If the destination directory doesn't contain the desired repo, delete it

gclient_scm.py

Index: gclient_scm.py
diff --git a/gclient_scm.py b/gclient_scm.py
index f5a434b1edaada44cfcc93e64cf897f2d3ca5ae7..ff889391055437b78c7220b74e4fdff556232605 100644
--- a/gclient_scm.py
+++ b/gclient_scm.py
@@ -9,6 +9,7 @@ import logging
 import os
 import posixpath
 import re
+import shlex
 import sys
 import tempfile
 import threading
@@ -215,6 +216,16 @@ class GitWrapper(SCMWrapper):
   def GetCheckoutRoot(self):
     return scm.GIT.GetCheckoutRoot(self.checkout_path)
 
+  def GetRemoteURL(self, options):
+    try:
+      remote_info = self._Capture(['remote', '-v'])
+    except (OSError, subprocess2.CalledProcessError):
+      return None
+    for line in remote_info.splitlines():
+      if line.startswith('origin'):
+        return shlex.split(line)[1]
+    return None
+
   def GetRevisionDate(self, _revision):
     """Returns the given revision's date in ISO-8601 format (which contains the
     time zone)."""
@@ -1077,6 +1088,21 @@ class SVNWrapper(SCMWrapper):
   def GetCheckoutRoot(self):
     return scm.SVN.GetCheckoutRoot(self.checkout_path)
 
+  def GetRemoteURL(self, options):
+    try:
+      if self.relpath:
+        cwd = os.path.join(self._root_dir, self.relpath)
+      else:
+        cwd = self._root_dir
+      svn_info = scm.SVN.Capture(['info', os.curdir], cwd)
+    except (OSError, subprocess2.CalledProcessError):
+      return None
+    url_prefix = 'URL: '
+    for line in svn_info.splitlines():
+      if line.startswith(url_prefix):
+        return line[len(url_prefix):].rstrip()
+    return None
+
   def GetRevisionDate(self, revision):
     """Returns the given revision's date in ISO-8601 format (which contains the
     time zone)."""