ArtifactResolutionQuery

plugins {
    id 'java'
}

task resolveCompileSources {
    doLast {
        def componentIds = configurations.compileClasspath.incoming.resolutionResult.allDependencies.collect { it.selected.id }

        def result = dependencies.createArtifactResolutionQuery()
                                 .forComponents(componentIds)
                                 .withArtifacts(JvmLibrary, SourcesArtifact, JavadocArtifact)
                                 .execute()

        for (component in result.resolvedComponents) {
            component.getArtifacts(SourcesArtifact).each { println "Source artifact for ${component.id}: ${it.file}" }
        }
    }
}