From 8b0f2c96ef78b2178c72216a0b211bd179cad4e3 Mon Sep 17 00:00:00 2001
From: Cristian Le <cristian.le@mpsd.mpg.de>
Date: Thu, 29 Aug 2024 13:43:45 +0200
Subject: [PATCH] Gate site_packages CMake prefix

Signed-off-by: Cristian Le <cristian.le@mpsd.mpg.de>
---
 src/scikit_build_core/builder/builder.py        |  6 ++++--
 src/scikit_build_core/settings/skbuild_model.py | 14 ++++++++++++++
 2 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/src/scikit_build_core/builder/builder.py b/src/scikit_build_core/builder/builder.py
index db11bb4c..3d0980b8 100644
--- a/src/scikit_build_core/builder/builder.py
+++ b/src/scikit_build_core/builder/builder.py
@@ -132,10 +132,12 @@ def configure(
 
         # Add site-packages to the prefix path for CMake
         site_packages = Path(sysconfig.get_path("purelib"))
-        self.config.prefix_dirs.append(site_packages)
+        if self.settings.search.use_install_prefix:
+            self.config.prefix_dirs.append(site_packages)
         logger.debug("SITE_PACKAGES: {}", site_packages)
         if site_packages != DIR.parent.parent:
-            self.config.prefix_dirs.append(DIR.parent.parent)
+            if self.settings.search.use_build_prefix:
+                self.config.prefix_dirs.append(DIR.parent.parent)
             logger.debug("Extra SITE_PACKAGES: {}", site_packages)
 
         # Add the FindPython backport if needed
diff --git a/src/scikit_build_core/settings/skbuild_model.py b/src/scikit_build_core/settings/skbuild_model.py
index b33e0083..c6c89a59 100644
--- a/src/scikit_build_core/settings/skbuild_model.py
+++ b/src/scikit_build_core/settings/skbuild_model.py
@@ -80,6 +80,19 @@ class CMakeSettings:
     """
 
 
+@dataclasses.dataclass
+class SearchSettings:
+    use_install_prefix: bool = True
+    """
+    Add the wheel install path to the CMake prefix paths.
+    """
+
+    use_build_prefix: bool = True
+    """
+    Add the wheel build path to the CMake prefix paths.
+    """
+
+
 @dataclasses.dataclass
 class NinjaSettings:
     minimum_version: Optional[Version] = None
@@ -325,6 +338,7 @@ class ScikitBuildSettings:
     install: InstallSettings = dataclasses.field(default_factory=InstallSettings)
     generate: List[GenerateSettings] = dataclasses.field(default_factory=list)
     messages: MessagesSettings = dataclasses.field(default_factory=MessagesSettings)
+    search: SearchSettings = dataclasses.field(default_factory=SearchSettings)
 
     metadata: Dict[str, Dict[str, Any]] = dataclasses.field(default_factory=dict)
     """