view rust/hg-cpython/src/utils.rs @ 43945:f98f0e3ddaa1

rust-index: add a function to convert PyObject index for hg-core

Function in hg-core need something implementing the `Graph` trait. Right now,
the `hg-cpython` entry points directly turn the PyObject passed as argument
into a `cindex::Index`. However, if we start having the option to use an Index
in Rust, we need to dispatch between the different possible PyObject we could
receive.

So move the "duplicate" call into a unified function. When time come. It will be
easy to update the logic of all interface when the time come.

Differential Revision: https://phab.mercurial-scm.org/D7653

use cpython::{PyDict, PyObject, PyResult, PyTuple, Python};

#[allow(unused)]
pub fn print_python_trace(py: Python) -> PyResult<PyObject> {
    eprintln!("===============================");
    eprintln!("Printing Python stack from Rust");
    eprintln!("===============================");
    let traceback = py.import("traceback")?;
    let sys = py.import("sys")?;
    let kwargs = PyDict::new(py);
    kwargs.set_item(py, "file", sys.get(py, "stderr")?)?;
    traceback.call(py, "print_stack", PyTuple::new(py, &[]), Some(&kwargs))
}