restore logging functionality

there was an unintended misconfiguration in the logging setup enforcing always warning levels

3 files changed, 34 insertions, 37 deletions

diff --git a/src/setuptools_scm/__init__.py b/src/setuptools_scm/__init__.py
index faea673..01b3da8 100644
--- a/src/setuptools_scm/__init__.py
+++ b/src/setuptools_scm/__init__.py
@@ -152,26 +152,23 @@ def get_version(
 
 
 def _get_version(config: Configuration) -> str | None:
-    from ._log import magic_debug
-
-    with magic_debug():
-        parsed_version = _do_parse(config)
-        if parsed_version is None:
-            return None
-        version_string = _format_version(
-            parsed_version,
-            version_scheme=config.version_scheme,
-            local_scheme=config.local_scheme,
+    parsed_version = _do_parse(config)
+    if parsed_version is None:
+        return None
+    version_string = _format_version(
+        parsed_version,
+        version_scheme=config.version_scheme,
+        local_scheme=config.local_scheme,
+    )
+    if config.write_to is not None:
+        dump_version(
+            root=config.root,
+            version=version_string,
+            write_to=config.write_to,
+            template=config.write_to_template,
         )
-        if config.write_to is not None:
-            dump_version(
-                root=config.root,
-                version=version_string,
-                write_to=config.write_to,
-                template=config.write_to_template,
-            )
 
-        return version_string
+    return version_string
 
 
 # Public API
diff --git a/src/setuptools_scm/_log.py b/src/setuptools_scm/_log.py
index abbdd0c..1247d46 100644
--- a/src/setuptools_scm/_log.py
+++ b/src/setuptools_scm/_log.py
@@ -9,6 +9,7 @@ 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
@@ -46,19 +47,9 @@ _default_handler = make_default_handler()
 log.addHandler(_default_handler)
 
 
-def _default_log_level() -> str | int:
-    val: str = os.environ.get("SETUPTOOLS_SCM_DEBUG", "")
-    level: str | int
-    if val:
-        level = logging.DEBUG
-        levelname: str | int = logging.getLevelName(val)
-        if isinstance(levelname, int):
-            level = val
-        else:
-            level = logging.WARNING
-    else:
-        level = logging.WARNING
-    return level
+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())
@@ -92,9 +83,3 @@ def enable_debug(handler: logging.Handler = _default_handler) -> Iterator[None]:
         handler.setLevel(old_handler_level)
         if handler is not _default_handler:
             log.removeHandler(handler)
-
-
-@contextlib.contextmanager
-def magic_debug() -> Iterator[None]:
-    with enable_debug():
-        yield
diff --git a/testing/test_internal_log_level.py b/testing/test_internal_log_level.py
new file mode 100644
index 0000000..68ce8e0
--- /dev/null
+++ b/testing/test_internal_log_level.py
@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+import logging
+
+from setuptools_scm import _log
+
+
+def test_log_levels_when_set() -> None:
+    assert _log._default_log_level({"SETUPTOOLS_SCM_DEBUG": ""}) == logging.DEBUG
+    assert _log._default_log_level({"SETUPTOOLS_SCM_DEBUG": "INFO"}) == logging.DEBUG
+    assert _log._default_log_level({"SETUPTOOLS_SCM_DEBUG": "3"}) == logging.DEBUG
+
+
+def test_log_levels_when_unset() -> None:
+    assert _log._default_log_level({}) == logging.WARNING