From f093ca33404710fac6728522b9013f449f4584d0 Mon Sep 17 00:00:00 2001
From: James Hilliard <james.hilliard1@gmail.com>
Date: Tue, 2 Nov 2021 01:12:42 -0600
Subject: [PATCH] Add check for compatible setuptools version.

In order to avoid a recursive dependency issue when parsing
the aiohttp version during install setuptools needs:
https://github.com/pypa/setuptools/commit/c457e68319555b7266e5e0802946c5b1b63e4d61

This implies we need setuptools 46.4.0 or newer.
---
 CHANGES/6205.bugfix | 1 +
 pyproject.toml      | 6 ++++++
 setup.py            | 7 ++++++-
 3 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 CHANGES/6205.bugfix

diff --git a/CHANGES/6205.bugfix b/CHANGES/6205.bugfix
new file mode 100644
index 00000000000..3569919c712
--- /dev/null
+++ b/CHANGES/6205.bugfix
@@ -0,0 +1 @@
+Add check for compatible ``setuptools`` version.
diff --git a/pyproject.toml b/pyproject.toml
index acccf615c8a..5478396b5ef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,3 +11,9 @@ issue_format = "`#{issue} <https://github.com/aio-libs/aiohttp/issues/{issue}>`_
 test-command = ""
 # don't build PyPy wheels, install from source instead
 skip = "pp*"
+
+[build-system]
+requires = [
+    "setuptools>=46.4.0",
+]
+build-backend = "setuptools.build_meta"
diff --git a/setup.py b/setup.py
index 17d51cbdd57..e82a0b27f9c 100644
--- a/setup.py
+++ b/setup.py
@@ -1,13 +1,18 @@
 import os
 import pathlib
 import sys
+from distutils.version import StrictVersion
 
-from setuptools import Extension, setup
+from setuptools import Extension, __version__ as setuptools_version, setup
 
 if sys.version_info < (3, 7):
     raise RuntimeError("aiohttp 4.x requires Python 3.7+")
 
 
+if StrictVersion(setuptools_version) < StrictVersion("46.4.0"):
+    raise RuntimeError("aiohttp 4.x requires setuptools 46.4.0+")
+
+
 NO_EXTENSIONS = bool(os.environ.get("AIOHTTP_NO_EXTENSIONS"))  # type: bool
 HERE = pathlib.Path(__file__).parent
 IS_GIT_REPO = (HERE / ".git").exists()