feat(web): weekly automatic updates with health check and rollback

A General-tab toggle (off by default) checks for and installs LEDMatrix and
plugin updates once a week, overnight in the configured timezone.

- Pre-update checks skip (and report) instead of forcing: local edits or
  commits, merge/live rebase, no upstream, low disk, missing health check, or
  a version that was already rolled back. An abandoned rebase (HEAD back on a
  branch) is cleared, since it would otherwise block every pull.
- The pull reuses the Update Code path (now perform_core_update(), which
  reports dependency install failures as data).
- ledmatrix-update-verify.service, started via a .path unit from a request
  file, restarts the services from its own cgroup, requires them to come up
  and stay up, and otherwise resets to the previous commit and reinstalls the
  previous requirements. It runs a copy of the checker taken before the pull.
- No SSH needed: switching the toggle on restarts the display service, which
  (as root) installs the two units from the repo templates for the web user.
  first_time_install.sh installs them too and takes --enable-auto-update /
  LEDMATRIX_AUTO_UPDATE (passed through by one-shot-install.sh).
- Plugins update after the code passes its check; failures, blocks and
  rollbacks raise an Overview banner and show under the toggle.

Tested end to end on a Pi: web-UI setup, a good update, a broken web service
and a broken display (both rolled back), a blocked local edit, and an
abandoned rebase found on the device.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
Chuck
2026-09-14 17:37:35 -04:00
co-authored by Claude Opus 5
parent 6d1cbfb70b
commit 1eed7ff485
24 changed files with 2796 additions and 192 deletions
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"""Weekly automatic updates (web_interface/auto_update.py).
The updater pulls code and restarts services unattended. These pin down that
it runs only when asked and due, refuses to touch a checkout it could damage,
never leaves new code running without a health check, and reports every
failure instead of logging it and moving on.
Git runs for real against a throwaway origin/device clone pair; systemd, sudo
and the health check service are faked.
"""
import json
import shutil
import subprocess
import sys
from datetime import datetime, timezone
from pathlib import Path
from unittest.mock import MagicMock, patch
import pytest
ROOT = Path(__file__).resolve().parent.parent
sys.path.insert(0, str(ROOT))
from web_interface import auto_update as au # noqa: E402
# Local time is pinned to UTC below, so 03:00 is inside the quiet hours.
NIGHT = datetime(2026, 9, 14, 3, 0, tzinfo=timezone.utc).timestamp()
NOON = datetime(2026, 9, 14, 12, 0, tzinfo=timezone.utc).timestamp()
ON = {'auto_update': {'enabled': True}}
OFF = {'auto_update': {'enabled': False}}
needs_git = pytest.mark.skipif(shutil.which('git') is None, reason='git not installed')
@pytest.fixture(autouse=True)
def local_is_utc(monkeypatch):
"""Pin 'local time' so quiet-hours checks don't depend on the host zone."""
monkeypatch.setattr(au, '_zone', lambda name: timezone.utc)
def git(cwd, *args):
result = subprocess.run(['git', '-c', 'user.name=t', '-c', 'user.email=t@example.com', *args],
cwd=str(cwd), capture_output=True, text=True)
assert result.returncode == 0, result.stderr
return result.stdout.strip()
class Repo:
"""An origin, a checkout that publishes to it, and the device's clone."""
def __init__(self, tmp):
self.seed = tmp / 'seed'
self.seed.mkdir()
git(self.seed, 'init', '-q', '-b', 'main')
(self.seed / 'app.py').write_text('v = 1\n')
git(self.seed, 'add', '.')
git(self.seed, 'commit', '-qm', 'one')
self.origin = tmp / 'origin.git'
git(tmp, 'clone', '-q', '--bare', str(self.seed), str(self.origin))
git(self.seed, 'remote', 'add', 'origin', str(self.origin))
self.device = tmp / 'device'
git(tmp, 'clone', '-q', str(self.origin), str(self.device))
def head(self):
return git(self.device, 'rev-parse', 'HEAD')
def publish(self, text='v = 2\n'):
(self.seed / 'app.py').write_text(text)
git(self.seed, 'commit', '-qam', 'next')
git(self.seed, 'push', '-q', 'origin', 'main')
return git(self.seed, 'rev-parse', 'HEAD')
def real_pull(device, **extra):
def core_update():
before = git(device, 'rev-parse', 'HEAD')
r = subprocess.run(['git', 'pull', '-q', '--rebase', '--autostash'],
cwd=str(device), capture_output=True, text=True)
after = git(device, 'rev-parse', 'HEAD')
result = {'status': 'success' if r.returncode == 0 else 'error',
'message': 'Code updated successfully.' if r.returncode == 0 else r.stderr,
'restart_required': before != after, 'dependency_failures': []}
result.update(extra)
return result
return core_update
class FakeStore:
def __init__(self, plugins_dir, versions, bump=(), fail=()):
self.plugins_dir = str(plugins_dir)
self.bump, self.fail = set(bump), set(fail)
for pid, version in versions.items():
d = Path(plugins_dir) / pid
d.mkdir(parents=True)
(d / 'manifest.json').write_text(json.dumps({'id': pid, 'version': version}))
self.updated_calls = []
def list_installed_plugins(self):
return [p.name for p in Path(self.plugins_dir).iterdir()]
def _get_local_git_info(self, path):
return None
def update_plugin(self, pid):
self.updated_calls.append(pid)
if pid in self.fail:
return False
if pid in self.bump:
path = Path(self.plugins_dir) / pid / 'manifest.json'
m = json.loads(path.read_text())
m['version'] = '9.9.9'
path.write_text(json.dumps(m))
return True
class Harness:
"""An AutoUpdater on a real clone.
