Use short temp dirs names only in gradle integration tests

buildSrc/src/main/kotlin/tasks.kt

@@ -31,7 +31,12 @@ import java.lang.Character.isUpperCase
 import java.nio.file.Files
 import java.nio.file.Path
 
-fun Project.projectTest(taskName: String = "test", parallel: Boolean = false, body: Test.() -> Unit = {}): Test = getOrCreateTask(taskName) {
+fun Project.projectTest(
+    taskName: String = "test",
+    parallel: Boolean = false,
+    shortenTempRootName: Boolean = false,
+    body: Test.() -> Unit = {}
+): Test = getOrCreateTask(taskName) {
     doFirst {
         val commandLineIncludePatterns = (filter as? DefaultTestFilter)?.commandLineIncludePatterns ?: emptySet()
         val patterns = filter.includePatterns + commandLineIncludePatterns
@@ -110,12 +115,8 @@ fun Project.projectTest(taskName: String = "test", parallel: Boolean = false, bo
             (teamcity?.get("teamcity.build.tempDir") as? String)
                 ?: System.getProperty("java.io.tmpdir")
         systemTempRoot.let {
-            subProjectTempRoot = if (System.getProperty("os.name")!!.contains("Windows")) {
-                // Aapt2 from Android Gradle Plugin 3.2 and below does not handle long paths on Windows.
-                Files.createTempDirectory(File(systemTempRoot).toPath(), "")
-            } else {
-                Files.createTempDirectory(File(systemTempRoot).toPath(), project.name + "Project_" + taskName + "_")
-            }
+            val prefix = (project.name + "Project_" + taskName + "_").takeUnless { shortenTempRootName }
+            subProjectTempRoot = Files.createTempDirectory(File(systemTempRoot).toPath(), prefix)
             systemProperty("java.io.tmpdir", subProjectTempRoot.toString())
         }
     }

libraries/tools/kotlin-gradle-plugin-integration-tests/build.gradle.kts

@@ -44,10 +44,13 @@ dependencies {
     testCompileOnly(project(":kotlin-test:kotlin-test-common")) { isTransitive = false }
 }
 
-// additional configuration in tasks.withType<Test> below
-projectTest("test") {}
+// Aapt2 from Android Gradle Plugin 3.2 and below does not handle long paths on Windows.
+val shortenTempRootName = System.getProperty("os.name")!!.contains("Windows")
 
-projectTest("testAdvanceGradleVersion") {
+// additional configuration in tasks.withType<Test> below
+projectTest("test", shortenTempRootName = shortenTempRootName) {}
+
+projectTest("testAdvanceGradleVersion", shortenTempRootName = shortenTempRootName) {
     val gradleVersionForTests = "5.3-rc-2"
     systemProperty("kotlin.gradle.version.for.tests", gradleVersionForTests)
 }