Files
LEDMatrix/scripts/utils
ChuckandClaude Opus 5 b2d9b91a66 fix(update): keep the rollback's pip retries inside the unit time limit
The health check reinstalled the previous requirements by trying the
next bash path after any failure, including a 600 s pip timeout. Two
files, two paths: up to 40 minutes of pip alone, while systemd stops
ledmatrix-update-verify.service at TimeoutStartSec=30min -- killing the
rollback half-way and leaving the update 'verifying' until the web UI
calls it lost.

- Like permission_utils.install_requirements_file, only a sudo refusal
  moves on to the next bash; a pip that ran and failed or timed out is
  not repeated. The refusal wording is one list
  (permission_utils.SUDO_REFUSAL_PHRASES), mirrored in the stdlib-only
  verifier and pinned equal by a test.
- All reinstalls in one rollback share a 600 s budget.
- WORST_CASE_SECONDS adds up every timeout on the longest path (27.5
  min); a test holds it under the unit's TimeoutStartSec and that under
  the web UI's VERIFY_LOST_SECONDS.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-17 09:05:07 -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
  • cleanup_venv.sh - Cleans up Python virtual environment files
  • clear_python_cache.sh - Clears Python cache files (pycache, *.pyc, etc.)
  • 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)

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.