does not work with externalPom()

[slavaschmidt]

If dependencies managed using externalPom(), the plugin does not work:

last common/scct:scalac-options
java.util.NoSuchElementException: next on empty iterator
    at scala.collection.Iterator$$anon$3.next(Iterator.scala:27)
    at scala.collection.Iterator$$anon$3.next(Iterator.scala:25)
    at scala.collection.IndexedSeqLike$Elements.next(IndexedSeqLike.scala:63)
    at scala.collection.IterableLike$class.head(IterableLike.scala:90)
    at scala.collection.mutable.ArraySeq.scala$collection$IndexedSeqOptimized$$super$head(ArraySeq.scala:45)
    at scala.collection.IndexedSeqOptimized$class.head(IndexedSeqOptimized.scala:121)
    at scala.collection.mutable.ArraySeq.head(ArraySeq.scala:45)
    at ScctPlugin$$anonfun$instrumentSettings$4.apply(ScctPlugin.scala:30)
    at ScctPlugin$$anonfun$instrumentSettings$4.apply(ScctPlugin.scala:27)
    at sbt.Scoped$$anonfun$hf3$1.apply(Structure.scala:579)
    at sbt.Scoped$$anonfun$hf3$1.apply(Structure.scala:579)
    at scala.Function1$$anonfun$compose$1.apply(Function1.scala:49)
    at sbt.Scoped$Reduced$$anonfun$combine$1$$anonfun$apply$12.apply(Structure.scala:311)
    at sbt.Scoped$Reduced$$anonfun$combine$1$$anonfun$apply$12.apply(Structure.scala:311)
    at sbt.$tilde$greater$$anonfun$$u2219$1.apply(TypeFunctions.scala:40)
    at sbt.std.Transform$$anon$5.work(System.scala:71)
    at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:232)
    at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:232)
    at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)
    at sbt.Execute.work(Execute.scala:238)
    at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:232)
    at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:232)
    at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:159)
    at sbt.CompletionService$$anon$2.call(CompletionService.scala:30)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)

[mtkopone]

I'm not entirely sure why this fails, looks like it's quite deep in sbt-territory.

As I'm a bit strapped for time, any help resolving this would be very much appreciated :)

[asomov]

The very same failure with another libraryDependencies definition (you can find a similar one in Spray - https://github.com/spray/spray):

libraryDependencies <<= scalaVersion { v =>
  val akkaVersion  = "2.0.4"
  val sprayVersion = "1.0-M6"
  Seq(
    "com.typesafe.akka" %   "akka-actor"       % akkaVersion,
    "io.spray"          %   "spray-routing"    % sprayVersion,
    "ch.qos.logback"    %   "logback-classic"  % "1.0.7"        % "runtime",
    "com.typesafe.akka" %   "akka-testkit"     % akkaVersion    % "test",
    "io.spray"          %   "spray-testkit"    % sprayVersion   % "test",
    "org.mockito"       %   "mockito-all"      % "1.9.5"        % "test"
  )
}

[mtkopone]

Hi,

Preface: The sbt-scct plugin adds the the scct instrumentation+reporting library (scct.jar) as a dependency when the plugin is enabled.

For the libraryDependencies issue: "<<=" apparently replaces the libraryDependencies with the new value. Dependencies added by plugins are therefore wiped. To fix the problem, use "<++=" instead of "<<=". Also, you can manually add the scct-dependency with "reaktor" %% "scct" % "0.2-SNAPSHOT" % "scct" (yeah, the scope is "scct")

For the externalPom issue: That's deeper. It looks like the pom overwrites so many settings that the sbt-scct plugin itself is not invoked and the classpaths are all wonky. Still looks very sbt-magical.