make no-pip and no-setuptools config explicit

This makes the `virtualenv.options.no-pip` and
`virtualenv.options.no-setuptools` options explicitly available to
users.

We default these to false as otherwise it can cause breakages for
certain development tools.

docs/configuration.md

@@ -46,6 +46,8 @@ cache-dir = "/path/to/cache/directory"
 virtualenvs.create = true
 virtualenvs.in-project = null
 virtualenvs.options.always-copy = true
+virtualenvs.options.no-pip = false
+virtualenvs.options.no-setuptools = false
 virtualenvs.options.system-site-packages = false
 virtualenvs.path = "{cache-dir}/virtualenvs"  # /path/to/cache/directory/virtualenvs
 virtualenvs.prefer-active-python = false
@@ -148,11 +150,6 @@ Defaults to `true`.
 
 If set to `false`, poetry will install dependencies into the current python environment.
 
-{{% note %}}
-When setting this configuration to `false`, the Python environment used must have `pip`
-installed and available.
-{{% /note %}}
-
 ### `virtualenvs.in-project`
 
 **Type**: boolean
@@ -181,6 +178,37 @@ Defaults to `{cache-dir}/virtualenvs` (`{cache-dir}\virtualenvs` on Windows).
 If set to `true` the `--always-copy` parameter is passed to `virtualenv` on creation of the venv. Thus all needed files are copied into the venv instead of symlinked.
 Defaults to `false`.
 
+### `virtualenvs.options.no-pip`
+
+**Type**: boolean
+
+If set to `true` the `--no-pip` parameter is passed to `virtualenv` on creation of the venv. This means when a new
+virtual environment is created, `pip` will not be installed in the environment.
+Defaults to `false`.
+
+{{% note %}}
+Poetry, for its internal operations, uses the `pip` wheel embedded in the `virtualenv` package installed as a dependency
+in Poetry's runtime environment. If a user runs `poetry run pip` when this option is set to `true`, the `pip` the
+embedded instance of `pip` is used.
+
+You can safely set this, along with `no-setuptools`, to `true`, if you desire a virtual environment with no additional
+packages. This is desirable for production environments.
+{{% /note %}}
+
+### `virtualenvs.options.no-setuptools`
+
+**Type**: boolean
+
+If set to `true` the `--no-setuptools` parameter is passed to `virtualenv` on creation of the venv. This means when a new
+virtual environment is created, `setuptools` will not be installed in the environment. Poetry, for its internal operations,
+does not require `setuptools` and this can safely be set to `true`.
+Defaults to `false`.
+
+{{% warning %}}
+Some development tools like IDEs, make an assumption that `setuptools` (and other) packages are always present and
+available within a virtual environment. This can cause some features in these tools to not work as expected.
+{{% /warning %}}
+
 ### `virtualenvs.options.system-site-packages`
 
 **Type**: boolean

src/poetry/config/config.py

@@ -37,7 +37,16 @@ class Config:
             "create": True,
             "in-project": None,
             "path": os.path.join("{cache-dir}", "virtualenvs"),
-            "options": {"always-copy": False, "system-site-packages": False},
+            "options": {
+                "always-copy": False,
+                "system-site-packages": False,
+                # we default to False here in order to prevent development environment
+                # breakages for IDEs etc. as when working in these environments
+                # assumptions are often made about virtual environments having pip and
+                # setuptools.
+                "no-pip": False,
+                "no-setuptools": False,
+            },
             "prefer-active-python": False,
         },
         "experimental": {"new-installer": True, "system-git-client": False},

src/poetry/console/commands/config.py

@@ -72,6 +72,16 @@ To remove a repository (repo is a short alias for repositories):
                 boolean_normalizer,
                 False,
             ),
+            "virtualenvs.options.no-pip": (
+                boolean_validator,
+                boolean_normalizer,
+                False,
+            ),
+            "virtualenvs.options.no-setuptools": (
+                boolean_validator,
+                boolean_normalizer,
+                False,
+            ),
             "virtualenvs.path": (
                 str,
                 lambda val: str(Path(val)),

