Fix logdog_wrapper to not upload if logdog binary does not exist.

build/android/pylib/utils/logdog_helper.py

 # Copyright 2017 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Helper functions to upload data to logdog."""
 
 import logging
 import os
 import sys
 
 from pylib import constants
 from pylib.utils import decorators
 
 sys.path.insert(0, os.path.abspath(os.path.join(
     constants.DIR_SOURCE_ROOT, 'tools', 'swarming_client')))
 from libs.logdog import bootstrap # pylint: disable=import-error
 
 
-@decorators.NoRaiseException(default_return_value='')
+@decorators.NoRaiseException(default_return_value='',
+                             exception_message='Ignore this exception.')

[mikecase (-- gone --), 2017/04/26 20:59:49]

nit: I would link a crbug here with some context.

[BigBossZhiling, 2017/04/26 21:24:07]

Done.

 def text(name, data):
   """Uploads text to logdog.
 
   Args:
     name: Name of the logdog stream.
     data: String with data you want to upload.
 
   Returns:
     Link to view uploaded text in logdog viewer.
   """
   logging.info('Writing text to logdog stream, %s', name)
   with get_logdog_client().text(name) as stream:
     stream.write(data)
     return stream.get_viewer_url()
 
 
-@decorators.NoRaiseException(default_return_value=None)
+@decorators.NoRaiseException(default_return_value=None,
+                             exception_message='Ignore this exception.')
 def open_text(name):
   """Returns a file like object which you can write to.
 
   Args:
     name: Name of the logdog stream.
 
   Returns:
     A file like object. close() file when done.
   """
   logging.info('Opening text logdog stream, %s', name)
   return get_logdog_client().open_text(name)
 
 
-@decorators.NoRaiseException(default_return_value='')
+@decorators.NoRaiseException(default_return_value='',
+                             exception_message='Ignore this exception.')
 def binary(name, binary_path):
   """Uploads binary to logdog.
 
   Args:
     name: Name of the logdog stream.
     binary_path: Path to binary you want to upload.
 
   Returns:
     Link to view uploaded binary in logdog viewer.
   """
   logging.info('Writing binary to logdog stream, %s', name)
   with get_logdog_client().binary(name) as stream:
     with open(binary_path, 'r') as f:
       stream.write(f.read())
       return stream.get_viewer_url()
 
 
-@decorators.NoRaiseException(default_return_value='')
+@decorators.NoRaiseException(default_return_value='',
+                             exception_message='Ignore this exception.')
 def get_viewer_url(name):
   """Get Logdog viewer URL.
 
   Args:
     name: Name of the logdog stream.
 
   Returns:
     Link to view uploaded binary in logdog viewer.
   """
   return get_logdog_client().get_viewer_url(name)
 
 
 @decorators.Memoize
 def get_logdog_client():
   logging.info('Getting logdog client.')
   return bootstrap.ButlerBootstrap.probe().stream_client()