``helper`` is whether the health check's path unit is active; ``pickup``
whether the health check actually starts when asked. Starting it is
simulated the way systemd does it: the request file is consumed
(ExecStartPre) and the verifier marks the pending update "verifying".
"""
def __init__(self, tmp, repo, *, helper=True, pickup=True, core_update=None, store=None,
disk_free=10 ** 12, display_active=True, enabled=True, clock=NIGHT):
self.sudo, self.restarts, self.now = [], [], clock
self.state_at_handoff = None
def run(args, **kwargs):
if args[0] == 'sudo':
self.sudo.append(list(args))
return subprocess.CompletedProcess(args, 0, stdout='', stderr='')
return subprocess.run(args, **kwargs)
def sleep(seconds):
updater = self.updater
if self.state_at_handoff is None:
self.state_at_handoff = au.load_state(updater.state_file)
if pickup and updater.request_file.exists():
updater.request_file.unlink()
pending = au._read_json(updater.pending_file)
pending['status'] = 'verifying'
au._write_json(updater.pending_file, pending)
self.config = {'auto_update': {'enabled': enabled}, 'timezone': 'UTC'}
cm = MagicMock()
cm.load_config.return_value = self.config
self.updater = au.AutoUpdater(
config_manager=cm, core_update=core_update or real_pull(repo.device),
store_manager=store, project_root=repo.device, clock=lambda: self.now,
restart=self.restarts.append, run=run,
service_active=lambda unit: display_active, helper_ready=lambda: helper,
disk_free=lambda path: disk_free, sleep=sleep)
@property
def state(self):
return au.load_state(self.updater.state_file)
@property
def pending(self):
return au._read_json(self.updater.pending_file)
def write_pending(self, **fields):
au._write_json(self.updater.pending_file, fields)
def stub_updater(tmp_path, outcome='up_to_date', message='ok', store=None, enabled=True, clock=NIGHT):
"""For scheduling and plugin tests: the core update is stubbed out."""
cm = MagicMock()
cm.load_config.return_value = {'auto_update': {'enabled': enabled}, 'timezone': 'UTC'}
restarts = []
updater = au.AutoUpdater(config_manager=cm, core_update=MagicMock(), store_manager=store,
project_root=tmp_path, clock=lambda: clock,
restart=restarts.append)
updater.update_core = MagicMock(return_value={'outcome': outcome, 'message': message})
return updater, restarts
# -- scheduling ---------------------------------------------------------------
class TestIsDue:
def test_not_before_next_due(self):
assert not au.is_due(100, 200, 3)
def test_in_quiet_hours_once_due(self):
assert au.is_due(200, 200, 3)
def test_waits_for_quiet_hours(self):
assert not au.is_due(200, 100, 12)
def test_gives_up_waiting_after_grace(self):
assert au.is_due(100 + au.QUIET_HOURS_GRACE_SECONDS, 100, 12)
class TestTick:
def test_disabled_never_runs(self, tmp_path):
updater, _ = stub_updater(tmp_path, enabled=False)
assert updater.tick() is False
updater.update_core.assert_not_called()
def test_enabling_at_noon_waits_for_the_night(self, tmp_path):
updater, _ = stub_updater(tmp_path, clock=NOON)
assert updater.tick() is False
updater.update_core.assert_not_called()
assert au.load_state(updater.state_file)['next_due'] == NOON
def test_runs_when_due_and_schedules_a_week_out(self, tmp_path):
updater, _ = stub_updater(tmp_path)
assert updater.tick() is True
state = au.load_state(updater.state_file)
assert state['next_due'] == NIGHT + au.UPDATE_INTERVAL_SECONDS
assert updater.tick() is False, "ran twice in one night"
def test_transient_error_retries_next_day(self, tmp_path):
updater, _ = stub_updater(tmp_path, outcome='error', message='no network')
updater.tick()
state = au.load_state(updater.state_file)
assert state['next_due'] == NIGHT + au.RETRY_AFTER_FAILURE_SECONDS
assert state['alert']['message'] == 'no network'
def test_blocked_keeps_weekly_cadence_but_alerts(self, tmp_path):
updater, _ = stub_updater(tmp_path, outcome='blocked', message='local edits')
updater.tick()
state = au.load_state(updater.state_file)
assert state['next_due'] == NIGHT + au.UPDATE_INTERVAL_SECONDS
assert 'local edits' in state['alert']['message']
# -- checks before touching the checkout ---------------------------------------
@needs_git
class TestPreflightRefuses:
def test_nothing_new_is_up_to_date(self, tmp_path):
repo = Repo(tmp_path)
h = Harness(tmp_path, repo)
result = h.updater.run()
assert result['core_outcome'] == 'up_to_date'
assert result['status'] == 'success'
assert h.sudo == [] and 'alert' not in h.state
def test_without_the_health_check_code_is_not_touched(self, tmp_path):
repo = Repo(tmp_path)
old = repo.head()
repo.publish()
h = Harness(tmp_path, repo, helper=False)
result = h.updater.run()
assert result['core_outcome'] == 'blocked'
assert repo.head() == old
assert 'health check is set up' in result['core_message']
assert h.state['alert']
def test_local_edits_are_never_stashed(self, tmp_path):
repo = Repo(tmp_path)
old = repo.head()
repo.publish()
(repo.device / 'app.py').write_text('mine\n')
h = Harness(tmp_path, repo)
result = h.updater.run()
assert result['core_outcome'] == 'blocked'
assert 'app.py' in result['core_message']
assert repo.head() == old
assert (repo.device / 'app.py').read_text() == 'mine\n'
assert git(repo.device, 'stash', 'list') == ''
def test_local_commits_block(self, tmp_path):
repo = Repo(tmp_path)
repo.publish()
(repo.device / 'extra.txt').write_text('x\n')
git(repo.device, 'add', 'extra.txt')
git(repo.device, 'commit', '-qm', 'local')
mine = repo.head()
h = Harness(tmp_path, repo)
result = h.updater.run()
assert result['core_outcome'] == 'blocked'
assert 'local commit' in result['core_message']
assert repo.head() == mine
def test_a_rebase_really_in_progress_blocks(self, tmp_path):
repo = Repo(tmp_path)
repo.publish('v = 2\n')
(repo.device / 'app.py').write_text('v = mine\n')
git(repo.device, 'commit', '-qam', 'local')
git(repo.device, 'fetch', '-q')
stopped = subprocess.run(['git', '-c', 'user.name=t', '-c', 'user.email=t@example.com',
'rebase', 'origin/main'], cwd=str(repo.device), capture_output=True, text=True)
assert stopped.returncode != 0, "the rebase should stop on the conflict"
result = Harness(tmp_path, repo).updater.run()
assert result['core_outcome'] == 'blocked'
assert 'rebase is in progress' in result['core_message']
assert (repo.device / '.git' / 'rebase-merge').exists(), "a live rebase must be left alone"
def test_an_abandoned_rebase_is_cleared_and_the_update_runs(self, tmp_path):
"""Found on a real device: a pull stopped mid-rebase a week earlier,
HEAD was later checked out to a branch, and the leftover rebase
directory would have blocked every automatic update forever."""