src/poetry/inspection/info.py

@@ -465,7 +465,7 @@ class PackageInfo:
             pass
 
         with ephemeral_environment(
-            with_pip=True, with_wheel=True, with_setuptools=True
+            flags={"no-pip": False, "no-setuptools": False, "no-wheel": False}
         ) as venv:
             # TODO: cache PEP 517 build environment corresponding to each project venv
             dest_dir = venv.path.parent / "dist"

src/poetry/utils/env.py

@@ -990,12 +990,6 @@ class EnvManager:
                 venv,
                 executable=executable,
                 flags=self._poetry.config.get("virtualenvs.options"),
-                # TODO: in a future version switch remove pip/setuptools/wheel
-                # poetry does not need them these exists today to not break developer
-                # environment assumptions
-                with_pip=True,
-                with_setuptools=True,
-                with_wheel=True,
             )
 
         # venv detection:
@@ -1833,9 +1827,6 @@ class NullEnv(SystemEnv):
 def ephemeral_environment(
     executable: str | Path | None = None,
     flags: dict[str, bool] = None,
-    with_pip: bool = False,
-    with_wheel: bool | None = None,
-    with_setuptools: bool | None = None,
 ) -> ContextManager[VirtualEnv]:
     with temporary_directory() as tmp_dir:
         # TODO: cache PEP 517 build environment corresponding to each project venv
@@ -1844,9 +1835,6 @@ def ephemeral_environment(
             path=venv_dir.as_posix(),
             executable=executable,
             flags=flags,
-            with_pip=with_pip,
-            with_wheel=with_wheel,
-            with_setuptools=with_setuptools,
         )
         yield VirtualEnv(venv_dir, venv_dir)
 

tests/console/commands/env/test_use.py

@@ -71,10 +71,12 @@ def test_activate_activates_non_existing_virtualenv_no_envs_file(
     mock_build_env.assert_called_with(
         venv_py37,
         executable="/usr/bin/python3.7",
-        flags={"always-copy": False, "system-site-packages": False},
-        with_pip=True,
-        with_setuptools=True,
-        with_wheel=True,
+        flags={
+            "always-copy": False,
+            "system-site-packages": False,
+            "no-pip": False,
+            "no-setuptools": False,
+        },
     )
 
     envs_file = TOMLFile(venv_cache / "envs.toml")

tests/console/commands/test_config.py

@@ -57,6 +57,8 @@ installer.parallel = true
 virtualenvs.create = true
 virtualenvs.in-project = null
 virtualenvs.options.always-copy = false
+virtualenvs.options.no-pip = false
+virtualenvs.options.no-setuptools = false
 virtualenvs.options.system-site-packages = false
 virtualenvs.path = {venv_path}  # {config_cache_dir / 'virtualenvs'}
 virtualenvs.prefer-active-python = false
@@ -82,6 +84,8 @@ installer.parallel = true
 virtualenvs.create = false
 virtualenvs.in-project = null
 virtualenvs.options.always-copy = false
+virtualenvs.options.no-pip = false
+virtualenvs.options.no-setuptools = false
 virtualenvs.options.system-site-packages = false
 virtualenvs.path = {venv_path}  # {config_cache_dir / 'virtualenvs'}
 virtualenvs.prefer-active-python = false
@@ -131,6 +135,8 @@ installer.parallel = true
 virtualenvs.create = false
 virtualenvs.in-project = null
 virtualenvs.options.always-copy = false
+virtualenvs.options.no-pip = false
+virtualenvs.options.no-setuptools = false
 virtualenvs.options.system-site-packages = false
 virtualenvs.path = {venv_path}  # {config_cache_dir / 'virtualenvs'}
 virtualenvs.prefer-active-python = false

tests/test_factory.py

@@ -299,6 +299,8 @@ def test_create_poetry_with_local_config(fixture_dir: FixtureDirGetter):
     assert not poetry.config.get("virtualenvs.in-project")
     assert not poetry.config.get("virtualenvs.create")
     assert not poetry.config.get("virtualenvs.options.always-copy")
+    assert not poetry.config.get("virtualenvs.options.no-pip")
+    assert not poetry.config.get("virtualenvs.options.no-setuptools")
     assert not poetry.config.get("virtualenvs.options.system-site-packages")
 
