Gradle Error while building a scala code

Help/Discuss
1

Hi,

I am facing one issue with gradle while building scala code.

$gradle makeJar
Error : org.gradle.api.tasks.TaskExecutionException : Execution failed for task ‘:compileScala’.
Caused by : java.lang.NoClassDefFoundError: scala/Function1

$gradle -v
Gradle version - 1.6
groovy - 1.8.6
Ant - 1.8.4
ivy - 2.2.0
jvm - 1.7.0_55
OS - Linux 2.6x

My build.gradle file is below -

sourceCompatibility = ‘1.6’
apply plugin: ‘scala’
def mypath = ‘file://’+new File(‘test/lib’).absolutePath
repositories {
flatDir dirs:"${mypath}"
}
configurations{
scalaPackage
}
sourceSets{
main{
scala{
srcDirs = [‘test/src/scala’]
}
}
}
dependencies {
compile fileTree(dir: mypath, includes: [’*.jar’])
}
task sourcePath{
sourceSets.main.scala.srcDirs = sourceSets.main.scala.srcDirs
sourceSets.main.java.srcDirs = []
}
task makeJar(type: Jar, dependsOn: compileScala){
archivename = "mytest.jar"
destinationDir = file(“test/oplib”)
from "build/classes"
classpath = configurations.scalaPackage
}
compileScala.dependsOn sourcePath

Here my scala source code is present in - ./test/src/scala/test.scala
scala jar files present in - ./test/lib
expected output location - ./test/oplib

Is there anything wrong with build.gradle file which might be resulting in this error. Kindly suggest.

Many Thanks, Pralay

2

I’m not sure if this relates to your final error but what do you want to achieve with this custom task ?

What it actually does is

  • during the configuration phase, set to main scala srcDirs to themselves
  • during the configuration phase, empty the main java srcDirs (which where never set anyway)
    this task does nothing during the execution phase
3

Hi Francois,

You are right. But this custom task didn’t contribute to final error, as i have tried to run again without this task and i got the same error.

Execution failed for task ‘:compileScala’.

scala/Function1

$gradle makeJar --stacktrace

java.lang.NoClassDefFoundError: scala/Function1

Thanks, Pralay