Fixed bug in how PythonTA reports error messages when parsing config files

CHANGELOG.md

@@ -27,6 +27,7 @@ and adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 ### Bug Fixes
 
 - Fixed bug where running `python3 -m python_ta --generate-config` yields a `FileNotFoundError`.
+- Fixed bug in how PythonTA reports error messages that occur when parsing configuration files.
 
 ### New checkers
 

python_ta/__init__.py

@@ -221,6 +221,8 @@ def _override_config(linter: PyLinter, config_location: AnyStr) -> None:
 
     Snippets taken from pylint.config.config_initialization.
     """
+    linter.set_current_module(config_location)
+
     # Read the configuration file.
     config_file_parser = _ConfigurationFileParser(verbose=True, linter=linter)
     try:
@@ -235,6 +237,9 @@ def _override_config(linter: PyLinter, config_location: AnyStr) -> None:
     except _UnrecognizedOptionError as exc:
         print(f"Unrecognized options: {', '.join(exc.options)}", file=sys.stderr)
 
+    # Everything has been set up already so emit any stashed messages.
+    linter._emit_stashed_messages()
+
     linter.config_file = config_location
 
 

python_ta/reporters/core.py

@@ -3,6 +3,7 @@
 import os.path
 import sys
 from collections import defaultdict
+from pathlib import Path
 from typing import Dict, List, Optional, Tuple
 
 from astroid import NodeNG
@@ -215,6 +216,20 @@ def _colourify(cls, colour_class: str, text: str) -> str:
     # Event callbacks
     def on_set_current_module(self, module: str, filepath: Optional[str]) -> None:
         """Hook called when a module starts to be analysed."""
+        # First, check if `module` is the name of a config file and if so, make filepath the
+        # corresponding path to that config file.
+        possible_config_path = Path(os.path.expandvars(module)).expanduser()
+        config_extensions = [".toml", ".ini", ".pylintrc"]
+
+        if possible_config_path.exists():
+            module_basename = os.path.basename(module)
+            if (
+                any(possible_config_path.suffix == extension for extension in config_extensions)
+                or module_basename == ".pylintrc"
+                or module_basename == "pylintrc"
+            ):
+                filepath = possible_config_path
+
         # Skip if filepath is None
         if filepath is None:
             return

tests/test_config/file_fixtures/test_with_errors.pylintrc

@@ -0,0 +1,16 @@
+[REPORTS]
+
+output-format = python_ta.reporters.HTMLReporter
+
+[FORMAT]
+
+max-line-length = 100
+
+ignore-long-lines = ^\s*((# )?<?https?://\S+>?)|(>>>.*)$
+
+[FORBIDDEN IMPORT]
+extra-imports = math, tkinter
+
+[MESSAGES CONTROL]
+disable =
+    ooga

tests/test_config/test_config.py

@@ -121,3 +121,33 @@ def test_default_pylint_checks_in_no_default(configure_linter_no_default) -> Non
     assert all(
         check not in disabled_checks for check in previously_disabled_checks if disabled_checks
     )
+
+
+def test_unknown_option_value() -> None:
+    """Test that the configuration options gets overridden without error when there is an unknown
+    option value."""
+    curr_dir = os.path.dirname(__file__)
+    config = os.path.join(curr_dir, "file_fixtures", "test_with_errors.pylintrc")
+    reporter = python_ta.reset_linter(config=config).reporter
+
+    # Check if there are any messages with the msg_id `W0012` (the code corresponding to the error
+    # `unknown-option-value`.
+    message_ids = [msg.msg_id for message_lis in reporter.messages.values() for msg in message_lis]
+
+    assert "W0012" in message_ids
+
+
+def test_unknown_option_value_no_default() -> None:
+    """Test that the configuration options gets loaded without error when there is an unknown option
+    value.
+
+    The default options are not loaded from the PythonTA default config."""
+    curr_dir = os.path.dirname(__file__)
+    config = os.path.join(curr_dir, "file_fixtures", "test_with_errors.pylintrc")
+    reporter = python_ta.reset_linter(config=config, load_default_config=False).reporter
+
+    # Check if there are any messages with the msg_id `W0012` (the code corresponding to the error
+    # `unknown-option-value`.
+    message_ids = [msg.msg_id for message_lis in reporter.messages.values() for msg in message_lis]
+
+    assert "W0012" in message_ids