Files
LEDMatrix/web_interface/blueprints/api_v3/system.py
T
ChuckandClaude Opus 5.5 fa51ebab5f fix(update): clear a stale .git/index.lock before Update Code (#801)
* fix(update): clear a stale .git/index.lock before Update Code

A git that subprocess.run's timeout kills (SIGKILL) cannot remove
.git/index.lock, so every later update failed with "Unable to create
.../.git/index.lock: File exists" until the file was removed by hand.

Update Code and the automatic update's rollback now remove the lock when
no git process is running in the checkout and the file is more than a
few seconds old. While another git is running, Update Code says so
instead of failing; when the lock could not be checked, the error names
the rm command that fixes it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SvFtgthKUNEPhJu6RuX9Sk

* fix(update): count a git that names the checkout in its arguments as running

git --git-dir/--work-tree can work on the checkout from any working
directory, so the cwd check alone could take such a git's live lock for
a stale one.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SvFtgthKUNEPhJu6RuX9Sk

* fix(update): resolve a git's relative path arguments against its cwd

`git -C LEDMatrix ...` or a relative --git-dir started outside the
checkout works on it too; resolve each argument against the process's
working directory before deciding a lock is stale, and count unreadable
arguments as naming the checkout.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SvFtgthKUNEPhJu6RuX9Sk

---------

Co-authored-by: Claude <noreply@anthropic.com>
2026-10-26 20:13:40 -04:00

890 lines
45 KiB
Python

"""Service control, updates, versions and system status.
Routes decorate the shared `api_v3` Blueprint from the package `__init__`,
so their endpoint names are unchanged by living here.
"""
from web_interface.blueprints.api_v3 import (
Any, Dict, PROJECT_ROOT, Path, _GIT, _UPDATE_CHECK_TTL,
_describe_git_failure, _get_display_service_status, _git_current_branch,
_git_remote_branch_exists, _git_upstream, _pip_install_requirements,
_scrub_git_remote_url, _truncate_output, _update_check_cache,
_update_check_failed, api_v3, checkout_branch, describe_exception,
get_git_version, jsonify, logger, os, request, resolve_pull_command,
shutil, subprocess,
)
import threading
from web_interface.cache import get_cached, set_cached
from web_interface.system_metrics import collect_system_metrics, format_uptime
import web_interface.blueprints.api_v3 as _pkg
# Read through the module rather than bound by value: tests patch these
# as module attributes, and a value binding would not see the patch.
# Several are also called from helpers that live in __init__, so the
# package is the only patch point that covers every caller.
@api_v3.route('/system/status', methods=['GET'])
def get_system_status():
"""CPU, memory, disk, temperature and uptime, plus the display service state.
``data`` carries every key of system_metrics.collect_system_metrics() --
the numbers the live status stream sends -- and ``timestamp``, ``uptime``
(formatted) and ``service_active``. A metric that cannot be read is null.
Cached for 10 seconds.
"""
cached_result = get_cached('system_status', ttl_seconds=10)
if cached_result is not None:
return jsonify({'status': 'success', 'data': cached_result})
# A short blocking sample: this may be the first cpu_percent call in the
# process, and a non-blocking first call has nothing to measure against.
status = collect_system_metrics(cpu_interval=0.1)
status['timestamp'] = _pkg.time.time()
status['uptime'] = format_uptime(status['uptime_seconds'])
status['service_active'] = _get_display_service_status().get('active', False)
set_cached('system_status', status, ttl_seconds=10)
return jsonify({'status': 'success', 'data': status})
@api_v3.route('/system/version', methods=['GET'])
def get_system_version():
"""Get LEDMatrix repository version"""
try:
version = get_git_version()
return jsonify({'status': 'success', 'data': {'version': version}})
except Exception as e:
logger.error("get_system_version failed: %s", e, exc_info=True)
return jsonify({'status': 'error', 'message': 'Unable to retrieve version'}), 500
@api_v3.route('/system/auto-update', methods=['GET'])
def get_auto_update_status():
"""Weekly automatic update status: last result, next check, and any alert.
No local except: a failure falls through to the app-wide handler in
web_interface/app.py, which logs the traceback and returns the redacted
detail -- the response every route gives, without a second copy here.
"""
from web_interface import auto_update
config = api_v3.config_manager.load_config() if api_v3.config_manager else {}
return jsonify({'status': 'success', 'data': auto_update.describe_status(config)})
@api_v3.route('/system/auto-update/dismiss', methods=['POST'])
def dismiss_auto_update_alert():
"""Hide the current automatic-update banner until a new alert replaces it."""
from web_interface import auto_update
payload = request.get_json(silent=True)
# A JSON array or scalar is a bad request, not a 500.
alert_id = str(payload.get('alert_id') or '').strip() if isinstance(payload, dict) else ''
if not alert_id:
return jsonify({'status': 'error', 'message': 'alert_id required'}), 400
auto_update.dismiss_alert(alert_id)
return jsonify({'status': 'success'})
def _channel_payload(channel, fetch_error=''):
from web_interface import update_channel
data = dict(channel)
data['channels'] = list(update_channel.CHANNELS)
data['fetch_error'] = fetch_error or None
return data
@api_v3.route('/system/update-channel', methods=['GET'])
def get_update_channel():
"""The update channel: configured, in effect, and what the next update does.
