how to copy all source jars using gradle

Question

We have an old playframework 1.2.x version where we copy all the jars to project/lib so playframework can consume them. We would LOVE to copy all the source jars as well so

Answer 1

Here eskatos solution translated in Kotlin DSL:

tasks {
    "copySourceJars"(Copy::class) {
        val sources = configurations.runtime.resolvedConfiguration.resolvedArtifacts.map {
            with(it.moduleVersion.id) { 
                dependencies.create(group, name, version, classifier = "sources") 
            }
        }
        from(
            configurations.detachedConfiguration(*sources.toTypedArray())
                .resolvedConfiguration.lenientConfiguration.getFiles(Specs.SATISFIES_ALL)
        )
        into(File("some-directory"))
    }
}

Answer 2

this is not that straight forward as expected. The following snippet copies the source jars for all dependencies (runtime + compile) of a java project into a specific folder:

    task copySourceJars(type:Copy){
        def deps = configurations.runtime.incoming.dependencies.collect{ dependency ->
            dependency.artifact { artifact ->
                    artifact.name = dependency.name
                    artifact.type = 'source'
                    artifact.extension = 'jar'
                    artifact.classifier = 'sources'
                }
            dependency
        }
        from(configurations.detachedConfiguration(deps as Dependency[]).resolvedConfiguration.lenientConfiguration.getFiles(Specs.SATISFIES_ALL))
        into('sourceLibs')
    }

The reason we use a lenientConfiguration here is, that we don't want to fail if a source artifact cannot be resolved. There might be a more elegant way, but I havn't looked deeper into that.

hope it helps,

René

Answer 3

Rene answer will download sources jars of direct dependencies, not sources jars of all transitives dependencies.

Here is a task that will do the trick:

task copySourceJars( type: Copy ) {
  def sources = configurations.runtime.resolvedConfiguration.resolvedArtifacts.collect { artifact ->
    project.dependencies.create( [
      group: artifact.moduleVersion.id.group,
      name: artifact.moduleVersion.id.name,
      version: artifact.moduleVersion.id.version,
      classifier: 'sources'
    ] )
  }
  from configurations.detachedConfiguration( sources as Dependency[] )
    .resolvedConfiguration.lenientConfiguration.getFiles( Specs.SATISFIES_ALL )
  into file( 'some-directory/' )
}

One can then do the very same for javadocs jars by changing the classifier to javadoc.