119 lines
3.5 KiB
Python
119 lines
3.5 KiB
Python
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import io
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import os
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import tempfile
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import contextlib
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import subprocess
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import time
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import functools
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from subprocess import Popen, PIPE, TimeoutExpired
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import zstandard as zstd
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from openpilot.common.swaglog import cloudlog
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LOG_COMPRESSION_LEVEL = 10 # little benefit up to level 15. level ~17 is a small step change
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class CallbackReader:
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"""Wraps a file, but overrides the read method to also
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call a callback function with the number of bytes read so far."""
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def __init__(self, f, callback, *args):
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self.f = f
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self.callback = callback
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self.cb_args = args
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self.total_read = 0
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def __getattr__(self, attr):
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return getattr(self.f, attr)
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def read(self, *args, **kwargs):
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chunk = self.f.read(*args, **kwargs)
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self.total_read += len(chunk)
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self.callback(*self.cb_args, self.total_read)
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return chunk
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@contextlib.contextmanager
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def atomic_write_in_dir(path: str, mode: str = 'w', buffering: int = -1, encoding: str | None = None, newline: str | None = None,
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overwrite: bool = False):
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"""Write to a file atomically using a temporary file in the same directory as the destination file."""
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dir_name = os.path.dirname(path)
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if not overwrite and os.path.exists(path):
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raise FileExistsError(f"File '{path}' already exists. To overwrite it, set 'overwrite' to True.")
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with tempfile.NamedTemporaryFile(mode=mode, buffering=buffering, encoding=encoding, newline=newline, dir=dir_name, delete=False) as tmp_file:
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yield tmp_file
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tmp_file_name = tmp_file.name
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os.replace(tmp_file_name, path)
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def get_upload_stream(filepath: str, should_compress: bool) -> tuple[io.BufferedIOBase, int]:
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if not should_compress:
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file_size = os.path.getsize(filepath)
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file_stream = open(filepath, "rb")
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return file_stream, file_size
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# Compress the file on the fly
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compressed_stream = io.BytesIO()
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compressor = zstd.ZstdCompressor(level=LOG_COMPRESSION_LEVEL)
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with open(filepath, "rb") as f:
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compressor.copy_stream(f, compressed_stream)
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compressed_size = compressed_stream.tell()
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compressed_stream.seek(0)
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return compressed_stream, compressed_size
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# remove all keys that end in DEPRECATED
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def strip_deprecated_keys(d):
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for k in list(d.keys()):
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if isinstance(k, str):
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if k.endswith('DEPRECATED'):
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d.pop(k)
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elif isinstance(d[k], dict):
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strip_deprecated_keys(d[k])
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return d
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def run_cmd(cmd: list[str], cwd=None, env=None) -> str:
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return subprocess.check_output(cmd, encoding='utf8', cwd=cwd, env=env).strip()
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def run_cmd_default(cmd: list[str], default: str = "", cwd=None, env=None) -> str:
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try:
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return run_cmd(cmd, cwd=cwd, env=env)
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except subprocess.CalledProcessError:
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return default
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@contextlib.contextmanager
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def managed_proc(cmd: list[str], env: dict[str, str]):
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proc = Popen(cmd, env=env, stdout=PIPE, stderr=PIPE)
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try:
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yield proc
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finally:
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if proc.poll() is None:
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proc.terminate()
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try:
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proc.wait(timeout=5)
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except TimeoutExpired:
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proc.kill()
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def retry(attempts=3, delay=1.0, ignore_failure=False):
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def decorator(func):
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@functools.wraps(func)
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def wrapper(*args, **kwargs):
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for _ in range(attempts):
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try:
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return func(*args, **kwargs)
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except Exception:
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cloudlog.exception(f"{func.__name__} failed, trying again")
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time.sleep(delay)
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if ignore_failure:
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cloudlog.error(f"{func.__name__} failed after retry")
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else:
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raise Exception(f"{func.__name__} failed after retry")
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return wrapper
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return decorator
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