blob: 65b10b466a258459deb4b015f0cd2fb6838ac4a9 [file] [log] [blame]
# Copyright (c) 2011 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.
"""This module contains methods interfacing with pre-existing tools."""
import logging
import subprocess
from cb_constants import BundlingError
class CommandResult(object):
"""An object to store various attributes of a child process.
Borrowed from <chromeos_root>/chromite/lib/
def __init__(self):
self.cmd = None
self.error = None
self.output = None
self.returncode = None
def RunCommand(cmd, redirect_stdout=False, redirect_stderr=False, cwd=None):
"""Runs a command using subprocess module Popen.
Blocks until command returns.
Modeled on RunCommand from <chromeos_root>/chromite/lib/
cmd: a list of arguments to Popen
redirect_stdout: a boolean, True when subprocess output should be returned
redirect_stderr: a boolean, True when subprocess errors should be returned
cwd: working directory in which to run command
a CommandResult object.
BundlingError when running command fails.
# Set default
stdout = None
stderr = None
cmd_result = CommandResult()
cmd_result.cmd = cmd
# Modify defaults based on parameters
if redirect_stdout:
stdout = subprocess.PIPE
if redirect_stderr:
stderr = subprocess.PIPE
# log command run'Running command: ' + ' '.join(cmd))
proc = subprocess.Popen(cmd, cwd=cwd, stdout=stdout, stderr=stderr)
except OSError as (errno, strerror):
raise BundlingError('\n'.join(['OSError [%d] : %s' % (errno, strerror),
'OSError running cmd %s' % ' '.join(cmd)]))
(cmd_result.output, cmd_result.error) = proc.communicate()
cmd_result.returncode = proc.returncode
return cmd_result