make mypyc happy

Author: mr-c

mypy_self_check.ini

@@ -8,7 +8,7 @@ pretty = True
 always_false = MYPYC
 plugins = mypy.plugins.proper_plugin
 python_version = 3.9
-exclude = mypy/typeshed/|mypyc/test-data/|mypyc/lib-rt/
+exclude = mypy/typeshed/|mypyc/test-data/
 enable_error_code = ignore-without-code,redundant-expr
 enable_incomplete_feature = PreciseTupleTypes
 show_error_code_links = True

mypyc/build.py

@@ -22,10 +22,11 @@
 
 import hashlib
 import os.path
+from os import PathLike
 import re
 import sys
 import time
-from collections.abc import Iterable
+from collections.abc import Iterable, MutableSequence
 from typing import TYPE_CHECKING, Any, NamedTuple, NoReturn, Union, cast
 
 from mypy.build import BuildSource
@@ -139,7 +140,8 @@ class ModDesc(NamedTuple):
 
 __spawn = ccompiler.CCompiler.spawn
 
-def spawn(self: ccompiler.CCompiler, cmd: Iterable[str], **kwargs: Any) -> None:
+
+def spawn(self: ccompiler.CCompiler, cmd: MutableSequence[bytes | str | PathLike[str]], **kwargs: Any) -> None:
     compiler_type: str = self.compiler_type  # type: ignore[attr-defined]
     extra_options = EXTRA_FLAGS_PER_COMPILER_TYPE_PER_PATH_COMPONENT[compiler_type]
     new_cmd = list(cmd)

mypyc/lib-rt/setup.py

@@ -68,6 +68,7 @@ def spawn(self: ccompiler.CCompiler, cmd: Iterable[str], **kwargs: Any) -> None:
                     break
     __spawn(self, new_cmd, **kwargs)
 
+
 ccompiler.CCompiler.spawn = spawn  # type: ignore[method-assign]
 
 
@@ -123,9 +124,9 @@ def run(self) -> None:
     compiler = ccompiler.new_compiler()
     sysconfig.customize_compiler(compiler)
     cflags: list[str] = []
-    if compiler.compiler_type == "unix":
+    if compiler.compiler_type == "unix":  # type: ignore[attr-defined]
         cflags += ["-O3"]
-    elif compiler.compiler_type == "msvc":
+    elif compiler.compiler_type == "msvc":  # type: ignore[attr-defined]
         cflags += ["/O2"]
 
     setup(