Add API for bootstrap and bot_code version

appengine/swarming/swarming_rpcs.py

 # Copyright 2015 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 """This module defines ProtoRPC types for the Swarming Server handlers."""
 
 from protorpc import message_types
 from protorpc import messages
 
 
@@ skipping 49 matching lines @@
   if three_state == ThreeStateBool.FALSE:
     return False
   if three_state == ThreeStateBool.TRUE:
     return True
 
 
 ### Server related.
 
 
 class ServerDetails(messages.Message):
-  """Reports the server version."""
+  """Reports details about the server."""
   server_version = messages.StringField(1)
+  bot_version = messages.StringField(2)
+
+
+class BootstrapToken(messages.Message):
+  """Returns a token to bootstrap a new bot."""
+  bootstrap_token = messages.StringField(1)
 
 
 class ClientPermissions(messages.Message):
   """Reports the client's permissions."""
   delete_bot = messages.BooleanField(1)
   terminate_bot = messages.BooleanField(2)
   get_configs = messages.BooleanField(3)
   put_configs = messages.BooleanField(4)
   cancel_task = messages.BooleanField(5)
   get_bootstrap_token = messages.BooleanField(6)
@@ skipping 427 matching lines @@
 
 
 class DeletedResponse(messages.Message):
   """Indicates whether a bot was deleted."""
   deleted = messages.BooleanField(1)
 
 
 class TerminateResponse(messages.Message):
   """Returns the pseudo taskid to wait for the bot to shut down."""
   task_id = messages.StringField(1)