Merge pull request #13022 from hauntsaninja/mypy112

Upgrade to mypy 1.12.1

.pre-commit-config.yaml

@@ -28,7 +28,7 @@ repos:
       args: [--fix, --exit-non-zero-on-fix]
 
 - repo: https://github.com/pre-commit/mirrors-mypy
-  rev: v1.10.0
+  rev: v1.12.1
   hooks:
   - id: mypy
     exclude: tests/data

src/pip/_internal/cli/parser.py

@@ -6,7 +6,7 @@
 import sys
 import textwrap
 from contextlib import suppress
-from typing import Any, Dict, Generator, List, Optional, Tuple
+from typing import Any, Dict, Generator, List, NoReturn, Optional, Tuple
 
 from pip._internal.cli.status_codes import UNKNOWN_ERROR
 from pip._internal.configuration import Configuration, ConfigurationError
@@ -289,6 +289,6 @@ def get_default_values(self) -> optparse.Values:
                 defaults[option.dest] = option.check_value(opt_str, default)
         return optparse.Values(defaults)
 
-    def error(self, msg: str) -> None:
+    def error(self, msg: str) -> NoReturn:
         self.print_usage(sys.stderr)
         self.exit(UNKNOWN_ERROR, f"{msg}\n")

src/pip/_internal/cli/progress_bars.py

@@ -25,7 +25,7 @@ def _rich_progress_bar(
     iterable: Iterable[bytes],
     *,
     bar_type: str,
-    size: int,
+    size: Optional[int],
 ) -> Generator[bytes, None, None]:
     assert bar_type == "on", "This should only be used in the default mode."
 

src/pip/_internal/locations/_distutils.py

@@ -21,7 +21,7 @@
 from distutils.command.install import SCHEME_KEYS
 from distutils.command.install import install as distutils_install_command
 from distutils.sysconfig import get_python_lib
-from typing import Dict, List, Optional, Union, cast
+from typing import Dict, List, Optional, Union
 
 from pip._internal.models.scheme import Scheme
 from pip._internal.utils.compat import WINDOWS
@@ -64,7 +64,7 @@ def distutils_scheme(
     obj: Optional[DistutilsCommand] = None
     obj = d.get_command_obj("install", create=True)
     assert obj is not None
-    i = cast(distutils_install_command, obj)
+    i: distutils_install_command = obj
     # NOTE: setting user or home has the side-effect of creating the home dir
     # or user base for installations during finalize_options()
     # ideally, we'd prefer a scheme class that has no side-effects.
@@ -78,7 +78,7 @@ def distutils_scheme(
     i.root = root or i.root
     i.finalize_options()
 
-    scheme = {}
+    scheme: Dict[str, str] = {}
     for key in SCHEME_KEYS:
         scheme[key] = getattr(i, "install_" + key)
 

src/pip/_internal/network/lazy_wheel.py

@@ -159,7 +159,7 @@ def _check_zip(self) -> None:
                 try:
                     # For read-only ZIP files, ZipFile only needs
                     # methods read, seek, seekable and tell.
-                    ZipFile(self)  # type: ignore
+                    ZipFile(self)
                 except BadZipFile:
                     pass
                 else:

src/pip/_internal/utils/misc.py

@@ -129,12 +129,7 @@ def rmtree(
         onexc = _onerror_ignore
     if onexc is None:
         onexc = _onerror_reraise
-    handler: OnErr = partial(
-        # `[func, path, Union[ExcInfo, BaseException]] -> Any` is equivalent to
-        # `Union[([func, path, ExcInfo] -> Any), ([func, path, BaseException] -> Any)]`.
-        cast(Union[OnExc, OnErr], rmtree_errorhandler),
-        onexc=onexc,
-    )
+    handler: OnErr = partial(rmtree_errorhandler, onexc=onexc)
     if sys.version_info >= (3, 12):
         # See https://docs.python.org/3.12/whatsnew/3.12.html#shutil.
         shutil.rmtree(dir, onexc=handler)  # type: ignore

tests/lib/test_wheel.py

@@ -80,7 +80,7 @@ def test_make_metadata_file_custom_value_overrides() -> None:
 
 def test_make_metadata_file_custom_contents() -> None:
     value = b"hello"
-    f = default_make_metadata(value=value)
+    f = default_make_metadata(value=value)  # type: ignore[arg-type]
     assert f is not None
     assert f.contents == value
 

tests/lib/wheel.py

@@ -109,7 +109,7 @@ def make_metadata_file(
 def make_wheel_metadata_file(
     name: str,
     version: str,
-    value: Defaulted[Optional[AnyStr]],
+    value: Defaulted[Union[bytes, str, None]],
     tags: Sequence[Tuple[str, str, str]],
     updates: Defaulted[Dict[str, HeaderValue]],
 ) -> Optional[File]: