Account for pure/plat lib differences in env

When detecting installed packages, ensure that we check both purelib
and platlib site directories when determining if a package is a
standard package.

poetry/repositories/installed_repository.py

@@ -75,11 +75,7 @@ class InstalledRepository(Repository):
 
                 repo.add_package(package)
 
-                is_standard_package = True
-                try:
-                    path.relative_to(env.site_packages)
-                except ValueError:
-                    is_standard_package = False
+                is_standard_package = env.is_path_relative_to_lib(path)
 
                 if is_standard_package:
                     if path.name.endswith(".dist-info"):

poetry/utils/env.py

@@ -754,6 +754,8 @@ class Env(object):
         self._site_packages = None
         self._paths = None
         self._supported_tags = None
+        self._purelib = None
+        self._platlib = None
 
     @property
     def path(self):  # type: () -> Path
@@ -810,11 +812,38 @@ class Env(object):
     @property
     def site_packages(self):  # type: () -> Path
         if self._site_packages is None:
-            self._site_packages = Path(self.paths["purelib"])
+            self._site_packages = Path(self.purelib)
 
         return self._site_packages
 
     @property
+    def purelib(self):  # type: () -> Path
+        if self._purelib is None:
+            self._purelib = Path(self.paths["purelib"])
+
+        return self._purelib
+
+    @property
+    def platlib(self):  # type: () -> Path
+        if self._platlib is None:
+            if "platlib" in self.paths:
+                self._platlib = Path(self.paths["platlib"])
+            else:
+                self._platlib = self.purelib
+
+        return self._platlib
+
+    def is_path_relative_to_lib(self, path):  # type: (Path) -> bool
+        for lib_path in [self.purelib, self.platlib]:
+            try:
+                path.relative_to(lib_path)
+                return True
+            except ValueError:
+                pass
+
+        return False
+
+    @property
     def sys_path(self):  # type: () -> List[str]
         raise NotImplementedError()
 

tests/repositories/fixtures/installed/lib64/python3.7/site-packages/lib64-2.3.4.dist-info/METADATA

+Metadata-Version: 2.1
+Name: lib64
+Version: 2.3.4
+Summary: lib64 description.
+License: MIT
+Keywords: cli,commands
+Author: Foo Bar
+Author-email: foo@bar.com
+Requires-Python: >=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*
+Classifier: License :: OSI Approved :: MIT License
+Classifier: Programming Language :: Python :: 2
+Classifier: Programming Language :: Python :: 2.7
+Classifier: Programming Language :: Python :: 3
+Classifier: Programming Language :: Python :: 3.4
+Classifier: Programming Language :: Python :: 3.5
+Classifier: Programming Language :: Python :: 3.6
+Classifier: Programming Language :: Python :: 3.7
+Classifier: Programming Language :: Python :: 3.8
+Description-Content-Type: text/x-rst
+
+lib64
+####

tests/repositories/test_installed_repository.py

+from typing import Optional
+
 import pytest
 
+from poetry.core.packages import Package
 from poetry.repositories.installed_repository import InstalledRepository
 from poetry.utils._compat import PY36
 from poetry.utils._compat import Path
@@ -11,25 +14,34 @@ from pytest_mock.plugin import MockFixture
 
 FIXTURES_DIR = Path(__file__).parent / "fixtures"
 ENV_DIR = (FIXTURES_DIR / "installed").resolve()
-SITE_PACKAGES = ENV_DIR / "lib" / "python3.7" / "site-packages"
+SITE_PURELIB = ENV_DIR / "lib" / "python3.7" / "site-packages"
+SITE_PLATLIB = ENV_DIR / "lib64" / "python3.7" / "site-packages"
 SRC = ENV_DIR / "src"
 VENDOR_DIR = ENV_DIR / "vendor" / "py3.7"
 INSTALLED_RESULTS = [
-    metadata.PathDistribution(SITE_PACKAGES / "cleo-0.7.6.dist-info"),
+    metadata.PathDistribution(SITE_PURELIB / "cleo-0.7.6.dist-info"),
     metadata.PathDistribution(SRC / "pendulum" / "pendulum.egg-info"),
     metadata.PathDistribution(
-        zipp.Path(str(SITE_PACKAGES / "foo-0.1.0-py3.8.egg"), "EGG-INFO")
+        zipp.Path(str(SITE_PURELIB / "foo-0.1.0-py3.8.egg"), "EGG-INFO")
     ),
     metadata.PathDistribution(VENDOR_DIR / "attrs-19.3.0.dist-info"),
-    metadata.PathDistribution(SITE_PACKAGES / "editable-2.3.4.dist-info"),
-    metadata.PathDistribution(SITE_PACKAGES / "editable-with-import-2.3.4.dist-info"),
+    metadata.PathDistribution(SITE_PURELIB / "editable-2.3.4.dist-info"),
+    metadata.PathDistribution(SITE_PURELIB / "editable-with-import-2.3.4.dist-info"),
+    metadata.PathDistribution(SITE_PLATLIB / "lib64-2.3.4.dist-info"),
 ]
 
