tree c9effdc3a5d890ac55fb8a9f2aa68ac0d500873e
parent 9d8f914fe8ac75e18e0da2b7ce4886a2ba490fc6
author Anatol Pomazau <anatol@google.com> 1314318107 -0700
committer Shawn O. Pearce <sop@google.com> 1320350907 -0700

Add a sync flag that fetches only current branch

There is also shortcuts in case if the "current branch" is
a persistent revision such as tag or sha1. We check if the
persistent revision is present locally and if it does - do
no fetch anything from the server.

This greately reduces sync time and size of the on-disk repo

Change-Id: I23c6d95185474ed6e1a03c836a47f489953b99be