 

tests/utils/test_env.py

@@ -18,6 +18,7 @@ from poetry.core.semver.version import Version
 from poetry.core.toml.file import TOMLFile
 
 from poetry.factory import Factory
+from poetry.repositories.installed_repository import InstalledRepository
 from poetry.utils._compat import WINDOWS
 from poetry.utils.env import GET_BASE_PREFIX
 from poetry.utils.env import EnvCommandError
@@ -208,10 +209,12 @@ def test_activate_activates_non_existing_virtualenv_no_envs_file(
     m.assert_called_with(
         Path(tmp_dir) / f"{venv_name}-py3.7",
         executable="/usr/bin/python3.7",
-        flags={"always-copy": False, "system-site-packages": False},
-        with_pip=True,
-        with_setuptools=True,
-        with_wheel=True,
+        flags={
+            "always-copy": False,
+            "system-site-packages": False,
+            "no-pip": False,
+            "no-setuptools": False,
+        },
     )
 
     envs_file = TOMLFile(Path(tmp_dir) / "envs.toml")
@@ -343,10 +346,12 @@ def test_activate_activates_different_virtualenv_with_envs_file(
     m.assert_called_with(
         Path(tmp_dir) / f"{venv_name}-py3.6",
         executable="/usr/bin/python3.6",
-        flags={"always-copy": False, "system-site-packages": False},
-        with_pip=True,
-        with_setuptools=True,
-        with_wheel=True,
+        flags={
+            "always-copy": False,
+            "system-site-packages": False,
+            "no-pip": False,
+            "no-setuptools": False,
+        },
     )
 
     assert envs_file.exists()
@@ -404,10 +409,12 @@ def test_activate_activates_recreates_for_different_patch(
     build_venv_m.assert_called_with(
         Path(tmp_dir) / f"{venv_name}-py3.7",
         executable="/usr/bin/python3.7",
-        flags={"always-copy": False, "system-site-packages": False},
-        with_pip=True,
-        with_setuptools=True,
-        with_wheel=True,
+        flags={
+            "always-copy": False,
+            "system-site-packages": False,
+            "no-pip": False,
+            "no-setuptools": False,
+        },
     )
     remove_venv_m.assert_called_with(Path(tmp_dir) / f"{venv_name}-py3.7")
 
@@ -839,10 +846,12 @@ def test_create_venv_tries_to_find_a_compatible_python_executable_using_generic_
     m.assert_called_with(
         config_virtualenvs_path / f"{venv_name}-py3.7",
         executable="python3",
-        flags={"always-copy": False, "system-site-packages": False},
-        with_pip=True,
-        with_setuptools=True,
-        with_wheel=True,
+        flags={
+            "always-copy": False,
+            "system-site-packages": False,
+            "no-pip": False,
+            "no-setuptools": False,
+        },
     )
 
 
@@ -870,10 +879,12 @@ def test_create_venv_tries_to_find_a_compatible_python_executable_using_specific
     m.assert_called_with(
         config_virtualenvs_path / f"{venv_name}-py3.9",
         executable="python3.9",
-        flags={"always-copy": False, "system-site-packages": False},
-        with_pip=True,
-        with_setuptools=True,
-        with_wheel=True,
+        flags={
+            "always-copy": False,
+            "system-site-packages": False,
+            "no-pip": False,
+            "no-setuptools": False,
+        },
     )
 