Reads local refs only, unless ``?fetch=1`` asks it to check origin first.
No local except: failures reach the blueprint-wide handler, which logs the
traceback and returns the redacted detail.
"""
fetch = str(request.args.get('fetch', '')).lower() in ('1', 'true', 'yes')
channel, fetch_error = channel_status(fetch=fetch)
return jsonify({'status': 'success', 'data': _channel_payload(channel, fetch_error)})
@api_v3.route('/system/update-channel', methods=['POST'])
def set_update_channel():
"""Switch between the stable and beta update channels: ``{"channel": "stable"}``.
Only the setting changes here; the next Update Code or weekly update
applies it. Switching to stable never moves a device backwards: one
running code newer than the newest release keeps following main until a
release includes it, and the response says so.
"""
from web_interface import update_channel
payload = request.get_json(silent=True)
channel = update_channel.normalize_channel(payload.get('channel')) if isinstance(payload, dict) else None
if channel is None:
return jsonify({'status': 'error',
'message': "channel must be 'stable' or 'beta'"}), 400
cm = getattr(api_v3, 'config_manager', None)
if not cm:
return jsonify({'status': 'error', 'message': 'Config manager not initialized'}), 503
update_channel.set_channel(cm, channel)
_update_check_cache['result'] = None
status, _ = channel_status(fetch=False)
if channel == 'beta':
message = (f'Switched to the beta channel. Updates now follow {update_channel.BETA_BRANCH}, '
'the newest code, before it is released.')
elif status.action == update_channel.ACTION_CHECKOUT_TAG:
message = (f'Switched to the stable channel. The next update moves this device to release '
f'{status.newest_release}.')
else:
# On the newest release already, or waiting for one that includes
# this commit; status.message says which.
message = f'Switched to the stable channel. {status.message}'
if channel == 'beta' or status.action == update_channel.ACTION_CHECKOUT_TAG:
message += ' Use Update Code on the Overview tab to apply it now.'
return jsonify({'status': 'success', 'message': message, 'data': _channel_payload(status)})
@api_v3.route('/system/check-update', methods=['GET'])
def check_for_update():
"""Check whether newer LEDMatrix code is available on this device's update channel.
stable compares HEAD with the newest release tag; beta (and stable while
it waits on a branch for a release newer than this commit) with
origin/main. When the channel says an update would do nothing -- on the
newest release, or detached and newer than it -- it is never reported
as available, whatever origin/main holds. The
response carries ``channel``, ``waiting``, ``newest_release`` and, when
the update is a release, ``target_version``.
"""
now = _pkg.time.time()
if _update_check_cache['result'] and now - _update_check_cache['ts'] < _UPDATE_CHECK_TTL:
return jsonify(_update_check_cache['result'])
from web_interface import update_channel
_safe: Dict[str, Any] = {'update_available': False, 'remote_sha': 'unknown', 'commits_behind': 0}
try:
cwd = str(PROJECT_ROOT)
fetch_result = subprocess.run(
# main and the release tags only: this runs on page loads, with
# a short timeout, and other branches are not needed to answer.
['git', 'fetch', '--quiet', '--tags', '--force', update_channel.REMOTE,
update_channel.BETA_BRANCH],
capture_output=True, timeout=10, cwd=cwd,
)
if fetch_result.returncode != 0:
stderr = fetch_result.stderr.decode(errors='replace').strip()
logger.warning("check-update: git fetch failed (rc=%d): %s",
fetch_result.returncode, stderr)
failed = _update_check_failed(_describe_git_failure(stderr))
_update_check_cache['result'] = failed
_update_check_cache['ts'] = now
return jsonify(failed)
channel, _ = channel_status(cwd, fetch=False)
channel_fields = {'channel': channel.channel, 'configured_channel': channel.configured,
'waiting': channel.waiting, 'newest_release': channel.newest_release,
'current_release': channel.current_release,
'channel_message': channel.message}
if channel.channel == 'stable' or channel.action == update_channel.ACTION_NONE:
