From patchwork Fri Oct 11 11:43:04 2019
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Subject: D7057: rust-utils: introduce a debug util to print the python stack
 trace
From: phabricator <phabricator@mercurial-scm.org>
X-Patchwork-Id: 42216
Message-Id: <differential-rev-PHID-DREV-24yg57jndmqfbvnkxshs-req@mercurial-scm.org>
To: Phabricator <phabricator@mercurial-scm.org>
Cc: mercurial-devel@mercurial-scm.org
Date: Fri, 11 Oct 2019 11:43:04 +0000

Alphare created this revision.
Herald added subscribers: mercurial-devel, kevincox, durin42.
Herald added a reviewer: hg-reviewers.

REPOSITORY
  rHG Mercurial

REVISION DETAIL
  https://phab.mercurial-scm.org/D7057

AFFECTED FILES
  rust/hg-cpython/src/lib.rs
  rust/hg-cpython/src/utils.rs

CHANGE DETAILS




To: Alphare, #hg-reviewers
Cc: durin42, kevincox, mercurial-devel

diff --git a/rust/hg-cpython/src/utils.rs b/rust/hg-cpython/src/utils.rs
new file mode 100644
--- /dev/null
+++ b/rust/hg-cpython/src/utils.rs
@@ -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))
+}
diff --git a/rust/hg-cpython/src/lib.rs b/rust/hg-cpython/src/lib.rs
--- a/rust/hg-cpython/src/lib.rs
+++ b/rust/hg-cpython/src/lib.rs
@@ -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(