Add type hints to untyped definitions

.ruff.toml

@@ -38,7 +38,7 @@ select = [
     "ANN003",  # Missing type annotation for `**{name}`
 #    "ANN101",  # Missing type annotation for `{name}` in method
 #    "ANN102",  # Missing type annotation for `{name}` in classmethod
-#    "ANN201",  # Missing return type annotation for public function `{name}`
+    "ANN201",  # Missing return type annotation for public function `{name}`
 #    "ANN202",  # Missing return type annotation for private function `{name}`
 #    "ANN204",  # Missing return type annotation for special method `{name}`
     "ANN205",  # Missing return type annotation for staticmethod `{name}`
@@ -471,6 +471,9 @@ select = [
 ]
 
 [lint.per-file-ignores]
+"doc/*" = [
+    "ANN",  # documentation doesn't need annotations
+]
 "doc/conf.py" = ["INP001"]
 "doc/development/tutorials/examples/*" = ["INP001"]
 # allow print() in the tutorial
@@ -506,8 +509,10 @@ select = [
 "tests/test_util_typing.py" = ["UP006", "UP035"]
 "tests/typing_test_data.py" = ["FA100", "UP006", "UP035"]
 
-# whitelist ``print`` for stdout messages
-"utils/*" = ["T201"]
+"utils/*" = [
+    "T201",  # whitelist ``print`` for stdout messages
+    "ANN",  # utilities don't need annotations
+]
 
 [lint.flake8-quotes]
 inline-quotes = "single"

sphinx/addnodes.py

@@ -167,7 +167,7 @@ class desc_signature(_desc_classes_injector, nodes.Part, nodes.Inline, nodes.Tex
     classes = ['sig', 'sig-object']
 
     @property
-    def child_text_separator(self):
+    def child_text_separator(self) -> str:  # type: ignore[override]
         if self.get('is_multiline'):
             return ' '
         else:
@@ -258,7 +258,7 @@ class desc_parameterlist(nodes.Part, nodes.Inline, nodes.FixedTextElement):
     """
     child_text_separator = ', '
 
-    def astext(self):
+    def astext(self) -> str:
         return f'({super().astext()})'
 
 
@@ -271,7 +271,7 @@ class desc_type_parameter_list(nodes.Part, nodes.Inline, nodes.FixedTextElement)
     """
     child_text_separator = ', '
 
-    def astext(self):
+    def astext(self) -> str:
         return f'[{super().astext()}]'
 
 
@@ -322,7 +322,7 @@ class desc_sig_element(nodes.inline, _desc_classes_injector):
         super().__init__(rawsource, text, *children, **attributes)
         self['classes'].extend(self.classes)
 
-    def __init_subclass__(cls, *, _sig_element=False, **kwargs: Any):
+    def __init_subclass__(cls, *, _sig_element: bool = False, **kwargs: Any):
         super().__init_subclass__(**kwargs)
         if _sig_element:
             # add the class to the SIG_ELEMENTS set if asked

sphinx/application.py

@@ -13,7 +13,7 @@ from collections import deque
 from collections.abc import Collection, Sequence  # NoQA: TCH003
 from io import StringIO
 from os import path
-from typing import IO, TYPE_CHECKING, Any, Callable
+from typing import IO, TYPE_CHECKING, Any, Callable, Literal
 
 from docutils.nodes import TextElement  # NoQA: TCH002
 from docutils.parsers.rst import Directive, roles
@@ -1307,7 +1307,7 @@ class Sphinx:
 
         return True
 
-    def set_html_assets_policy(self, policy):
+    def set_html_assets_policy(self, policy: Literal['always', 'per_page']) -> None:
         """Set the policy to include assets in HTML pages.
 
