stubtest: per project --ignore-missing-stub (#8122)

stubs/xxhash/METADATA.toml

@@ -1 +1,4 @@
 version = "3.0.*"
+
+[tool.stubtest]
+ignore_missing_stub = false

stubs/xxhash/xxhash.pyi

@@ -4,6 +4,9 @@ from typing_extensions import SupportsIndex, final
 
 VERSION: str
 XXHASH_VERSION: str
+VERSION_TUPLE: tuple[int, ...]
+
+algorithms_available: set[str]
 
 class _IntDigestHash(_Hash):
     @property

tests/check_consistent.py

@@ -20,7 +20,7 @@ import tomli
 
 consistent_files = [{"stdlib/@python2/builtins.pyi", "stdlib/@python2/__builtin__.pyi"}]
 metadata_keys = {"version", "requires", "extra_description", "obsolete_since", "no_longer_updated", "tool"}
-tool_keys = {"stubtest": {"skip", "apt_dependencies"}}
+tool_keys = {"stubtest": {"skip", "apt_dependencies", "ignore_missing_stub"}}
 allowed_files = {"README.md"}
 
 

tests/stubtest_third_party.py

@@ -66,19 +66,17 @@ def run_stubtest(dist: Path, *, verbose: bool = False) -> bool:
             print_command_failure("Failed to install", e)
             return False
 
+        ignore_missing_stub = ["--ignore-missing-stub"] if stubtest_meta.get("ignore_missing_stub", True) else []
         packages_to_check = [d.name for d in dist.iterdir() if d.is_dir() and d.name.isidentifier()]
         modules_to_check = [d.stem for d in dist.iterdir() if d.is_file() and d.suffix == ".pyi"]
         stubtest_cmd = [
             python_exe,
             "-m",
             "mypy.stubtest",
-            # Use --ignore-missing-stub, because if someone makes a correct addition, they'll need to
-            # also make a allowlist change and if someone makes an incorrect addition, they'll run into
-            # false negatives.
-            "--ignore-missing-stub",
             # Use --custom-typeshed-dir in case we make linked changes to stdlib or _typeshed
             "--custom-typeshed-dir",
             str(dist.parent.parent),
+            *ignore_missing_stub,
             *packages_to_check,
             *modules_to_check,
         ]