# On a release (or about to move to one): compare tags, not
# branch commits -- main is always ahead of the newest release.
# ACTION_NONE covers a detached HEAD newer than the newest
# release too: Update Code leaves it where it is until a release
# includes it, so origin/main being ahead is not an update it
# would install. channel_message says so, in the General tab's
# words.
result = {'update_available': False, 'remote_sha': channel.newest_release_sha or 'unknown',
'commits_behind': 0, **channel_fields}
if channel.action == update_channel.ACTION_CHECKOUT_TAG:
count_str = subprocess.run(
['git', 'rev-list', '--count', f'HEAD..{channel.newest_release_sha}'],
capture_output=True, text=True, timeout=5, cwd=cwd,
).stdout.strip()
result.update(update_available=True, target_version=channel.newest_release,
commits_behind=int(count_str) if count_str.isdigit() else 0)
_update_check_cache['result'] = result
_update_check_cache['ts'] = now
return jsonify(result)
local = subprocess.run(
['git', 'rev-parse', 'HEAD'],
capture_output=True, text=True, timeout=5, cwd=cwd,
).stdout.strip()
remote = subprocess.run(
['git', 'rev-parse', 'origin/main'],
capture_output=True, text=True, timeout=5, cwd=cwd,
).stdout.strip()
if not local or not remote:
return jsonify({**_safe, **channel_fields})
if local == remote:
result: Dict[str, Any] = {'update_available': False, 'remote_sha': remote, 'commits_behind': 0}
else:
count_str = subprocess.run(
['git', 'rev-list', 'HEAD..origin/main', '--count'],
capture_output=True, text=True, timeout=5, cwd=cwd,
).stdout.strip()
count = int(count_str) if count_str.isdigit() else 0
result = {'update_available': count > 0, 'remote_sha': remote, 'commits_behind': count}
result.update(channel_fields)
_update_check_cache['result'] = result
_update_check_cache['ts'] = now
return jsonify(result)
except Exception as e:
logger.warning("check-update failed: %s", e)
return jsonify(_update_check_failed(
"Could not check for updates; see logs for details."))
#: sudo's own wording when it needs a password it cannot ask for. The web
#: interface runs unprivileged, so its systemctl/reboot/journalctl calls only
#: work once scripts/install/configure_web_sudo.sh has granted NOPASSWD --
#: which first_time_install.sh does not do. That makes this the common case on
#: a fresh device, and "Action failed; see logs for details" named none of it,
#: while the log viewer was broken for the very same reason.
_SUDO_NEEDS_PASSWORD = (
'a password is required',
'no tty present',
'a terminal is required',
)
_SUDO_HINT = (
'Passwordless sudo is not configured for the web interface user, so this '
'action cannot run. Run scripts/install/configure_web_sudo.sh as that user, '
'then retry.'
)
def _sudo_hint_for(text):
"""An actionable hint when `text` is sudo refusing to prompt, else None."""
lowered = (text or '').lower()
if any(marker in lowered for marker in _SUDO_NEEDS_PASSWORD):
return _SUDO_HINT
return None
_core_update_lock = threading.Lock()
#: The core's own requirement files, installed after a pull that changes them.
#: scripts/fix_perms/safe_pip_install.sh must accept every one (it refuses
#: anything it does not list), and scripts/utils/auto_update_verify.py
#: reinstalls the same files when it rolls an update back.
CORE_REQUIREMENT_FILES = ('requirements.txt', 'web_interface/requirements.txt')
def perform_core_update(stash_local_changes=True):
"""Pull the latest LEDMatrix code and sync its dependencies.
Shared by the Overview "Update Code" button and the weekly automatic
updater (web_interface/auto_update.py), so both take exactly the same
path. Returns the JSON-able payload the button has always received:
``status``, ``message`` and ``restart_required``.
Update Code stashes local edits before pulling. The automatic updater
passes ``stash_local_changes=False``: then local edits make this return
an error carrying ``local_changes`` (the edited paths) without pulling.
"""
# The button and the scheduler can fire together; two pulls racing
# over one checkout (and one stash) is how local changes get lost.
if not _core_update_lock.acquire(blocking=False):
return {'status': 'error', 'restart_required': False,
'message': 'An update is already in progress; try again shortly.'}
try:
return _perform_core_update_locked(stash_local_changes)
finally:
_core_update_lock.release()
def _load_config_quietly():
# getattr: the blueprint only has a config_manager once the app wired one.
cm = getattr(api_v3, 'config_manager', None)
if not cm:
return {}
try:
return cm.load_config() or {}
except Exception:
logger.warning("Could not load config to read the update channel", exc_info=True)
return {}
def _persist_stable_channel():
"""A config that predates channels moves to stable once it is on a release."""
cm = getattr(api_v3, 'config_manager', None)
if not cm:
return
from web_interface import update_channel
try:
update_channel.set_channel(cm, 'stable')
logger.info("Update channel set to stable: this device is on a release now")
except Exception:
logger.warning("Could not save the stable update channel", exc_info=True)
def channel_status(project_dir=None, fetch=True):
"""The update channel's plan for this checkout (update_channel.resolve).
Returns ``(status, fetch_error)``; ``fetch_error`` is git's first line
when fetching failed, else ''.
