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# coding=utf-8
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENCE.TXT
#
import logging
import os
import subprocess
from contextlib import contextmanager
from typing import Iterable # NOQA
import psutil
from .constants import CRASH_LOG_PATH
from .exceptions import PackageMissingError
@contextmanager
def atomic_write(filepath, fsync=True):
""" Writeable file object that atomically updates a file (using a temporary file).
:param filepath: the file path to be opened
:param fsync: whether to force write the file to disk
"""
tmppath = filepath + '.tmp'
try:
with open(tmppath, 'w', encoding='utf-8') as f:
yield f
if fsync:
f.flush()
os.fsync(f.fileno())
os.rename(tmppath, filepath)
finally:
try:
os.remove(tmppath)
except (IOError, OSError):
pass
def is_background_process_running():
"""
Detects if the process installing modules is running in the background.
"""
def _is_wizard_cmdline(cmdline):
# type: (Iterable[str]) -> bool
return (
{'/usr/sbin/cloudlinux-wizard', 'install', '--no-async'} <= set(cmdline)
or {'/sbin/cloudlinux-wizard', 'install', '--no-async'} <= set(cmdline)
)
for proc in psutil.process_iter():
# cmdline example:
# ['/opt/cloudlinux/venv/bin/python3',
# 'usr/sbin/cloudlinux-wizard',
# '--json', 'install', '--json-data', '{json obj}']
try:
cmdline = list(proc.cmdline())
except psutil.NoSuchProcess:
continue
if _is_wizard_cmdline(cmdline):
return True
return False
def run_background(cmd):
log_crash = open(CRASH_LOG_PATH, 'w', encoding='utf-8') # pylint: disable=consider-using-with
return subprocess.Popen(
cmd,
stdin=subprocess.DEVNULL,
stdout=log_crash,
stderr=log_crash
)
def installed_interpreters_list(interpreter):
try:
from clselect.clselectctl import interpreter_versions_short_summary # pylint: disable=import-outside-toplevel
except ImportError as e:
raise PackageMissingError('lvemanager') from e
return interpreter_versions_short_summary(interpreter)
def convert_package_version(version, version_size):
"""
Format version string
e.g:
3.6.0 -> 3.6 if version size = 2
9.11.3 -> 9 if version size = 1
:param version given version to convert
:param version_size expected size of result version string
"""
return '.'.join(version.split('.')[:version_size])
def setup_logger(logger_name, log_file):
"""
Logger setup for all modules
:return:
"""
app_logger = logging.getLogger(logger_name)
app_logger.setLevel(logging.INFO)
try:
fh = logging.FileHandler(log_file)
except IOError:
pass
else:
fh.formatter = logging.Formatter(
'[%(levelname)s | %(asctime)s]: %(message)s')
app_logger.addHandler(fh)
return app_logger