Mercurial > hg
view rust/hg-cpython/src/ancestors.rs @ 40965:5532823e8c18
rust-cpython: start cpython crate bindings
This changeset introduces the hg-cpython crate,
that compiles as a shared library holding a whole
Python package (mercurial.rustext), with only the empty
'ancestor' submodule for now.
Such bindings will be easier and safer to develop and maintain
that those of `hg-direct-ffi`.
They don't involve C code, only unsafe Rust that's mostly isolated
within the cpython crate.
The long-term goal would be to import the provided modules, such
as rustext.ancestor with mercurial.policy.importmod, same as
we already do with cext modules.
Differential Revision: https://phab.mercurial-scm.org/D5434
author | Georges Racinet <gracinet@anybox.fr> |
---|---|
date | Mon, 03 Dec 2018 06:52:17 +0100 |
parents | |
children | d9f439fcdb4c |
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// ancestors.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. //! Bindings for the hg::ancestors module provided by the //! `hg-core` crate. From Python, this will be seen as `rustext.ancestor` use cpython::{PyDict, PyModule, PyResult, Python}; /// Create the module, with __package__ given from parent pub fn init_module(py: Python, package: &str) -> PyResult<PyModule> { let dotted_name = &format!("{}.ancestor", package); let m = PyModule::new(py, dotted_name)?; m.add(py, "__package__", package)?; m.add( py, "__doc__", "Generic DAG ancestor algorithms - Rust implementation", )?; let sys = PyModule::import(py, "sys")?; let sys_modules: PyDict = sys.get(py, "modules")?.extract(py)?; sys_modules.set_item(py, dotted_name, &m)?; // Example C code (see pyexpat.c and import.c) will "give away the // reference", but we won't because it will be consumed once the // Rust PyObject is dropped. Ok(m) }