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

tools/bots/src-tarball.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 src tarball generation and debian package generation
 
 Package up the src of the dart repo and create a debian package.
 Archive tarball and debian package to google cloud storage.
 """
 
+import os
 import re
 import sys
 
 import bot
+import bot_utils
 
+utils = bot_utils.GetUtils()
+
+HOST_OS = utils.GuessOS()
 SRC_BUILDER = r'src-tarball-linux'
 
 def SrcConfig(name, is_buildbot):
   """Returns info for the current buildbot based on the name of the builder.
 
   Currently, since we only run this on linux, this is just:
   - mode: always "release"
   - system: always "linux"
   """
   src_pattern = re.match(SRC_BUILDER, name)
   if not src_pattern:
     return None
 
   return bot.BuildInfo('none', 'none', 'release', 'linux')
 
 def SrcSteps(build_info):
+  # We always clobber the bot, to not leave old tarballs and packages
+  # floating around the out dir.
+  bot.Clobber(force=True)
   with bot.BuildStep('Create src tarball'):
-    args = [sys.executable, './tools/create_tarball.py']
+    version = utils.GetVersion()
+    builddir = os.path.join(bot_utils.DART_DIR,
+                            utils.GetBuildDir(HOST_OS, HOST_OS),
+                            'src_and_installation')
+    if not os.path.exists(builddir):
+      os.makedirs(builddir)
+    tarfilename = 'dart-%s.tar.gz' % version
+    tarfile = os.path.join(builddir, tarfilename)
+    args = [sys.executable, './tools/create_tarball.py', '--tar_filename',
+            tarfile]
     print 'Building src tarball'
     bot.RunProcess(args)
     print 'Building Debian packages'
-    args = [sys.executable, './tools/create_debian_packages.py']
+    args = [sys.executable, './tools/create_debian_packages.py',
+            '--tar_filename', tarfile,
+            '--out_dir', builddir]
     bot.RunProcess(args)
 
 if __name__ == '__main__':
   # We pass in None for build_step to avoid building the sdk.
   bot.RunBot(SrcConfig, SrcSteps, build_step=None)