repo = Repo(tmp_path)
leftover = repo.device / '.git' / 'rebase-merge'
leftover.mkdir()
(leftover / 'head-name').write_text('refs/heads/main\n')
new = repo.publish()
result = Harness(tmp_path, repo).updater.run()
assert not leftover.exists()
assert result['core_outcome'] == 'verifying'
assert repo.head() == new
def test_a_merge_in_progress_blocks(self, tmp_path):
repo = Repo(tmp_path)
repo.publish()
(repo.device / '.git' / 'MERGE_HEAD').write_text(repo.head() + '\n')
result = Harness(tmp_path, repo).updater.run()
assert result['core_outcome'] == 'blocked'
assert 'merge is in progress' in result['core_message']
def test_low_disk_blocks(self, tmp_path):
repo = Repo(tmp_path)
repo.publish()
result = Harness(tmp_path, repo, disk_free=10 * 1024 * 1024).updater.run()
assert result['core_outcome'] == 'blocked'
assert 'disk space' in result['core_message']
def test_unreachable_origin_retries_tomorrow(self, tmp_path):
repo = Repo(tmp_path)
git(repo.device, 'remote', 'set-url', 'origin', str(tmp_path / 'nowhere'))
h = Harness(tmp_path, repo)
result = h.updater.run()
assert result['core_outcome'] == 'error'
assert h.state['next_due'] == NIGHT + au.RETRY_AFTER_FAILURE_SECONDS
def test_version_already_rolled_back_is_not_retried(self, tmp_path):
repo = Repo(tmp_path)
old = repo.head()
bad = repo.publish()
h = Harness(tmp_path, repo)
au.save_state({'rolled_back_head': bad}, h.updater.state_file)
result = h.updater.run()
assert result['core_outcome'] == 'up_to_date'
assert 'rolled back before' in result['core_message']
assert repo.head() == old and h.sudo == []
# -- the update and its hand-off to the health check ---------------------------
@needs_git
class TestUpdateIsVerified:
def test_pull_hands_off_to_the_health_check(self, tmp_path):
repo = Repo(tmp_path)
old = repo.head()
new = repo.publish()
store = FakeStore(tmp_path / 'plugins', {'weather': '1.0.0'}, bump={'weather'})
h = Harness(tmp_path, repo, store=store)
result = h.updater.run()
assert result['core_outcome'] == 'verifying' and result['status'] == 'pending'
assert repo.head() == new
assert h.pending == {**h.pending, 'status': 'verifying', 'old_head': old, 'new_head': new,
'display_was_active': True, 'dependency_failures': []}
assert not h.updater.request_file.exists(), "the request is consumed when the check starts"
assert h.sudo == [], "triggering the health check needs no privilege"
assert h.restarts == [], "restarts belong to the health check, not the web process"
assert store.updated_calls == [], "plugins must wait until the new code is verified"
assert h.state['plugins_pending'] is True
assert h.updater.verifier_copy.read_text() == au.VERIFIER_SOURCE.read_text()
def test_state_is_saved_before_the_health_check_restarts_this_process(self, tmp_path):
repo = Repo(tmp_path)
repo.publish()
h = Harness(tmp_path, repo)
h.updater.run()
assert h.state_at_handoff['last_result']['core_outcome'] == 'verifying'
assert h.state_at_handoff['plugins_pending'] is True
def test_dependency_failures_reach_the_health_check(self, tmp_path):
repo = Repo(tmp_path)
repo.publish()
h = Harness(tmp_path, repo,
core_update=real_pull(repo.device, dependency_failures=['requirements.txt']))
h.updater.run()
assert h.pending['dependency_failures'] == ['requirements.txt']
def test_a_health_check_that_never_starts_means_the_update_is_undone(self, tmp_path):
repo = Repo(tmp_path)
old = repo.head()
repo.publish()
h = Harness(tmp_path, repo, pickup=False)
result = h.updater.run()
assert repo.head() == old
assert result['core_outcome'] == 'blocked'
assert 'did not start' in result['core_message']
assert h.pending is None and not h.updater.request_file.exists()
assert h.state['alert']
def test_failed_pull_retries_tomorrow(self, tmp_path):
repo = Repo(tmp_path)
old = repo.head()
repo.publish()
h = Harness(tmp_path, repo,
core_update=lambda: {'status': 'error', 'message': 'Update failed: network'})
result = h.updater.run()
assert result['core_outcome'] == 'error'
assert repo.head() == old
assert h.state['next_due'] == NIGHT + au.RETRY_AFTER_FAILURE_SECONDS
def test_failed_pull_that_moved_head_is_rolled_back(self, tmp_path):
repo = Repo(tmp_path)
old = repo.head()
repo.publish()
pull = real_pull(repo.device)
def half_failed():
pull()
return {'status': 'error', 'message': 'Update failed: interrupted'}
result = Harness(tmp_path, repo, core_update=half_failed).updater.run()
assert repo.head() == old
assert 'rolled back' in result['core_message']
# -- reporting the health check's outcome --------------------------------------
@needs_git
class TestHealthCheckOutcome:
def _after_update(self, tmp_path, **pending):
repo = Repo(tmp_path)
store = FakeStore(tmp_path / 'plugins', {'weather': '1.0.0'}, bump={'weather'})
h = Harness(tmp_path, repo, store=store)
au.save_state({'plugins_pending': True, 'next_due': NIGHT + au.UPDATE_INTERVAL_SECONDS,
'last_result': {'core_outcome': 'verifying', 'status': 'pending',
'plugins_deferred': True}}, h.updater.state_file)
h.write_pending(old_head='a' * 40, new_head='b' * 40, created_at=NIGHT, **pending)
return h, store
