Support activating packages from local paths.

sdk/lib/_internal/pub/test/global/activate/git_package_test.dart

+// Copyright (c) 2014, 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.
+
+import '../../descriptor.dart' as d;
+import '../../test_pub.dart';
+
+main() {
+  initConfig();
+  integration('activates a package from a git repo', () {
+    ensureGit();
+
+    d.git('foo.git', [
+      d.libPubspec('foo', '1.0.0'),
+      d.dir("bin", [
+        d.file("foo.dart", "main() => print('ok');")
+      ])
+    ]).create();
+
+    schedulePub(args: ["global", "activate", "-sgit", "foo", "../foo.git"],

[nweiz, 2014/07/31 20:01:54]

Now I'm really confused. Where's the ref? What's this "foo" doing here?

[Bob Nystrom, 2014/08/04 23:41:51]

Killing git support in this patch.

+        output: """
+            Resolving dependencies...
+            Activated foo 1.0.0.""");
+  });
+}