Play Framework/Scala example source code file (build.sbt)

This example Play Framework source code file (build.sbt) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Play Framework (and Scala) source code examples by using tags.

All credit for the original source code belongs to Play Framework; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Play Framework tags/keywords

assets, classloader, classpath, could, found, inputkey, runtimeexception, taskkey

The build.sbt Play Framework example source code

import java.net.URLClassLoader

name := "assets-sample"

version := "1.0-SNAPSHOT"

lazy val root = (project in file(".")).enablePlugins(PlayScala)
  .dependsOn(module)
  .aggregate(module)

lazy val module = (project in file("module")).enablePlugins(PlayScala)

scalaVersion := Option(System.getProperty("scala.version")).getOrElse("2.10.4")

TaskKey[Unit]("unzip-assets-jar") := {
  IO.unzip(target.value / "universal" / "stage" / "lib" / s"${organization.value}.${normalizedName.value}-${version.value}-assets.jar", target.value / "assetsJar")
}

InputKey[Unit]("check-on-classpath") := {
  val args = Def.spaceDelimited("<resource>*").parsed
  val creator: ClassLoader => ClassLoader = play.Play.playAssetsClassLoader.value
  val classloader = creator(null)
  args.foreach { resource =>
    if (classloader.getResource(resource) == null) {
      throw new RuntimeException("Could not find " + resource + "\n in assets classloader")
    } else {
      streams.value.log.info("Found " + resource + " in classloader")
    }
  }
}

InputKey[Unit]("check-on-test-classpath") := {
  val args = Def.spaceDelimited("<resource>*").parsed
  val classpath: Classpath = (fullClasspath in Test).value
  val classloader = new URLClassLoader(classpath.map(_.data.toURI.toURL).toArray)
  args.foreach { resource =>
    if (classloader.getResource(resource) == null) {
      throw new RuntimeException("Could not find " + resource + "\nin test classpath: " + classpath)
    } else {
      streams.value.log.info("Found " + resource + " in classloader")
    }
  }
}

TaskKey[Unit]("check-assets-jar-on-classpath") := {
  val startScript = IO.read(target.value / "universal" / "stage" / "bin" / normalizedName.value)
  val assetsJar = s"${organization.value}.${normalizedName.value}-${version.value}-assets.jar"
  if (startScript.contains(assetsJar)) {
    println("Found reference to " + assetsJar + " in start script")
  } else {
    throw new RuntimeException("Could not find " + assetsJar + " in start script")
  }
}

includeFilter in (Assets, LessKeys.less) := "*.less"

excludeFilter in (Assets, LessKeys.less) := "_*.less"