annotate rust/hg-cpython/src/dirstate/status.rs @ 52216:fa58f4f97337 stable tip

ci: shard the test run on mac os X

This should comes with some benefit:
- spread the load across more runner,
- reduce the real-time CI run,
- reduce the "retry" run when we need them.

We start with the Mac jobs, but that would be tremendously useful for Windows
too.

For linux, we need to reduce the startup overhead for this to be worth it.
Building smaller image and speeding up clone should help with that.

// 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, exceptions::FallbackError};
use cpython::{
    exc::ValueError, ObjectProtocol, PyBool, PyBytes, PyErr, PyList, PyObject,
    PyResult, PyTuple, Python, PythonObject, ToPyObject,
};
use hg::dirstate::status::StatusPath;
use hg::matchers::{
    DifferenceMatcher, IntersectionMatcher, Matcher, NeverMatcher,
    PatternMatcher, UnionMatcher,
};
use hg::{
    matchers::{AlwaysMatcher, FileMatcher, IncludeMatcher},
    parse_pattern_syntax_kind,
    utils::{
        files::{get_bytes_from_path, get_path_from_bytes},
        hg_path::{HgPath, HgPathBuf},
    },
    BadMatch, DirstateStatus, IgnorePattern, PatternError, PatternFileWarning,
    StatusError, StatusOptions,
};
use std::borrow::Borrow;

fn collect_status_path_list(py: Python, paths: &[StatusPath<'_>]) -> PyList {
    collect_pybytes_list(py, paths.iter().map(|item| &*item.path))
}

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

    for path in iter {
        list.append(
            py,
            PyBytes::new(py, path.as_ref().as_bytes()).into_object(),
        )
    }

    list
}

fn collect_bad_matches(
    py: Python,
    collection: &[(impl AsRef<HgPath>, BadMatch)],
) -> PyResult<PyList> {
    let list = PyList::new(py, &[]);

    let os = py.import("os")?;
    let get_error_message = |code: i32| -> PyResult<_> {
        os.call(
            py,
            "strerror",
            PyTuple::new(py, &[code.to_py_object(py).into_object()]),
            None,
        )
    };

    for (path, bad_match) in collection.iter() {
        let message = match bad_match {
            BadMatch::OsError(code) => get_error_message(*code)?,
            BadMatch::BadType(bad_type) => {
                format!("unsupported file type (type is {})", bad_type)
                    .to_py_object(py)
                    .into_object()
            }
        };
        list.append(
            py,
            (PyBytes::new(py, path.as_ref().as_bytes()), message)
                .to_py_object(py)
                .into_object(),
        )
    }

    Ok(list)
}

fn handle_fallback(py: Python, err: StatusError) -> PyErr {
    match err {
        StatusError::Pattern(e) => {
            let as_string = e.to_string();
            log::trace!("Rust status fallback: `{}`", &as_string);

            PyErr::new::<FallbackError, _>(py, &as_string)
        }
        e => PyErr::new::<ValueError, _>(py, e.to_string()),
    }
}

pub fn status_wrapper(
    py: Python,
    dmap: DirstateMap,
    matcher: PyObject,
    root_dir: PyObject,
    ignore_files: PyList,
    check_exec: bool,
    list_clean: bool,
    list_ignored: bool,
    list_unknown: bool,
    collect_traversed_dirs: bool,
) -> PyResult<PyTuple> {
    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 mut dmap = dmap.get_inner_mut(py);

    let ignore_files: PyResult<Vec<_>> = ignore_files
        .iter(py)
        .map(|b| {
            let file = b.extract::<PyBytes>(py)?;
            Ok(get_path_from_bytes(file.data(py)).to_owned())
        })
        .collect();
    let ignore_files = ignore_files?;
    // The caller may call `copymap.items()` separately
    let list_copies = false;

    let after_status = |res: Result<(DirstateStatus<'_>, _), StatusError>| {
        let (status_res, warnings) =
            res.map_err(|e| handle_fallback(py, e))?;
        build_response(py, status_res, warnings)
    };

    let matcher = extract_matcher(py, matcher)?;
    dmap.with_status(
        &*matcher,
        root_dir.to_path_buf(),
        ignore_files,
        StatusOptions {
            check_exec,
            list_clean,
            list_ignored,
            list_unknown,
            list_copies,
            collect_traversed_dirs,
        },
        after_status,
    )
}

