Replacing maturin with setuptools-rust

Maturin really works out of the box locally, but we are having troubles finding a consistent way of distributing the wheels in a place that can be downloaded easily for any distribution (mac or alpine etc) without having to mangle dockerfiles too much

MANIFEST.in

@@ -0,0 +1,2 @@
+include Cargo.toml
+recursive-include src *

README.md

@@ -3,6 +3,6 @@ Rust Service to be called from inside python
 
 This is some rust code that is meant to be installed as a python wheel on the repository and used
 
-It uses [pyo3](https://pyo3.rs) as the binding and [maturin](https://github.com/PyO3/maturin) as the tool that turns the rust code into python
+It uses [pyo3](https://pyo3.rs) as the binding and [setuptools-rust](https://github.com/PyO3/setuptools-rust) as the tool that turns the rust code into python
 
 We hope it provides a new level of speed to the CPU-bound parts of the code 

build-wheels.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+set -ex
+
+curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain stable -y
+export PATH="$HOME/.cargo/bin:$PATH"
+
+cd /io
+
+for PYBIN in /opt/python/cp{35,36,37,38,39}*/bin; do
+    "${PYBIN}/pip" install -U setuptools wheel setuptools-rust
+    "${PYBIN}/python" setup.py bdist_wheel
+done
+
+for whl in dist/*.whl; do
+    auditwheel repair "$whl" -w dist/
+done

pyproject.toml

@@ -0,0 +1,2 @@
+[build-system]
+requires = ["setuptools", "wheel", "setuptools-rust"]

ribs/__init__.py

@@ -0,0 +1 @@
+from rustypole import *

setup.py

@@ -0,0 +1,11 @@
+from setuptools import setup
+from setuptools_rust import Binding, RustExtension
+
+setup(
+    name="ribs",
+    version="1.0",
+    rust_extensions=[RustExtension("ribs.rustypole", binding=Binding.PyO3)],
+    packages=["ribs"],
+    # rust extensions are not zip safe, just like C-extensions.
+    zip_safe=False,
+)