Fix parsing of unrelated options in tox.ini

doc/whatsnew/2/2.14/full.rst

@@ -5,6 +5,10 @@ What's New in Pylint 2.14.1?
 ----------------------------
 Release date: TBA
 
+* Fixed parsing of unrelated options in ``tox.ini``.
+
+  Closes #6800
+
 * Don't crash if we can't find the user's home directory.
 
   Closes #6802

pylint/config/config_file_parser.py

@@ -31,8 +31,7 @@ def __init__(self, verbose: bool, linter: PyLinter) -> None:
         self.verbose_mode = verbose
         self.linter = linter
 
-    @staticmethod
-    def _parse_ini_file(file_path: Path) -> tuple[dict[str, str], list[str]]:
+    def _parse_ini_file(self, file_path: Path) -> tuple[dict[str, str], list[str]]:
         """Parse and handle errors of a ini configuration file."""
         parser = configparser.ConfigParser(inline_comment_prefixes=("#", ";"))
 
@@ -43,7 +42,9 @@ def _parse_ini_file(file_path: Path) -> tuple[dict[str, str], list[str]]:
         config_content: dict[str, str] = {}
         options: list[str] = []
         for section in parser.sections():
-            if "setup.cfg" in str(file_path) and not section.startswith("pylint"):
+            if self._ini_file_with_sections(str(file_path)) and not section.startswith(
+                "pylint"
+            ):
                 if section.lower() == "master":
                     # TODO: 3.0: Remove deprecated handling of master, only allow 'pylint.' sections
                     warnings.warn(
@@ -60,6 +61,15 @@ def _parse_ini_file(file_path: Path) -> tuple[dict[str, str], list[str]]:
                 options += [f"--{opt}", value]
         return config_content, options
 
+    @staticmethod
+    def _ini_file_with_sections(file_path: str) -> bool:
+        """Return whether the file uses sections."""
+        if "setup.cfg" in file_path:
+            return True
+        if "tox.ini" in file_path:
+            return True
+        return False
+
     def _parse_toml_file(self, file_path: Path) -> tuple[dict[str, str], list[str]]:
         """Parse and handle errors of a toml configuration file."""
         try:

tests/config/functional/tox/unrecognized_options/tox.ini

@@ -0,0 +1,16 @@
+; Test for https://github.com/PyCQA/pylint/issues/6800
+
+[tox]
+skipsdist = True
+envlist = py3, pylint
+
+[testenv]
+setenv = PYTHONWARNINGS=ignore
+
+[testenv:pylint]
+deps =
+    pylint
+
+
+[pylint]
+jobs = 10

tests/config/functional/tox/unrecognized_options/tox.result.json

@@ -0,0 +1,3 @@
+{
+  "jobs": 10
+}