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-rw-r--r--src/pip/_internal/pyproject.py2
-rw-r--r--src/pip/_internal/req/req_install.py9
2 files changed, 10 insertions, 1 deletions
diff --git a/src/pip/_internal/pyproject.py b/src/pip/_internal/pyproject.py
index 57fef5707..eb8e12b2d 100644
--- a/src/pip/_internal/pyproject.py
+++ b/src/pip/_internal/pyproject.py
@@ -91,7 +91,7 @@ def load_pyproject_toml(
# If we haven't worked out whether to use PEP 517 yet,
# and the user hasn't explicitly stated a preference,
# we do so if the project has a pyproject.toml file
- # or if we cannot import setuptools.
+ # or if we cannot import setuptools or wheels.
# We fallback to PEP 517 when without setuptools or without the wheel package,
# so setuptools can be installed as a default build backend.
diff --git a/src/pip/_internal/req/req_install.py b/src/pip/_internal/req/req_install.py
index a0ea58bd1..d01b24a91 100644
--- a/src/pip/_internal/req/req_install.py
+++ b/src/pip/_internal/req/req_install.py
@@ -486,6 +486,15 @@ class InstallRequirement:
)
if pyproject_toml_data is None:
+ if self.config_settings:
+ deprecated(
+ reason=f"Config settings are ignored for project {self}.",
+ replacement=(
+ "to use --use-pep517 or add a "
+ "pyproject.toml file to the project"
+ ),
+ gone_in="23.3",
+ )
self.use_pep517 = False
return