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"""
logging helpers, supports vendoring
"""
from __future__ import annotations
import contextlib
import logging
import os
import sys
from typing import IO
from typing import Iterator
from typing import Mapping
log = logging.getLogger(__name__.rsplit(".", 1)[0])
log.propagate = False
class AlwaysStdErrHandler(logging.StreamHandler): # type: ignore[type-arg]
def __init___(self) -> None:
super().__init__(sys.stderr)
@property # type: ignore [override]
def stream(self) -> IO[str]:
return sys.stderr
@stream.setter
def stream(self, value: IO[str]) -> None:
assert value is sys.stderr
def make_default_handler() -> logging.Handler:
try:
from rich.console import Console
console = Console(stderr=True)
from rich.logging import RichHandler
return RichHandler(console=console)
except ImportError:
handler = AlwaysStdErrHandler()
handler.setFormatter(logging.Formatter("%(levelname)s %(name)s %(message)s"))
return handler
_default_handler = make_default_handler()
log.addHandler(_default_handler)
def _default_log_level(_env: Mapping[str, str] = os.environ) -> int:
val: str | None = _env.get("SETUPTOOLS_SCM_DEBUG")
return logging.WARN if val is None else logging.DEBUG
log.setLevel(_default_log_level())
@contextlib.contextmanager
def defer_to_pytest() -> Iterator[None]:
log.propagate = True
old_level = log.level
log.setLevel(logging.NOTSET)
log.removeHandler(_default_handler)
try:
yield
finally:
log.addHandler(_default_handler)
log.propagate = False
log.setLevel(old_level)
@contextlib.contextmanager
def enable_debug(handler: logging.Handler = _default_handler) -> Iterator[None]:
log.addHandler(handler)
old_level = log.level
log.setLevel(logging.DEBUG)
old_handler_level = handler.level
handler.setLevel(logging.DEBUG)
try:
yield
finally:
log.setLevel(old_level)
handler.setLevel(old_handler_level)
if handler is not _default_handler:
log.removeHandler(handler)
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