[android] Add timeout_retry module to pylib/utils/.

build/android/pylib/cmd_helper.py

 # Copyright (c) 2012 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.
 
 """A wrapper for subprocess to make calling shell commands easier."""
 
-import os
 import logging
 import pipes
 import signal
 import subprocess
 import tempfile
 
-import constants
+from utils import timeout_retry
 
 
 def Popen(args, stdout=None, stderr=None, shell=None, cwd=None, env=None):
   return subprocess.Popen(
       args=args, cwd=cwd, stdout=stdout, stderr=stderr,
       shell=shell, close_fds=True, env=env,
       preexec_fn=lambda: signal.signal(signal.SIGPIPE, signal.SIG_DFL))
 
 
 def Call(args, stdout=None, stderr=None, shell=None, cwd=None, env=None):
@@ skipping 41 matching lines @@
   """Executes a subprocess and returns its exit code and output.
 
   Args:
     args: A string or a sequence of program arguments. The program to execute is
       the string or the first item in the args sequence.
     cwd: If not None, the subprocess's current directory will be changed to
       |cwd| before it's executed.
     shell: Whether to execute args as a shell command.
 
   Returns:
-    The tuple (exit code, output).
+    The 2-tuple (exit code, output).
   """
   if isinstance(args, basestring):
     args_repr = args
     if not shell:
       raise Exception('string args must be run with shell=True')
   elif shell:
     raise Exception('array args must be run with shell=False')
   else:
     args_repr = ' '.join(map(pipes.quote, args))
 
@@ skipping 10 matching lines @@
   tmperr.close()
   if stderr:
     logging.critical(stderr)
   tmpout.seek(0)
   stdout = tmpout.read()
   tmpout.close()
   if len(stdout) > 4096:
     logging.debug('Truncated output:')
   logging.debug(stdout[:4096])
   return (exit_code, stdout)
+
+
+def GetCmdStatusAndOutputWithTimeoutAndRetries(args, timeout, retries):
+  """Executes a subprocess with a timeout and retries.
+
+  Args:
+    args: List of arguments to the program, the program to execute is the first
+      element.
+    timeout: the timeout in seconds.
+    retries: the number of retries.
+
+  Returns:
+    The 2-tuple (exit code, output).
+  """
+  return timeout_retry.Run(GetCmdStatusAndOutput, timeout, retries, [args])