"""
from web_interface import update_channel
project_dir = str(project_dir or PROJECT_ROOT)
fetch_error = ''
if fetch:
fetched = update_channel.fetch(project_dir)
if fetched.returncode != 0:
stderr = fetched.stderr.decode(errors='replace') if isinstance(fetched.stderr, bytes) else (fetched.stderr or '')
fetch_error = next((ln.strip() for ln in stderr.splitlines() if ln.strip()), 'git fetch failed')
return update_channel.resolve(project_dir, _load_config_quietly()), fetch_error
def _perform_core_update_locked(stash_local_changes=True):
project_dir = str(PROJECT_ROOT)
from web_interface import update_channel, git_index_lock
# A git killed mid-command (a timed-out pull, a power cut) leaves
# .git/index.lock behind, and every later update then fails with
# "Unable to create .../index.lock: File exists". Remove it when no git
# process can still own it; refuse while one is running.
if git_index_lock.clear_stale_index_lock(project_dir) == git_index_lock.IN_USE:
return {'status': 'error', 'restart_required': False, 'dependency_failures': [],
'message': 'Another git command is running in the LEDMatrix folder; '
'try again in a minute.'}
# Which code to move to: the newest release (stable) or main (beta).
# See web_interface/update_channel.py; it never picks an older commit.
channel, fetch_error = channel_status(project_dir)
if fetch_error:
logger.warning("git fetch failed before update: %s", fetch_error)
return {'status': 'error', 'message': f"Update failed: {fetch_error}",
'restart_required': False, 'dependency_failures': []}
action = channel.action
if action == update_channel.ACTION_NONE:
if channel.migrate:
_persist_stable_channel()
return {'status': 'success', 'restart_required': False, 'dependency_failures': [],
'channel': channel.channel,
'message': f"LEDMatrix is already up to date. {channel.message}"}
# Decide how to pull BEFORE stashing. If this checkout cannot be
# updated at all, stashing first would put the user's local changes
# away for an update that was never going to run.
pull_args, upstream_note = None, ''
if action == update_channel.ACTION_PULL:
pull_args, upstream_note, pull_error = resolve_pull_command(project_dir)
if pull_error:
logger.warning("git pull not attempted: %s", pull_error)
return {'status': 'error', 'message': pull_error, 'restart_required': False}
# Local changes, counted exactly as the automatic update's preflight
# counts them (auto_update.local_changes): mode-only changes and the
# plugin folders don't count, and the pull's --autostash carries those
# across and reapplies them.
from web_interface import auto_update
try:
changed = auto_update.local_changes(project_dir)
except (subprocess.SubprocessError, OSError) as status_err:
logger.warning("git status failed before pull: %s", status_err)
changed = None
# When git cannot say, assume there are changes rather than pull over them.
has_changes = changed is None or bool(changed)
if has_changes and not stash_local_changes:
# The automatic updater: it promised not to stash, and nothing would
# ever restore a stash taken on its behalf.
return {'status': 'error', 'restart_required': False, 'dependency_failures': [],
'local_changes': list(changed or []),
'message': auto_update.describe_local_changes(changed)}
stash_info = ""
# Stash local changes if they exist. The plugin folders are left out:
# plugins are separate installs, and --autostash carries their edits.
if has_changes:
try:
stash_result = subprocess.run(
['git', 'stash', 'push', '-m', 'LEDMatrix auto-stash before update', '--',
*(f':!{folder}' for folder in auto_update.SEPARATE_INSTALL_DIRS)],
capture_output=True,
text=True,
timeout=30,
cwd=project_dir
)
if stash_result.returncode == 0:
logger.debug("git stash: stashed local changes before pull")
stash_info = " Local changes were stashed."
else:
logger.warning("git stash failed before pull (returncode=%d)", stash_result.returncode)
except subprocess.TimeoutExpired:
logger.warning("git stash timed out, proceeding with pull")
# Record HEAD before the pull so dependency changes can be detected
old_head = None
try:
_pre = subprocess.run(['git', 'rev-parse', 'HEAD'],
capture_output=True, text=True, timeout=10, cwd=project_dir)
if _pre.returncode == 0:
old_head = _pre.stdout.strip()
except subprocess.TimeoutExpired:
logger.warning("git rev-parse timed out before pull")
# Whether the pull actually brought new code in. "Already up to
# date" is a success too, and prompting for a restart then would
# train users to ignore the prompt.
code_changed = False
unit_result = None
# Requirement files whose install failed. The automatic updater refuses
# to restart onto code whose dependencies did not install.
dependency_failures = []
