b123d-setup

A small CLI for creating build123d CAD projects managed by uv. The generator has no runtime dependencies. CAD dependencies are installed in each generated project's own environment.

Quick start

Install uv, then run:

uvx b123d-setup my-part --with-vscode
cd my-part
uv run -m scripts.export_all

To use a local checkout, run this from the repository directory instead:

uvx --from . b123d-setup my-part --with-vscode

To run directly from GitHub:

uvx --from git+https://github.com/kirisaki/b123d-setup.git b123d-setup my-part --with-vscode

The generator only creates files. The first uv run or uv sync in the generated project installs its dependencies and creates .venv and uv.lock. Generated projects use Python 3.11; uv downloads it if needed. Commit uv.lock to preserve the resolved dependency versions.

Preview in VS Code

Open the generated project in VS Code and install the recommended Python and OCP CAD Viewer extensions. Start OCP CAD Viewer, then run:

uv run main.py

Edit parts/base_plate.py and run the command again to preview your changes. For F5 debugging, run uv sync first and select the project's .venv interpreter.

CLI

b123d-setup DIRECTORY [--with-vscode]
b123d-setup --name DIRECTORY [--with-vscode]
b123d-setup --help
b123d-setup --version

• Create a project in a new directory or an existing empty directory.
• Nonempty directories are rejected; existing files are never overwritten.
• --with-vscode adds settings, launch configurations, and extension recommendations.

Generated project

my-part/
├── pyproject.toml
├── .python-version
├── .gitignore
├── README.md
├── main.py
├── parts/
│   ├── __init__.py
│   └── base_plate.py
├── assembly/
├── scripts/
│   ├── __init__.py
│   └── export_all.py
├── exports/
└── .vscode/              # With --with-vscode

The sample is a 60 × 40 × 3 mm plate with six 3 mm diameter through holes. Run uv run -m scripts.export_all from the project directory to export STEP and STL files into exports/. Exporting does not require a viewer.

Jupyter is optional. Start it in the generated project with:

uv run --extra notebook jupyter lab

Development and building

uv run python -m unittest discover -s tests -v
uv build
uvx --from ./dist/b123d_setup-0.1.1-py3-none-any.whl b123d-setup --help

Building creates a wheel and source distribution in dist/.

Publishing

The publish.yml workflow tests and builds the package on pushes to main and pull requests. Only a manual run from main publishes to PyPI, using Trusted Publishing with the GitHub environment pypi. No API token is needed.

For the first release, register a pending publisher at PyPI Publishing with:

Then open Actions → Build and publish to PyPI → Run workflow and select main. Each subsequent release needs a new version in pyproject.toml and an updated uv.lock before running the workflow again.