Initial refactorings to support archiving the src and debian package builds.

tools/bots/bot.py

 #!/usr/bin/python
 
 # Copyright (c) 2012, 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.
 
 """
 Shared code for use in the buildbot scripts.
 """
 
@@ skipping 167 matching lines @@
     return args.name, False
 
   name = os.environ.get(BUILDER_NAME)
   if not name:
     print 'Use -n $BUILDBOT_NAME for the bot you would like to emulate.'
     sys.exit(1)
 
   return name, True
 
 
-def Clobber():
+def Clobber(force=None):
   """
   Clobbers the builder before we do the build, if appropriate.
 
   - mode: either 'debug' or 'release'
   """
-  if os.environ.get(BUILDER_CLOBBER) != "1":
+  if os.environ.get(BUILDER_CLOBBER) != "1" and not force:
     return
+  clobber_string = 'Clobber'
+  if force:
+    clobber_string = 'Clobber(always)'
 
-  with BuildStep('Clobber'):
+  with BuildStep(clobber_string):
     cmd = [sys.executable,
            './tools/clean_output_directory.py']
     print 'Clobbering %s' % (' '.join(cmd))
     RunProcess(cmd)
 
 
 def RunTest(name, build_info, targets, flags=None):
   """
   Runs test.py with the given settings.
   """
@@ skipping 39 matching lines @@
   if exit_code != 0:
     raise OSError(exit_code)
 
 
 def GetStepName(name, flags):
   """
   Filters out flags with '=' as this breaks the /stats feature of the buildbot.
   """
   flags = [x for x in flags if not '=' in x]
   return ('%s tests %s' % (name, ' '.join(flags))).strip()