Add test for multiplatform projects with Gradle Kotlin DSL

* Adjust some of the test tools to work with *.kts scripts
* Expose the tool for version substitution into plugins DSL and use it
* Transform the lib-and-app test case to Gradle Kotlin DSL

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/BaseGradleIT.kt

@@ -22,7 +22,7 @@ abstract class BaseGradleIT {
 
     protected open fun defaultBuildOptions(): BuildOptions = BuildOptions(withDaemon = true)
 
-    protected open val defaultGradleVersion: GradleVersionRequired
+    open val defaultGradleVersion: GradleVersionRequired
         get() = GradleVersionRequired.None
 
     @Before
@@ -532,7 +532,14 @@ abstract class BaseGradleIT {
         createGradleCommand(wrapperDir, createGradleTailParameters(options, params))
 
     fun Project.gradleBuildScript(subproject: String? = null): File =
-        File(projectDir, subproject?.plus("/").orEmpty() + "build.gradle")
+        listOf("build.gradle", "build.gradle.kts").mapNotNull {
+            File(projectDir, subproject?.plus("/").orEmpty() + it).takeIf(File::exists)
+        }.single()
+
+    fun Project.gradleSettingsScript(): File =
+        listOf("settings.gradle", "settings.gradle.kts").mapNotNull {
+            File(projectDir, it).takeIf(File::exists)
+        }.single()
 
     private fun Project.createGradleTailParameters(options: BuildOptions, params: Array<out String> = arrayOf()): List<String> =
         params.toMutableList().apply {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/NewMultiplatformIT.kt

@@ -35,10 +35,23 @@ class NewMultiplatformIT : BaseGradleIT() {
         classesDir(sourceSet = "$targetName/$sourceSetName")
 
     @Test
-    fun testLibAndApp() {
-        val libProject = Project("sample-lib", gradleVersion, "new-mpp-lib-and-app")
-        val appProject = Project("sample-app", gradleVersion, "new-mpp-lib-and-app")
-        val oldStyleAppProject = Project("sample-old-style-app", gradleVersion, "new-mpp-lib-and-app")
+    fun testLibAndApp() = doTestLibAndApp(
+        "sample-lib",
+        "sample-app",
+        gradleVersion
+    )
+
+    @Test
+    fun testLibAndAppWithGradleKotlinDsl() = doTestLibAndApp(
+        "sample-lib-gradle-kotlin-dsl",
+        "sample-app-gradle-kotlin-dsl",
+        GradleVersionRequired.AtLeast("4.10.2") // Using a SNAPSHOT version in the plugins DSL requires 4.10
+    )
+
+    fun doTestLibAndApp(libProjectName: String, appProjectName: String, gradleVersionRequired: GradleVersionRequired) {
+        val libProject = transformProjectWithPluginsDsl(libProjectName, gradleVersionRequired, "new-mpp-lib-and-app")
+        val appProject = transformProjectWithPluginsDsl(appProjectName, gradleVersionRequired, "new-mpp-lib-and-app")
+        val oldStyleAppProject = Project("sample-old-style-app", gradleVersionRequired, "new-mpp-lib-and-app")
 
         val compileTasksNames =
             listOf("Jvm6", "NodeJs", "Metadata", "Wasm32", nativeHostTargetName.capitalize()).map { ":compileKotlin$it" }
@@ -94,7 +107,7 @@ class NewMultiplatformIT : BaseGradleIT() {
 
         with(appProject) {
             setupWorkingDir()
-            gradleBuildScript().appendText("\nrepositories { maven { url '$libLocalRepoUri' } }")
+            gradleBuildScript().appendText("\nrepositories { maven { setUrl(\"$libLocalRepoUri\") } }")
 
             fun CompiledProject.checkAppBuild() {
                 assertSuccessful()
@@ -141,8 +154,12 @@ class NewMultiplatformIT : BaseGradleIT() {
 
             // Now run again with a project dependency instead of a module one:
             libProject.projectDir.copyRecursively(projectDir.resolve(libProject.projectDir.name))
-            projectDir.resolve("settings.gradle").appendText("\ninclude '${libProject.projectDir.name}'")
-            gradleBuildScript().modify { it.replace("'com.example:sample-lib:1.0'", "project(':${libProject.projectDir.name}')") }
+            gradleSettingsScript().appendText("\ninclude(\"${libProject.projectDir.name}\")")
+            gradleBuildScript().modify { it.replace("\"com.example:sample-lib:1.0\"", "project(\":${libProject.projectDir.name}\")") }
+
+            gradleBuildScript(libProjectName).takeIf { it.extension == "kts" }?.modify {
+                it.replace(Regex("""\.version\(.*\)"""), "")
+            }
 
             build("clean", "assemble", "--rerun-tasks") {
                 checkAppBuild()

