The system env can have packages in more than purelib and platlib

Signed-off-by: Aurélien Bompard <aurelien@bompard.org>

src/poetry/utils/env/base_env.py

@@ -219,8 +219,11 @@ def platlib(self) -> Path:
 
  return self._platlib
 
+ def _get_lib_dirs(self) -> list[Path]:
+ return [self.purelib, self.platlib]
+
  def is_path_relative_to_lib(self, path: Path) -> bool:
- for lib_path in [self.purelib, self.platlib]:
+ for lib_path in self._get_lib_dirs():
  with contextlib.suppress(ValueError):
  path.relative_to(lib_path)
  return True

src/poetry/utils/env/system_env.py

@@ -2,6 +2,7 @@
 
 import os
 import platform
+import site
 import sys
 import sysconfig
 
@@ -87,3 +88,6 @@ def get_pip_version(self) -> Version:
 
  def is_venv(self) -> bool:
  return self._path != self._base
+
+ def _get_lib_dirs(self) -> list[Path]:
+ return super()._get_lib_dirs() + [Path(d) for d in site.getsitepackages()]

tests/utils/test_env.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 
 import os
+import site
 import subprocess
 import sys
 
@@ -1475,8 +1476,13 @@ def test_env_system_packages_are_relative_to_lib(
  venv_path = tmp_path / "venv"
  EnvManager(poetry).build_venv(path=venv_path, flags={"system-site-packages": True})
  env = VirtualEnv(venv_path)
- pytest_dist = metadata.distribution("pytest")
- assert env.is_path_relative_to_lib(pytest_dist._path) # type: ignore[attr-defined]
+ site_dir = Path(site.getsitepackages()[-1])
+ dist = next(
+ p
+ for p in metadata.distributions()
+ if p._path.relative_to(site_dir) is not None # type: ignore[attr-defined]
+ )
+ assert env.is_path_relative_to_lib(dist._path) # type: ignore[attr-defined]
 
 
 @pytest.mark.parametrize(