# Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
# This file is part of the "cmake-common" project.
# For details, see https://github.com/egor-tensin/cmake-common.
# Distributed under the MIT License.
from contextlib import contextmanager
import functools
import logging
import os.path
import subprocess
import sys
import tempfile
import time
def normalize_path(s):
return os.path.abspath(os.path.normpath(s))
def mkdir_parent(path):
os.makedirs(path, exist_ok=True)
@contextmanager
def setup_logging():
logging.basicConfig(
format='%(asctime)s | %(levelname)s | %(message)s',
datefmt='%Y-%m-%d %H:%M:%S',
level=logging.INFO,
# Log to stdout, because that's where subprocess's output goes (so that
# they don't get interleaved).
stream=sys.stdout)
try:
yield
except Exception as e:
logging.exception(e)
raise
@contextmanager
def cd(path):
cwd = os.getcwd()
os.chdir(path)
try:
yield
finally:
os.chdir(cwd)
def run(cmd_line, **kwargs):
logging.info('Running executable: %s', cmd_line)
return subprocess.run(cmd_line, check=True, **kwargs)
@contextmanager
def delete_on_error(path):
try:
yield
except:
logging.info('Removing temporary file: %s', path)
os.remove(path)
raise
@contextmanager
def delete(path):
try:
yield
finally:
logging.info('Removing temporary file: %s', path)
os.remove(path)
@contextmanager
def temp_file(**kwargs):
'''Make NamedTemporaryFile usable on Windows.
It can't be opened a second time on Windows, hence this silliness.
'''
tmp = tempfile.NamedTemporaryFile(delete=False, **kwargs)
with tmp as file, delete_on_error(file.name):
path = file.name
logging.info('Created temporary file: %s', path)
with delete(path):
yield path
def env(name):
if name not in os.environ:
raise RuntimeError(f'undefined environment variable: {name}')
return os.environ[name]
def retry(exc_type, timeout=5, tries=3, backoff=2):
def wrapper(func):
@functools.wraps(func)
def func2(*args, **kwargs):
current_timeout = timeout
current_try = 0
while True:
try:
return func(*args, **kwargs)
except exc_type as e:
logging.exception(e)
current_try += 1
if current_try < tries:
logging.error('Retrying after %d seconds', current_timeout)
time.sleep(current_timeout)
current_timeout *= backoff
continue
raise
return func2
return wrapper