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/PluginsDslIT.kt

@@ -3,7 +3,6 @@ package org.jetbrains.kotlin.gradle
 import org.gradle.api.logging.LogLevel
 import org.jetbrains.kotlin.gradle.util.modify
 import org.junit.Assert
-import org.junit.AssumptionViolatedException
 import org.junit.Test
 import java.io.File
 import javax.xml.parsers.DocumentBuilderFactory
@@ -54,43 +53,42 @@ class PluginsDslIT : BaseGradleIT() {
         private val GRADLE_VERSION = GradleVersionRequired.AtLeast("4.0")
         private const val DIRECTORY_PREFIX = "pluginsDsl"
 
-        private const val MAVEN_LOCAL_URL_PLACEHOLDER = "<mavenLocalUrl>"
-        private const val PLUGIN_MARKER_VERSION_PLACEHOLDER = "<pluginMarkerVersion>"
+        private fun BaseGradleIT.projectWithMavenLocalPlugins(
+            projectName: String,
+            wrapperVersion: GradleVersionRequired = GRADLE_VERSION,
+            directoryPrefix: String? = DIRECTORY_PREFIX,
+            minLogLevel: LogLevel = LogLevel.DEBUG
+        ): Project = transformProjectWithPluginsDsl(projectName, wrapperVersion, directoryPrefix, minLogLevel)
+    }
+}
 
-        // Workaround for the restriction that snapshot versions are not supported
-        private val MARKER_VERSION = KOTLIN_VERSION + (System.getProperty("pluginMarkerVersionSuffix") ?: "")
+private const val MAVEN_LOCAL_URL_PLACEHOLDER = "<mavenLocalUrl>"
+private const val PLUGIN_MARKER_VERSION_PLACEHOLDER = "<pluginMarkerVersion>"
+
+internal fun BaseGradleIT.transformProjectWithPluginsDsl(
+    projectName: String,
+    wrapperVersion: GradleVersionRequired = defaultGradleVersion,
+    directoryPrefix: String? = null,
+    minLogLevel: LogLevel = LogLevel.DEBUG
+): BaseGradleIT.Project {
+
+    val result = Project(projectName, wrapperVersion, directoryPrefix, minLogLevel)
+    result.setupWorkingDir()
+
+    val settingsGradle = File(result.projectDir, "settings.gradle").takeIf(File::exists)
+    settingsGradle?.modify {
+        it.replace(MAVEN_LOCAL_URL_PLACEHOLDER, MavenLocalUrlProvider.mavenLocalUrl)
     }
 
-    private fun projectWithMavenLocalPlugins(
-        projectName: String,
-        wrapperVersion: GradleVersionRequired = GRADLE_VERSION,
-        directoryPrefix: String? = DIRECTORY_PREFIX,
-        minLogLevel: LogLevel = LogLevel.DEBUG
-    ): Project {
-
-        val result = Project(projectName, wrapperVersion, directoryPrefix, minLogLevel)
-        result.setupWorkingDir()
-
-        val settingsGradle = File(result.projectDir, "settings.gradle")
-        settingsGradle.modify {
-            val mavenLocalUrl = MavenLocalUrlProvider.mavenLocalUrl
-
-            it.replace(MAVEN_LOCAL_URL_PLACEHOLDER, mavenLocalUrl).apply {
-                if (this == it)
-                    throw AssumptionViolatedException("$MAVEN_LOCAL_URL_PLACEHOLDER placeholder not found in settings.gradle")
+    result.projectDir.walkTopDown()
+        .filter { it.isFile && (it.name == "build.gradle" || it.name == "build.gradle.kts") }
+        .forEach { buildGradle ->
+            buildGradle.modify { text ->
+                text.replace(PLUGIN_MARKER_VERSION_PLACEHOLDER, KOTLIN_VERSION)
             }
         }
 
-        result.projectDir.walkTopDown()
-            .filter { it.isFile && it.name == "build.gradle" }
-            .forEach { buildGradle ->
-                buildGradle.modify { text ->
-                    text.replace(PLUGIN_MARKER_VERSION_PLACEHOLDER, MARKER_VERSION)
-                }
-            }
-
-        return result
-    }
+    return result
 }
 
 /** Copies the logic of Gradle [`mavenLocal()`](https://docs.gradle.org/3.4.1/dsl/org.gradle.api.artifacts.dsl.RepositoryHandler.html#org.gradle.api.artifacts.dsl.RepositoryHandler:mavenLocal())

