Experimental sources publication in the PM2.0 prototype

libraries/tools/kotlin-gradle-plugin-api/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinGradleFragment.kt

@@ -14,6 +14,7 @@ import org.gradle.util.ConfigureUtil
 import org.jetbrains.kotlin.gradle.plugin.HasKotlinDependencies
 import org.jetbrains.kotlin.gradle.plugin.LanguageSettingsBuilder
 import org.jetbrains.kotlin.project.model.KotlinModuleFragment
+import org.jetbrains.kotlin.project.model.refinesClosure
 
 interface KotlinGradleFragment : KotlinModuleFragment, HasKotlinDependencies, Named {
     override val kotlinSourceRoots: SourceDirectorySet
@@ -49,3 +50,6 @@ interface KotlinGradleFragment : KotlinModuleFragment, HasKotlinDependencies, Na
                 // TODO: resolvable metadata configurations?
                 listOf(transitiveApiConfigurationName, transitiveImplementationConfigurationName)
 }
+
+val KotlinGradleFragment.refinesClosure: Set<KotlinGradleFragment>
+    get() = (this as KotlinModuleFragment).refinesClosure.mapTo(mutableSetOf()) { it as KotlinGradleFragment }

libraries/tools/kotlin-gradle-plugin-api/src/main/kotlin/org/jetbrains/kotlin/gradle/plugin/mpp/pm20/KotlinGradleVariant.kt

@@ -26,7 +26,7 @@ interface KotlinGradleVariant : KotlinGradleFragment, KotlinModuleVariant {
     val compilationOutputs: KotlinCompilationOutput
 
     // TODO rewrite using our own artifacts API
-    val sourceArchiveTask: TaskProvider<AbstractArchiveTask>
+    val sourceArchiveTaskName: String
 
     // TODO generalize exposing outputs: what if a variant has more than one such configurations or none?
     val apiElementsConfigurationName: String