openpilot v0.9.6 release

date: 2024-02-21T23:02:42
master commit: 0b4d08fab8e35a264bc7383e878538f8083c33e5

common/prefix.py

@@ -0,0 +1,52 @@
+import os
+import shutil
+import uuid
+
+from typing import Optional
+
+from openpilot.common.params import Params
+from openpilot.system.hardware.hw import Paths
+from openpilot.system.hardware.hw import DEFAULT_DOWNLOAD_CACHE_ROOT
+
+class OpenpilotPrefix:
+  def __init__(self, prefix: Optional[str] = None, clean_dirs_on_exit: bool = True, shared_download_cache: bool = False):
+    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
+    self.shared_download_cache = shared_download_cache
+
+  def __enter__(self):
+    self.original_prefix = os.environ.get('OPENPILOT_PREFIX', None)
+    os.environ['OPENPILOT_PREFIX'] = self.prefix
+    try:
+      os.mkdir(self.msgq_path)
+    except FileExistsError:
+      pass
+    os.makedirs(Paths.log_root(), exist_ok=True)
+
+    if self.shared_download_cache:
+      os.environ["COMMA_CACHE"] = DEFAULT_DOWNLOAD_CACHE_ROOT
+
+    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']
+      if self.original_prefix is not None:
+        os.environ['OPENPILOT_PREFIX'] = self.original_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)
+    if not os.environ.get("COMMA_CACHE", False):
+      shutil.rmtree(Paths.download_cache_root(), ignore_errors=True)
+    shutil.rmtree(Paths.comma_home(), ignore_errors=True)