From cbc77801a71d78632df749a7b70c65881c628660 Mon Sep 17 00:00:00 2001
From: x0Lazarus <113273587+x0Lazarus@users.noreply.github.com>
Date: Fri, 18 Sep 2026 09:40:37 -0700
Subject: [PATCH 1/2] Run the pinned docformatter hook on Python 3.12

---
 .pre-commit-config.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 524976fb..a573aaad 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -34,6 +34,7 @@ repos:
   rev: ab802050e6e96aaaf7f917fcbc333bb74e2e57f7  # frozen: v1.4.2
   hooks:
   - id: docformatter
+    language_version: python3.12
 - repo: https://github.com/PyCQA/flake8
   rev: d93590f5be797aabb60e3b09f2f52dddb02f349f  # frozen: 7.3.0
   hooks:

From 5f6771095df5ee4a796cfe6e9e0c4a8737514dac Mon Sep 17 00:00:00 2001
From: x0Lazarus <113273587+x0Lazarus@users.noreply.github.com>
Date: Fri, 18 Sep 2026 16:13:06 -0700
Subject: [PATCH 2/2] Initialize InvalidPath exception arguments

Reuse the InvalidPath initializer correction proposed by @meek2100 in
https://github.com/hukkin/mdformat/pull/563 (head
9f35047f2f72017e901bec5244419d1757cd03d1). Only the return annotation
and super().__init__(path) call are reused; no --config feature changes.

Add regression coverage for positional and keyword construction,
exception arguments, string rendering and pickle round trips. This
resolves B042 and preserves the exception contract.
---
 src/mdformat/_cli.py |  3 ++-
 tests/test_cli.py    | 19 ++++++++++++++++++-
 2 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/src/mdformat/_cli.py b/src/mdformat/_cli.py
index 682b7896..150668a6 100644
--- a/src/mdformat/_cli.py
+++ b/src/mdformat/_cli.py
@@ -326,7 +326,8 @@ def separate_core_and_plugin_opts(opts: Mapping) -> tuple[dict, dict]:
 class InvalidPath(Exception):
     """Exception raised when a path does not exist."""
 
-    def __init__(self, path: Path):
+    def __init__(self, path: Path) -> None:
+        super().__init__(path)
         self.path = path
 
 
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 28c36223..b4b5efa8 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1,11 +1,12 @@
 import os
+import pickle
 import sys
 from unittest.mock import patch
 
 import pytest
 
 import mdformat
-from mdformat._cli import get_plugin_info_str, run, wrap_paragraphs
+from mdformat._cli import InvalidPath, get_plugin_info_str, run, wrap_paragraphs
 from mdformat.plugins import CODEFORMATTERS, PARSER_EXTENSIONS
 from tests.utils import (
     FORMATTED_MARKDOWN,
@@ -92,6 +93,22 @@ def test_invalid_file(capsys):
     assert "does not exist" in captured.err
 
 
+@pytest.mark.parametrize("use_keyword", [False, True])
+def test_invalid_path_exception(tmp_path, use_keyword):
+    path = tmp_path / "missing.md"
+    error = InvalidPath(path=path) if use_keyword else InvalidPath(path)
+
+    assert error.path == path
+    assert error.args == (path,)
+    assert str(error) == str(path)
+
+    restored = pickle.loads(pickle.dumps(error))
+    assert isinstance(restored, InvalidPath)
+    assert restored.path == path
+    assert restored.args == error.args
+    assert str(restored) == str(error)
+
+
 @pytest.mark.skipif(os.name == "nt", reason="No os.mkfifo on windows")
 def test_fifo(tmp_path, capsys):
     fifo_path = tmp_path / "fifo1"