asottile / setuptools-golang-examples Goto Github PK

I have a more complex extension I'm trying to write that has a fair amount of Python code and a Python C extension that wraps a library written in Go. The Python code and the Python C extension are in one repo, and the Go code is outside of that. I'm trying to figure out if it's possible to somehow merge the C extension code (c and h files) with the code from the Go library into one directory before building.

It's kind of an odd thing to do, but the purpose of the code in the Go repo is to build a c-shared library that can be used on its own. I'm just wrapping that C API in a Python module.

I have created an example that uses setuptools-golang for compilation of the Go module, but then uses cffi to create the interface to Python.

This means that things like

// #include <Python.h>
// int PyArg_ParseTuple_ll(PyObject*, long*, long*);

are not required anymore. The only glue-code function on the Go-side is one that casts/wraps C arrays to Go slices and the actual function is using Go-native types.

The rest of the gluecode is written in Python and the cffi module compilation is written in Python, too.

Known issue: As of Go 1.6, passing C pointers to and from Go is more strict, producing panics in ArrayToSlice. Since I don't understand how that could be fixed the code currently needs to be run with GODEBUG=cgocheck=0.