def test_waits_while_the_check_runs(self, tmp_path):
h, store = self._after_update(tmp_path, status='verifying')
h.now = NIGHT + 60
assert h.updater.tick() is False
assert store.updated_calls == [] and h.pending
def test_success_then_runs_the_deferred_plugins(self, tmp_path):
h, store = self._after_update(tmp_path, status='success')
assert h.updater.tick() is True
result = h.state['last_result']
assert result['core_outcome'] == 'updated' and result['status'] == 'success'
assert result['plugins_updated'] == ['weather']
assert h.restarts == ['ledmatrix']
assert 'alert' not in h.state and h.pending is None
def test_rollback_alerts_and_remembers_the_bad_commit(self, tmp_path):
h, store = self._after_update(tmp_path, status='rolled_back',
reason='the web interface did not respond')
h.updater.tick()
assert 'rolled back' in h.state['alert']['message']
assert 'the web interface did not respond' in h.state['alert']['message']
assert h.state['rolled_back_head'] == 'b' * 40
assert store.updated_calls == ['weather'], "the old code is healthy; plugins may update"
def test_failed_rollback_alerts_and_skips_plugins(self, tmp_path):
h, store = self._after_update(tmp_path, status='rollback_failed',
reason='display down', detail='reset failed')
h.updater.tick()
assert f'git reset --hard {"a" * 40}' in h.state['alert']['message']
assert store.updated_calls == []
assert h.state['plugins_pending'] is False
def test_a_check_that_never_reports_back_alerts(self, tmp_path):
h, _ = self._after_update(tmp_path, status='verifying')
h.now = NIGHT + au.VERIFY_LOST_SECONDS + 1
h.updater.tick()
assert h.state['last_result']['core_outcome'] == 'lost'
assert 'never reported back' in h.state['alert']['message']
def test_dismissed_alert_stays_hidden_until_a_new_one(self, tmp_path):
h, _ = self._after_update(tmp_path, status='rolled_back', reason='x')
h.updater.tick()
alert_id = h.state['alert']['id']
def status():
return au.describe_status(h.config, state_file=h.updater.state_file,
pending_file=h.updater.pending_file,
setup_file=tmp_path / 'no-setup.json', helper=lambda: True)
assert status()['alert_id'] == alert_id
au.dismiss_alert(alert_id, h.updater.state_file)
assert status()['alert'] is None
state = h.state
state['alert'] = {'id': 'newer', 'message': 'again'}
au.save_state(state, h.updater.state_file)
assert status()['alert'] == 'again'
def test_describe_status_reports_setup(tmp_path):
setup = tmp_path / 'setup.json'
setup.write_text(json.dumps({'status': 'failed', 'message': 'not root'}))
kwargs = dict(state={}, state_file=tmp_path / 's.json', pending_file=tmp_path / 'p.json',
setup_file=setup)
on = au.describe_status(ON, helper=lambda: False, **kwargs)
assert on['verifier_installed'] is False
assert (on['setup_status'], on['setup_message']) == ('failed', 'not root')
def never(): raise AssertionError("systemctl asked while updates are off")
assert au.describe_status(OFF, helper=never, **kwargs)['verifier_installed'] is None
# -- setting it up from the web UI ----------------------------------------------
class TestSetupFromTheWebUI:
def _host(self, monkeypatch, ready=False, active=True, restart_ok=True):
restarts = []
monkeypatch.setattr(au, 'helper_ready', lambda: ready)
monkeypatch.setattr(au, '_service_active', lambda unit: active)
monkeypatch.setattr(au, 'restart_service', lambda unit: restarts.append(unit) or restart_ok)
return restarts
def test_switching_on_restarts_the_display_to_finish_setup(self, monkeypatch):
restarts = self._host(monkeypatch)
note = au.start_setup_if_needed(False, ON)
assert restarts == ['ledmatrix']
assert 'display is restarting' in note
@pytest.mark.parametrize('was_enabled, config, ready', [
(True, ON, False), # already on: an unrelated save must not restart the display
(False, OFF, False), # still off
(False, ON, True), # already set up
])
def test_nothing_to_do(self, monkeypatch, was_enabled, config, ready):
restarts = self._host(monkeypatch, ready=ready)
assert au.start_setup_if_needed(was_enabled, config) is None
assert restarts == []
def test_a_stopped_display_is_not_started(self, monkeypatch):
restarts = self._host(monkeypatch, active=False)
assert 'next time the display service starts' in au.start_setup_if_needed(False, ON)
assert restarts == []
def test_a_failed_restart_says_so(self, monkeypatch):
self._host(monkeypatch, restart_ok=False)
assert 'Could not restart' in au.start_setup_if_needed(False, ON)
# -- plugins --------------------------------------------------------------------
class TestPlugins:
def test_nothing_changed_restarts_nothing(self, tmp_path):
store = FakeStore(tmp_path / 'plugins', {'clock': '1.0.0'})
updater, restarts = stub_updater(tmp_path, store=store)
updater.run()
assert store.updated_calls == ['clock']
assert restarts == []
def test_plugin_update_restarts_display_only(self, tmp_path):
store = FakeStore(tmp_path / 'plugins', {'clock': '1.0.0', 'weather': '1.0.0'},
bump={'weather'})
updater, restarts = stub_updater(tmp_path, store=store)
result = updater.run()
assert result['plugins_updated'] == ['weather']