# Move the checkout. A pull on beta; branches without an upstream were
# given an explicit "origin <branch>" above so the update still works.
# Stable checks out the release tag, carrying edits across the way the
# pull's --autostash does.
channel_note = ''
if action == update_channel.ACTION_CHECKOUT_TAG:
result, autostash_note = update_channel.checkout_release(project_dir, channel.newest_release)
channel_note = f"Now on release {channel.newest_release} (stable channel). {autostash_note}".strip()
elif action == update_channel.ACTION_SWITCH_TO_BETA:
result, autostash_note = update_channel.checkout_beta_branch(project_dir)
if result.returncode == 0:
result = subprocess.run(['git', 'pull', '--rebase', '--autostash'],
capture_output=True, text=True, timeout=60, cwd=project_dir)
channel_note = f"Now following {update_channel.BETA_BRANCH} (beta channel). {autostash_note}".strip()
else:
result = subprocess.run(
pull_args,
capture_output=True,
text=True,
timeout=60,
cwd=project_dir
)
if channel.waiting and channel.newest_release:
channel_note = channel.message
# Give the branch tracking information so the next pull is a plain
# `git pull` — otherwise every update repeats the fallback.
if result.returncode == 0 and upstream_note:
branch = _git_current_branch(project_dir)
if branch:
try:
subprocess.run(
['git', 'branch', f'--set-upstream-to=origin/{branch}', branch],
capture_output=True, text=True, timeout=10, cwd=project_dir)
except (subprocess.TimeoutExpired, OSError) as exc:
logger.debug("could not set upstream for %s: %s", branch, exc)
# Return custom response for git_pull
if result.returncode == 0:
pull_message = "Code updated successfully."
if has_changes:
pull_message = f"Code updated successfully. Local changes were automatically stashed.{stash_info}"
# A checkout (a channel move) prints nothing; it always moved.
if (action != update_channel.ACTION_PULL
or (result.stdout and "Already up to date" not in result.stdout)):
pull_message = f"Code updated successfully.{stash_info}"
if upstream_note:
pull_message = f"{pull_message} {upstream_note}"
if channel_note:
pull_message = f"{pull_message} {channel_note}"
if channel.migrate and action == update_channel.ACTION_CHECKOUT_TAG:
_persist_stable_channel()
# Keep Python dependencies in sync automatically: if the pull
# changed a requirements file, install it now — users updating
# from the web UI (most of them) never SSH in to pip install.
# Installs go through the same root-visible path as the
# Tools-tab buttons (_pip_install_requirements).
dep_notes = []
try:
_post = subprocess.run(['git', 'rev-parse', 'HEAD'],
capture_output=True, text=True, timeout=10, cwd=project_dir)
new_head = _post.stdout.strip() if _post.returncode == 0 else None
if old_head and new_head and old_head != new_head:
code_changed = True
diff = subprocess.run(
['git', 'diff', '--name-only', f'{old_head}..{new_head}'],
capture_output=True, text=True, timeout=15, cwd=project_dir)
changed = set(diff.stdout.split()) if diff.returncode == 0 else set()
for rel in CORE_REQUIREMENT_FILES:
req_path = PROJECT_ROOT / rel
if rel not in changed or not req_path.exists():
continue
# Each file's install is isolated: a timeout or
# OSError (e.g. the sudo wrapper/interpreter
# missing) on one file must not abort the other.
try:
r = _pip_install_requirements(req_path, timeout=180)
if r.returncode == 0:
dep_notes.append(f"Dependencies from {rel} updated.")
else:
dependency_failures.append(rel)
dep_notes.append(
f"Dependency install from {rel} failed — "
"run Install Base Requirements from the Tools tab.")
logger.warning("post-update pip install failed for %s: %s",
rel, _truncate_output(r.stdout, r.stderr))
except subprocess.TimeoutExpired:
dependency_failures.append(rel)
dep_notes.append(
f"Dependency install from {rel} timed out — "
"run Install Base Requirements from the Tools tab.")
logger.warning("post-update pip install timed out for %s", rel)
except OSError as install_err:
dependency_failures.append(rel)
dep_notes.append(
f"Dependency install from {rel} failed — "
"run Install Base Requirements from the Tools tab.")
logger.warning("post-update pip install errored for %s: %s",
rel, install_err)
except subprocess.TimeoutExpired:
logger.warning("post-update dependency sync timed out")
if dep_notes:
pull_message += " " + " ".join(dep_notes)
# A `git pull` restores built-in plugins (committed under
# plugin-repos/) even if the user uninstalled them. Re-remove
# any the user previously uninstalled so the update doesn't
# resurrect them.
if api_v3.plugin_store_manager:
try:
purged = api_v3.plugin_store_manager.purge_uninstalled_plugins()
if purged:
logger.info(
"Re-removed %d uninstalled plugin(s) restored by update: %s",
len(purged), ", ".join(purged),
)
except (OSError, RuntimeError) as purge_err:
logger.warning("Post-update plugin purge failed: %s", purge_err)
