Can I avoid compiling sources twice when running play2 and eclipse?

Question

Currently I am running eclipse and play (with ~run) at the same time. When I change a file it will be compiled by play and by eclipse.

Is it possible to avoid one of tho

Answer 1

You can turn off Build Automatically from the Project menu without losing any of the IDE functionality. Binaries will be built only by Sbt (on the command line).

A detailed guide for setting-up Play 2 with Scala IDE can be found on the Scala IDE website: http://scala-ide.org/docs/tutorials/play20scalaide20/index.html

Answer 2

I have not yet tried to run the play run sbt task in eclipse.

BUT you can run the server directly from eclipse.

1. Add "target/scala-2.9.1/classes" to your class path, use filters to include only your assets. (Project Properties, Java Build Path)
2. Choose "Run Configurations..." from the Run-Button-Menu.
3. Create a new "Java Application" configuration with your favourite name.
4. Main Tab: Use "DebugStart" as your main class
5. Arguments Tab: Configure any "-Dconfig.file=..." "-Dlogger.file" options you might need in VM arguments
6. Classpath Tab: Add the conf directory to the classpath (Advanced/Add Folders)

Create DebugStart.scala with:

import play.core.server.NettyServer
import java.io.File
import play.core.SBTLink
import play.core.TestApplication
import play.api.test.FakeApplication
import play.api.test.TestServer

object DebugStart {
  def main(args: Array[String]) {
    val app = FakeApplication()
    val server = TestServer(9000, app)
    server.start()
  }
}

You can now start the app with run or debug. If you use debug, you can perform some code changes without any restart.

My version of DebugStart.scala actually contains some platform dependent hackish code to kill any running process, so that I can just hit F11 or CTRL+F11 to restart the application.

To ensure that your assets/sources are up to date run:

> sbt
...
[your project] $  ~ ;play-copy-assets;sources

Answer 3

IntelliJ Idea 12 (Leda) is coming soon. I'm using 11 for a while and there's no such problems but new version will offer much better Play 2.0 integration.