Initial binding infrastructure

crates/servicepoint_binding_py/Cargo.toml

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+[package]
+name = "servicepoint_binding_py"
+metadata.maturin.name = "servicepoint"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[lib]
+name = "servicepoint_binding_py"
+crate-type = ["cdylib"]
+
+[dependencies]
+pyo3 = "0.21.1"

crates/servicepoint_binding_py/Makefile

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+.phony:
+build:
+	cargo build
+	pip uninstall -y servicepoint
+	pip install --editable .
+	python -c "import servicepoint as s; print(dir(s)); print(dir(s.rust_bindings))"

crates/servicepoint_binding_py/examples/fnord_sign/example.py

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+

crates/servicepoint_binding_py/examples/fnord_sign/pyproject.toml

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+

crates/servicepoint_binding_py/pyproject.toml

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+[build-system]
+requires = ["maturin>=1.6,<2.0"]
+build-backend = "maturin"
+
+[project]
+name = "servicepoint"
+requires-python = ">=3.8"
+classifiers = [
+    "Programming Language :: Rust",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+]
+dynamic = ["version"]
+
+[tool.maturin]
+module-name = "servicepoint.rust_bindings"
+features = ["pyo3/extension-module"]

crates/servicepoint_binding_py/servicepoint/.gitignore

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+*.so

crates/servicepoint_binding_py/servicepoint/__init__.py

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+from . import rust_bindings
+
+__doc__ = rust_bindings.__doc__
+if hasattr(rust_bindings, "__all__"):
+    __all__ = rust_bindings.__all__

crates/servicepoint_binding_py/src/lib.rs

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+use pyo3::prelude::*;
+
+/// Formats the sum of two numbers as string.
+#[pyfunction]
+#[pyo3(name = "fnord")]
+pub fn sum_as_string(a: usize, b: usize) -> PyResult<String> {
+    Ok((a + b).to_string())
+}
+
+/// A Python module implemented in Rust.
+#[pymodule]
+#[pyo3(name = "rust_bindings")]
+fn servicepoint_binding_py(m: &Bound<'_, PyModule>) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(sum_as_string, m)?)?;
+    Ok(())
+}