hermes-agent/tests/hermes_cli/test_update_venv_health.py
Teknium 87ae4ae94b
fix(update): harden #57659 follow-ups — task restore on failure, --force-venv split, trampoline detection, managed-install health (#57680)
Five follow-ups to #57659 from post-merge review:

1. install.ps1: gateway scheduled-task re-enable now runs in a finally
   (a thrown Remove-Item/uv venv failure previously stranded the user's
   gateway autostart disabled), and tasks that were already disabled
   before the install are no longer blindly re-enabled.
2. The venv-python holder guard is no longer bypassed by plain --force
   (which the desktop bootstrap passes on every update while its lock
   probe only checks hermes.exe/app.asar). New explicit --force-venv is
   the escape hatch; --force keeps bypassing only the hermes.exe shim
   guard.
3. _detect_venv_python_processes now also catches uv/base-interpreter
   trampolines whose exe is outside the venv, via cmdline (venv path or
   '-m hermes_cli.main' tied to this install root) and cwd.
4. Missing venv python is now UNHEALTHY on managed installs
   (.hermes-bootstrap-complete / .update-incomplete markers) so the
   repair lane runs instead of 'Already up to date!'; the repair branch
   recreates the venv first when it's gone entirely. Dev checkouts keep
   reporting healthy.
5. install.ps1 comment no longer claims a Startup-folder disarm the
   code doesn't perform (logon-only, not a mid-install respawner).
2026-07-03 04:08:37 -07:00

346 lines
12 KiB
Python

"""Tests for the Windows half-updated-venv hardening (July 2026 incident).
Covers three additions to ``hermes update``:
1. ``_venv_core_imports_healthy`` — the venv health probe that lets an
"Already up to date" checkout still repair a broken dependency install.
2. ``_detect_venv_python_processes`` — the venv-interpreter process guard
that refuses to mutate the venv while a desktop backend / stray python
holds .pyd files mapped.
3. The commit_count == 0 repair branch wiring in ``_cmd_update_impl``.
All Windows-specific paths are exercised via ``_is_windows`` patching so
they run on any host (same approach as test_update_concurrent_quarantine).
"""
from __future__ import annotations
import subprocess
import sys
import types
from types import SimpleNamespace
from unittest.mock import MagicMock, patch
import pytest
from hermes_cli import main as cli_main
# ---------------------------------------------------------------------------
# _venv_core_imports_healthy
# ---------------------------------------------------------------------------
def test_venv_health_reports_healthy_when_no_venv(tmp_path):
"""No venv python in a DEV checkout → nothing to probe → healthy."""
with patch.object(cli_main, "PROJECT_ROOT", tmp_path):
healthy, detail = cli_main._venv_core_imports_healthy()
assert healthy is True
assert detail == ""
def test_venv_health_missing_venv_unhealthy_on_managed_install(tmp_path):
"""On a managed install (bootstrap marker) the venv IS the install —
its absence must be reported unhealthy so the repair lane runs instead
of 'Already up to date!'."""
(tmp_path / ".hermes-bootstrap-complete").write_text("done")
with patch.object(cli_main, "PROJECT_ROOT", tmp_path):
healthy, detail = cli_main._venv_core_imports_healthy()
assert healthy is False
assert "venv python missing" in detail
def test_venv_health_missing_venv_unhealthy_with_interrupted_marker(tmp_path):
"""An interrupted-update breadcrumb also flips missing-venv to unhealthy."""
(tmp_path / ".update-incomplete").write_text("started=1\npid=1\n")
with patch.object(cli_main, "PROJECT_ROOT", tmp_path):
healthy, detail = cli_main._venv_core_imports_healthy()
assert healthy is False
assert "venv python missing" in detail
def _fake_venv_python(tmp_path, *, windows: bool = False):
bin_dir = tmp_path / "venv" / ("Scripts" if windows else "bin")
bin_dir.mkdir(parents=True)
py = bin_dir / ("python.exe" if windows else "python")
py.write_bytes(b"")
return py
def test_venv_health_reports_missing_imports(tmp_path):
"""Probe output lines are surfaced as the unhealthy detail."""
