chore: drop uses of distutils

The package is gone in Python 3.12. This affects unused code, which is now gone,
and some spread tests. The spread tests are still valid because they use older
bases, so just add a pyright exclusion for them.

rockcraft/utils.py

@@ -21,8 +21,6 @@
 import os
 import pathlib
 import shutil
-import sys
-from distutils.util import strtobool  # pylint: disable=deprecated-module
 from typing import NamedTuple
 
 import rockcraft.errors
@@ -38,12 +36,6 @@ class OSPlatform(NamedTuple):
     machine: str
 
 
-def is_managed_mode() -> bool:
-    """Check if rockcraft is running in a managed environment."""
-    managed_flag = os.getenv("CRAFT_MANAGED_MODE", "n")
-    return strtobool(managed_flag) == 1
-
-
 def get_managed_environment_home_path() -> pathlib.Path:
     """Path for home when running in managed environment."""
     return pathlib.Path("/root")
@@ -67,31 +59,6 @@ def get_managed_environment_snap_channel() -> str | None:
     return os.getenv("ROCKCRAFT_INSTALL_SNAP_CHANNEL")
 
 
-def confirm_with_user(
-    prompt: str, default: bool = False  # noqa: FBT001,FBT002
-) -> bool:
-    """Query user for yes/no answer.
-
-    If stdin is not a tty, the default value is returned.
-
-    If user returns an empty answer, the default value is returned.
-    returns default value.
-
-    :returns: True if answer starts with [yY], False if answer starts with [nN],
-        otherwise the default.
-    """
-    if is_managed_mode():
-        raise RuntimeError("confirmation not yet supported in managed-mode")
-
-    if not sys.stdin.isatty():
-        return default
-
-    choices = " [Y/n]: " if default else " [y/N]: "
-
-    reply = input(prompt + choices).lower().strip()
-    return reply[0] == "y" if reply else default
-
-
 def _find_command_path_in_root(root: str, command_name: str) -> str | None:
     """Find the path of a command in a given root path."""
     for bin_directory in (

tests/integration/plugins/python_source/setup.py

@@ -1,4 +1,4 @@
-from distutils.core import setup
+from setuptools import setup
 
 setup(
     name="hello",

tests/spread/rockcraft/plugin-python-3.6/src/setup.py

@@ -1,4 +1,4 @@
-from distutils.core import setup
+from distutils.core import setup  # pyright: ignore[reportMissingImports]
 
 setup(
     name="hello",

tests/spread/rockcraft/plugin-python/src/setup.py

@@ -1,4 +1,4 @@
-from distutils.core import setup
+from distutils.core import setup  # pyright: ignore[reportMissingImports]
 
 setup(
     name="hello",

tests/unit/test_utils.py

@@ -15,7 +15,6 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 from pathlib import Path
-from unittest.mock import call
 
 import pytest
 from rockcraft import utils
@@ -58,51 +57,3 @@ def test_get_managed_environment_snap_channel_none(monkeypatch):
     monkeypatch.delenv("ROCKCRAFT_INSTALL_SNAP_CHANNEL", raising=False)
 
     assert utils.get_managed_environment_snap_channel() is None
-
-
-def test_confirm_with_user_defaults_with_tty(mock_input, mock_isatty):
-    mock_input.return_value = ""
-    mock_isatty.return_value = True
-
-    assert utils.confirm_with_user("prompt", default=True) is True
-    assert mock_input.mock_calls == [call("prompt [Y/n]: ")]
-    mock_input.reset_mock()
-
-    assert utils.confirm_with_user("prompt", default=False) is False
-    assert mock_input.mock_calls == [call("prompt [y/N]: ")]
-
-
-def test_confirm_with_user_defaults_without_tty(mock_input, mock_isatty):
-    mock_isatty.return_value = False
-
-    assert utils.confirm_with_user("prompt", default=True) is True
-    assert utils.confirm_with_user("prompt", default=False) is False
-
-    assert mock_input.mock_calls == []
-
-
-@pytest.mark.parametrize(
-    ("user_input", "expected"),
-    [
-        ("y", True),
-        ("Y", True),
-        ("yes", True),
-        ("YES", True),
-        ("n", False),
-        ("N", False),
-        ("no", False),
-        ("NO", False),
-    ],
-)
-def test_confirm_with_user(user_input, expected, mock_input, mock_isatty):
-    mock_input.return_value = user_input
-
-    assert utils.confirm_with_user("prompt") == expected
-    assert mock_input.mock_calls == [call("prompt [y/N]: ")]
-
-
-def test_confirm_with_user_errors_in_managed_mode(mock_is_managed_mode):
-    mock_is_managed_mode.return_value = True
-
-    with pytest.raises(RuntimeError):
-        utils.confirm_with_user("prompt")