feat: support codespell:ignore-next-line directive

Author: SAY-5

README.rst

@@ -156,6 +156,22 @@ Words should be separated by a comma.
        def wrod(wrods) # codespell:ignore
            pass
 
+3. ignore the following line (useful when a formatter pushes comments to a new line):
+
+   .. code-block:: python
+
+       # codespell:ignore-next-line wrod
+       def wrod():
+           pass
+
+   Use the bare form to ignore every misspelling on the next line:
+
+   .. code-block:: python
+
+       # codespell:ignore-next-line
+       def wrod(wrods):
+           pass
+
 Using a config file
 -------------------
 

codespell_lib/_codespell.py

@@ -56,8 +56,12 @@
     r"(\b(?:https?|[ts]?ftp|file|git|smb)://[^\s]+(?=$|\s)|\b[\w.%+-]+@[\w.-]+\b)"
 )
 codespell_ignore_tag = "codespell:ignore"
+codespell_ignore_next_line_tag = "codespell:ignore-next-line"
 inline_ignore_regex = re.compile(
-    rf"[^\w\s]\s*{codespell_ignore_tag}\b(\s+(?P<words>[\w,]*))?"
+    rf"[^\w\s]\s*{codespell_ignore_tag}(?!-)\b(\s+(?P<words>[\w,]*))?"
+)
+ignore_next_line_regex = re.compile(
+    rf"[^\w\s]\s*{codespell_ignore_next_line_tag}\b(\s+(?P<words>[\w,]*))?"
 )
 USAGE = """
 \t%prog [OPTIONS] [file1 file2 ... fileN]
@@ -967,13 +971,28 @@ def parse_lines(
 
     _, fragment_line_number, lines = fragment
 
+    next_line_ignore_words: Optional[set[str]] = None
+
     for i, line in enumerate(lines):
         line = line.rstrip()
+        # Apply any ignore-next-line directive carried from the previous line.
+        pending_next_line_ignore = next_line_ignore_words
+        next_line_ignore_words = None
+
+        directive_words: set[str] = set()
+        if codespell_ignore_next_line_tag in line:
+            nl_match = ignore_next_line_regex.search(line)
+            if nl_match:
+                directive_words = set(
+                    filter(None, (nl_match.group("words") or "").split(","))
+                )
+                next_line_ignore_words = directive_words
+
         if not line or line in exclude_lines:
             continue
         line_number = fragment_line_number + i
 
-        extra_words_to_ignore = set()
+        extra_words_to_ignore: set[str] = set()
         match = (
             inline_ignore_regex.search(line) if codespell_ignore_tag in line else None
         )
@@ -984,6 +1003,14 @@ def parse_lines(
             if not extra_words_to_ignore:
                 continue
 
+        # Words named in an ignore-next-line directive are ignored on its own line too.
+        extra_words_to_ignore |= directive_words
+
+        if pending_next_line_ignore is not None:
+            if not pending_next_line_ignore:
+                continue
+            extra_words_to_ignore |= pending_next_line_ignore
+
         fixed_words = set()
         asked_for = set()
 

codespell_lib/tests/test_basic.py

@@ -493,6 +493,50 @@ def test_inline_ignores(
     assert cs.main(d) == expected_error_count
 
 
+@pytest.mark.parametrize(
+    ("content", "expected_error_count"),
+    [
+        # wildcard form: ignore all misspellings on the next line
+        ("# codespell:ignore-next-line\nabandonned abondon abilty\n", 0),
+        ("// codespell:ignore-next-line\nabandonned abondon abilty\n", 0),
+        # specific word form: ignore only listed words on the next line
+        (
+            "# codespell:ignore-next-line abondon\nabandonned abondon abilty\n",
+            2,
+        ),
+        (
+            "# codespell:ignore-next-line abondon,abilty\nabandonned abondon abilty\n",
+            1,
+        ),
+        # the directive does not affect the line it is on or subsequent lines
+        (
+            "abandonned  # codespell:ignore-next-line\nabondon\nabilty\n",
+            2,
+        ),
+        # listing an unused ignore word still triggers a skip
+        (
+            "# codespell:ignore-next-line nomenklatur\nabandonned abondon abilty\n",
+            3,
+        ),
+        # invalid directives are not honored
+        ("# codespell:ignore-next-lin\nabandonned\n", 1),
+        ("codespell:ignore-next-line\nabandonned\n", 1),
+        # directive followed by a blank line still consumes the directive
+        ("# codespell:ignore-next-line\n\nabandonned\n", 1),
+    ],
+)
+def test_ignore_next_line(
+    tmpdir: pytest.TempPathFactory,
+    capsys: pytest.CaptureFixture[str],
+    content: str,
+    expected_error_count: int,
+) -> None:
+    d = str(tmpdir)
+    with open(op.join(d, "bad.txt"), "w", encoding="utf-8") as f:
+        f.write(content)
+    assert cs.main(d) == expected_error_count
+
+
 def test_custom_regex(
     tmp_path: Path,
     capsys: pytest.CaptureFixture[str],