Use relative symlinks for self links and secondary "packages" dirs.

utils/tests/pub/install/relative_symlink_test.dart

Index: utils/tests/pub/install/relative_symlink_test.dart
diff --git a/utils/tests/pub/install/relative_symlink_test.dart b/utils/tests/pub/install/relative_symlink_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..166a7caa0636c833037fb031b2dc71da486b4f34
--- /dev/null
+++ b/utils/tests/pub/install/relative_symlink_test.dart
@@ -0,0 +1,62 @@
+// Copyright (c) 2012, 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 pub_tests;
+
+import 'dart:io';
+
+import '../../../../pkg/unittest/lib/unittest.dart';
+import '../test_pub.dart';
+
+main() {
+  // Pub uses NTFS junction points to create links in the packages directory.
+  // These (unlike the symlinks that are supported in Vista and later) do not
+  // support relative paths. So this test, by design, will not pass on Windows.
+  // So just skip it.
+  if (Platform.operatingSystem == "windows") return;
+
+  initConfig();
+  integration('uses a relative symlink for the self link', () {
+    dir(appPath, [
+      appPubspec([]),
+      libDir('foo')
+    ]).scheduleCreate();
+
+    schedulePub(args: ['install'],
+        output: new RegExp(r"Dependencies installed!$"));
+
+    scheduleRename(appPath, "moved");
+
+    dir("moved", [
+      dir("packages", [
+        dir("myapp", [
+          file('foo.dart', 'main() => "foo";')
+        ])
+      ])
+    ]).scheduleValidate();
+  });
+
+  integration('uses a relative symlink for secondary packages directory', () {
+    dir(appPath, [
+      appPubspec([]),
+      libDir('foo'),
+      dir("bin")
+    ]).scheduleCreate();
+
+    schedulePub(args: ['install'],
+        output: new RegExp(r"Dependencies installed!$"));
+
+    scheduleRename(appPath, "moved");
+
+    dir("moved", [
+      dir("bin", [
+        dir("packages", [
+          dir("myapp", [
+            file('foo.dart', 'main() => "foo";')
+          ])
+        ])
+      ])
+    ]).scheduleValidate();
+  });
+}