assert restarts == ['ledmatrix']
def test_plugin_failure_alerts_but_keeps_weekly_cadence(self, tmp_path):
store = FakeStore(tmp_path / 'plugins', {'zip-only': '1.0.0'}, fail={'zip-only'})
updater, _ = stub_updater(tmp_path, store=store)
result = updater.run()
assert result['plugins_failed'] == ['zip-only'] and result['status'] == 'error'
state = au.load_state(updater.state_file)
assert 'zip-only' in state['alert']['message']
assert state['next_due'] == NIGHT + au.UPDATE_INTERVAL_SECONDS
def test_local_only_plugins_are_left_alone(self, tmp_path):
store = FakeStore(tmp_path / 'plugins', {'mine': '1.0.0'})
path = tmp_path / 'plugins' / 'mine' / 'manifest.json'
path.write_text(json.dumps({'id': 'mine', 'version': '1.0.0', 'local_only': True}))
updater, _ = stub_updater(tmp_path, store=store)
updater.run()
assert store.updated_calls == []
def test_restart_service_skips_a_stopped_unit(monkeypatch):
calls = []
def run(args, **kwargs):
calls.append(args)
return MagicMock(stdout='inactive\n', returncode=3, stderr='')
monkeypatch.setattr(au.subprocess, 'run', run)
assert au.restart_service('ledmatrix') is False
assert calls == [['systemctl', 'is-active', 'ledmatrix']], (
"a display the user stopped must not be started by an update")
def test_core_update_names_the_requirement_files_that_failed():
"""The health check refuses code whose dependencies did not install, so
the failure has to arrive as data, not only as a sentence in the message."""
from web_interface.blueprints import api_v3 as pkg
from web_interface.blueprints.api_v3 import system
heads = iter(['aaa111\n', 'bbb222\n'])
def run(args, **kwargs):
if args[:2] == ['git', 'rev-parse'] and args[-1] == 'HEAD':
out = next(heads, 'bbb222\n')
elif args[:2] == ['git', 'diff']:
out = 'requirements.txt\n'
elif '@{u}' in args:
out = 'origin/main\n'
else:
out = ''
return subprocess.CompletedProcess(args, 0, stdout=out, stderr='')
pkg.api_v3.plugin_store_manager = None
failed_install = subprocess.CompletedProcess([], 1, stdout='', stderr='boom')
with patch.object(pkg.subprocess, 'run', run), \
patch.object(system, '_pip_install_requirements', return_value=failed_install):
result = system.perform_core_update()
assert result['status'] == 'success'
assert result['dependency_failures'] == ['requirements.txt']
# -- web routes -------------------------------------------------------------------
@pytest.fixture
def api_client(monkeypatch):
from flask import Flask
from web_interface.blueprints.api_v3 import api_v3
app = Flask(__name__)
app.register_blueprint(api_v3, url_prefix='/api/v3')
cm = MagicMock()
cm.load_config.return_value = {'timezone': 'UTC', 'auto_update': {'enabled': True}}
cm.get_raw_file_content.return_value = {}
cm.save_config_atomic.return_value = MagicMock(status=MagicMock(value='success'), message=None)
api_v3.config_manager = cm
api_v3.plugin_manager = MagicMock(plugins={})
# Never restart a real display from a test run.
setup_calls = []
monkeypatch.setattr(au, 'start_setup_if_needed',
lambda was_enabled, config: setup_calls.append(was_enabled) or None)
return app.test_client(), cm, setup_calls
class TestStatusRoutes:
def test_status_carries_the_alert(self, api_client, monkeypatch):
client, _, _ = api_client
monkeypatch.setattr(au, 'describe_status', lambda config: {'alert': 'rolled back', 'alert_id': '7'})
data = client.get('/api/v3/system/auto-update').get_json()['data']
assert data == {'alert': 'rolled back', 'alert_id': '7'}
def test_dismiss_needs_an_id(self, api_client):
client, _, _ = api_client
assert client.post('/api/v3/system/auto-update/dismiss', json={}).status_code == 400
def test_dismiss(self, api_client, monkeypatch):
client, _, _ = api_client
calls = []
monkeypatch.setattr(au, 'dismiss_alert', calls.append)
assert client.post('/api/v3/system/auto-update/dismiss', json={'alert_id': '7'}).status_code == 200
assert calls == ['7']
class TestSettingsSave:
def _saved(self, cm):
return cm.save_config_atomic.call_args[0][0]
def test_checked_toggle_saves_enabled(self, api_client):
client, cm, setup_calls = api_client
cm.load_config.return_value = {'timezone': 'UTC'}
resp = client.post('/api/v3/config/main', json={'timezone': 'UTC', 'auto_update_enabled': 'true'})
assert resp.status_code == 200
saved = self._saved(cm)
assert saved['auto_update'] == {'enabled': True}
assert 'auto_update_enabled' not in saved, "the form field must not leak into config.json"
assert setup_calls == [False], "setup is told the toggle was previously off"
def test_unchecked_toggle_on_general_save_disables(self, api_client):
client, cm, setup_calls = api_client
resp = client.post('/api/v3/config/main', json={'timezone': 'UTC'})
assert resp.status_code == 200
assert self._saved(cm)['auto_update'] == {'enabled': False}
assert setup_calls == [True]
def test_setup_note_reaches_the_user(self, api_client, monkeypatch):
client, cm, _ = api_client
cm.load_config.return_value = {'timezone': 'UTC'}
monkeypatch.setattr(au, 'start_setup_if_needed',
lambda was_enabled, config: 'Finishing automatic update setup: the display is restarting.')
