rust-cpython: raising error.WdirUnsupported
The Graph implementation of hg-cpython returns the appropriate error
upon encounter with the working directory special revision number, and
this gives us in particular a code path to test from test-rust-ancestors.py
In the current implementation, the exception is actually raised from
the iterator instantiation; we are nonetheless consuming the iterator
in the test with `list()` in order not to depend on implementation details.
// lib.rs
//
// Copyright 2018 Georges Racinet <gracinet@anybox.fr>
//
// This software may be used and distributed according to the terms of the
// GNU General Public License version 2 or any later version.
//! Python bindings of `hg-core` objects using the `cpython` crate.
//! Once compiled, the resulting single shared library object can be placed in
//! the `mercurial` package directly as `rustext.so` or `rustext.dll`.
//! It holds several modules, so that from the point of view of Python,
//! it behaves as the `cext` package.
//!
//! Example:
//!
//! ```text
//! >>> from mercurial.rustext import ancestor
//! >>> ancestor.__doc__
//! 'Generic DAG ancestor algorithms - Rust implementation'
//! ```
#[macro_use]
extern crate cpython;
extern crate hg;
extern crate libc;
pub mod ancestors;
mod cindex;
mod conversion;
pub mod exceptions;
py_module_initializer!(rustext, initrustext, PyInit_rustext, |py, m| {
m.add(
py,
"__doc__",
"Mercurial core concepts - Rust implementation",
)?;
let dotted_name: String = m.get(py, "__name__")?.extract(py)?;
m.add(py, "ancestor", ancestors::init_module(py, &dotted_name)?)?;
m.add(py, "GraphError", py.get_type::<exceptions::GraphError>())?;
Ok(())
});