Make regexp match master, set builder_tag and don't run code to fetch editor on the master

tools/bots/functional_testing.py

 #!/usr/bin/python
 
 # Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """
 Buildbot steps for functional testing master and slaves
 """
 
 import os
 import re
 import shutil
 import sys
 
 import bot
 import bot_utils
 
 FT_BUILDER = r'ft-slave-(linux|mac)'
+FT_MASTER = r'ft-master'
 
 EDITOR_LOCATION='/home/chrome-bot/Desktop'
 
 def SrcConfig(name, is_buildbot):
   """Returns info for the current buildbot based on the name of the builder.
 
   - mode: always "release"
   - system: always "linux" or "mac"
   """
   pattern = re.match(FT_BUILDER, name)
-  if not pattern:
+  master_pattern = re.match(FT_MASTER, name)
+  if not pattern and not master_pattern:
     return None
-  return bot.BuildInfo('none', 'none', 'release', pattern.group(1))
+  if master_pattern:
+    tag = 'master'
+    system = 'linux'
+  else:
+    tag = 'slave'
+    system = pattern.group(1)
+  return bot.BuildInfo('none', 'none', 'release', system,
+                       builder_tag=tag)
 
 def Run(args):
   print "Running: %s" % ' '.join(args)
   sys.stdout.flush()
   bot.RunProcess(args)
 
 def FTSteps(config):
+  if config.builder_tag == 'master':
+    print 'Not doing anything on master for now'
+    return
   revision = int(os.environ['BUILDBOT_GOT_REVISION'])
   bot_name, _ = bot.GetBotName()
   print bot_name
   channel = bot_utils.GetChannelFromName(bot_name)
   namer = bot_utils.GCSNamer(channel=channel)
   system = config.system
   if system == 'mac':
     system = 'macos'
   editor_path = namer.editor_zipfilepath(revision, system, 'x64')
   gsutils = bot_utils.GSUtil()
   local_path = os.path.join(EDITOR_LOCATION, 'editor.zip')
   if os.path.exists(local_path):
     os.remove(local_path)
   local_extracted = os.path.join(EDITOR_LOCATION, 'dart')
   shutil.rmtree(local_extracted, ignore_errors=True)
   gsutils.execute(['cp', editor_path, local_path])
   Run(['unzip', local_path, '-d', EDITOR_LOCATION])
 
 if __name__ == '__main__':
-    bot.RunBot(SrcConfig, FTSteps)
+  bot.RunBot(SrcConfig, FTSteps)