refactor: remove AlwaysStdErrHandler and setuptools_scm._log module

Remove obsolete logging code now that logging.lastResort handles the
default stderr handler case.

Changes:
- Remove AlwaysStdErrHandler class from vcs_versioning._log
  * Use logging.lastResort directly in make_default_handler()
  * Remove unused sys and IO imports

- Delete src/setuptools_scm/_log.py module
  * Was only re-exporting from vcs_versioning._log
  * Called configure_logging() on import (no longer needed)

- Update imports to use vcs_versioning._log directly:
  * src/setuptools_scm/_integration/setuptools.py: import configure_logging
  * src/setuptools_scm/_file_finders/__init__.py: use logging.getLogger() directly

All tests pass. The vcs_versioning._log module already configures both
'vcs_versioning' and 'setuptools_scm' loggers, so the setuptools_scm
wrapper module is redundant.

Author: RonnyPfannschmidt

nextgen/vcs-versioning/src/vcs_versioning/_log.py

@@ -7,11 +7,9 @@
 import contextlib
 import logging
 import os
-import sys
 
 from collections.abc import Iterator
 from collections.abc import Mapping
-from typing import IO
 
 # Logger names that need configuration
 LOGGER_NAMES = [
@@ -20,19 +18,6 @@
 ]
 
 
-class AlwaysStdErrHandler(logging.StreamHandler):  # type: ignore[type-arg]
-    def __init__(self) -> None:
-        super().__init__(sys.stderr)
-
-    @property
-    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

src/setuptools_scm/_file_finders/__init__.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import logging
 import os
 
 from collections.abc import Callable
@@ -8,10 +9,9 @@
 from vcs_versioning import _types as _t
 from vcs_versioning._entrypoints import entry_points
 
-from .. import _log
 from .pathtools import norm_real
 
-log = _log.log.getChild("file_finder")
+log = logging.getLogger("setuptools_scm.file_finder")
 
 
 def scm_find_files(

src/setuptools_scm/_integration/setuptools.py

@@ -9,9 +9,9 @@
 import setuptools
 
 from vcs_versioning import _types as _t
+from vcs_versioning._log import configure_logging
 from vcs_versioning._toml import InvalidTomlError
 
-from .. import _log
 from .pyproject_reading import PyProjectData
 from .pyproject_reading import read_pyproject
 from .setup_cfg import SetuptoolsBasicData
@@ -79,7 +79,7 @@ def version_keyword(
     this takes priority over the finalize_options based version
     """
     # Configure logging at setuptools entry point
-    _log.configure_logging()
+    configure_logging()
 
     _log_hookstart("version_keyword", dist)
 
@@ -140,7 +140,7 @@ def infer_version(
     as user might have passed custom code version schemes
     """
     # Configure logging at setuptools entry point
-    _log.configure_logging()
+    configure_logging()
 
     _log_hookstart("infer_version", dist)