Migrate mypy config to pyproject.toml

.gitignore

@@ -4,6 +4,7 @@
 _build
 .DS_Store
 .vscode
+.python-version
 docs/_static/pypi.svg
 .tox
 __pycache__

.pre-commit-config.yaml

@@ -43,6 +43,7 @@ repos:
     hooks:
       - id: mypy
         exclude: ^docs/conf.py
+        args: ["--config", "pyproject.toml"]
         additional_dependencies:
           - types-PyYAML
           - tomli >= 0.2.6, < 2.0.0
@@ -51,6 +52,7 @@ repos:
           - platformdirs >= 2.1.0
           - pytest
           - hypothesis
+          - aiohttp >= 3.7.4
 
   - repo: https://github.com/pre-commit/mirrors-prettier
     rev: v3.0.3

pyproject.toml

@@ -223,3 +223,26 @@ omit = [
 ]
 [tool.coverage.run]
 relative_files = true
+
+[tool.mypy]
+# Specify the target platform details in config, so your developers are
+# free to run mypy on Windows, Linux, or macOS and get consistent
+# results.
+python_version = "3.8"
+mypy_path = "src"
+strict = true
+# Unreachable blocks have been an issue when compiling mypyc, let's try to avoid 'em in the first place.
+warn_unreachable = true
+implicit_reexport = true
+show_error_codes = true
+show_column_numbers = true
+
+[[tool.mypy.overrides]]
+module = ["pathspec.*", "IPython.*", "colorama.*", "tokenize_rt.*", "uvloop.*", "_black_version.*"]
+ignore_missing_imports = true
+
+# CI only checks src/, but in case users are running LSP or similar we explicitly ignore
+# errors in test data files.
+[[tool.mypy.overrides]]
+module = ["tests.data.*", "scripts.*"]
+ignore_errors = true

src/blackd/__init__.py

@@ -74,7 +74,7 @@ def main(bind_host: str, bind_port: int) -> None:
     app = make_app()
     ver = black.__version__
     black.out(f"blackd version {ver} listening on {bind_host} port {bind_port}")
-    web.run_app(app, host=bind_host, port=bind_port, handle_signals=True, print=None)
+    web.run_app(app, host=bind_host, port=bind_port, handle_signals=True, print=None)  # type: ignore[arg-type]
 
 
 def make_app() -> web.Application:

tests/optional.py

@@ -26,7 +26,7 @@
     from pytest import StashKey
 except ImportError:
     # pytest < 7
-    from _pytest.store import StoreKey as StashKey  # type: ignore[no-redef]
+    from _pytest.store import StoreKey as StashKey  # type: ignore[import, no-redef]
 
 log = logging.getLogger(__name__)
 

tests/test_blackd.py

@@ -31,7 +31,7 @@ def unittest_run_loop(func, *args, **kwargs):
 
 
 @pytest.mark.blackd
-class BlackDTestCase(AioHTTPTestCase):  # type: ignore[misc]
+class BlackDTestCase(AioHTTPTestCase):
     def test_blackd_main(self) -> None:
         with patch("blackd.web.run_app"):
             result = CliRunner().invoke(blackd.main, [])