1 files changed, 34 insertions, 0 deletions
diff --git a/third_party/python/setuptools/setuptools/config/_validate_pyproject/__init__.py b/third_party/python/setuptools/setuptools/config/_validate_pyproject/__init__.py
new file mode 100644
index 0000000000..dbe6cb4ca4
--- /dev/null
+++ b/third_party/python/setuptools/setuptools/config/_validate_pyproject/__init__.py
@@ -0,0 +1,34 @@
+from functools import reduce
+from typing import Any, Callable, Dict
+
+from . import formats
+from .error_reporting import detailed_errors, ValidationError
+from .extra_validations import EXTRA_VALIDATIONS
+from .fastjsonschema_exceptions import JsonSchemaException, JsonSchemaValueException
+from .fastjsonschema_validations import validate as _validate
+
+__all__ = [
+    "validate",
+    "FORMAT_FUNCTIONS",
+    "EXTRA_VALIDATIONS",
+    "ValidationError",
+    "JsonSchemaException",
+    "JsonSchemaValueException",
+]
+
+
+FORMAT_FUNCTIONS: Dict[str, Callable[[str], bool]] = {
+    fn.__name__.replace("_", "-"): fn
+    for fn in formats.__dict__.values()
+    if callable(fn) and not fn.__name__.startswith("_")
+}
+
+
+def validate(data: Any) -> bool:
+    """Validate the given ``data`` object using JSON Schema
+    This function raises ``ValidationError`` if ``data`` is invalid.
+    """
+    with detailed_errors():
+        _validate(data, custom_formats=FORMAT_FUNCTIONS)
+    reduce(lambda acc, fn: fn(acc), EXTRA_VALIDATIONS, data)
+    return True