Wheels for mixed Python/Rust project does not include Python source code

[padix-key]

Bug Description

Hi, I have a project (https://github.com/biotite-dev/fastpdb) built with maturin that uses mixed Rust/Python code.
However, the wheels built from this project do only include the .so file, the Python source file is not included.
This problem does not appear, when the package is installed from source distribution, via PEP 517 or via maturin develop.
This problem appears with maturin 0.12.14. A few months ago (2021-11-12) (I assume I used the newest version of maturin at this point) this issue did not occur.

Your Python version (python -V)

Python 3.9.9

Your pip version (pip -V)

21.3.1

What bindings you're using

No response

Does cargo build work?

• Yes, it works

If on windows, have you checked that you aren't accidentally using unix path (those with the forward slash /)?

• Yes

Steps to Reproduce

1. maturin build --release -i python -o dist
2. pip install dist/fastpdb-1.0.1-cp39-cp39-manylinux_2_24_x86_64.whl

[messense]

We added support for excluding files from wheel by .gitignore file in #695, your gitignore file excluded .py file in https://github.com/biotite-dev/fastpdb/blob/c78b8d6a608693182ee0b9413bd3636d6b8f5e35/.gitignore#L54

[messense]

Looks like the ignore crate we use behaves differently from git, see BurntSushi/ripgrep#1221.

[padix-key]

Thank you, removing the line in .gitignore solves the problem. Should I keep the issue open, until the upstream issue is fixed?

[messense]

Should I keep the issue open, until the upstream issue is fixed?

Yes, let's keep it open.