NoClassDefFoundError: scala/App about sbt-assembly

[eed3si9n]

It should be included by default. Could you create gist of your build.sbt?

[odwrotnie]

https://gist.github.com/1933146

[eed3si9n]

I don't see anything wrong with it. Are you able to run your app using run task?

[odwrotnie]

Yes, it works great ;).

[odwrotnie]

I am using class Main extends App { ... }, could it be the problem?

[eed3si9n]

In my environment using class Main extends App { ... } raises:

Failed to load Main-Class manifest attribute from
xyz.jar

but using object Main extends App { ... } works.

[eed3si9n]

Does it print out:

[info] Including scala-library.jar

when you run assembly?

[odwrotnie]

Sorry, it is object Main extends App { ... }.

[odwrotnie]

No, it does not print out [info] Including scala-library.jar.

[eed3si9n]

Is it possible for you to zip up the project and email it to me, or create some other reproducible sample that you can share?

[odwrotnie]

This is the sample: https://github.com/odwrotnie/hello-swt.
I think it runs now but ignores this settings:

javaOptions := Seq("-XstartOnFirstThread", "-d64"),
fork := true,

./sbt run works.

[eed3si9n]

I grabbed your code, ran assembly from sbt:

Main> assembly
[info] Updating {file:/Users/foo/work/quick-demo/hello-swt/}Main...
[info] Resolving org.scala-lang#scala-library;2.9.1 ...
[info] Done updating.
[info] Compiling 1 Scala source to /Users/foo/work/quick-demo/hello-swt/main/target/scala-2.9.1/classes...
[info] No tests to run for test:test
[info] Including swt.jar
[info] Including scala-library.jar
[info] Packaging /Users/foo/work/quick-demo/hello-swt/main/target/Main-assembly-0.1.jar ...
[info] Done packaging.
[success] Total time: 7 s, completed Mar 3, 2012 8:33:28 AM

As you can see, it does print out [info] Including scala-library.jar to the shell.
Next, I exited sbt, and ran the created jar as follows:

$ java -jar main/target/Main-assembly-0.1.jar
***WARNING: Display must be created on main thread due to Cocoa restrictions.
Exception in thread "main" org.eclipse.swt.SWTException: Invalid thread access
    at org.eclipse.swt.SWT.error(Unknown Source)
    at org.eclipse.swt.SWT.error(Unknown Source)
    at org.eclipse.swt.SWT.error(Unknown Source)
    at org.eclipse.swt.widgets.Display.error(Unknown Source)
    at org.eclipse.swt.widgets.Display.createDisplay(Unknown Source)
    at org.eclipse.swt.widgets.Display.create(Unknown Source)
    at org.eclipse.swt.graphics.Device.<init>(Unknown Source)
    at org.eclipse.swt.widgets.Display.<init>(Unknown Source)
    at org.eclipse.swt.widgets.Display.<init>(Unknown Source)
    at Main$delayedInit$body.apply(main.scala:7)
    at scala.Function0$class.apply$mcV$sp(Function0.scala:34)
    at scala.runtime.AbstractFunction0.apply$mcV$sp(AbstractFunction0.scala:12)
    at scala.App$$anonfun$main$1.apply(App.scala:60)
    at scala.App$$anonfun$main$1.apply(App.scala:60)
    at scala.collection.LinearSeqOptimized$class.foreach(LinearSeqOptimized.scala:59)
    at scala.collection.immutable.List.foreach(List.scala:45)
    at scala.collection.generic.TraversableForwarder$class.foreach(TraversableForwarder.scala:30)
    at scala.App$class.main(App.scala:60)
    at Main$.main(main.scala:5)
    at Main.main(main.scala)

The App is running. Whatever that's going on inside App is throwing the error.
So I simplified the application to just println.

hello