1 files changed, 33 insertions, 0 deletions
diff --git a/third_party/python/setuptools/setuptools/_reqs.py b/third_party/python/setuptools/setuptools/_reqs.py
new file mode 100644
index 0000000000..5d5b927fd8
--- /dev/null
+++ b/third_party/python/setuptools/setuptools/_reqs.py
@@ -0,0 +1,33 @@
+from typing import Callable, Iterable, Iterator, TypeVar, Union, overload
+
+import setuptools.extern.jaraco.text as text
+from setuptools.extern.packaging.requirements import Requirement
+
+_T = TypeVar("_T")
+_StrOrIter = Union[str, Iterable[str]]
+
+
+def parse_strings(strs: _StrOrIter) -> Iterator[str]:
+    """
+    Yield requirement strings for each specification in `strs`.
+
+    `strs` must be a string, or a (possibly-nested) iterable thereof.
+    """
+    return text.join_continuation(map(text.drop_comment, text.yield_lines(strs)))
+
+
+@overload
+def parse(strs: _StrOrIter) -> Iterator[Requirement]:
+    ...
+
+
+@overload
+def parse(strs: _StrOrIter, parser: Callable[[str], _T]) -> Iterator[_T]:
+    ...
+
+
+def parse(strs, parser=Requirement):
+    """
+    Replacement for ``pkg_resources.parse_requirements`` that uses ``packaging``.
+    """
+    return map(parser, parse_strings(strs))