refactor: no need for _BaseCoverageException

Author: nedbat

coverage/cmdline.py

@@ -24,7 +24,7 @@
 from coverage.core import CTRACER_FILE
 from coverage.data import combinable_files, debug_data_file
 from coverage.debug import info_header, short_stack, write_formatted_info
-from coverage.exceptions import NoSource, _BaseCoverageException, _ExceptionDuringRun
+from coverage.exceptions import NoSource, CoverageException, _ExceptionDuringRun
 from coverage.execfile import PyRunner
 from coverage.results import display_covered, should_fail_under
 from coverage.version import __url__
@@ -1139,7 +1139,7 @@ def main(argv: list[str] | None = None) -> int | None:
         # exception.
         traceback.print_exception(*err.args)  # pylint: disable=no-value-for-parameter
         status = ERR
-    except _BaseCoverageException as err:
+    except CoverageException as err:
         # A controlled error inside coverage.py: print the message to the user.
         msg = err.args[0]
         if err.slug:

coverage/exceptions.py

@@ -8,21 +8,15 @@
 from typing import Any
 
 
-class _BaseCoverageException(Exception):
-    """The base-base of all Coverage exceptions."""
+class CoverageException(Exception):
+    """The base class of all exceptions raised by Coverage.py."""
 
     def __init__(self, *args: Any, slug: str | None = None) -> None:
         super().__init__(*args)
         self.slug = slug
 
 
-class CoverageException(_BaseCoverageException):
-    """The base class of all exceptions raised by Coverage.py."""
-
-    pass
-
-
-class ConfigError(_BaseCoverageException):
+class ConfigError(CoverageException):
     """A problem with a config file, or a value in one."""
 
     pass