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-app-gradle-kotlin-dsl/build.gradle.kts

@@ -0,0 +1,70 @@
+import org.jetbrains.kotlin.gradle.plugin.mpp.NativeOutputKind.EXECUTABLE
+
+plugins {
+	id("org.jetbrains.kotlin.multiplatform").version("<pluginMarkerVersion>")
+	id("maven-publish")
+}
+
+group = "com.example"
+version = "1.0"
+
+repositories {
+    mavenLocal()
+    jcenter()
+    maven { setUrl("http://dl.bintray.com/kotlin/kotlinx.html/") }
+}
+
+kotlin {
+	val jvm6 = jvm("jvm6")
+	val jvm8 = jvm("jvm8") {
+		compilations["main"].kotlinOptions.jvmTarget = "1.8"
+	}
+	val nodeJs = js("nodeJs")
+	val wasm32 = wasm32()
+	val linux64 = linuxX64("linux64")
+	val mingw64 = mingwX64("mingw64")
+	val macos64 = macosX64("macos64")
+
+    configure(listOf(wasm32, linux64, mingw64, macos64)) {
+    	compilations.getByName("main") {
+	    	outputKinds.add(EXECUTABLE)
+	        entryPoint = "com.example.app.native.main"
+	    }
+    }
+
+    sourceSets {
+        val commonMain by getting {
+            dependencies {
+                implementation("com.example:sample-lib:1.0")
+            }
+        }
+        val allJvm by creating {
+            dependsOn(commonMain)
+            dependencies {
+                implementation("org.jetbrains.kotlin:kotlin-stdlib")
+            }
+        }
+        jvm6.compilations["main"].defaultSourceSet {
+            dependsOn(allJvm)
+        }
+        jvm8.compilations["main"].defaultSourceSet {
+            dependsOn(allJvm)
+            dependencies {
+                implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
+            }
+        }
+        nodeJs.compilations["main"].defaultSourceSet {
+            dependencies {
+                implementation("org.jetbrains.kotlin:kotlin-stdlib-js")
+            }
+        }
+    }
+}
+
+tasks.create("resolveRuntimeDependencies", DefaultTask::class.java) {
+    doFirst { 
+        // KT-26301
+        val configName = kotlin.jvm("jvm6").compilations["main"].runtimeDependencyConfigurationName
+        configurations[configName].resolve()
+    }
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-app-gradle-kotlin-dsl/settings.gradle.kts

@@ -0,0 +1,11 @@
+rootProject.name = "sample-app"
+
+enableFeaturePreview("GRADLE_METADATA")
+
+pluginManagement {
+	repositories {
+		mavenLocal()
+		jcenter()
+		gradlePluginPortal()
+	}
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-app-gradle-kotlin-dsl/src/allJvm/kotlin/useBothIds.kt

@@ -0,0 +1,9 @@
+package com.example.app
+
+import com.example.lib.*
+
+fun main(args: Array<String>) {
+    println(id(123))
+    println(idUsage(456))
+    println(x())
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-app-gradle-kotlin-dsl/src/commonMain/kotlin/A.kt

@@ -0,0 +1,10 @@
+package com.example.app
+
+import com.example.lib.id
+import com.example.lib.expectedFun
+
+fun idUsage(x: Int): Int = id(x)
+
+fun main(args: Array<String>) {
+	expectedFun()
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-app-gradle-kotlin-dsl/src/jvm8Main/kotlin/Jdk8ApiUsage.kt

@@ -0,0 +1,5 @@
+package com.example.app
+
+import kotlin.streams.asStream
+
+fun useJdk8Api() = listOf(1, 2, 3).asSequence().asStream()

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-app-gradle-kotlin-dsl/src/linux64Main/kotlin/linux64App.kt

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package com.example.app.native
+
+import com.example.lib.*
+
+fun main(args: Array<String>) {
+    id(id(123))
+    expectedFun()
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-app-gradle-kotlin-dsl/src/macos64Main/kotlin/macos64App.kt

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package com.example.app.native
+
+import com.example.lib.*
+
+fun main(args: Array<String>) {
+    id(id(123))
+    expectedFun()
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-app-gradle-kotlin-dsl/src/mingw64Main/kotlin/mingw64App.kt

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package com.example.app.native
+
+import com.example.lib.*
+
+fun main(args: Array<String>) {
+    id(id(123))
+    expectedFun()
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-app-gradle-kotlin-dsl/src/nodeJsMain/kotlin/KotlinJsUsage.kt

