multi module project jar is included twice

[nefilim]

I've been running into an issue where a multi module project jar is included twice in the universal package for said project. I've had to do a few unconventional things in the build, for instance to get the artifactId in a more maven friendly way.
I looked over a few times and can't see anything obviously wrong and was able to distill the problem into a small example project, which made me wonder if there's a bug?

You can find it here: https://github.com/nefilim/sbt-native-packager-sample

If you perform a universal:packageZipTarball you will find that the special tgz contains:

special_2.10/lib/com.xxx.special-0.1.2-SNAPSHOT.jar
special_2.10/lib/special_2.10-0.1.2-SNAPSHOT.jar

which are identical in contents.

[muuki88]

Thanks a lot for the sample. We'll have a look as soon as possible :)

[nefilim]

I'm sorry, I think this was my misunderstanding of the docs when I first started with sbt-native-packager and looked at http://www.scala-sbt.org/sbt-native-packager/DetailedTopics/universal.html#getting-started-with-universal-packaging
I interpreted that as needed to do universal packaging.

So just removing this:

    mappings in Universal <+= (packageBin in Compile) map { jar =>
      jar -> ("lib/" + jar.getName)
    },

fixes the problem. Maybe change the doc wording to be more explicit?

I'll keep my sample project up, maybe it can help others to get started with some basic universal packaging, I'll add some comments too to help anyone new. Could you possibly look it over briefly for sanity? Wouldn't want to lead anyone astray :)

[kardapoltsev]

Sure, this docs looks a bit confusing.

[muuki88]

Thanks for sharing! I think we should be more explicit that this is an example, not neccessary. Feel free to provide a pull request :)

Speaking of pull request. I started a repository with examples some time ago. Create a pull request with your sample app. I'm happy to merge: https://github.com/muuki88/sbt-native-packager-examples

[jsuereth]

Actually the doc is pretty correct, it starts you without a project archetype, where you have to explicitly add that sort of thing.

I think maybe we need to clarify that, since most people start with a Play project where this kind of thing is automatic from the archetype settings....

Sorry for any confusion! You can blame me for those docs.

[nefilim]

Thanks @jsuereth - makes sense, us mere mortals are a bit slow :)