Verified each finding against the code; fixes for the valid ones: - install_dependencies_apt.py: the installer listed 'freetype', but the declared dependency is freetype-py — an apt miss would pip-install the wrong PyPI package. Now installs freetype-py with an import-name mapping (pre-existing bug, surfaced by the review). - api_v3.py: pixel_mapper_config is validated as a string before being saved to display.hardware (JSON callers could previously store an object/list the matrix library can't use). - .cursorrules: the Plugin Loading Process and File Organization sections still said discovery scans plugins/ — now consistent with the corrected overview (configured directory, default plugin-repos/). - README.md: removed the stale '(except the core calendar)' claim — no core calendar exists in src/ — and qualified the plugin inventory (official plugins in the monorepo; third-party from their own repos). - CONFIG_REFERENCE.md: hardware_mapping now shows the code fallback (adafruit-hat-pwm) alongside the template value. - PLUGIN_REGISTRY_SETUP_GUIDE.md: check_plugin.py takes --plugin, not a positional id. - scripts/fix_perms/fix_*.sh: exec bits set so the documented 'sudo ./...' invocations work. - Guard tests hardened: template guard now catches multi-line render_template() calls; widget guard parses actual <script> src values and fails if the widgets dir goes missing; type hints and docstrings added per repo coding guidelines. Skipped with reasons (noted on the PR): limit_refresh_rate_hz 100-vs-90 is documented as intentional in CONFIG_REFERENCE.md; the psutil comment already names the enforcing manifest; docs/archive/ findings are out of scope per the docs policy (archive may rot). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01SXb4mKcAkVaxkeTb3YnAdr
Permission Fix Scripts
This directory contains shell scripts for repairing file/directory permissions on a LEDMatrix installation. They're typically only needed when something has gone wrong — for example, after running parts of the install as the wrong user, after a manual file copy that didn't preserve ownership, or after a permissions-related error from the display or web service.
Most of these scripts require sudo since they touch directories
owned by the ledmatrix service user or by root.
Scripts
-
fix_assets_permissions.sh— Fixes ownership and write permissions on theassets/tree so plugins can download and cache team logos, fonts, and other static content. -
fix_cache_permissions.sh— Fixes permissions on every cache directory the project may use (/var/cache/ledmatrix/,~/.cache/ledmatrix/,/opt/ledmatrix/cache/, project-localcache/). Also creates placeholder logo subdirectories used by the sports plugins. -
fix_plugin_permissions.sh— Fixes ownership on the plugins directory so both the root display service and the web service user can read and write plugin files (manifests, configs, requirements installs). -
fix_web_permissions.sh— Fixes permissions on log files, systemd journal access, and the sudoers entries the web interface needs to control the display service. -
safe_plugin_rm.sh— Validates that a plugin removal path is inside an allowed base directory before deleting it. Used by the web interface (via sudo) when a user clicks Uninstall on a plugin — prevents path-traversal abuse from the web UI.
When to use these
Most users never need to run these directly. The first-time installer
(first_time_install.sh) sets up permissions correctly, and the web
interface manages plugin install/uninstall through the sudoers entries
the installer creates.
Run these scripts only when:
- You see "Permission denied" errors in
journalctl -u ledmatrixor the web UI Logs tab. - You manually copied files into the project directory as the wrong user.
- You restored from a backup that didn't preserve ownership.
- You moved the LEDMatrix directory and need to re-anchor permissions.
Usage
# Run from the project root
sudo ./scripts/fix_perms/fix_cache_permissions.sh
sudo ./scripts/fix_perms/fix_assets_permissions.sh
sudo ./scripts/fix_perms/fix_plugin_permissions.sh
sudo ./scripts/fix_perms/fix_web_permissions.sh
If you're not sure which one you need, run fix_cache_permissions.sh
first — it's the most commonly needed and creates several directories
the other scripts assume exist.