Change how errors-mode is parsed

Author: DanielNoord

pylint/config/callback_actions.py

@@ -257,7 +257,7 @@ def __call__(
         values: Union[str, Sequence[Any], None],
         option_string: Optional[str] = "--errors-only",
     ) -> None:
-        self.run.linter.error_mode()
+        self.run.linter._error_mode = True
 
 
 class _LongHelpAction(_AccessRunObjectAction):

pylint/config/config_initialization.py

@@ -103,4 +103,6 @@ def _config_initialization(
         linter._arg_parser.print_help()
         sys.exit(32)
 
+    linter._parse_error_mode()
+
     return parsed_args_list

pylint/lint/pylinter.py

@@ -831,9 +831,14 @@ def disable_reporters(self):
             for report_id, _, _ in _reporters:
                 self.disable_report(report_id)
 
-    def error_mode(self):
-        """Error mode: enable only errors; no reports, no persistent."""
-        self._error_mode = True
+    def _parse_error_mode(self) -> None:
+        """Parse the current state of the error mode.
+
+        Error mode: enable only errors; no reports, no persistent.
+        """
+        if not self._error_mode:
+            return
+
         self.disable_noerror_messages()
         self.disable("miscellaneous")
         self.set_option("reports", False)

tests/lint/unittest_lint.py

@@ -392,7 +392,8 @@ def test_enable_checkers(linter: PyLinter) -> None:
 
 def test_errors_only(initialized_linter: PyLinter) -> None:
     linter = initialized_linter
-    linter.error_mode()
+    linter._error_mode = True
+    linter._parse_error_mode()
     checkers = linter.prepare_checkers()
     checker_names = {c.name for c in checkers}
     should_not = {"design", "format", "metrics", "miscellaneous", "similarities"}