# The new code may come with new systemd unit settings (systemd/*).
# Install them now, so the restart that follows runs under them; the
# automatic update's rollback puts the old ones back.
if code_changed:
from web_interface import unit_refresh
unit_result = unit_refresh.refresh_after_update()
if unit_result['message']:
pull_message += " " + unit_result['message']
else:
logger.warning("git pull failed (returncode=%d): %s", result.returncode, result.stderr)
# Show git's own first line: "check logs" leaves the user with
# nothing to act on, and these failures are usually actionable
# (conflicting local commits, no upstream, network).
detail = next((ln.strip() for ln in (result.stderr or '').splitlines()
if ln.strip()), '')
pull_message = f"Update failed: {detail}" if detail else "Update failed; check logs for details"
if 'index.lock' in (result.stderr or ''):
pull_message = f"{pull_message} {git_index_lock.manual_fix_hint(project_dir)}"
# Nothing here restarts anything: the pull replaces files on
# disk while the display and web services keep running the code
# they loaded at boot. Without this the user is told the update
# succeeded and sees no change until they happen to reboot.
return {
'status': 'success' if result.returncode == 0 else 'error',
'message': pull_message,
'restart_required': bool(result.returncode == 0 and code_changed),
'dependency_failures': dependency_failures,
'channel': channel.channel,
# web_interface/unit_refresh.py's result, or None when no code changed.
'unit_refresh': unit_result,
}
@api_v3.route('/system/action', methods=['POST'])
def execute_system_action():
"""Execute system actions (start/stop/reboot/etc)"""
try:
data = request.get_json(silent=True)
if data is None and not request.is_json:
# Every caller in the interface sends JSON (the Quick Actions
# buttons use HTMX's json-enc). A form-encoded body is what a
# cross-site HTML form can send without a CORS preflight, and
# this route reboots, powers off and pulls code, so it is only
# accepted from HTMX: a cross-site form cannot set HX-Request.
# This backs up the app-wide Origin check (origin_guard.py).
if not request.headers.get('HX-Request'):
return jsonify({
'status': 'error',
'message': ('Send the action as JSON '
'(Content-Type: application/json), '
'e.g. {"action": "restart_display_service"}'),
}), 415
data = {
'action': request.form.get('action'),
'mode': request.form.get('mode')
}
if not isinstance(data, dict) or not data.get('action'):
return jsonify({'status': 'error', 'message': 'Action required'}), 400
action = data['action']
mode = data.get('mode') # For on-demand modes
# Map actions to subprocess calls (similar to original implementation)
if action == 'start_display':
if mode:
# For on-demand modes, we would need to integrate with the display controller
# For now, just start the display service
try:
result = subprocess.run(['sudo', 'systemctl', 'start', 'ledmatrix.service'],
capture_output=True, text=True, timeout=10)
except subprocess.TimeoutExpired as e:
logger.error("start_display (%s) timed out: %s", mode, e)
return jsonify({'status': 'error', 'message': 'Command timed out', 'returncode': -1, 'stderr': 'timeout'})
logger.info("start_display (%s) returned code %d", mode, result.returncode)
if result.returncode != 0 and result.stderr:
logger.error("start_display (%s) stderr: %s", mode, result.stderr.strip())
resp = {
'status': 'success' if result.returncode == 0 else 'error',
# This branch returns before the shared nonzero-result
# response below, so it needs the hint of its own or an
# on-demand start reports "Failed to start display" and
# says nothing about the sudo that actually refused it.
'message': (
'Display started' if result.returncode == 0
else _sudo_hint_for(result.stderr) or 'Failed to start display'
),
}
if result.returncode != 0:
resp['returncode'] = result.returncode
resp['stderr'] = result.stderr.strip()
return jsonify(resp)
else:
result = subprocess.run(['sudo', 'systemctl', 'start', 'ledmatrix.service'],
capture_output=True, text=True, timeout=10)
elif action == 'stop_display':
result = subprocess.run(['sudo', 'systemctl', 'stop', 'ledmatrix.service'],
capture_output=True, text=True, timeout=10)
elif action == 'enable_autostart':
result = subprocess.run(['sudo', 'systemctl', 'enable', 'ledmatrix.service'],
capture_output=True, text=True, timeout=10)
elif action == 'disable_autostart':
result = subprocess.run(['sudo', 'systemctl', 'disable', 'ledmatrix.service'],
capture_output=True, text=True, timeout=10)
elif action == 'reboot_system':
result = subprocess.run(['sudo', 'reboot'],
capture_output=True, text=True, timeout=10)
elif action == 'shutdown_system':
result = subprocess.run(['sudo', 'poweroff'],
capture_output=True, text=True, timeout=10)
elif action == 'git_pull':
return jsonify(perform_core_update())
elif action == 'checkout_branch':