         - always: include the assets in all the pages

sphinx/domains/c.py

@@ -42,7 +42,7 @@ from sphinx.util.docutils import SphinxDirective
 from sphinx.util.nodes import make_refnode
 
 if TYPE_CHECKING:
-    from collections.abc import Generator, Iterator
+    from collections.abc import Generator, Iterator, Sequence
 
     from docutils.nodes import Element, Node, TextElement, system_message
 
@@ -2197,11 +2197,11 @@ class DefinitionParser(BaseParser):
         return 'C'
 
     @property
-    def id_attributes(self):
+    def id_attributes(self) -> Sequence[str]:
         return self.config.c_id_attributes
 
     @property
-    def paren_attributes(self):
+    def paren_attributes(self) -> Sequence[str]:
         return self.config.c_paren_attributes
 
     def _parse_string(self) -> str | None:

sphinx/domains/cpp.py

@@ -43,7 +43,7 @@ from sphinx.util.docutils import SphinxDirective
 from sphinx.util.nodes import make_refnode
 
 if TYPE_CHECKING:
-    from collections.abc import Generator, Iterator
+    from collections.abc import Generator, Iterator, Sequence
 
     from docutils.nodes import Element, Node, TextElement, system_message
 
@@ -2880,7 +2880,7 @@ class ASTDeclaratorMemPtr(ASTDeclarator):
         self.next.name = name
 
     @property
-    def isPack(self):
+    def isPack(self) -> bool:
         return self.next.isPack
 
     @property
@@ -2978,7 +2978,7 @@ class ASTDeclaratorParen(ASTDeclarator):
         self.inner.name = name
 
     @property
-    def isPack(self):
+    def isPack(self) -> bool:
         return self.inner.isPack or self.next.isPack
 
     @property
@@ -5240,11 +5240,11 @@ class DefinitionParser(BaseParser):
         return 'C++'
 
     @property
-    def id_attributes(self):
+    def id_attributes(self) -> Sequence[str]:
         return self.config.cpp_id_attributes
 
     @property
-    def paren_attributes(self):
+    def paren_attributes(self) -> Sequence[str]:
         return self.config.cpp_paren_attributes
 
     def _parse_string(self) -> str:

sphinx/locale/__init__.py

@@ -155,7 +155,7 @@ def init_console(
         locale_dir = _LOCALE_DIR
     try:
         # encoding is ignored
-        language, _ = locale.getlocale(locale.LC_MESSAGES)
+        language, _ = locale.getlocale(locale.LC_MESSAGES)  # type: ignore[attr-defined]
     except AttributeError:
         # LC_MESSAGES is not always defined. Fallback to the default language
         # in case it is not.

sphinx/testing/fixtures.py

@@ -26,7 +26,7 @@ DEFAULT_ENABLED_MARKERS = [
 ]
 
 
-def pytest_configure(config):
+def pytest_configure(config: pytest.Config) -> None:
     """Register custom markers"""
     for marker in DEFAULT_ENABLED_MARKERS:
         config.addinivalue_line('markers', marker)
@@ -175,7 +175,7 @@ def make_app(test_params: dict, monkeypatch: Any) -> Generator[Callable, None, N
     apps = []
     syspath = sys.path.copy()
 
-    def make(*args: Any, **kwargs: Any):
+    def make(*args: Any, **kwargs: Any) -> SphinxTestApp:
         status, warning = StringIO(), StringIO()
         kwargs.setdefault('status', status)
         kwargs.setdefault('warning', warning)
@@ -226,7 +226,7 @@ def sphinx_test_tempdir(tmp_path_factory: Any) -> Path:
 
 
 @pytest.fixture()
-def rollback_sysmodules():  # NoQA: PT004
+def rollback_sysmodules() -> Generator[None, None, None]:  # NoQA: PT004
     """
     Rollback sys.modules to its value before testing to unload modules
     during tests.

sphinx/util/__init__.py

@@ -104,7 +104,7 @@ class FilenameUniqDict(dict):
         self._existing = state
 
 
-def _md5(data=b'', **_kw: Any):
+def _md5(data: bytes = b'', **_kw: Any) -> hashlib._Hash:
     """Deprecated wrapper around hashlib.md5
 
     To be removed in Sphinx 9.0
@@ -112,7 +112,7 @@ def _md5(data=b'', **_kw: Any):
     return hashlib.md5(data, usedforsecurity=False)
 
