111 lines
3.3 KiB
Python
111 lines
3.3 KiB
Python
|
# 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
|
||
|
|
|
||
|
|
|
||
|
|
def _Call(args, stdout=None, stderr=None, shell=None, cwd=None):
|
||
|
|
return subprocess.call(
|
||
|
|
args=args, cwd=cwd, stdout=stdout, stderr=stderr,
|
||
|
|
shell=shell, close_fds=True,
|
||
|
|
preexec_fn=lambda: signal.signal(signal.SIGPIPE, signal.SIG_DFL))
|
||
|
|
|
||
|
|
|
||
|
|
def RunCmd(args, cwd=None):
|
||
|
|
"""Opens a subprocess to execute a program and returns its return value.
|
||
|
|
|
||
|
|
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.
|
||
|
|
|
||
|
|
Returns:
|
||
|
|
Return code from the command execution.
|
||
|
|
"""
|
||
|
|
logging.info(str(args) + ' ' + (cwd or ''))
|
||
|
|
return _Call(args, cwd=cwd)
|
||
|
|
|
||
|
|
|
||
|
|
def GetCmdOutput(args, cwd=None, shell=False):
|
||
|
|
"""Open a subprocess to execute a program and returns its 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:
|
||
|
|
Captures and returns the command's stdout.
|
||
|
|
Prints the command's stderr to logger (which defaults to stdout).
|
||
|
|
"""
|
||
|
|
(_, output) = GetCmdStatusAndOutput(args, cwd, shell)
|
||
|
|
return output
|
||
|
|
|
||
|
|
|
||
|
|
def GetCmdStatusAndOutput(args, cwd=None, shell=False):
|
||
|
|
"""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).
|
||
|
|
"""
|
||
|
|
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))
|
||
|
|
|
||
|
|
s = '[host]'
|
||
|
|
if cwd:
|
||
|
|
s += ':' + cwd
|
||
|
|
s += '> ' + args_repr
|
||
|
|
logging.info(s)
|
||
|
|
tmpout = tempfile.TemporaryFile(bufsize=0)
|
||
|
|
tmperr = tempfile.TemporaryFile(bufsize=0)
|
||
|
|
exit_code = _Call(args, cwd=cwd, stdout=tmpout, stderr=tmperr, shell=shell)
|
||
|
|
tmperr.seek(0)
|
||
|
|
stderr = tmperr.read()
|
||
|
|
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)
|
||
|
|
|
||
|
|
|
||
|
|
class OutDirectory(object):
|
||
|
|
_out_directory = os.path.join(constants.DIR_SOURCE_ROOT,
|
||
|
|
os.environ.get('CHROMIUM_OUT_DIR','out'))
|
||
|
|
@staticmethod
|
||
|
|
def set(out_directory):
|
||
|
|
OutDirectory._out_directory = out_directory
|
||
|
|
@staticmethod
|
||
|
|
def get():
|
||
|
|
return OutDirectory._out_directory
|