]("server-name")
  val warName = SettingKey[String]("war-name")
  val deployWar = TaskKey[Unit]("deploy-war", "Deploy WAR")
 
  def deployWarTask = ((packageWar in Compile), warName, serverName, streams) map {
    (war, name, srvr, s) =>
      if (war.exists) {
        s.log.info("Deploying war "+name)
        deployWar(war.getAbsolutePath, name, srvr)
      }
      else
        sys.error("There was a problem locating the WAR file for this project")
  }

  private def deployWar(src: String, dest: String, srvr: String): Unit = {
    "scp %s %s:/opt/jetty/webapps/%s".format(src, srvr, dest) !
  }

  lazy val basicSettings = seq(
    version := "1.0.0",
    organization := "myorg",
    scalaVersion := "2.10.1",
    scalacOptions := Seq("-deprecation", "-unchecked", "-encoding", "utf8"),
    resolvers ++= Dependencies.resolutionRepos
  )

  lazy val noPublishing = seq(
    publish := (),
    publishLocal := ()
  )

  lazy val mainWebSettings =
    basicSettings ++
    webSettings ++
    seq(
      // deployment
      deployWar <<= deployWarTask
    )
}

Dependencies.scala

import sbt._

object Dependencies {

  val resolutionRepos = Seq(
    "Sonatype Snapshot" at "http://oss.sonatype.org/content/repositories/snapshots"
  )

  def compile(deps: ModuleID*): Seq[ModuleID] = deps map (_ % "compile")
  def provided(deps: ModuleID*): Seq[ModuleID] = deps map (_ % "provided")
  def test(deps: ModuleID*): Seq[ModuleID] = deps map (_ % "test")
  def runtime(deps: ModuleID*): Seq[ModuleID] = deps map (_ % "runtime")
  def container(deps: ModuleID*): Seq[ModuleID] = deps map (_ % "container")

  object Ver {
    val lift = "2.5"
    val lift_edition = "2.5"
    val jetty = "8.1.8.v20121106"
  }

  // Lift
  val liftWebkit = "net.liftweb" %% "lift-webkit" % Ver.lift

  // Jetty
  val jettyWebapp = "org.eclipse.jetty" % "jetty-webapp" % Ver.jetty

  // Misc
  val logback = "ch.qos.logback" % "logback-classic" % "1.0.3"
  val scalatest = "org.scalatest" %% "scalatest" % "1.9.1"
}