_fake_venv_python(tmp_path)
fake = SimpleNamespace(
returncode=0,
stdout="fastapi: No module named 'annotated_doc'\n",
stderr="",
)
with patch.object(cli_main, "PROJECT_ROOT", tmp_path), patch.object(
cli_main.subprocess, "run", return_value=fake
):
healthy, detail = cli_main._venv_core_imports_healthy()
assert healthy is False
assert "annotated_doc" in detail
def test_venv_health_healthy_when_probe_clean(tmp_path):
_fake_venv_python(tmp_path)
fake = SimpleNamespace(returncode=0, stdout="", stderr="")
with patch.object(cli_main, "PROJECT_ROOT", tmp_path), patch.object(
cli_main.subprocess, "run", return_value=fake
):
healthy, detail = cli_main._venv_core_imports_healthy()
assert healthy is True
def test_venv_health_broken_interpreter_is_unhealthy(tmp_path):
"""Nonzero exit with no module list = interpreter itself is broken."""
_fake_venv_python(tmp_path)
fake = SimpleNamespace(returncode=1, stdout="", stderr="Fatal Python error: init failed\n")
with patch.object(cli_main, "PROJECT_ROOT", tmp_path), patch.object(
cli_main.subprocess, "run", return_value=fake
):
healthy, detail = cli_main._venv_core_imports_healthy()
assert healthy is False
assert "Fatal Python error" in detail
def test_venv_health_probe_failure_reports_healthy(tmp_path):
"""A probe that can't run must NOT force needless reinstalls."""
_fake_venv_python(tmp_path)
with patch.object(cli_main, "PROJECT_ROOT", tmp_path), patch.object(
cli_main.subprocess,
"run",
side_effect=subprocess.TimeoutExpired(cmd="python", timeout=60),
):
healthy, _detail = cli_main._venv_core_imports_healthy()
assert healthy is True
# ---------------------------------------------------------------------------
# _detect_venv_python_processes
# ---------------------------------------------------------------------------
def _proc(pid: int, exe: str, name: str, cmdline: list[str] | None = None, cwd: str = ""):
proc = MagicMock()
proc.info = {
"pid": pid,
"exe": exe,
"name": name,
"cmdline": cmdline or [],
"cwd": cwd,
}
return proc
def test_detect_venv_python_off_windows_is_empty():
with patch.object(cli_main, "_is_windows", return_value=False):
assert cli_main._detect_venv_python_processes() == []
@patch.object(cli_main, "_is_windows", return_value=True)
def test_detect_venv_python_finds_backend(_winp, tmp_path):
venv_py = str(tmp_path / "venv" / "Scripts" / "python.exe")
other_py = "C:\\Python311\\python.exe"
me = MagicMock()
me.parents.return_value = []
fake_psutil = types.SimpleNamespace(
process_iter=lambda attrs: iter(
[
_proc(101, venv_py, "python.exe", ["python.exe", "-m", "hermes_cli.main", "serve"]),
_proc(102, other_py, "python.exe", ["python.exe", "somescript.py"]),
]
),
Process=lambda *a, **k: me,
)
with patch.object(cli_main, "PROJECT_ROOT", tmp_path), patch.dict(
sys.modules, {"psutil": fake_psutil}
):
matches = cli_main._detect_venv_python_processes()
assert [m[0] for m in matches] == [101]
assert "serve" in matches[0][2]
@patch.object(cli_main, "_is_windows", return_value=True)
def test_detect_venv_python_excludes_self_and_ancestors(_winp, tmp_path):
import os as _os
venv_py = str(tmp_path / "venv" / "Scripts" / "python.exe")
parent = MagicMock()
parent.pid = 555
me = MagicMock()
me.parents.return_value = [parent]
fake_psutil = types.SimpleNamespace(
process_iter=lambda attrs: iter(
[
_proc(_os.getpid(), venv_py, "python.exe"),
_proc(555, venv_py, "hermes.exe"),
]
),
Process=lambda *a, **k: me,
)
with patch.object(cli_main, "PROJECT_ROOT", tmp_path), patch.dict(
sys.modules, {"psutil": fake_psutil}
):
assert cli_main._detect_venv_python_processes() == []
@patch.object(cli_main, "_is_windows", return_value=True)
def test_detect_venv_python_no_psutil_is_empty(_winp, tmp_path):
with patch.object(cli_main, "PROJECT_ROOT", tmp_path), patch.dict(
sys.modules, {"psutil": None}
):
assert cli_main._detect_venv_python_processes() == []
def test_format_venv_holders_message_flags_desktop_backend(tmp_path):
matches = [
(101, "python.exe", "python.exe -m hermes_cli.main serve --host 127.0.0.1"),
(102, "pythonw.exe", "pythonw.exe -m hermes_cli.main gateway run"),
]
msg = cli_main._format_venv_python_holders_message(matches)
assert "101" in msg
assert "desktop app" in msg.lower()
assert "gateway" in msg
assert "hermes update" in msg
assert "--force-venv" in msg
@patch.object(cli_main, "_is_windows", return_value=True)
def test_detect_venv_python_catches_outside_venv_trampoline(_winp, tmp_path):
"""uv/base-interpreter trampoline: exe OUTSIDE the venv, but the cmdline
clearly runs Hermes from this install → must still be flagged as a holder
(it imports from the venv and holds its .pyd files)."""