body = client.post('/api/v3/config/main',
json={'timezone': 'UTC', 'auto_update_enabled': 'true'}).get_json()
assert 'the display is restarting' in body['message']
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"""Installing the automatic-update health check from the display service.
src/auto_update_setup.py is how a user who never opens a terminal gets updates
with a safety net: it runs as root inside the display service and writes
systemd units. So it has to install exactly the right thing when asked, do
nothing when not asked, refuse templates that would run as anyone but the web
user, and say why whenever it could not finish.
"""
import json
import shutil
import subprocess
import sys
from pathlib import Path
import pytest
ROOT = Path(__file__).resolve().parent.parent
sys.path.insert(0, str(ROOT))
from src import auto_update_setup as aus # noqa: E402
ON = {'auto_update': {'enabled': True}}
class FakeSystemctl:
def __init__(self, fail=(), activates=True):
self.calls = []
self.fail = set(fail)
self.activates = activates
self.active = False
def __call__(self, args, **kwargs):
assert args[0] == 'systemctl', args
self.calls.append(args[1:])
verb = args[1]
if verb == 'is-active':
return subprocess.CompletedProcess(args, 0 if self.active else 3,
stdout='active\n' if self.active else 'inactive\n', stderr='')
if verb in self.fail:
return subprocess.CompletedProcess(args, 1, stdout='', stderr=f'{verb} refused')
if verb in ('restart', 'enable') and self.activates and (verb == 'restart' or '--now' in args):
self.active = True
return subprocess.CompletedProcess(args, 0, stdout='', stderr='')
def project(tmp_path, user='hdpi', workdir=None):
root = tmp_path / 'LEDMatrix'
(root / 'systemd').mkdir(parents=True)
for name in aus.UNITS:
shutil.copy(ROOT / 'systemd' / name, root / 'systemd' / name)
etc = tmp_path / 'etc'
etc.mkdir()
(etc / aus.WEB_UNIT).write_text(
f'[Service]\nUser={user}\nWorkingDirectory={workdir or root}\n', encoding='utf-8')
return root, etc
def setup(root, etc, systemctl, root_user=True):
return aus.UpdateHelperSetup(project_root=root, systemd_dir=etc, run=systemctl,
is_root=lambda: root_user,
lookup_ids=lambda user: None if user == 'ghost' else (1000, 1000),
clock=lambda: 1234.0)
def result(root):
return json.loads((root / aus.RESULT_REL).read_text())
def test_does_nothing_while_updates_are_off(tmp_path):
root, etc = project(tmp_path)
systemctl = FakeSystemctl()
assert setup(root, etc, systemctl).ensure({'auto_update': {'enabled': False}}) is None
assert systemctl.calls == []
assert not (etc / aus.SERVICE_UNIT).exists()
assert not (root / aus.RESULT_REL).exists()
def test_installs_both_units_for_the_web_user(tmp_path):
root, etc = project(tmp_path)
systemctl = FakeSystemctl()
out = setup(root, etc, systemctl).ensure(ON)
assert out['status'] == 'installed' and result(root)['status'] == 'installed'
service = (etc / aus.SERVICE_UNIT).read_text()
assert 'User=hdpi' in service
assert f'ExecStart=/usr/bin/python3 {root}/data/auto_update_verifier.py {root}' in service
assert f'PathExists={root}/data/auto_update_verify.request' in (etc / aus.PATH_UNIT).read_text()
assert '__' not in service
assert ['daemon-reload'] in systemctl.calls
assert ['enable', aus.PATH_UNIT] in systemctl.calls
assert systemctl.active
def test_second_start_changes_nothing(tmp_path):
root, etc = project(tmp_path)
systemctl = FakeSystemctl()
setup(root, etc, systemctl).ensure(ON)
first = result(root)
systemctl.calls.clear()
setup(root, etc, systemctl).ensure(ON)
assert systemctl.calls == [['is-active', aus.PATH_UNIT], ['is-active', aus.PATH_UNIT]]
assert result(root) == first, "an unchanged setup must not rewrite its result every boot"
def test_a_changed_template_is_reinstalled(tmp_path):
root, etc = project(tmp_path)
systemctl = FakeSystemctl()
setup(root, etc, systemctl).ensure(ON)
template = root / 'systemd' / aus.SERVICE_UNIT
template.write_text(template.read_text() + '\n# newer\n')
systemctl.calls.clear()
assert setup(root, etc, systemctl).ensure(ON)['message'] == 'Installed the update health check.'
