Play 2.x + SBT + Scala + Jade

play_scala_jade

All you need to do is,

In your SBT Dependencies add,

"de.neuland" % "jade4j" % "0.3.11" from "https://raw.github.com/neuland/jade4j/master/releases/de/neuland/jade4j/0.3.11/jade4j-0.3.11.jar",
"com.googlecode.concurrentlinkedhashmap" % "concurrentlinkedhashmap-lru" % "1.3.1",
"org.apache.commons" % "commons-jexl" % "2.1.1"

You need apache libs as Jade4J uses them internally,

Create a file called JadeController.scala

import de.neuland.jade4j.Jade4J
import de.neuland.jade4j.JadeConfiguration
import de.neuland.jade4j.template.FileTemplateLoader
import de.neuland.jade4j.template.JadeTemplate
import play.api.mvc.Controller
import play.api.templates.Html
import scala.collection.JavaConversions._
import java.io.IOException


trait JadeController extends Controller {
  val jadeConfig = new JadeConfiguration

  val templateLoader = {
    jadeConfig.setTemplateLoader(new FileTemplateLoader("app/views/", "UTF-8"))
    jadeConfig.setMode(Jade4J.Mode.HTML)
    jadeConfig.setPrettyPrint(true)
  }

  def render(template: String): Html = {
    render(template, Map[String, String]())
  }

  def render(template: String, context: Map[String, Object]): Html = {
    try {
      val jadeTemplate: JadeTemplate = jadeConfig.getTemplate(template)
      new Html(new StringBuilder(jadeConfig.renderTemplate(jadeTemplate, context)))
    }
    catch {
      case ex: IOException => {
        println("Missing file exception")
        return new Html(new StringBuilder)
      }
    }
  }
}

This will take care of the rendering,

and then in your controller,

object Application extends JadeController {

  def index = Action {
    Ok(render("index.jade"))
  }
}

For play framework 2.3, replace:
import play.api.templates.Html =>
import play.twirl.api.Html
import play.twirl.api.HtmlFormat

new Html(new StringBuilder(jadeConfig.renderTemplate(jadeTemplate, context))) =>
Html.apply(new StringBuilder(jadeConfig.renderTemplate(jadeTemplate, context)).toString())

return new Html(new StringBuilder) =>
Html.apply("")