Fix root package and directory dependency editable installation (#2505)

poetry/installation/pip_installer.py

@@ -181,7 +181,6 @@ class PipInstaller(BaseInstaller):
 
     def install_directory(self, package):
         from poetry.factory import Factory
-        from poetry.utils.env import NullEnv
         from poetry.utils.toml_file import TomlFile
 
         if package.root_dir:
@@ -215,7 +214,7 @@ class PipInstaller(BaseInstaller):
             from poetry.masonry.builders.editable import EditableBuilder
 
             builder = EditableBuilder(
-                Factory().create_poetry(pyproject.parent), NullEnv(), NullIO()
+                Factory().create_poetry(pyproject.parent), self._env, NullIO()
             )
 
             builder.build()

poetry/masonry/builders/editable.py

@@ -38,7 +38,7 @@ class EditableBuilder(Builder):
                     str(self._poetry.file), str(self._poetry.file.with_suffix(".tmp"))
                 )
                 try:
-                    self._env.run_pip("install", "-e", str(self._path))
+                    self._env.run_pip("install", "--no-deps", "-e", str(self._path))
                 finally:
                     shutil.move(
                         str(self._poetry.file.with_suffix(".tmp")),

tests/masonry/builders/test_editable.py

@@ -38,7 +38,9 @@ def test_build_should_temporarily_remove_the_pyproject_file(tmp_dir, mocker):
     builder = EditableBuilder(Factory().create_poetry(module_path), env, NullIO())
     builder.build()
 
-    expected = [[sys.executable, "-m", "pip", "install", "-e", str(module_path)]]
+    expected = [
+        [sys.executable, "-m", "pip", "install", "--no-deps", "-e", str(module_path)]
+    ]
     assert expected == env.executed
 
     assert 2 == move.call_count