 
 class MockEnv(BaseMockEnv):
     @property
-    def site_packages(self):  # type: () -> Path
-        return SITE_PACKAGES
+    def paths(self):
+        return {
+            "purelib": SITE_PURELIB,
+            "platlib": SITE_PLATLIB,
+        }
+
+    @property
+    def sys_path(self):
+        return [ENV_DIR, SITE_PLATLIB, SITE_PURELIB]
 
 
 @pytest.fixture
@@ -58,17 +70,27 @@ def repository(mocker, env):  # type: (MockFixture, MockEnv) -> InstalledReposit
     return InstalledRepository.load(env)
 
 
+def get_package_from_repository(
+    name, repository
+):  # type: (str, InstalledRepository) -> Optional[Package]
+    for pkg in repository.packages:
+        if pkg.name == name:
+            return pkg
+    return None
+
+
 def test_load_successful(repository):
-    assert len(repository.packages) == 5
+    assert len(repository.packages) == len(INSTALLED_RESULTS) - 1
 
 
 def test_load_ensure_isolation(repository):
-    for pkg in repository.packages:
-        assert pkg.name != "attrs"
+    package = get_package_from_repository("attrs", repository)
+    assert package is None
 
 
 def test_load_standard_package(repository):
-    cleo = repository.packages[0]
+    cleo = get_package_from_repository("cleo", repository)
+    assert cleo is not None
     assert cleo.name == "cleo"
     assert cleo.version.text == "0.7.6"
     assert (
@@ -76,13 +98,14 @@ def test_load_standard_package(repository):
         == "Cleo allows you to create beautiful and testable command-line interfaces."
     )
 
-    foo = repository.packages[3]
-    assert foo.name == "foo"
+    foo = get_package_from_repository("foo", repository)
+    assert foo is not None
     assert foo.version.text == "0.1.0"
 
 
 def test_load_git_package(repository):
-    pendulum = repository.packages[4]
+    pendulum = get_package_from_repository("pendulum", repository)
+    assert pendulum is not None
     assert pendulum.name == "pendulum"
     assert pendulum.version.text == "2.0.5"
     assert pendulum.description == "Python datetimes made easy"
@@ -91,12 +114,20 @@ def test_load_git_package(repository):
     assert pendulum.source_reference == "bb058f6b78b2d28ef5d9a5e759cfa179a1a713d6"
 
 
+def test_load_platlib_package(repository):
+    lib64 = get_package_from_repository("lib64", repository)
+    assert lib64 is not None
+    assert lib64.name == "lib64"
+    assert lib64.version.text == "2.3.4"
+
+
 @pytest.mark.skipif(
     not PY36, reason="pathlib.resolve() does not support strict argument"
 )
 def test_load_editable_package(repository):
     # test editable package with text .pth file
-    editable = repository.packages[1]
+    editable = get_package_from_repository("editable", repository)
+    assert editable is not None
     assert editable.name == "editable"
     assert editable.version.text == "2.3.4"
     assert editable.source_type == "directory"
@@ -108,7 +139,8 @@ def test_load_editable_package(repository):
 
 def test_load_editable_with_import_package(repository):
     # test editable package with executable .pth file
-    editable = repository.packages[2]
+    editable = get_package_from_repository("editable-with-import", repository)
+    assert editable is not None
     assert editable.name == "editable-with-import"
     assert editable.version.text == "2.3.4"
     assert editable.source_type == ""