Rust Modules

Rye recommends using maturin to develop Rust Python extension modules. This process is largely automated and new projects can be created with rye init.

New Project

rye init my-project --build-system maturin
cd my-project

The following structure will be created:

.
├── .git
├── .gitignore
├── .python-version
├── README.md
├── pyproject.toml
├── Cargo.toml
├── python
    └── my_project
        └── __init__.py
└── src
    └── lib.rs

Iterating

When you use maturin as a build system then rye sync will automatically build the rust extension module into your venv. Likewise rye build will use maturin to trigger a wheel build. For faster iteration it's recommended to use maturin directly.

If you want to use other maturin commands such as maturin develop you can install it as a global tool:

rye install maturin

Note that maturin develop requires pip to be installed into the virtualenv. Before you can use it you need to add it:

rye add --dev pip
rye sync

Rye recommends mixed python/rust modules. In that case you can save some valuable iteration time by running maturin develop --skip-install:

maturin develop --skip-install