# Switch branches from the Tools tab. Needed because a checkout
# that predates tracking (or a restored backup) can leave the pi
# on a branch the update button cannot pull.
result_payload, http_status = checkout_branch(
str(PROJECT_ROOT), data.get('branch') or '', stash=bool(data.get('stash')))
return jsonify(result_payload), http_status
elif action == 'restart_display_service':
result = subprocess.run(['sudo', 'systemctl', 'restart', 'ledmatrix.service'],
capture_output=True, text=True, timeout=10)
elif action == 'restart_web_service':
# Try to restart the web service (assuming it's ledmatrix-web.service)
result = subprocess.run(['sudo', 'systemctl', 'restart', 'ledmatrix-web.service'],
capture_output=True, text=True, timeout=10)
elif action == 'install_base_requirements':
# Base + web interface requirements: flask-compress and friends
# live in web_interface/requirements.txt, not the root file.
req_files = [f for f in (PROJECT_ROOT / 'requirements.txt',
PROJECT_ROOT / 'web_interface' / 'requirements.txt')
if f.exists()]
if not req_files:
return jsonify({'status': 'error', 'message': 'No requirements.txt found at project root'})
outputs = []
all_ok = True
for req_file in req_files:
label = req_file.relative_to(PROJECT_ROOT)
# Isolate each file's install: a timeout or OSError on one
# (e.g. requirements.txt) must not abort the rest of the
# loop (e.g. web_interface/requirements.txt never attempted).
try:
result = _pip_install_requirements(req_file, timeout=120)
all_ok = all_ok and result.returncode == 0
outputs.append(f"== {label} ==\n" + _truncate_output(result.stdout, result.stderr))
except subprocess.TimeoutExpired:
all_ok = False
outputs.append(f"== {label} ==\nTimed out after 120s")
logger.warning("install_base_requirements timed out for %s", label)
except OSError as install_err:
all_ok = False
outputs.append(f"== {label} ==\nFailed: {describe_exception(install_err)}")
logger.warning("install_base_requirements errored for %s: %s", label, install_err)
return jsonify({
'status': 'success' if all_ok else 'error',
'message': 'Base requirements installed successfully' if all_ok else 'pip install failed',
'output': "\n".join(outputs)
})
elif action == 'install_plugin_requirements':
active_pm = getattr(api_v3, 'plugin_catalog', None)
if active_pm:
plugins_dir = Path(active_pm.plugins_dir)
else:
_cm = getattr(api_v3, 'config_manager', None)
_cfg = _cm.load_config() if _cm else {}
_dir_name = _cfg.get('plugin_system', {}).get('plugins_directory', 'plugin-repos')
plugins_dir = Path(_dir_name) if os.path.isabs(_dir_name) else PROJECT_ROOT / _dir_name
results = []
if plugins_dir.exists():
for p in sorted(plugins_dir.iterdir()):
req = p / 'requirements.txt'
if p.is_dir() and req.exists():
try:
r = _pip_install_requirements(req, timeout=60)
results.append({
'plugin': p.name,
'ok': r.returncode == 0,
'output': _truncate_output(r.stdout, r.stderr)
})
except subprocess.TimeoutExpired:
results.append({'plugin': p.name, 'ok': False, 'output': 'pip install timed out'})
except OSError as exc:
results.append({'plugin': p.name, 'ok': False, 'output': exc.strerror or 'OS error'})
ok_count = sum(1 for r in results if r['ok'])
all_ok = all(r['ok'] for r in results) if results else True
return jsonify({
'status': 'success' if all_ok else 'error',
'message': f'Processed {len(results)} plugin(s) — {ok_count} succeeded' if results else 'No plugin requirements.txt files found',
'details': results
})
elif action == 'force_git_reset':
if not _GIT:
return jsonify({'status': 'error', 'message': 'git not found on this system'}), 503
project_dir = str(PROJECT_ROOT)
fetch = subprocess.run(
[_GIT, 'fetch', 'origin'],
capture_output=True, text=True, timeout=30, cwd=project_dir
)
if fetch.returncode != 0:
return jsonify({'status': 'error', 'message': 'git fetch failed', 'output': fetch.stderr.strip()})
reset = subprocess.run(
[_GIT, 'reset', '--hard', 'origin/main'],
capture_output=True, text=True, timeout=30, cwd=project_dir
)
return jsonify({
'status': 'success' if reset.returncode == 0 else 'error',
'message': 'Reset to origin/main successfully' if reset.returncode == 0 else 'git reset failed',
'output': (reset.stdout + reset.stderr).strip()
})
elif action == 'clear_pycache':
cleared = 0
failed = 0
for d in PROJECT_ROOT.rglob('__pycache__'):
if d.is_dir():
try:
shutil.rmtree(d)
cleared += 1
except OSError:
failed += 1
msg = f'Cleared {cleared} __pycache__ directories'
if failed:
msg += f' ({failed} could not be removed)'
return jsonify({'status': 'success', 'message': msg})
else:
return jsonify({'status': 'error', 'message': 'Unknown action'}), 400
logger.info("system action '%s' returncode=%d", action, result.returncode)
if result.returncode != 0 and result.stderr:
logger.error("system action '%s' stderr: %s", action, result.stderr.strip())
resp = {
'status': 'success' if result.returncode == 0 else 'error',
'message': 'Action completed' if result.returncode == 0 else 'Action failed; check logs for details',
}
if result.returncode != 0:
resp['returncode'] = result.returncode
resp['stderr'] = result.stderr.strip()
hint = _sudo_hint_for(result.stderr)
if hint:
resp['message'] = hint
return jsonify(resp)
except subprocess.TimeoutExpired as e:
logger.error("system action '%s' timed out: %s", action, e)
return jsonify({'status': 'error', 'message': 'Command timed out', 'returncode': -1, 'stderr': 'timeout'})
except Exception as e:
logger.error("execute_system_action failed: %s", e, exc_info=True)
resp = {
'status': 'error',
'message': _sudo_hint_for(str(e)) or 'Action failed; see logs for details',
'details': describe_exception(e),
}
return jsonify(resp), 500
@api_v3.route('/system/git-info', methods=['GET'])
def get_git_info():
"""Return branch, dirty state, recent commits and remote URL for the Tools tab."""
