Passes cache location to tests and runs the tests in parallel.

lib/cros_build_lib.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """Common python commands used by various build scripts."""
 
 import inspect
 import os
+import re
 import subprocess
 import sys
 
 _STDOUT_IS_TTY = hasattr(sys.stdout, 'isatty') and sys.stdout.isatty()
 
 # TODO(sosa):  Move logging to logging module.
 
 class RunCommandException(Exception):
   """Raised when there is an error in RunCommand."""
   pass
@@ skipping 213 matching lines @@
   root_abs_path = os.path.abspath(root_path)
 
   # Strip the repository root from the path and strip first /.
   relative_path = path_abs_path.replace(root_abs_path, '')[1:]
 
   if relative_path == path_abs_path:
     raise Exception('Error: path is outside your src tree, cannot reinterpret.')
 
   new_path = os.path.join('/home', os.getenv('USER'), 'trunk', relative_path)
   return new_path
+
+
+def GetIPAddress(device='eth0'):
+  """Returns the IP Address for a given device using ifconfig.
+
+  socket.gethostname() is insufficient for machines where the host files are
+  not set up "correctly."  Since some of our builders may have this issue,
+  this method gives you a generic way to get the address so you are reachable
+  either via a VM or remote machine on the same network.
+  """
+  ifconfig_output = RunCommand(['ifconfig', device], redirect_stdout=True,
+                               print_cmd=False)
+  match = re.search('.*inet addr:(\d+\.\d+\.\d+\.\d+).*', ifconfig_output)
+  if match:
+    return match.group(1)
+  else:
+    Warning('Failed to find ip address in %s' % ifconfig_output)
+    return None