base_py = "C:\\Python311\\python.exe"
venv_path = str(tmp_path / "venv" / "Scripts" / "python.exe")
me = MagicMock()
me.parents.return_value = []
fake_psutil = types.SimpleNamespace(
process_iter=lambda attrs: iter(
[
# cmdline references the venv path directly
_proc(201, base_py, "python.exe", [base_py, venv_path, "-m", "x"]),
# `-m hermes_cli.main serve` with the install root as cwd
_proc(
202,
base_py,
"python.exe",
[base_py, "-m", "hermes_cli.main", "serve"],
cwd=str(tmp_path),
),
# unrelated base-interpreter python → NOT a holder
_proc(203, base_py, "python.exe", [base_py, "somescript.py"], cwd="C:\\other"),
]
),
Process=lambda *a, **k: me,
)
with patch.object(cli_main, "PROJECT_ROOT", tmp_path), patch.dict(
sys.modules, {"psutil": fake_psutil}
):
matches = cli_main._detect_venv_python_processes()
assert sorted(m[0] for m in matches) == [201, 202]
@patch.object(cli_main, "_is_windows", return_value=True)
def test_detect_venv_hermes_cli_cmdline_outside_install_not_matched(_winp, tmp_path):
"""A hermes_cli.main process belonging to a DIFFERENT install (neither
install root in cmdline nor cwd under it) must not be flagged."""
base_py = "C:\\Python311\\python.exe"
me = MagicMock()
me.parents.return_value = []
fake_psutil = types.SimpleNamespace(
process_iter=lambda attrs: iter(
[
_proc(
301,
base_py,
"python.exe",
[base_py, "-m", "hermes_cli.main", "serve"],
cwd="C:\\other-install",
),
]
),
Process=lambda *a, **k: me,
)
with patch.object(cli_main, "PROJECT_ROOT", tmp_path), patch.dict(
sys.modules, {"psutil": fake_psutil}
):
assert cli_main._detect_venv_python_processes() == []
# ---------------------------------------------------------------------------
# --force vs --force-venv gating of the venv-holder guard
# ---------------------------------------------------------------------------
def _update_args(**overrides):
defaults = dict(
gateway=False,
check=False,
no_backup=True,
backup=False,
yes=True,
branch=None,
force=False,
force_venv=False,
)
defaults.update(overrides)
return SimpleNamespace(**defaults)
def _run_update_until_guard(args):
"""Drive _cmd_update_impl just far enough to hit the venv-holder guard.
Everything before the guard is stubbed; the guard firing is observed via
SystemExit(2). The first statement AFTER the guard is
``git_dir = PROJECT_ROOT / ".git"`` — a PROJECT_ROOT sentinel whose
``__truediv__`` raises marks 'guard passed'."""
class _PastGuard(Exception):
pass
class _RootSentinel:
def __truediv__(self, _other):
raise _PastGuard
with patch.object(cli_main, "_is_windows", return_value=True), patch.object(
cli_main, "_venv_scripts_dir", return_value=None
), patch.object(cli_main, "_run_pre_update_backup"), patch.object(
cli_main, "_pause_windows_gateways_for_update", return_value=None
), patch.object(
cli_main, "_resume_windows_gateways_after_update"
), patch.object(
cli_main,
"_detect_venv_python_processes",
return_value=[(101, "python.exe", "python.exe -m hermes_cli.main serve")],
), patch.object(
cli_main, "PROJECT_ROOT", _RootSentinel()
):
try:
cli_main._cmd_update_impl(args, gateway_mode=False)
except _PastGuard:
return "past_guard"
except SystemExit as exc:
return f"exit_{exc.code}"
return "returned"
@pytest.mark.parametrize(
"force,force_venv,expected",
[
(False, False, "exit_2"), # guard fires
(True, False, "exit_2"), # plain --force does NOT bypass the venv guard
(False, True, "past_guard"), # --force-venv is the explicit escape hatch
(True, True, "past_guard"),
],
)
def test_venv_holder_guard_force_semantics(force, force_venv, expected, capsys):
result = _run_update_until_guard(_update_args(force=force, force_venv=force_venv))
assert result == expected, capsys.readouterr().out