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# Copyright 2019 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Helpers/wrappers for the subprocess module for migration to python3."""
import subprocess
def CheckCommand(cmd):
"""Executes the command using Popen()."""
with subprocess.Popen(
cmd, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, encoding="utf-8"
) as cmd_obj:
stdout, _ = cmd_obj.communicate()
if cmd_obj.returncode:
print(stdout)
raise subprocess.CalledProcessError(cmd_obj.returncode, cmd)
def check_output(cmd, cwd=None):
"""Wrapper for pre-python3 subprocess.check_output()."""
return subprocess.check_output(cmd, encoding="utf-8", cwd=cwd)
def check_call(cmd, cwd=None):
"""Wrapper for pre-python3 subprocess.check_call()."""
subprocess.check_call(cmd, encoding="utf-8", cwd=cwd)
# FIXME: CTRL+C does not work when executing a command inside the chroot via
# `cros_sdk`.
def ChrootRunCommand(chroot_path, cmd, verbose=False):
"""Runs the command inside the chroot."""
exec_chroot_cmd = ["cros_sdk", "--"]
exec_chroot_cmd.extend(cmd)
return ExecCommandAndCaptureOutput(
exec_chroot_cmd, cwd=chroot_path, verbose=verbose
)
def ExecCommandAndCaptureOutput(cmd, cwd=None, verbose=False):
"""Executes the command and prints to stdout if possible."""
out = check_output(cmd, cwd=cwd).rstrip()
if verbose and out:
print(out)
return out
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