WIP: Initial rust build support.

This is just ensure that tests can invoke the built rust code to make
sure that the test/build tooling works.

Author: pelme

.gitignore

@@ -1,4 +1,5 @@
 *.egg-info
+*.so
 *.sqlite3
 .DS_Store
 /*.lock
@@ -7,6 +8,8 @@
 /.jj/
 /.tox/
 /.venv/
+/build/
 /dist/
 /site/
+/target/
 __pycache__/

Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+edition = "2021"
+name = "htpy"
+version = "0.0.0"
+
+[dependencies]
+pyo3 = "0.25"
+
+[lib]
+crate-type = ["cdylib"]
+name = "_rust_impl"
+path = "src/lib.rs"

pyproject.toml

@@ -62,11 +62,13 @@ html2htpy = "htpy.html2htpy:main"
 
 
 [build-system]
-requires = ["setuptools>=64", "setuptools-scm>=8"]
+requires = ["setuptools>=64", "setuptools-scm>=8", "setuptools-rust>=1.11.1"]
 build-backend = "setuptools.build_meta"
 
 [tool.setuptools_scm]
 
+[[tool.setuptools-rust.ext-modules]]
+target = "htpy._rust_impl"
 
 [tool.mypy]
 strict = true

src/htpy/_rust_impl.pyi

@@ -0,0 +1 @@
+def sum_as_string(a: int, b: int) -> str: ...

src/lib.rs

@@ -0,0 +1,12 @@
+use pyo3::prelude::*;
+
+#[pyfunction]
+fn sum_as_string(a: usize, b: usize) -> PyResult<String> {
+    Ok((a + b).to_string())
+}
+
+#[pymodule]
+fn _rust_impl(m: &Bound<'_, PyModule>) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(sum_as_string, m)?)?;
+    Ok(())
+}

tests/test_rust_build.py

@@ -0,0 +1,5 @@
+from htpy._rust_impl import sum_as_string
+
+
+def test_sum_as_string() -> None:
+    assert sum_as_string(21, 21) == "42"