installed repository: improve recognition of installed packages' type…

…s (especially relevant for installing project plugins if Poetry has been installed via pipx) (python-poetry#9547)

src/poetry/repositories/installed_repository.py

@@ -9,6 +9,7 @@
 
 from packaging.utils import canonicalize_name
 from poetry.core.packages.package import Package
+from poetry.core.packages.utils.utils import is_python_project
 from poetry.core.packages.utils.utils import url_to_path
 from poetry.core.utils.helpers import module_name
 
@@ -149,8 +150,7 @@ def create_package_from_distribution(
             ) = cls.get_package_vcs_properties_from_path(
                 env.path / "src" / canonicalize_name(distribution.metadata["name"])
             )
-        else:
-            # If not, it's a path dependency
+        elif is_python_project(path.parent):
             source_type = "directory"
             source_url = str(path.parent)
 

tests/repositories/test_installed_repository.py

@@ -422,3 +422,30 @@ def test_system_site_packages_source_type(
         package.name: package.source_type for package in installed_repository.packages
     }
     assert source_types == {"cleo": None, "directory-pep-610": "directory"}
+
+
+def test_pipx_shared_lib_site_packages(
+    tmp_path: Path,
+    poetry: Poetry,
+    site_purelib: Path,
+    caplog: LogCaptureFixture,
+) -> None:
+    """
+    Simulate pipx shared/lib/site-packages which is not relative to the venv path.
+    """
+    venv_path = tmp_path / "venv"
+    shared_lib_site_path = tmp_path / "site"
+    env = MockEnv(
+        path=venv_path, sys_path=[str(venv_path / "purelib"), str(shared_lib_site_path)]
+    )
+    dist_info = "cleo-0.7.6.dist-info"
+    shutil.copytree(site_purelib / dist_info, shared_lib_site_path / dist_info)
+    installed_repository = InstalledRepository.load(env)
+
+    assert len(installed_repository.packages) == 1
+    cleo_package = installed_repository.packages[0]
+    cleo_package.to_dependency()
+    # There must not be a warning
+    # that the package does not seem to be a valid Python package.
+    assert caplog.messages == []
+    assert cleo_package.source_type is None