rust-utils: introduce a debug util to print the python stack trace
Differential Revision: https://phab.mercurial-scm.org/D7057
--- a/rust/hg-cpython/src/lib.rs Wed Oct 16 17:16:23 2019 +0300
+++ b/rust/hg-cpython/src/lib.rs Mon Oct 07 23:17:44 2019 +0200
@@ -35,6 +35,7 @@
pub mod exceptions;
pub mod filepatterns;
pub mod parsers;
+pub mod utils;
py_module_initializer!(rustext, initrustext, PyInit_rustext, |py, m| {
m.add(
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/hg-cpython/src/utils.rs Mon Oct 07 23:17:44 2019 +0200
@@ -0,0 +1,13 @@
+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))
+}