ezdxf, matplotlib, and other Python libs try to write into $HOME/.config
and $HOME/.cache. With ProtectHome=true the real /home/busbar is invisible
to the service and pathlib.Path.exists() throws PermissionError.
Fix: set HOME, XDG_CONFIG_HOME, XDG_CACHE_HOME to /opt/busbar-designer/data/*
which is already in ReadWritePaths. Hardening (ProtectHome) stays intact.
install.sh also pre-creates the .config / .cache subdirs.
On Debian 13 with Python 3.13, `python3 -m venv` sometimes finishes without
pip if the user pasted commands that got interrupted (Ctrl-Z, broken pipe).
Now we (1) detect missing pip and tear down + recreate the venv, (2) fall
back to `ensurepip` if even a fresh venv lacks pip. Also dropped --quiet
so install progress is visible.
Server-side OpenSCAD renders STL from bundled hex_cell.scad with parameter
overrides via -D. Frontend is a Three.js viewer with auto-form generated
from /api/holder/params. 'Design busbars →' button posts the computed
cell coordinates to /api/projects and redirects to the busbar editor with
the holder cells pre-loaded.
- holder.py: openscad subprocess wrapper + compute_cells()
(Python mirror of get_hex_center_points_*)
- scad/hex_cell.scad: verbatim copy of Addy/Hex-Cell-Holder source
- app.py: /holder route + /api/holder/{params,render,cells}
- static/holder.html etc: parameter form + Three.js STL viewer
- Dockerfile / install.sh: apt install openscad
- static/index.html: nav link Holder ↔ Busbars in topbar
Web tool for designing nickel/copper busbars over cylindrical-cell battery
packs (21700, 18650) in hex holders. Flask + build123d backend exports
STEP/DXF/SVG; vanilla JS frontend with live preview, multi-project SQLite
persistence, snapshot history.
Deploy scripts in deploy/ (proxmox-lxc.sh, install.sh, update.sh).
wenil