assert (etc / aus.SERVICE_UNIT).read_text().endswith('# newer\n')
assert ['daemon-reload'] in systemctl.calls
def test_a_template_that_would_not_run_as_the_web_user_is_refused(tmp_path):
root, etc = project(tmp_path)
template = root / 'systemd' / aus.SERVICE_UNIT
template.write_text(template.read_text().replace('User=__USER__', 'User=root'))
systemctl = FakeSystemctl()
out = setup(root, etc, systemctl).ensure(ON)
assert out['status'] == 'failed' and 'refusing' in out['message']
assert not (etc / aus.SERVICE_UNIT).exists()
assert systemctl.calls == []
def test_a_path_unit_that_starts_something_else_is_refused(tmp_path):
root, etc = project(tmp_path)
template = root / 'systemd' / aus.PATH_UNIT
template.write_text(template.read_text().replace('Unit=ledmatrix-update-verify.service', 'Unit=other.service'))
out = setup(root, etc, FakeSystemctl()).ensure(ON)
assert out['status'] == 'failed' and not (etc / aus.PATH_UNIT).exists()
@pytest.mark.parametrize('case, expected', [
('not_root', 'not running as root'),
('no_web_unit', 'not installed'),
('other_folder', 'runs from'),
('bad_user', 'not a usable account'),
])
def test_reports_why_it_could_not_install(tmp_path, case, expected):
root, etc = project(tmp_path, user='ghost' if case == 'bad_user' else 'hdpi',
workdir=tmp_path / 'elsewhere' if case == 'other_folder' else None)
if case == 'no_web_unit':
(etc / aus.WEB_UNIT).unlink()
out = setup(root, etc, FakeSystemctl(), root_user=case != 'not_root').ensure(ON)
assert out['status'] == 'failed' and expected in out['message']
assert result(root)['message'] == out['message']
assert not (etc / aus.SERVICE_UNIT).exists()
def test_a_path_unit_that_will_not_start_is_a_failure(tmp_path):
root, etc = project(tmp_path)
out = setup(root, etc, FakeSystemctl(activates=False)).ensure(ON)
assert out['status'] == 'failed' and 'did not start' in out['message']
def test_systemctl_errors_are_reported(tmp_path):
root, etc = project(tmp_path)
out = setup(root, etc, FakeSystemctl(fail={'daemon-reload'})).ensure(ON)
assert out['status'] == 'failed' and 'daemon-reload refused' in out['message']
def test_not_a_systemd_host_is_left_alone(tmp_path):
root, _ = project(tmp_path)
systemctl = FakeSystemctl()
assert setup(root, tmp_path / 'no-etc', systemctl).ensure(ON) is None
assert systemctl.calls == []
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"""The automatic update's health check and rollback (scripts/utils/auto_update_verify.py).
This is what stands between an unattended update and a device that no longer
works, so each way an update can fail is exercised against a real git repo:
the new commit is checked out, the services are "restarted", and whether they
come up healthy depends on which commit they were restarted onto. Only
systemd, sudo and the HTTP check are faked.
"""
import importlib.util
import re
import shutil
import subprocess
import sys
from pathlib import Path
import pytest
ROOT = Path(__file__).resolve().parent.parent
sys.path.insert(0, str(ROOT))
_spec = importlib.util.spec_from_file_location(
'auto_update_verify', ROOT / 'scripts' / 'utils' / 'auto_update_verify.py')
av = importlib.util.module_from_spec(_spec)
_spec.loader.exec_module(av)
pytestmark = pytest.mark.skipif(shutil.which('git') is None, reason='git not installed')
def git(cwd, *args):
result = subprocess.run(['git', '-c', 'user.name=t', '-c', 'user.email=t@example.com', *args],
cwd=str(cwd), capture_output=True, text=True)
assert result.returncode == 0, result.stderr
return result.stdout.strip()
def done(args, stdout='', rc=0):
return subprocess.CompletedProcess(args, rc, stdout=stdout, stderr='' if rc == 0 else 'failed')
def updated_repo(tmp_path, new_requirements=False):
"""A checkout on a new commit, with the commit it came from."""
repo = tmp_path / 'LEDMatrix'
repo.mkdir()
git(repo, 'init', '-q', '-b', 'main')
(repo / 'app.py').write_text('v = 1\n')
(repo / 'requirements.txt').write_text('requests\n')
git(repo, 'add', '.')
git(repo, 'commit', '-qm', 'old')
old = git(repo, 'rev-parse', 'HEAD')
(repo / 'app.py').write_text('v = 2\n')
if new_requirements:
(repo / 'requirements.txt').write_text('requests\nnewthing\n')
git(repo, 'commit', '-qam', 'new')
return repo, old, git(repo, 'rev-parse', 'HEAD')
class FakeHost:
"""systemd, sudo and the web interface.
Services run whatever commit was checked out when they were last
restarted; ``failure`` says how they misbehave on the new commit
("display_down", "web_down", "crash_loop") or on any commit ("always").
