Mixed Rust/Cythonized Python project

[iikaro]

Hello,

I’m using maturin with the mixed Rust/Python repo layout to build a wheel. My project layout is the same as the one described in the documentation.

Running maturin build works fine. At the end of the build, I get a wheel that contains both the Python code .py and the compiled Rust code .pyd. I have installed the wheel in a separate environment and managed to call both Python and Rust functions.

However, instead of packaging .py files together with the Rust code, I would like to package Python code that has been "cythonized", i.e., .pyd files (while still keeping all __init__.py files as well).

To achieve this, I tried pointing maturin to the directory with the compiled Cython files using the python-source configuration, but maturin ignored the .pyd files completely.

My question is:

• Is it possible for maturin to build a single wheel containing both compiled rust code (.pyd) and compiled Cython .pyd code?

[iikaro]

As it turns out, the .pyd files generated as a result of the cythonization and compilation of the Python source code were not being included because they were listed in .gitignore.

The fact that maturin uses .gitignore to decide which files to include during the build is only briefly mentioned in the documentation here (v1.12.6).

In a mixed Rust/Python project, additional files in the Python source dir (but not in .gitignore) will be automatically included in the build outputs (source distribution and/or wheel).

In my original pure Python project the .pyd files are added to .gitignore. However, setuptools still manages to include them when building the wheel. I found maturin’s behavior a bit counterintuitive at first, but understandable.

As a side remark, when creating the Rust crate for my mixed Python/Rust project, my IDE automatically generated a .gitignore that ignored .pyd files. That’s where the devil was hiding.

Anyway, the problem was fixed by simply removing .pyd from .gitignore.