Show Python path for Poetry in debug info (#10588)

Author: jaredahern

src/poetry/console/commands/debug/info.py

@@ -2,6 +2,8 @@
 
 import sys
 
+from pathlib import Path
+
 from poetry.console.commands.command import Command
 
 
@@ -17,8 +19,10 @@ def handle(self) -> int:
         self.line(
             "\n".join(
                 [
-                    f"<info>Version</info>: <comment>{self.poetry.VERSION}</>",
-                    f"<info>Python</info>:  <comment>{poetry_python_version}</>",
+                    f"<info>Version</info>:    <comment>{self.poetry.VERSION}</>",
+                    f"<info>Python</info>:     <comment>{poetry_python_version}</>",
+                    f"<info>Path</info>:       <comment>{Path(sys.prefix)}</>",
+                    f"<info>Executable</info>: <comment>{Path(sys.executable) if sys.executable else 'Unknown'}</>",
                 ]
             )
         )

tests/console/commands/debug/test_info.py

@@ -0,0 +1,69 @@
+from __future__ import annotations
+
+import sys
+
+from pathlib import Path
+from typing import TYPE_CHECKING
+
+import pytest
+
+from poetry.__version__ import __version__
+from poetry.utils.env import MockEnv
+
+
+if TYPE_CHECKING:
+    from cleo.testers.command_tester import CommandTester
+    from pytest_mock import MockerFixture
+
+    from tests.types import CommandTesterFactory
+
+
+@pytest.fixture(autouse=True)
+def setup(mocker: MockerFixture) -> None:
+    mocker.patch(
+        "poetry.utils.env.EnvManager.get",
+        return_value=MockEnv(
+            path=Path("/prefix"), base=Path("/base/prefix"), is_venv=True
+        ),
+    )
+    mocker.patch(
+        "sys.prefix",
+        "/poetry/prefix",
+    )
+    mocker.patch(
+        "sys.executable",
+        "/poetry/prefix/bin/python",
+    )
+
+
+@pytest.fixture
+def tester(command_tester_factory: CommandTesterFactory) -> CommandTester:
+    return command_tester_factory("debug info")
+
+
+def test_debug_info_displays_complete_info(tester: CommandTester) -> None:
+    tester.execute()
+
+    expected = f"""
+Poetry
+Version:    {__version__}
+Python:     {".".join(str(v) for v in sys.version_info[:3])}
+Path:       {Path("/poetry/prefix")}
+Executable: {Path("/poetry/prefix/bin/python")}
+
+Virtualenv
+Python:         3.7.0
+Implementation: CPython
+Path:           {Path("/prefix")}
+Executable:     {Path(sys.executable)}
+Valid:          True
+
+Base
+Platform:   darwin
+OS:         posix
+Python:     {".".join(str(v) for v in sys.version_info[:3])}
+Path:       {Path("/base/prefix")}
+Executable: python
+"""
+
+    assert tester.io.fetch_output() == expected