depot_tools: Add git svn find-rev for safesync_url parsing (commonly LKGR link).

gclient_scm.py

Index: gclient_scm.py
===================================================================
--- gclient_scm.py	(revision 107077)
+++ gclient_scm.py	(working copy)
@@ -482,6 +482,10 @@
     base_url = self.url
     return base_url[:base_url.rfind('/')] + url
 
+  def Sha1FromSvnRevision(self, rev):
+    # Returns the git sha1 for the corresponding svn revision.
+    return self._Capture(['svn', 'find-rev', 'r' + rev]).split('\n')[-1]

[M-A Ruel, 2011/10/25 13:11:14]

return self._Capture(['svn', 'find-rev', 'r' + rev]).splitlines()[-1]

I feel like this should go in scm.py but gclient.py doesn't use this module
directly.

+
   def _Clone(self, revision, url, options):
     """Clone a git repository from the given URL.