Shade shared classes in the gradle-plugin fat jar

tools/kotlin-native-gradle-plugin/build.gradle

@@ -112,6 +112,7 @@ shadowJar {
     classifier = null
     relocate('org.jetbrains.kotlinx', 'shadow.org.jetbrains.kotlinx')
     relocate('org.jetbrains.kotlin.compilerRunner', 'shadow.org.jetbrains.kotlin.compilerRunner')
+    relocate('org.jetbrains.kotlin.konan', 'shadow.org.jetbrains.kotlin.konan')
     relocate('org.jetbrains.kotlin.gradle', 'shadow.org.jetbrains.kotlin.gradle') {
         exclude('org.jetbrains.kotlin.gradle.plugin.experimental.**')
         exclude('org.jetbrains.kotlin.gradle.plugin.konan.**')
@@ -157,10 +158,6 @@ pluginUnderTestMetadata {
 
 test {
     dependsOn shadowJar
-    classpath = configurations.testRuntimeClasspath +
-            sourceSets.test.output +
-            files(shadowJar.archivePath) +
-            configurations.shadow
     systemProperty("kotlin.version", kotlinVersion)
     systemProperty("kotlin.repo", kotlinCompilerRepo)
     if (project.hasProperty("konan.home")) {

tools/kotlin-native-gradle-plugin/src/test/kotlin/ExperimentalPluginTests.kt

@@ -847,23 +847,40 @@ class ExperimentalPluginTests {
 
     @Test
     fun `Plugin should provide a correct serialization compiler plugin`() {
-        withProject {
-            pluginManager.apply("kotlinx-serialization-native")
-            repositories.apply {
-                jcenter()
-                maven { it.setUrl("http://kotlin.bintray.com/kotlin-eap") }
-                maven { it.setUrl("http://kotlin.bintray.com/kotlin-dev") }
-                maven { it.setUrl(MultiplatformSpecification.KOTLIN_REPO) }
-            }
-            evaluate()
-            tasks.withType(KotlinNativeCompile::class.java).all {
-                val compileClassPath = it.compilerPluginClasspath
-                assertNotNull(compileClassPath)
-                val files = compileClassPath.files
-                assertTrue(files.isNotEmpty(), "No compiler plugins in the classpath")
-                assertEquals(1, files.size, "More than one compiler plugin in the classpath")
-                assertTrue(files.single().absolutePath.contains("kotlin-serialization-unshaded"), "No unshaded version of serialization plugin in the classpath")
-            }
+        val project = KonanProject.createEmpty(projectDirectory).apply {
+            buildFile.writeText("""
+                import org.jetbrains.kotlin.gradle.plugin.experimental.tasks.KotlinNativeCompile
+
+                plugins {
+                    id 'kotlin-native'
+                    id 'kotlinx-serialization-native'
+                }
+
+                repositories {
+                    maven { url "http://kotlin.bintray.com/kotlin-eap" }
+                    maven { url "http://kotlin.bintray.com/kotlin-dev" }
+                    maven { url "${MultiplatformSpecification.KOTLIN_REPO}" }
+                }
+
+                def assertTrue(boolean cond, String message) {
+                    if (!cond) {
+                        throw AssertionError(message)
+                    }
+                }
+
+                task assertClassPath {
+                    doLast {
+                        tasks.withType(KotlinNativeCompile.class).all {
+                            def compileClassPath = it.compilerPluginClasspath
+                            assertTrue(compileClassPath != null, "compileClassPath should not be null")
+                            assertTrue(!compileClassPath.isEmpty(), "No compiler plugins in the classpath")
+                            assertTrue(compileClassPath.singleFile.absolutePath.contains("kotlin-serialization-unshaded"),
+                                        "No unshaded version of serialization plugin in the classpath")
+                        }
+                    }
+                }
+            """.trimIndent())
         }
+        project.createRunner().withArguments("assertClassPath").build()
     }
 }

tools/kotlin-native-gradle-plugin/src/test/kotlin/ToolingModelTests.kt

@@ -129,7 +129,7 @@ open class ToolingModelTests {
                 }
 
                 import org.jetbrains.kotlin.gradle.plugin.model.*
-                import org.jetbrains.kotlin.konan.target.CompilerOutputKind
+                import shadow.org.jetbrains.kotlin.konan.target.CompilerOutputKind
 
                 public <T> void assertEquals(
                         T actual,