Provide a setting to exclude Scala library about sbt-assembly

[angelcervera]

Changed again to:
assemblyOption in assembly := (assemblyOption in assembly).value.copy(includeScala = false)

[liubov-dmitrieva]

I need to exclude scala if I am compiling for running my jar with spark and leave it if I will run locally.
Is there a better way than to comment / uncomment the line every time? Something like introduce custom parameter for sbt assembly?

assemblyOption in assembly := (assemblyOption in assembly).value.copy(includeScala = false)

[eed3si9n]

You can still override the existing behavior by rewiring the keys in Assembly scope.

excludedFiles in Assembly := { (base: Seq[File]) =>
    ((base / "scala" ** "*") +++
    (base / "spark" ** "*") +++
    ((base / "META-INF" ** "*") ---
     (base / "META-INF" / "services" ** "*") ---
     (base / "META-INF" / "maven" ** "*"))).get }

[ijuma]

I thought that this was a common enough requirement that it should be supported in the plugin, but fair enough if you disagree.

I should add that I tried your solution and it doesn't work. I haven't investigated much, but since the settings for the plugin are appended to the project's settings automatically, they won't be overridden. Personally, I think the settings should not be added automatically (like the web plugin). This way the user can choose what projects in the multi-module build need this task. For example, for spark, adding the dependency on sbt-assembly breaks the build in the examples project even though we don't care about assembly for that project. If you're interested in the error, it's:

[info] Packaging /media/internal0/home/ijuma/idea-workspace/spark/repl/target/repl-assembly-0.4-SNAPSHOT.jar ...
[error] {file:/media/internal0/home/ijuma/idea-workspace/spark/}core/:assembly: java.util.zip.ZipException: duplicate entry: spark/broadcast/BitTorrentBroadcast$PeerChatterController$$anonfun$run$1.class
[error] {file:/media/internal0/home/ijuma/idea-workspace/spark/}repl/:assembly: java.util.zip.ZipException: duplicate entry: spark/repl/JLineCompletion$JLineTabCompletion.class
[error] {file:/media/internal0/home/ijuma/idea-workspace/spark/}examples/:assembly: java.util.zip.ZipException: duplicate entry: spark/MesosScheduler$$anonfun$resourceOffer$1.class
[error] {file:/media/internal0/home/ijuma/idea-workspace/spark/}bagel/:assembly: java.util.zip.ZipException: duplicate entry: spark/broadcast/BitTorrentBroadcast$TrackMultipleValues$$anonfun$run$19.class
[error] {file:/media/internal0/home/ijuma/idea-workspace/spark/}root/*:assembly: No mapping for /media/internal0/home/ijuma/idea-workspace/spark/target/scala-2.9.0.1/classes

[eed3si9n]

Now you can write

publishArtifact in (Assembly, packageScala) := false

[ijuma]

Very cool, thanks!

[matanox]

Thanks this capability is really helpful, although, with the most current sbt release:

error: overloaded method value in with alternatives:
  (p: sbt.Reference,t: sbt.Scoped)sbt.SettingKey[Boolean] <and>
  (p: sbt.Reference,c: sbt.ConfigKey)sbt.SettingKey[Boolean] <and>
  (c: sbt.ConfigKey,t: sbt.Scoped)sbt.SettingKey[Boolean]
 cannot be applied to (sbtassembly.Assembly.type, sbt.TaskKey[sbt.File])
publishArtifact in (Assembly, packageScala) := false

Probably the sbt syntax has since changed

[chadvoegele]

For anyone else who ends up here, the syntax changed to:
assembleArtifact in packageScala := false

[radhe-kishan]

What is the newer syntax for this?