Re: [maven-and-scala] Potential scala:cc startup error?

[Ronald Petty]

Hello,

Just a little more information, and maybe this is an oversight on my part.  It seems to work if I change into a child directory and run it, but from the parent project it fails as I described.

Regards.

Ron

On Wed, Jul 25, 2012 at 2:47 PM, Ron <rpe...@messagebus.com> wrote:

Hello,

I am trying to run scala:cc as follows:

• mvn scala:cc -DdisplayCmd=true -Dverbose=true
  

My understanding is that this will start up fsc and allow continuous compiling.  Unfortunately, I don't see anything being compiled (upon changing a file and saving it.)  The only error I find is in the log file.

Exception in thread "main" java.lang.RuntimeException: Cannot figure out how to run target: scala.tools.nsc.CompileServer

at scala.sys.package$.error(package.scala:27)

at scala.tools.nsc.GenericRunnerCommand.scala$tools$nsc$GenericRunnerCommand$$guessHowToRun(GenericRunnerCommand.scala:38)

at scala.tools.nsc.GenericRunnerCommand$$anonfun$2.apply(GenericRunnerCommand.scala:48)

at scala.tools.nsc.GenericRunnerCommand$$anonfun$2.apply(GenericRunnerCommand.scala:48)

at scala.Option.getOrElse(Option.scala:108)

at scala.tools.nsc.GenericRunnerCommand.<init>(GenericRunnerCommand.scala:48)

at scala.tools.nsc.GenericRunnerCommand.<init>(GenericRunnerCommand.scala:17)

at scala.tools.nsc.MainGenericRunner.process(MainGenericRunner.scala:33)

at scala.tools.nsc.MainGenericRunner$.main(MainGenericRunner.scala:89)

at scala.tools.nsc.MainGenericRunner.main(MainGenericRunner.scala)

The output of the actual command looks like this:

[14:39][rpetty@Ronald Petty:~/workspace/scala/project-pom(feature/1.1.11.1)]$  mvn scala:cc -DdisplayCmd=true -Dverbose=true

Listening for transport dt_socket at address: 8000

[INFO] Scanning for projects...

[INFO] ------------------------------------------------------------------------

[INFO] Reactor Build Order:

[INFO] 

[INFO] maven-plugins

[INFO] project1

[INFO] project2

[INFO]                                                                         

[INFO] ------------------------------------------------------------------------

[INFO] Building maven-plugins 1.0.0-SNAPSHOT

[INFO] ------------------------------------------------------------------------

[INFO] 

[INFO] --- maven-scala-plugin:2.15.2:cc (default-cli) @ maven-plugins ---

[INFO] Checking for multiple versions of scala

[INFO] use fsc for compilation

[INFO] stop server(s)...

[INFO] cmd:  /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java -classpath /Users/rpetty/.m2/repository/org/scala-lang/scala-library/2.9.1/scala-library-2.9.1.jar:/Users/rpetty/.m2/repository/org/scala-lang/scala-compiler/2.9.1/scala-compiler-2.9.1.jar -Xbootclasspath/a:/Users/rpetty/.m2/repository/org/scala-lang/scala-library/2.9.1/scala-library-2.9.1.jar -Xms512m -Xmx2024m -XX:+UseCompressedOops -Xss1024k -XX:MaxPermSize=512M scala.tools.nsc.CompileClient -verbose -shutdown

Fast Scala compiler version 2.9.1.final -- Copyright 2002-2011, LAMP/EPFL

[Given arguments: -verbose -shutdown]

[Transformed arguments: -verbose -shutdown -current-dir /Users/rpetty/workspace/scala/messagebus-pom]

[VM arguments: ]

[Temp directory: /var/folders/zz/dkjnsl2d60b1fkvk1wc69r5r0000gp/T/scala-devel/rpetty]

[No compilation server running.]

[INFO] start server...

[INFO] cmd:  /bin/sh -c /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java -classpath /Users/rpetty/.m2/repository/org/scala-lang/scala-library/2.9.1/scala-library-2.9.1.jar:/Users/rpetty/.m2/repository/org/scala-lang/scala-compiler/2.9.1/scala-compiler-2.9.1.jar -Xbootclasspath/a:/Users/rpetty/.m2/repository/org/scala-lang/scala-library/2.9.1/scala-library-2.9.1.jar -Xms512m -Xmx2024m -XX:+UseCompressedOops -Xss1024k -XX:MaxPermSize=512M scala.tools.nsc.MainGenericRunner scala.tools.nsc.CompileServer >/private/var/folders/zz/dkjnsl2d60b1fkvk1wc69r5r0000gp/T/scala.tools.nsc.MainGenericRunner.out 2>/private/var/folders/zz/dkjnsl2d60b1fkvk1wc69r5r0000gp/T/scala.tools.nsc.MainGenericRunner.err

[INFO] wait for files to compile...

[INFO] includes = [**/*.scala,**/*.java,]

[INFO] excludes = []

Any advice?

Kindest regards.

Ron