Temp directories, which reside under project root replaced with java.io.tmpdir based ones.

compiler/tests/org/jetbrains/jet/JetTestUtils.java

@@ -165,31 +165,16 @@ public class JetTestUtils {
         }
     }
 
-    public static void rmrf(File file) {
-        if (file != null) {
-            FileUtil.delete(file);
-        }
+    public static File tmpDirForTest(TestCase test) throws IOException {
+        File answer = FileUtil.createTempDirectory(test.getClass().getSimpleName(), test.getName());
+        deleteOnShutdown(answer);
+        return answer;
     }
     
-    public static File tmpRoot() {
-        return new File("tmp");
-    }
-    
-    public static File tmpDirForTest(TestCase test) {
-        return new File(tmpRoot(), test.getClass().getSimpleName() + "/" + test.getName());
-    }
-    
-    public static File tmpDirForTest(Class<?> clazz) {
-        return tmpDirForTest(clazz.getSimpleName());
-    }
-    
-    public static File tmpDirForTest(String name) {
-        return new File(tmpRoot(), name);
-    }
-
-    public static void recreateDirectory(File file) throws IOException {
-        rmrf(file);
-        mkdirs(file);
+    public static File tmpDir(String name) throws IOException {
+        File answer = FileUtil.createTempDirectory(name, "");
+        deleteOnShutdown(answer);
+        return answer;
     }
 
     public static void deleteOnShutdown(File file) {

compiler/tests/org/jetbrains/jet/codegen/ForTestCompileStdlib.java

@@ -30,8 +30,7 @@ public class ForTestCompileStdlib {
     private static File stdlibJarFile;
 
     private static File doCompile() throws Exception {
-        File tmpDir = FileUtil.createTempDirectory("stdlibjar", "");
-        JetTestUtils.deleteOnShutdown(tmpDir);
+        File tmpDir = JetTestUtils.tmpDir("stdlibjar");
 
         File jarFile = new File(tmpDir, "stdlib.jar");
         
@@ -119,7 +118,7 @@ public class ForTestCompileStdlib {
     
     public static File stdlibJarForTests() {
         synchronized (ForTestCompileStdlib.class) {
-            if (stdlibJarFile == null) {
+            if (stdlibJarFile == null || !stdlibJarFile.exists()) {
                 try {
                     stdlibJarFile = doCompile();
                 } catch (Exception e) {

compiler/tests/org/jetbrains/jet/compiler/CompileEnvironmentTest.java

@@ -66,8 +66,7 @@ public class CompileEnvironmentTest extends TestCase {
         File tempDir = FileUtil.createTempDirectory("compilerTest", "compilerTest");
         try {
             File out = new File(tempDir, "out");
-            File stdlib = new File(tempDir, "stdlib.jar");
-            FileUtil.copy(ForTestCompileStdlib.stdlibJarForTests(), stdlib);
+            File stdlib = ForTestCompileStdlib.stdlibJarForTests();
             KotlinCompiler.exec("-src", JetParsingTest.getTestDataDir() + "/compiler/smoke/Smoke.kt",
                                 "-output", out.getAbsolutePath(),
                                 "-stdlib", stdlib.getAbsolutePath());

compiler/tests/org/jetbrains/jet/compiler/TestCaseWithTmpdir.java

@@ -16,7 +16,6 @@ public abstract class TestCaseWithTmpdir extends UsefulTestCase {
     protected void setUp() throws Exception {
         super.setUp();
         tmpdir = JetTestUtils.tmpDirForTest(this);
-        JetTestUtils.recreateDirectory(tmpdir);
     }
 
 }