"""
def __init__(self, repo, bad_head, failure=None, pip_ok=True):
self.repo, self.bad_head, self.failure, self.pip_ok = repo, bad_head, failure, pip_ok
self.running_head = None # not restarted yet: still the old, healthy code
self.restarts = [] # (unit, commit it was restarted onto)
self.pip_installs = []
self.now = 0.0
self.nrestarts = 0
def broken(self, kind):
if self.running_head is None:
return False
return self.failure == 'always' or (self.running_head == self.bad_head and self.failure == kind)
def run(self, args, **kwargs):
if args[0] == 'git':
return subprocess.run(args, **kwargs)
if args[:2] == ['systemctl', 'is-active']:
return done(args, 'failed\n' if self.broken('display_down') else 'active\n')
if args[:2] == ['systemctl', 'show']:
if self.broken('crash_loop'):
self.nrestarts += 1
return done(args, f'{self.nrestarts}\n')
if args[0] == 'sudo' and any(a.endswith('safe_pip_install.sh') for a in args):
self.pip_installs.append(args[-1])
return done(args, rc=0 if self.pip_ok else 1)
if args[:4] == ['sudo', '-n', 'systemctl', 'restart']:
self.running_head = git(self.repo, 'rev-parse', 'HEAD')
self.restarts.append((args[4], self.running_head))
return done(args)
raise AssertionError(f'unexpected command: {args}')
def web_responds(self):
return not self.broken('web_down')
def sleep(self, seconds):
self.now += seconds
def verifier(self):
return av.Verifier(self.repo, run=self.run, sleep=self.sleep, clock=lambda: self.now,
web_responds=self.web_responds, log=lambda msg: None)
def check(tmp_path, failure=None, new_requirements=False, pip_ok=True, **pending):
repo, old, new = updated_repo(tmp_path, new_requirements)
fields = {'status': 'pending', 'old_head': old, 'new_head': new,
'display_was_active': True, 'dependency_failures': []}
fields.update(pending)
av.write_pending(av.pending_path(repo), fields)
host = FakeHost(repo, new, failure, pip_ok)
code = host.verifier().verify()
result = av.read_pending(av.pending_path(repo))
return code, result, host, git(repo, 'rev-parse', 'HEAD'), old, new
def test_a_healthy_update_is_kept(tmp_path):
code, result, host, head, old, new = check(tmp_path)
assert code == 0 and result['status'] == 'success'
assert head == new
assert host.restarts == [('ledmatrix.service', new), ('ledmatrix-web.service', new)]
@pytest.mark.parametrize('failure, reason', [
('display_down', 'the display service did not stay running'),
('web_down', 'the web interface did not respond'),
('crash_loop', 'the display service kept restarting'),
])
def test_an_unhealthy_update_is_rolled_back(tmp_path, failure, reason):
code, result, host, head, old, new = check(tmp_path, failure)
assert code == 0
assert result['status'] == 'rolled_back' and result['reason'] == reason
assert head == old
assert host.restarts[-2:] == [('ledmatrix.service', old), ('ledmatrix-web.service', old)]
def test_a_stopped_display_is_not_started(tmp_path):
code, result, host, head, old, new = check(tmp_path, display_was_active=False)
assert result['status'] == 'success'
assert [unit for unit, _ in host.restarts] == ['ledmatrix-web.service']
def test_failed_dependencies_roll_back_before_anything_restarts_onto_them(tmp_path):
code, result, host, head, old, new = check(tmp_path, dependency_failures=['requirements.txt'])
assert result['status'] == 'rolled_back'
assert 'requirements.txt' in result['reason']
assert head == old
assert all(commit == old for _, commit in host.restarts), host.restarts
def test_rollback_reinstalls_the_previous_dependencies(tmp_path):
code, result, host, head, old, new = check(tmp_path, 'display_down', new_requirements=True)
assert result['status'] == 'rolled_back' and result['detail'] is None
assert host.pip_installs == [str(tmp_path / 'LEDMatrix' / 'requirements.txt')]
def test_a_failed_dependency_reinstall_is_reported(tmp_path):
code, result, host, head, old, new = check(tmp_path, 'display_down', new_requirements=True,
pip_ok=False)
assert result['status'] == 'rolled_back' and head == old
assert 'Install Base Requirements' in result['detail']
def test_still_broken_after_rolling_back_is_rollback_failed(tmp_path):
code, result, host, head, old, new = check(tmp_path, 'always')
assert code == 1 and result['status'] == 'rollback_failed'
assert 'still unhealthy after rolling back' in result['detail']
def test_nothing_pending_does_nothing(tmp_path):
repo, _, _ = updated_repo(tmp_path)
host = FakeHost(repo, None)
assert host.verifier().verify() == 0
assert host.restarts == []
def test_a_crash_is_recorded_not_left_as_running(tmp_path, monkeypatch):
repo, old, new = updated_repo(tmp_path)
av.write_pending(av.pending_path(repo), {'status': 'pending', 'old_head': old, 'new_head': new})
def boom(self):
raise RuntimeError('boom')
monkeypatch.setattr(av.Verifier, 'verify', boom)
assert av.main(['auto_update_verify.py', str(repo)]) == 1
result = av.read_pending(av.pending_path(repo))
assert result['status'] == 'rollback_failed' and result['detail'] == 'boom'
def test_units_installers_and_updater_agree():
"""The request file, the copied verifier, the unit names and the places
that install them must all line up, or the health check silently never
starts on real devices -- and code updates stay paused."""
from web_interface import auto_update as au
from src import auto_update_setup as aus
from src.startup_validator import StartupValidator
service = (ROOT / 'systemd' / aus.SERVICE_UNIT).read_text(encoding='utf-8')
path = (ROOT / 'systemd' / aus.PATH_UNIT).read_text(encoding='utf-8')
request = f'__PROJECT_ROOT_DIR__/{au.REQUEST_REL.as_posix()}'
assert f'PathExists={request}' in path
assert f'Unit={aus.SERVICE_UNIT}' in path
assert f'ExecStartPre=/bin/rm -f {request}' in service, "the request must be consumed or the path unit re-fires"
assert f'__PROJECT_ROOT_DIR__/{au.VERIFIER_COPY_REL.as_posix()} __PROJECT_ROOT_DIR__' in service
assert au.PENDING_REL.name == av.PENDING_NAME
assert au.PATH_UNIT == aus.PATH_UNIT and au.SETUP_RESULT_REL == aus.RESULT_REL
for installer in ('scripts/install/install_web_service.sh', 'scripts/install/install_service.sh'):
text = (ROOT / installer).read_text(encoding='utf-8')
assert 'ledmatrix-update-verify.service ledmatrix-update-verify.path' in text, installer
assert 'enable --now ledmatrix-update-verify.path' in text, installer
for unit in aus.UNITS:
assert (f'systemd/{unit}', f'/etc/systemd/system/{unit}') in StartupValidator._UNITS
# Triggering takes no privilege any more; no sudoers rule should linger.
for sudoers in ('scripts/install/configure_web_sudo.sh', 'first_time_install.sh'):
assert not re.search(r'NOPASSWD:.*update-verify', (ROOT / sudoers).read_text(encoding='utf-8')), sudoers