tree 17545388d1507e44b1aa0cd5d351a1df5e5fb151
parent c13d29966f69e78a4741a5cff25033d792811be6
author Shawn O. Pearce <sop@google.com> 1231438085 -0800
committer Shawn O. Pearce <sop@google.com> 1231439701 -0800

Switch backup to use pickles over RPC instead of XML

The to_xml() method of a datastore entity updates the auto_now
date time fields.  This is a known bug:

  http://code.google.com/p/googleappengine/issues/detail?id=322

Since we cannot fix it we have to serialize everything in pickles
and then use the pickled format on the client side, which means we
also must import the GAE SDK.  I've hardcoded it to where it is on
my system, which is ../../google_appengine, aka a sibling of the
gerrit repo client.

Signed-off-by: Shawn O. Pearce <sop@google.com>