Resolving Dependencies for eclipselink by creating a fat jar with sbt and sbt-assembly?

Question

I try to create a fat jar with sbt and sbt-assembly plugin for my project with Scala and EclipseLink JPA, but the assembly command failed, because the eclipse.inf file will found twice.

> assembly
[info] Including from cache: commonj.sdo-2.1.1.jar
[info] Including from cache: javax.persistence-2.1.0.jar
[info] Including from cache: scala-library.jar
[info] Including from cache: eclipselink-2.5.1.jar
[info] Run completed in 38 milliseconds.
[info] Checking every *.class/*.jar file's SHA-1.
[info] Merging files...
[warn] Merging 'org\eclipse\persistence\descriptors\copying' with strategy 'rename'
[warn] Merging 'META-INF\MANIFEST.MF' with strategy 'discard'
[trace] Stack trace suppressed: run last *:assembly for the full output.
[error] (*:assembly) deduplicate: different file contents found in the following:
[error] C:\Users\u987\WebApps\gr\lib_managed\jars\org.eclipse.persistence\javax.persistence\jav    ax.persistence-2.1.0.jar:META-INF/eclipse.inf 
[error] C:\Users\u987\WebApps\gr\lib_managed\jars\org.eclipse.persistence\commonj.sdo\commonj.sdo-2.1.1.jar:META-INF/eclipse.inf

My build.sbt looks like:

import AssemblyKeys._

name := "TelegramReceiver"

version := "0.1"

scalaVersion := "2.10.3"

retrieveManaged in ThisBuild := true

libraryDependencies ++= Seq(
  "org.scalatest" % "scalatest_2.10" % "2.0" % "test",
  "org.eclipse.persistence" % "eclipselink" % "2.5.1" 
)

I try to solve the problem with the mergeStrategy from the sbt assembly plugin, but it doesn't work. I use sbt 0.13.1.

Thanks in advance for help!

Could you provide an example of your merge strategy and desired outcome. Do you have eclipse.inf with exact same contents, if not which one do you want to keep? — yǝsʞǝla

yǝsʞǝla yǝsʞǝla · Accepted Answer · 2014-02-18T18:40:37

You can add to your settings a custom merge strategy like this:

  mergeStrategy in assembly <<= (mergeStrategy in assembly) { (old) =>
  {
    case PathList("eclipse.inf") => MergeStrategy.rename // use any of the available strategies like `first`
    case x => old(x)
  }}

See this doc for more details.

Resolving Dependencies for eclipselink by creating a fat jar with sbt and sbt-assembly?

1 Answers