Merge branch 'stable'

* stable:
  Automatically install Gerrit Code Review's commit-msg hook
  Fail sync when encountering "N commits behind."
  Check that we are not overwriting a local repository when syncing.
  Honor url.insteadOf when setting up SSH control master connection
  sync: Fix split call on malformed email addresses
  Fixing project renaming bug.

Conflicts:
	hooks/commit-msg
	project.py
	subcmds/sync.py

Change-Id: I5eaf8fef8cbe4a95d124368112293a9ca64325bf

project.py

@@ -706,10 +706,9 @@ class Project(object):
           # commits are not yet merged upstream.  We do not want
           # to rewrite the published commits so we punt.
           #
-          syncbuf.info(self,
-                       "branch %s is published but is now %d commits behind",
-                       branch.name,
-                       len(upstream_gain))
+          syncbuf.fail(self,
+                       "branch %s is published (but not merged) and is now %d commits behind"
+                       % (branch.name, len(upstream_gain)))
         return
       elif pub == head:
         # All published commits are merged, and thus we are a
@@ -728,7 +727,7 @@ class Project(object):
     last_mine = None
     cnt_mine = 0
     for commit in local_changes:
-      commit_id, committer_email = commit.split(' ', 2)
+      commit_id, committer_email = commit.split(' ', 1)
       if committer_email == self.UserEmail:
         last_mine = commit_id
         cnt_mine += 1
@@ -1132,7 +1131,10 @@ class Project(object):
         dst = os.path.join(dotgit, name)
         if relink:
           os.remove(dst)
-        os.symlink(relpath(src, dst), dst)
+        if os.path.islink(dst) or not os.path.exists(dst):
+          os.symlink(relpath(src, dst), dst)
+        else:
+          raise GitError('cannot overwrite a local work tree')
       except OSError, e:
         if e.errno == errno.EPERM:
           raise GitError('filesystem must support symlinks')