openpilot is an open source driver assistance system. openpilot performs the functions of Automated Lane Centering and Adaptive Cruise Control for over 200 supported car makes and models.
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import os
import shutil
import uuid
from typing import Optional
from openpilot.common.params import Params
from openpilot.system.hardware.hw import Paths
class OpenpilotPrefix:
def __init__(self, prefix: Optional[str] = None, clean_dirs_on_exit: bool = True):
self.prefix = prefix if prefix else str(uuid.uuid4().hex[0:15])
self.msgq_path = os.path.join('/dev/shm', self.prefix)
self.clean_dirs_on_exit = clean_dirs_on_exit
def __enter__(self):
os.environ['OPENPILOT_PREFIX'] = self.prefix
try:
os.mkdir(self.msgq_path)
except FileExistsError:
pass
os.makedirs(Paths.log_root(), exist_ok=True)
return self
def __exit__(self, exc_type, exc_obj, exc_tb):
if self.clean_dirs_on_exit:
self.clean_dirs()
try:
del os.environ['OPENPILOT_PREFIX']
except KeyError:
pass
return False
def clean_dirs(self):
symlink_path = Params().get_param_path()
if os.path.exists(symlink_path):
shutil.rmtree(os.path.realpath(symlink_path), ignore_errors=True)
os.remove(symlink_path)
shutil.rmtree(self.msgq_path, ignore_errors=True)
shutil.rmtree(Paths.log_root(), ignore_errors=True)