fix dartanalyzer find options in bazel workspace

pkg/analyzer_cli/test/utils.dart

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library analyzer_cli.test.utils;
 
+import 'dart:async';
 import 'dart:io';
 import 'dart:mirrors';
 
 import 'package:analyzer/analyzer.dart';
 import 'package:path/path.dart' as pathos;
 
 /// Gets the test directory in a way that works with package:test
 /// See <https://github.com/dart-lang/test/issues/110> for more info.
 final String testDirectory = pathos.dirname(
     pathos.fromUri((reflectClass(_TestUtils).owner as LibraryMirror).uri));
@@ skipping 28 matching lines @@
 /// Returns the return value of [fn].
 dynamic withTempDir(fn(String path)) {
   var tempDir = Directory.systemTemp.createTempSync('analyzer_').path;
   try {
     return fn(tempDir);
   } finally {
     new Directory(tempDir).deleteSync(recursive: true);
   }
 }
 
+/// Creates a temporary directory and passes its path to [fn]. Once [fn]
+/// completes, the temporary directory and all its contents will be deleted.
+///
+/// Returns the return value of [fn].
+Future<dynamic> withTempDirAsync(Future<dynamic> fn(String path)) async {
+  var tempDir = (await Directory.systemTemp.createTemp('analyzer_')).path;
+  try {
+    return await fn(tempDir);
+  } finally {
+    await new Directory(tempDir).delete(recursive: true);
+  }
+}
+
+/// Recursively copy the specified [src] directory (or file)
+/// to the specified destination path.
+Future<Null> recursiveCopy(FileSystemEntity src, String dstPath) async {
+  if (src is Directory) {
+    await (new Directory(dstPath)).create(recursive: true);
+    for (FileSystemEntity entity in src.listSync()) {
+      await recursiveCopy(
+          entity, pathos.join(dstPath, pathos.basename(entity.path)));
+    }
+  } else if (src is File) {
+    await src.copy(dstPath);
+  }
+}
+
 class _TestUtils {}