Using the Untyped JS/Less plugins with Play 2.0 (sample SBT configuration)

Build.scala

import sbt._
import Keys._
import PlayProject._
import com.untyped.sbtjs.Plugin._
import com.untyped.sbtless.Plugin._

/* Example build config to use the Untyped JS/Less/Coffeescript plugins:
 *
 *     http://github.com/untyped/sbt-plugins
 *
 * with Play 2.0:
 *
 *     http://playframework.org
 *
 * The Untyped plugins are added to the build configuration
 * alongside Play's built-in plugins.
 *
 * By using the Untyped plugins, you get a number of advantages
 * including saner resolution of require/import filenames,
 * CLASSPATH-style file searching, and build-time templating
 * of JS/Less files. See the README files for more information:
 *
 *     https://github.com/untyped/sbt-plugins/tree/master/sbt-js
 *     https://github.com/untyped/sbt-plugins/tree/master/sbt-less
 */
object ApplicationBuild extends Build {

  val appName         = "playtest"
  val appVersion      = "1.0-SNAPSHOT"

  val appDependencies = Seq(
    // Add your project dependencies here,
  )

  val main = PlayProject(
    appName,
    appVersion,
    appDependencies,
    mainLang = SCALA
  ).settings(
    jsSettings ++
    lessSettings ++
    Seq(
      // Store your source files in app/static rather than app/assets,
      // to avoid conflict with Play's built-in JS/Coffee/Less plugins.
      //
      // You can optionally have the plugins scan the public directory
      // for additional sources, CLASSPATH style. This configuration
      // searches static/javascripts first, then public/javascripts:
      sourceDirectories in (Compile, JsKeys.js) <<= (sourceDirectory in Compile, baseDirectory)((src, base) => Seq(
        src  / "static" / "javascripts",
        base / "public" / "javascripts"
      )),
      sourceDirectories in (Compile, LessKeys.less) <<= (sourceDirectory in Compile, baseDirectory)((src, base) => Seq(
        src  / "static" / "stylesheets",
        base / "public" / "stylesheets"
      )),
      // I tend to build the minimum number of JS/CSS files per page
      // by restricting the includeFilter to a single file. YMMV:
      includeFilter in (Compile, JsKeys.js)        := "site.js",
      includeFilter in (Compile, LessKeys.less)    := "screen.less",
      // Put output files in the same place as Play does:
      resourceManaged in (Compile, JsKeys.js)     <<= (resourceManaged in Compile)(_ / "public" / "javascripts"),
      resourceManaged in (Compile, LessKeys.less) <<= (resourceManaged in Compile)(_ / "public" / "stylesheets"),
      // Make sure the plugins are called by the compile command and
      // the continuous recompilation in the run command:
      resourceGenerators in Compile               <+= (JsKeys.js     in Compile),
      resourceGenerators in Compile               <+= (LessKeys.less in Compile)
    ) : _*
  )
}

plugins.sbt

resolvers ++= Seq(
  "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/",
  Resolver.url("SBT Community", url("http://scalasbt.artifactoryonline.com/scalasbt/sbt-plugin-releases/"))(Resolver.ivyStylePatterns)
)

addSbtPlugin("play" % "sbt-plugin" % "2.0.1")

addSbtPlugin("com.untyped" %% "sbt-js" % "0.4")

addSbtPlugin("com.untyped" %% "sbt-less" % "0.4")