 
@@ -960,10 +971,12 @@ def test_create_venv_uses_patch_version_to_detect_compatibility(
     m.assert_called_with(
         config_virtualenvs_path / f"{venv_name}-py{version.major}.{version.minor}",
         executable=None,
-        flags={"always-copy": False, "system-site-packages": False},
-        with_pip=True,
-        with_setuptools=True,
-        with_wheel=True,
+        flags={
+            "always-copy": False,
+            "system-site-packages": False,
+            "no-pip": False,
+            "no-setuptools": False,
+        },
     )
 
 
@@ -999,10 +1012,12 @@ def test_create_venv_uses_patch_version_to_detect_compatibility_with_executable(
     m.assert_called_with(
         config_virtualenvs_path / f"{venv_name}-py{version.major}.{version.minor - 1}",
         executable=f"python{version.major}.{version.minor - 1}",
-        flags={"always-copy": False, "system-site-packages": False},
-        with_pip=True,
-        with_setuptools=True,
-        with_wheel=True,
+        flags={
+            "always-copy": False,
+            "system-site-packages": False,
+            "no-pip": False,
+            "no-setuptools": False,
+        },
     )
 
 
@@ -1067,10 +1082,12 @@ def test_activate_with_in_project_setting_does_not_fail_if_no_venvs_dir(
     m.assert_called_with(
         poetry.file.parent / ".venv",
         executable="/usr/bin/python3.7",
-        flags={"always-copy": False, "system-site-packages": False},
-        with_pip=True,
-        with_setuptools=True,
-        with_wheel=True,
+        flags={
+            "always-copy": False,
+            "system-site-packages": False,
+            "no-pip": False,
+            "no-setuptools": False,
+        },
     )
 
     envs_file = TOMLFile(Path(tmp_dir) / "virtualenvs" / "envs.toml")
@@ -1118,6 +1135,36 @@ def test_env_system_packages(tmp_path: Path, poetry: Poetry):
     assert "include-system-site-packages = true" in pyvenv_cfg.read_text()
 
 
+@pytest.mark.parametrize(
+    ("flags", "packages"),
+    [
+        ({"no-pip": False}, {"pip", "wheel"}),
+        ({"no-pip": False, "no-wheel": True}, {"pip"}),
+        ({"no-pip": True}, set()),
+        ({"no-setuptools": False}, {"setuptools"}),
+        ({"no-setuptools": True}, set()),
+        ({"no-pip": True, "no-setuptools": False}, {"setuptools"}),
+        ({"no-wheel": False}, {"wheel"}),
+        ({}, set()),
+    ],
+)
+def test_env_no_pip(
+    tmp_path: Path, poetry: Poetry, flags: dict[str, bool], packages: set[str]
+):
+    venv_path = tmp_path / "venv"
+    EnvManager(poetry).build_venv(path=venv_path, flags=flags)
+    env = VirtualEnv(venv_path)
+    installed_repository = InstalledRepository.load(env=env, with_dependencies=True)
+    installed_packages = {
+        package.name
+        for package in installed_repository.packages
+        # workaround for BSD test environments
+        if package.name != "sqlite3"
+    }
+
+    assert installed_packages == packages
+
+
 def test_env_finds_the_correct_executables(tmp_dir: str, manager: EnvManager):
     venv_path = Path(tmp_dir) / "Virtual Env"
     manager.build_venv(str(venv_path), with_pip=True)
@@ -1268,10 +1315,12 @@ def test_create_venv_accepts_fallback_version_w_nonzero_patchlevel(
     m.assert_called_with(
         config_virtualenvs_path / f"{venv_name}-py3.5",
         executable="python3.5",
-        flags={"always-copy": False, "system-site-packages": False},
-        with_pip=True,
-        with_setuptools=True,
-        with_wheel=True,
+        flags={
+            "always-copy": False,
+            "system-site-packages": False,
+            "no-pip": False,
+            "no-setuptools": False,
+        },
     )