1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/media/webrtc/trunk/build/android/pylib/cmd_helper.py Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,50 @@
1.4 +# Copyright (c) 2012 The Chromium Authors. All rights reserved.
1.5 +# Use of this source code is governed by a BSD-style license that can be
1.6 +# found in the LICENSE file.
1.7 +
1.8 +"""A wrapper for subprocess to make calling shell commands easier."""
1.9 +
1.10 +
1.11 +import logging
1.12 +import subprocess
1.13 +
1.14 +
1.15 +def RunCmd(args, cwd=None):
1.16 + """Opens a subprocess to execute a program and returns its return value.
1.17 +
1.18 + Args:
1.19 + args: A string or a sequence of program arguments. The program to execute is
1.20 + the string or the first item in the args sequence.
1.21 + cwd: If not None, the subprocess's current directory will be changed to
1.22 + |cwd| before it's executed.
1.23 +
1.24 + Returns:
1.25 + Return code from the command execution.
1.26 + """
1.27 + logging.info(str(args) + ' ' + (cwd or ''))
1.28 + p = subprocess.Popen(args=args, cwd=cwd)
1.29 + return p.wait()
1.30 +
1.31 +
1.32 +def GetCmdOutput(args, cwd=None, shell=False):
1.33 + """Open a subprocess to execute a program and returns its output.
1.34 +
1.35 + Args:
1.36 + args: A string or a sequence of program arguments. The program to execute is
1.37 + the string or the first item in the args sequence.
1.38 + cwd: If not None, the subprocess's current directory will be changed to
1.39 + |cwd| before it's executed.
1.40 + shell: Whether to execute args as a shell command.
1.41 +
1.42 + Returns:
1.43 + Captures and returns the command's stdout.
1.44 + Prints the command's stderr to logger (which defaults to stdout).
1.45 + """
1.46 + logging.info(str(args) + ' ' + (cwd or ''))
1.47 + p = subprocess.Popen(args=args, cwd=cwd, stdout=subprocess.PIPE,
1.48 + stderr=subprocess.PIPE, shell=shell)
1.49 + stdout, stderr = p.communicate()
1.50 + if stderr:
1.51 + logging.critical(stderr)
1.52 + logging.info(stdout[:4096]) # Truncate output longer than 4k.
1.53 + return stdout