if not _GIT:
return jsonify({'status': 'error', 'message': 'git not found on this system'}), 503
d = str(PROJECT_ROOT)
try:
branch = subprocess.run([_GIT, 'branch', '--show-current'], capture_output=True, text=True, timeout=10, cwd=d)
if branch.returncode != 0:
return jsonify({'status': 'error', 'message': f'git branch failed: {branch.stderr.strip()}'}), 500
status = subprocess.run([_GIT, 'status', '--short', '--untracked-files=no'], capture_output=True, text=True, timeout=15, cwd=d)
if status.returncode != 0:
return jsonify({'status': 'error', 'message': f'git status failed: {status.stderr.strip()}'}), 500
log = subprocess.run([_GIT, 'log', '--oneline', '-5'], capture_output=True, text=True, timeout=10, cwd=d)
remote = subprocess.run([_GIT, 'remote', 'get-url', 'origin'], capture_output=True, text=True, timeout=10, cwd=d)
branch_name = branch.stdout.strip()
upstream = _git_upstream(d)
current_release, channel_message = None, ''
if not branch_name:
# Detached is not always "on a release": a device that pulled
# main and was then detached is newer than the newest one.
# Local refs only; the panel must not wait on the network.
try:
channel, _ = channel_status(d, fetch=False)
current_release, channel_message = channel.current_release, channel.message
except Exception:
logger.debug("git-info: could not read the update channel", exc_info=True)
return jsonify({
'branch': branch_name,
# No branch: the stable update channel checks out release tags.
'detached': not branch_name,
'version': get_git_version(),
'current_release': current_release,
'channel_message': channel_message,
'dirty': bool(status.stdout.strip()),
'status': status.stdout.strip(),
'recent_commits': log.stdout.strip() if log.returncode == 0 else '',
'remote_url': _scrub_git_remote_url(remote.stdout.strip()) if remote.returncode == 0 else '',
# Surfaced so the Tools tab can warn before the user clicks Pull
# Latest, rather than after it fails.
'upstream': upstream,
'can_pull': bool(upstream) or _git_remote_branch_exists(d, branch_name),
})
except Exception as e:
logger.error("get_git_info failed: %s", e, exc_info=True)
return jsonify({'status': 'error', 'message': 'Failed to get git info'}), 500
@api_v3.route('/system/git-branches', methods=['GET'])
def get_git_branches():
"""List branches available to switch to, for the Tools tab picker."""
if not _GIT:
return jsonify({'status': 'error', 'message': 'git not found on this system'}), 503
d = str(PROJECT_ROOT)
try:
# Refresh remote refs so a branch created since the last fetch shows up.
subprocess.run([_GIT, 'fetch', 'origin', '--prune'],
capture_output=True, text=True, timeout=60, cwd=d)
local = subprocess.run([_GIT, 'for-each-ref', '--format=%(refname:short)', 'refs/heads'],
capture_output=True, text=True, timeout=15, cwd=d)
remote = subprocess.run([_GIT, 'for-each-ref', '--format=%(refname:short)', 'refs/remotes/origin'],
capture_output=True, text=True, timeout=15, cwd=d)
if local.returncode != 0:
return jsonify({'status': 'error', 'message': 'Could not list branches'}), 500
local_names = [b for b in local.stdout.split() if b]
remote_names = []
for ref in remote.stdout.split() if remote.returncode == 0 else []:
name = ref.split('origin/', 1)[-1]
# origin/HEAD is a symbolic alias, not a branch a user can pick.
if name and name != 'HEAD' and name not in local_names:
remote_names.append(name)
return jsonify({
'status': 'success',
'current': _git_current_branch(d),
'upstream': _git_upstream(d),
'local': sorted(local_names),
'remote_only': sorted(remote_names),
})
except subprocess.TimeoutExpired:
return jsonify({'status': 'error', 'message': 'Timed out talking to the remote'}), 504
except OSError as e:
logger.error("get_git_branches failed: %s", e, exc_info=True)
return jsonify({'status': 'error', 'message': 'Failed to list branches'}), 500