Files
ChuckandClaude Opus 5.5 f841fa36b6 feat(install): updates refresh systemd units; new installs run the newest release (#729)
Updates that move HEAD now install changed systemd units through a root-owned helper (/usr/local/sbin/ledmatrix-refresh-units, two literal sudo lines), with a backup restored on rollback; a refresh that fails part-way puts the old units back. Devices without the new sudo rule keep updating and are told to re-run the installer once. The one-shot installer now checks out the newest vX.Y.Z release (LEDMATRIX_CHANNEL=beta keeps main) and never moves an existing checkout backwards.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-03 13:09:53 -04:00
..

Utility Scripts

This directory contains utility scripts for maintenance and system operations.

Scripts

  • clear_cache.py - Clears LEDMatrix cache data (specific keys or all cache)
  • start_web_conditionally.py - Conditionally starts the web interface based on config settings
  • wifi_monitor_daemon.py - Background daemon that monitors WiFi/Ethernet connection and manages access point mode
  • pixlet_config_editor.sh - Opens Pixlet's own config UI for one installed Starlark app
  • apply_dns_single_request.sh - Adds options single-request to the resolver (run by ledmatrix-dns-fix.service)
  • auto_update_verify.py - Health check after an automatic update, rolling back if it fails (the updater copies it to data/ before pulling and ledmatrix-update-verify.service runs that copy)

Usage

Clear Cache

python3 scripts/utils/clear_cache.py --list          # List cache keys
python3 scripts/utils/clear_cache.py --clear-all      # Clear all cache
python3 scripts/utils/clear_cache.py --clear <key>    # Clear specific key

Start Web Interface Conditionally

This script is typically called by the systemd service (ledmatrix-web.service) and checks the web_display_autostart setting in config/config.json before starting the web interface.

WiFi Monitor Daemon

This daemon is typically run as a systemd service (ledmatrix-wifi-monitor.service) and automatically manages WiFi access point mode based on network connectivity.

Pixlet Config Editor

Run it when you want Pixlet's own config form for a Starlark app -- live render preview, cascading dropdowns -- rather than the LEDMatrix one.

./scripts/utils/pixlet_config_editor.sh                 # list installed apps
./scripts/utils/pixlet_config_editor.sh penndot_signs   # edit, on localhost:8080

Deliberately not a service. It stops the display for the length of the session and pixlet serve listens with no authentication, so it should only be running while you are actually editing. It backs the config up first and restarts the display on exit, however it exits.

It binds loopback only, with no flag to change that: anything that can reach pixlet serve can rewrite the app's config, and a printed warning is not access control. To edit from another machine, forward the port -- SSH does the authenticating and nothing is left listening on the LAN:

ssh -L 8080:localhost:8080 pi@ledpi.local

Apply DNS Single-Request Fix

Installed and run by ledmatrix-dns-fix.service; see systemd/README.md. Safe to run by hand (sudo ./scripts/utils/apply_dns_single_request.sh) and idempotent.