fix: merge local poetry.toml configuration in PoetryPythonPathProvider if available

Author: finswimmer

src/poetry/utils/env/python/providers.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import contextlib
 import dataclasses
 import shutil
 import sysconfig
@@ -12,6 +13,7 @@
 from findpython.providers.path import PathProvider
 
 from poetry.config.config import Config
+from poetry.toml import TOMLFile
 from poetry.utils._compat import WINDOWS
 
 
@@ -43,7 +45,19 @@ def find_python_by_name(cls, name: str) -> findpython.PythonVersion | None:
 class PoetryPythonPathProvider(PathProvider):  # type: ignore[misc]
     @classmethod
     def base_installation_dir(cls) -> Path:
-        return Config.create().python_installation_dir
+        from poetry.factory import Factory
+
+        config = Config.create()
+
+        # Let's check if there is a local config file.
+        with contextlib.suppress(RuntimeError):
+            pyproject = Factory.locate()
+
+            local_config_file = TOMLFile(pyproject.parent / "poetry.toml")
+            if local_config_file.exists():
+                config.merge(local_config_file.read())
+
+        return config.python_installation_dir
 
     @classmethod
     def installation_dir(cls, version: Version, implementation: str) -> Path: