Prevent setup_requires patches from activating auto-discovery

1 files changed, 6 insertions, 1 deletions

diff --git a/setuptools/discovery.py b/setuptools/discovery.py
index 5c21199e..5ec5d584 100644
--- a/setuptools/discovery.py
+++ b/setuptools/discovery.py
@@ -273,8 +273,13 @@ class ConfigDiscovery:
     def __init__(self, distribution: "Distribution"):
         self.dist = distribution
         self._called = False
+        self._disabled = False
         self._root_dir: _Path  # delay so `src_root` can be set in dist
 
+    def _disable(self):
+        """Internal API to disable automatic discovery"""
+        self._disabled = True
+
     def __call__(self, force=False, name=True):
         """Automatically discover missing configuration fields
         and modifies the given ``distribution`` object in-place.
@@ -286,7 +291,7 @@ class ConfigDiscovery:
         directory changes), please use ``force=True`` (or create a new
         ``ConfigDiscovery`` instance).
         """
-        if force is False and self._called:
+        if force is False and (self._called or self._disabled):
             # Avoid overhead of multiple calls
             return