Support activating packages from local paths.

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

Index: sdk/lib/_internal/pub/test/global/activate/activate_path_after_hosted_test.dart
diff --git a/sdk/lib/_internal/pub/test/global/run/implicit_executable_name_test.dart b/sdk/lib/_internal/pub/test/global/activate/activate_path_after_hosted_test.dart
similarity index 51%
copy from sdk/lib/_internal/pub/test/global/run/implicit_executable_name_test.dart
copy to sdk/lib/_internal/pub/test/global/activate/activate_path_after_hosted_test.dart
index ad93bac7e2e8e346542b8c95f68b77347f1d4bd6..e0335183550f529fb65bf47b8b2bd3a0224cb2ef 100644
--- a/sdk/lib/_internal/pub/test/global/run/implicit_executable_name_test.dart
+++ b/sdk/lib/_internal/pub/test/global/activate/activate_path_after_hosted_test.dart
@@ -2,25 +2,35 @@
 // 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 '../../../lib/src/exit_codes.dart' as exit_codes;
 import '../../descriptor.dart' as d;
 import '../../test_pub.dart';
 
 main() {
   initConfig();
-  integration('defaults to the package name if the script is omitted', () {
+  integration('activating a hosted package deactivates the path one', () {
     servePackages([
       packageMap("foo", "1.0.0")
     ], contents: [
       d.dir("bin", [
-        d.file("foo.dart", "main(args) => print('foo');")
+        d.file("foo.dart", "main(args) => print('hosted');")
       ])
     ]);
 
+    d.dir("foo", [
+      d.libPubspec("foo", "2.0.0"),
+      d.dir("bin", [
+        d.file("foo.dart", "main() => print('path');")
+      ])
+    ]).create();
+
     schedulePub(args: ["global", "activate", "foo"]);
+    schedulePub(args: ["global", "activate", "-spath", "../foo"], output: """
+        Package foo is already active at version 1.0.0.
+        Activated foo 2.0.0.""");

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

It's weird that this doesn't indicate that it's switching sources. Maybe the
"already active" should indicate that it's from a hosted source if it's
switching to a non-hosted source?

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

Done. Active hosted packages just show the version number. Path ones will show
the path.

 
+    // Should now run the path one.
     var pub = pubRun(global: true, args: ["foo"]);
-    pub.stdout.expect("foo");
+    pub.stdout.expect("path");
     pub.shouldExit();
   });
 }