package.py 文件源码

def TeeCmd(cmd, logfile, fail_hard=True):
  """Runs cmd and writes the output to both stdout and logfile."""
  # Reading from PIPE can deadlock if one buffer is full but we wait on a
  # different one.  To work around this, pipe the subprocess's stderr to
  # its stdout buffer and don't give it a stdin.
  # shell=True is required in cmd.exe since depot_tools has an svn.bat, and
  # bat files only work with shell=True set.
  proc = subprocess.Popen(cmd, bufsize=1, shell=sys.platform == 'win32',
                          stdin=open(os.devnull), stdout=subprocess.PIPE,
                          stderr=subprocess.STDOUT)
  for line in iter(proc.stdout.readline,''):
    Tee(line, logfile)
    if proc.poll() is not None:
      break
  exit_code = proc.wait()
  if exit_code != 0 and fail_hard:
    print 'Failed:', cmd
    sys.exit(1)