@@ -0,0 +1,9 @@
+import kotlin.js.Console
+
+import com.example.lib.*
+
+external val console: Console
+
+fun nodeJsMain(args: Array<String>) {
+	console.info(id(123), idUsage(), expectedFun())
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-app-gradle-kotlin-dsl/src/wasm32Main/kotlin/wasm32App.kt

@@ -0,0 +1,13 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package com.example.app.native
+
+import com.example.lib.*
+
+fun main(args: Array<String>) {
+    id(id(123))
+    expectedFun()
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/build.gradle.kts

@@ -0,0 +1,56 @@
+plugins {
+	id("org.jetbrains.kotlin.multiplatform").version("<pluginMarkerVersion>")
+	id("maven-publish")
+}
+
+group = "com.example"
+version = "1.0"
+
+repositories {
+    mavenLocal()
+    jcenter()
+    maven { setUrl("http://dl.bintray.com/kotlin/kotlinx.html/") }
+}
+
+kotlin {
+    val jvm = jvm("jvm6")
+    val js = js("nodeJs")
+    wasm32()
+    linuxX64("linux64")
+    mingwX64("mingw64")
+    macosX64("macos64")
+      
+    targets.all {
+        mavenPublication {
+            pom.withXml {
+                asNode().appendNode("name", "Sample MPP library")
+            }
+        }
+    }
+
+    sourceSets {
+        val commonMain by getting {
+            dependencies {
+                api("org.jetbrains.kotlin:kotlin-stdlib-common")
+            }
+        }
+        jvm.compilations["main"].defaultSourceSet {
+            dependencies {
+                api("org.jetbrains.kotlin:kotlin-stdlib")
+                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:0.23.4")
+            }
+        }
+        js.compilations["main"].defaultSourceSet {
+        	dependencies {
+                api("org.jetbrains.kotlin:kotlin-stdlib-js")
+        		implementation("org.jetbrains.kotlinx:kotlinx-html-js:0.6.11")
+        	}
+        }
+    }
+}
+
+publishing {
+	repositories {
+		maven { setUrl("file://${projectDir.absolutePath.replace('\\', '/')}/repo") }
+	}
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/settings.gradle.kts

@@ -0,0 +1,11 @@
+rootProject.name = "sample-lib"
+
+enableFeaturePreview("GRADLE_METADATA")
+
+pluginManagement {
+	repositories {
+		mavenLocal()
+		jcenter()
+		gradlePluginPortal()
+	}
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/commonMain/kotlin/Common.kt

@@ -0,0 +1,5 @@
+package com.example.lib
+
+fun <T> id(t: T): T = t
+
+expect fun expectedFun(): Unit

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/commonMain/resources/commonMainResource.txt

@@ -0,0 +1 @@
+resource

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/jvm6Main/kotlin/Main.kt

@@ -0,0 +1,7 @@
+package com.example.lib
+
+fun x(): String = "x"
+
+actual fun expectedFun() {
+	println(id(x()))
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/jvm6Main/resources/jvm6MainResource.txt

@@ -0,0 +1 @@
+resource

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/linux64Main/kotlin/Main.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package com.example.lib
+
+actual fun expectedFun(): Unit {
+    id(123)
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/linux64Main/resources/linux64MainResource.txt

@@ -0,0 +1 @@
+resource

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/macos64Main/kotlin/Main.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package com.example.lib
+
+actual fun expectedFun(): Unit {
+    id(123)
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/macos64Main/resources/macos64MainResource.txt

@@ -0,0 +1 @@
+resource

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/mingw64Main/kotlin/Main.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package com.example.lib
+
+actual fun expectedFun(): Unit {
+    id(123)
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/mingw64Main/resources/mingw64MainResource.txt

@@ -0,0 +1 @@
+resource

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/nodeJsMain/kotlin/Main.kt

@@ -0,0 +1,12 @@
+package com.example.lib
+
+import com.example.lib.id
+import com.example.lib.expectedFun
+
+fun idUsage() = id("123")
+
+actual fun expectedFun() = Unit
+
+fun main(args: Array<String>) {
+	expectedFun()
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/nodeJsMain/resources/nodeJsMainResource.txt

@@ -0,0 +1 @@
+resource

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/wasm32Main/kotlin/Main.kt

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+package com.example.lib
+
+actual fun expectedFun(): Unit {
+    id(123)
+}

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/new-mpp-lib-and-app/sample-lib-gradle-kotlin-dsl/src/wasm32Main/resources/wasm32MainResource.txt

@@ -0,0 +1 @@
+resource