Re: Packaging a python package that is using setuptools_rust

[Efraim Flashner <efraim@flashner.co.il>]

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On Sun, Oct 25, 2020 at 02:58:22PM +0330, Hamzeh Nasajpour wrote:
> Thanks for your quick reply.
> 
> 
> >   (native-inputs
> >    `(...
> >      ("rust:cargo" ,rust "cargo")
> >      ...))
> 
> Thanks this step passed, but now I face with another error in dependencies. 
> 
> ```
> ...
> phase `patch-generated-file-shebangs' succeeded after 0.0 seconds
> starting phase `build'                                                                                                                                                                                                                      
> running "python setup.py" with command "build" and parameters ()
> running build
> running build_py
> creating build
> creating build/lib
> creating build/lib/etebase
> copying etebase/__init__.py -> build/lib/etebase
> running build_ext
> running build_rust
> error: failed to load source for a dependency on `cpython`
> 
> Caused by:
>   Unable to update registry `https://github.com/rust-lang/crates.io-index`
> 
> Caused by:
>   failed to create directory `/homeless-shelter/.cargo/registry/index/github.com-1ecc6299db9ec823`
> 
> Caused by:
>   Permission denied (os error 13)
> Traceback (most recent call last):
>   File "<string>", line 1, in <module>
>   File "setup.py", line 4, in <module>
> ...
> ```
> 
> indeed, this library is python and internally it's using a rust library. the `cpython` is one its dependencies that I packaged it (`rust-cpython`) and it needs to it. I don't know how can I add rust  dependencies here since I'm using python build system. I added it to inputs but not resolved.
> 
> Indeed now the problem is adding dependencies (some of them rust and some of them python) to this package while I'm using the python build system. Do you have any idea?
> 

This one is a little harder. You can add cargo-build-system phases into
the python-build-system (see icecat for an example) and add a phase to
place the rust dependencies _sources_ in the correct location, or you
can switch it over to a cargo-build-system and add back the
python-build-system phases (see newsboat for an example). IMO the
cargo-build-system option is easier since it takes care of dependency
management for you in terms of #:cargo-inputs.

> 
> Regards,
> Hamzeh
> 
> 
> 

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Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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