Re: [sbt] SBT Assembly Problem

[Kristian Domagala]

Yes, it sounds like at least one of the jars has a MANIFEST.MF file. Take a look at <https://github.com/sbt/sbt-assembly#merge-strategy> for options on how to resolve the issue.

Cheers,
Kristian.

On Sat, Mar 2, 2013 at 9:06 AM, Michael Schmitz <sch...@gmail.com> wrote:

Hi, I'm trying to make an sbt assembly.

> sbt assembly

...

[info] Packaging blahblah-1.0.0-SNAPSHOT.jar ...

java.util.zip.ZipException: duplicate entry: META-INF/MANIFEST.MF

Am I getting this because one of the dependencies supplies a MANIFEST.MF already?  How can I avoid that file?  Or am I having a different problem?

Is the sbt assembly program the best way to get a fat jar?

Thanks!

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[Michael Schmitz]

Thank you for your answer.  From a knowledgeable perspective it probably looks like I hadn't read about merge strategies--but really it was just a lot to take and your confirmation gave me the focus to read again, read more, and understand.

This is what I ended up using.

mergeStrategy in assembly := {

  case PathList("META-INF", xs @ _*) =>

    (xs map {_.toLowerCase}) match {

      case ("manifest.mf" :: Nil) | ("index.list" :: Nil) | ("dependencies" :: Nil) => MergeStrategy.discard

      case _ => MergeStrategy.discard

    }

  case _ => MergeStrategy.first

}

Peace.  Michael

[Ismail Kelebek]

Your last two lines are different from the merge strategies sbt offers but your lines seems to work.