 
-def _sha1(data=b'', **_kw: Any):
+def _sha1(data: bytes = b'', **_kw: Any) -> hashlib._Hash:
     """Deprecated wrapper around hashlib.sha1
 
     To be removed in Sphinx 9.0

sphinx/util/cfamily.py

@@ -12,6 +12,8 @@ from sphinx import addnodes
 from sphinx.util import logging
 
 if TYPE_CHECKING:
+    from collections.abc import Sequence
+
     from docutils.nodes import TextElement
 
     from sphinx.config import Config
@@ -369,11 +371,11 @@ class BaseParser:
     ################################################################################
 
     @property
-    def id_attributes(self):
+    def id_attributes(self) -> Sequence[str]:
         raise NotImplementedError
 
     @property
-    def paren_attributes(self):
+    def paren_attributes(self) -> Sequence[str]:
         raise NotImplementedError
 
     def _parse_balanced_token_seq(self, end: list[str]) -> str:

sphinx/writers/html5.py

@@ -928,7 +928,7 @@ class HTML5Translator(SphinxTranslator, BaseTranslator):
 
     # See Docutils r9413
     # Re-instate the footnote-reference class
-    def visit_footnote_reference(self, node):
+    def visit_footnote_reference(self, node: Element) -> None:
         href = '#' + node['refid']
         classes = ['footnote-reference', self.settings.footnote_references]
         self.body.append(self.starttag(node, 'a', suffix='', classes=classes,

utils/babel_runner.py

@@ -70,7 +70,7 @@ OPTIONS_MAP = {
 KEYWORDS = {**DEFAULT_KEYWORDS, '_': None, '__': None}
 
 
-def run_extract():
+def run_extract() -> None:
     """Message extraction function."""
     log = _get_logger()
 
@@ -115,7 +115,7 @@ def run_extract():
         write_po(outfile, catalogue)
 
 
-def run_update():
+def run_update() -> None:
     """Catalog merging command."""
 
     log = _get_logger()
@@ -150,7 +150,7 @@ def run_update():
         os.replace(tmp_name, filename)
 
 
-def run_compile():
+def run_compile() -> None:
     """
     Catalog compilation command.
 

utils/bump_docker.py

@@ -34,7 +34,7 @@ for file in DOCKERFILE_BASE, DOCKERFILE_LATEXPDF:
     file.write_text(content, encoding='utf-8')
 
 
-def git(*args: str):
+def git(*args: str) -> None:
     ret = subprocess.run(('git', *args),
                          capture_output=True,
                          cwd=DOCKER_ROOT,

utils/bump_version.py

@@ -21,7 +21,7 @@ def stringify_version(version_info, in_develop=True):
     return version
 
 
-def bump_version(path, version_info, in_develop=True):
+def bump_version(path, version_info, in_develop=True) -> None:
     version = stringify_version(version_info, in_develop)
 
     with open(path, encoding='utf-8') as f:
@@ -91,7 +91,7 @@ class Changes:
         self.path = path
         self.fetch_version()
 
-    def fetch_version(self):
+    def fetch_version(self) -> None:
         with open(self.path, encoding='utf-8') as f:
             version = f.readline().strip()
             matched = re.search(r'^Release (.*) \((.*)\)$', version)
@@ -105,7 +105,7 @@ class Changes:
             else:
                 self.in_development = False
 
-    def finalize_release_date(self):
+    def finalize_release_date(self) -> None:
         release_date = time.strftime('%b %d, %Y')
         heading = f'Release {self.version} (released {release_date})'
 
@@ -120,7 +120,7 @@ class Changes:
             f.write('=' * len(heading) + '\n')
             f.write(self.filter_empty_sections(body))
 
-    def add_release(self, version_info):
+    def add_release(self, version_info) -> None:
         if version_info[-2:] in (('beta', 0), ('final', 0)):
             version = stringify_version(version_info)
         else:
@@ -158,7 +158,7 @@ def parse_options(argv):
     return options
 
 
-def main():
+def main() -> None:
     options = parse_options(sys.argv[1:])
 
     with processing("Rewriting sphinx/__init__.py"):