Add resource locking in gclient

gclient.py

Index: gclient.py
diff --git a/gclient.py b/gclient.py
index 3569f8ebed154d6e4ddb54ac65393c7e5b6a6de8..5351b4782db25feca2c961cbf9b0ff7e62aebd2f 100755
--- a/gclient.py
+++ b/gclient.py
@@ -375,6 +375,11 @@ class Dependency(gclient_utils.WorkItem, DependencySettings):
     # It will be a dictionary of {deps_name: {"deps_file": depfile_name}} or
     # None.
     self.recursedeps = None
+    # This is inherited from WorkItem.  We want the URL to be a resource.
+    if url:
+      url_segments = url.split('@')

[Sergey Berezin, 2016/06/08 01:28:36]

I'm not sure I understand this part - what's the "schema" for the url here?

[hinoka, 2016/06/08 18:38:46]

Added comment.

+      if url_segments > 0:
+        self.resources.append(url_segments[0])
 
     if not self.name and self.parent:
       raise gclient_utils.Error('Dependency without name')