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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this file,
# You can obtain one at http://mozilla.org/MPL/2.0/.
"""Functions for running commands"""
from __future__ import absolute_import, print_function
import subprocess
import os
import time
import logging
import six
log = logging.getLogger(__name__)
# timeout message, used in TRANSIENT_HG_ERRORS and in tests.
TERMINATED_PROCESS_MSG = "timeout, process terminated"
def log_cmd(cmd, **kwargs):
# cwd is special in that we always want it printed, even if it's not
# explicitly chosen
kwargs = kwargs.copy()
if "cwd" not in kwargs:
kwargs["cwd"] = os.getcwd()
log.info("command: START")
log.info("command: %s" % subprocess.list2cmdline(cmd))
for key, value in six.iteritems(kwargs):
log.info("command: %s: %s", key, str(value))
def merge_env(env):
new_env = os.environ.copy()
new_env.update(env)
return new_env
def run_cmd(cmd, **kwargs):
"""Run cmd (a list of arguments). Raise subprocess.CalledProcessError if
the command exits with non-zero. If the command returns successfully,
return 0."""
log_cmd(cmd, **kwargs)
# We update this after logging because we don't want all of the inherited
# env vars muddling up the output
if "env" in kwargs:
kwargs["env"] = merge_env(kwargs["env"])
try:
t = time.time()
log.info("command: output:")
return subprocess.check_call(cmd, **kwargs)
except subprocess.CalledProcessError:
log.info("command: ERROR", exc_info=True)
raise
finally:
elapsed = time.time() - t
log.info("command: END (%.2fs elapsed)\n", elapsed)
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