Download d8 using configuration to make use of Gradle dependency caching

#KTI-72

gradle/verification-metadata.xml

@@ -2654,6 +2654,18 @@
             <sha256 value="39493c1da24d9f5f160cc3fb6670b9cad023e65ce12a6673af32e47ddcdeb8c3" origin="Generated by Gradle"/>
          </artifact>
       </component>
+      <component group="google.d8" name="v8" version="linux64-rel-11.5.99">
+         <artifact name="v8-linux64-rel-11.5.99.zip">
+            <md5 value="c929047b03bf3ddeeffbe7d66c4b83b6" origin="Generated by Gradle"/>
+            <sha256 value="80a2e94cc3606e978dc84516520d75a912c7a9b6d9fab4d520441db384ac34fc" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
+      <component group="google.d8" name="v8" version="win64-rel-11.5.99">
+         <artifact name="v8-win64-rel-11.5.99.zip">
+            <md5 value="1f5984db3f35be3231dffaf7d64ff4e9" origin="Generated by Gradle"/>
+            <sha256 value="edd5199cd6fb8bdf5798a1d108bd7b85da11ba72c28702bb96181212825404bb" origin="Generated by Gradle"/>
+         </artifact>
+      </component>
       <component group="gradle.plugin.com.github.johnrengelman" name="shadow" version="7.1.2">
          <artifact name="shadow-7.1.2.jar">
             <md5 value="0e152cbfd964889d83033c1071488e31" origin="Generated by Gradle"/>

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/d8/D8Env.kt

@@ -10,5 +10,6 @@ data class D8Env(
     val targetPath: File,
     val executablePath: File,
     val isWindows: Boolean,
-    val downloadUrl: URL
+    val downloadUrl: URL,
+    val ivyDependency: String
 )

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/d8/D8RootExtension.kt

@@ -60,7 +60,8 @@ open class D8RootExtension(@Transient val rootProject: Project) : ConfigurationP
             targetPath = targetPath,
             executablePath = targetPath.resolve(if (isWindows) "d8.exe" else "d8"),
             isWindows = isWindows,
-            downloadUrl = URL("${downloadBaseUrl.trimEnd('/')}/$requiredZipName"),
+            downloadUrl = URL(downloadBaseUrl),
+            ivyDependency = "google.d8:v8:${D8Platform.platform}-$edition-$version@zip"
         )
     }
 

libraries/tools/kotlin-gradle-plugin/src/common/kotlin/org/jetbrains/kotlin/gradle/targets/js/d8/D8RootPlugin.kt

@@ -5,16 +5,17 @@
 
 package org.jetbrains.kotlin.gradle.targets.js.d8
 
-import de.undercouch.gradle.tasks.download.Download
 import org.gradle.api.Plugin
 import org.gradle.api.Project
 import org.gradle.api.plugins.BasePlugin
 import org.gradle.api.tasks.Copy
+import org.jetbrains.kotlin.gradle.plugin.whenEvaluated
 import org.jetbrains.kotlin.gradle.targets.js.MultiplePluginDeclarationDetector
 import org.jetbrains.kotlin.gradle.targets.js.d8.D8RootExtension.Companion.EXTENSION_NAME
 import org.jetbrains.kotlin.gradle.tasks.CleanDataTask
 import org.jetbrains.kotlin.gradle.tasks.registerTask
 
+
 open class D8RootPlugin : Plugin<Project> {
     override fun apply(project: Project) {
         MultiplePluginDeclarationDetector.detect(project)
@@ -27,13 +28,27 @@ open class D8RootPlugin : Plugin<Project> {
 
         val settings = project.extensions.create(EXTENSION_NAME, D8RootExtension::class.java, project)
 
-        val downloadTask = project.registerTask<Download>("${TASKS_GROUP_NAME}Download") {
-            val env = settings.requireConfigured()
+        project.gradle.projectsEvaluated {
+            val downloadUrl = settings.requireConfigured().downloadUrl
+            project.repositories.ivy { repo ->
+                repo.name = "D8 Distributions at $downloadUrl"
+                repo.url = downloadUrl.toURI()
+                repo.patternLayout {
+                    it.artifact("[artifact]-[revision].[ext]")
+                }
+                repo.metadataSources { it.artifact() }
+                repo.content { it.includeModule("google.d8", "v8") }
+            }
+        }
+
+        val downloadTask = project.registerTask<Copy>("${TASKS_GROUP_NAME}Download") {
             it.group = TASKS_GROUP_NAME
-            it.src(env.downloadUrl)
-            it.dest(env.zipPath)
-            it.overwrite(false)
             it.description = "Download local d8 version"
+
+            val env = settings.requireConfigured()
+            val configuration = project.configurations.detachedConfiguration(project.dependencies.create(env.ivyDependency))
+            it.from(project.provider { configuration.singleFile })
+            it.into(env.zipPath.parentFile)
         }
 
         project.registerTask<Copy>(INSTALL_TASK_NAME) {