annotate rust/hg-cpython/src/dirstate/status.rs @ 43273:478d0b1bf0c5

rust-dirstate-status: rust-cpython bindings for `dirstate.status`

The ref-sharing mechanism has improved, but its ergonomics still left a bit
to be desired, as expected.

Differential Revision: https://phab.mercurial-scm.org/D7059

// status.rs
//
// Copyright 2019, Raphaël Gomès <[e-mail]>
//
// 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::status` module provided by the
//! `hg-core` crate. From Python, this will be seen as `rustext.dirstate.status`.
//!

use crate::dirstate::DirstateMap;
use cpython::exc::ValueError;
use cpython::{
    PyBytes, PyErr, PyList, PyObject, PyResult, Python, PythonObject,
    ToPyObject,
};
use hg::utils::files::get_path_from_bytes;

use hg::utils::hg_path::HgPath;
use hg::{status, utils::hg_path::HgPathBuf};

/// This will be useless once trait impls for collection are added to `PyBytes`
/// upstream.
fn collect_pybytes_list<P: AsRef<HgPath>>(
    py: Python,
    collection: &[P],
) -> PyList {
    let list = PyList::new(py, &[]);

    for (i, path) in collection.iter().enumerate() {
        list.insert_item(
            py,
            i,
            PyBytes::new(py, path.as_ref().as_bytes()).into_object(),
        )
    }

    list
}

pub fn status_wrapper(
    py: Python,
    dmap: DirstateMap,
    root_dir: PyObject,
    files: PyList,
    list_clean: bool,
    last_normal_time: i64,
    check_exec: bool,
) -> PyResult<(PyList, PyList, PyList, PyList, PyList, PyList, PyList)> {
    let bytes = root_dir.extract::<PyBytes>(py)?;
    let root_dir = get_path_from_bytes(bytes.data(py));

    let dmap: DirstateMap = dmap.to_py_object(py);
    let dmap = dmap.get_inner(py);

    let files: PyResult<Vec<HgPathBuf>> = files
        .iter(py)
        .map(|f| Ok(HgPathBuf::from_bytes(f.extract::<PyBytes>(py)?.data(py))))
        .collect();
    let files = files?;

    let (lookup, status_res) = status(
        &dmap,
        &root_dir,
        &files,
        list_clean,
        last_normal_time,
        check_exec,
    )
    .map_err(|e| PyErr::new::<ValueError, _>(py, e.to_string()))?;

    let modified = collect_pybytes_list(py, status_res.modified.as_ref());
    let added = collect_pybytes_list(py, status_res.added.as_ref());
    let removed = collect_pybytes_list(py, status_res.removed.as_ref());
    let deleted = collect_pybytes_list(py, status_res.deleted.as_ref());
    let clean = collect_pybytes_list(py, status_res.clean.as_ref());
    let lookup = collect_pybytes_list(py, lookup.as_ref());
    let unknown = PyList::new(py, &[]);

    Ok((lookup, modified, added, removed, deleted, unknown, clean))
}