fn collect_kindpats(
    py: Python,
    matcher: PyObject,
) -> PyResult<Vec<IgnorePattern>> {
    matcher
        .getattr(py, "_kindpats")?
        .iter(py)?
        .map(|k| {
            let k = k?;
            let syntax = parse_pattern_syntax_kind(
                k.get_item(py, 0)?.extract::<PyBytes>(py)?.data(py),
            )
            .map_err(|e| handle_fallback(py, StatusError::Pattern(e)))?;
            let pattern = k.get_item(py, 1)?.extract::<PyBytes>(py)?;
            let pattern = pattern.data(py);
            let source = k.get_item(py, 2)?.extract::<PyBytes>(py)?;
            let source = get_path_from_bytes(source.data(py));
            let new = IgnorePattern::new(syntax, pattern, source);
            Ok(new)
        })
        .collect()
}

/// Transform a Python matcher into a Rust matcher.
fn extract_matcher(
    py: Python,
    matcher: PyObject,
) -> PyResult<Box<dyn Matcher + Sync>> {
    let tampered = matcher
        .call_method(py, "was_tampered_with_nonrec", PyTuple::empty(py), None)?
        .extract::<PyBool>(py)?
        .is_true();
    if tampered {
        return Err(handle_fallback(
            py,
            StatusError::Pattern(PatternError::UnsupportedSyntax(
                "Pattern matcher was tampered with!".to_string(),
            )),
        ));
    };
    match matcher.get_type(py).name(py).borrow() {
        "alwaysmatcher" => Ok(Box::new(AlwaysMatcher)),
        "nevermatcher" => Ok(Box::new(NeverMatcher)),
        "exactmatcher" => {
            let files = matcher.call_method(
                py,
                "files",
                PyTuple::new(py, &[]),
                None,
            )?;
            let files: PyList = files.cast_into(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 file_matcher = FileMatcher::new(files)
                .map_err(|e| PyErr::new::<ValueError, _>(py, e.to_string()))?;
            Ok(Box::new(file_matcher))
        }
        "includematcher" => {
            // Get the patterns from Python even though most of them are
            // redundant with those we will parse later on, as they include
            // those passed from the command line.
            let ignore_patterns = collect_kindpats(py, matcher)?;

            let matcher = IncludeMatcher::new(ignore_patterns)
                .map_err(|e| handle_fallback(py, e.into()))?;

            Ok(Box::new(matcher))
        }
        "unionmatcher" => {
            let matchers: PyResult<Vec<_>> = matcher
                .getattr(py, "_matchers")?
                .iter(py)?
                .map(|py_matcher| extract_matcher(py, py_matcher?))
                .collect();

            Ok(Box::new(UnionMatcher::new(matchers?)))
        }
        "intersectionmatcher" => {
            let m1 = extract_matcher(py, matcher.getattr(py, "_m1")?)?;
            let m2 = extract_matcher(py, matcher.getattr(py, "_m2")?)?;

            Ok(Box::new(IntersectionMatcher::new(m1, m2)))
        }
        "differencematcher" => {
            let m1 = extract_matcher(py, matcher.getattr(py, "_m1")?)?;
            let m2 = extract_matcher(py, matcher.getattr(py, "_m2")?)?;

            Ok(Box::new(DifferenceMatcher::new(m1, m2)))
        }
        "patternmatcher" => {
            let patterns = collect_kindpats(py, matcher)?;

            let matcher = PatternMatcher::new(patterns)
                .map_err(|e| handle_fallback(py, e.into()))?;

            Ok(Box::new(matcher))
        }
        e => Err(PyErr::new::<FallbackError, _>(
            py,
            format!("Unsupported matcher {}", e),
        )),
    }
}

fn build_response(
    py: Python,
    status_res: DirstateStatus,
    warnings: Vec<PatternFileWarning>,
) -> PyResult<PyTuple> {
    let modified = collect_status_path_list(py, &status_res.modified);
    let added = collect_status_path_list(py, &status_res.added);
    let removed = collect_status_path_list(py, &status_res.removed);
    let deleted = collect_status_path_list(py, &status_res.deleted);
    let clean = collect_status_path_list(py, &status_res.clean);
    let ignored = collect_status_path_list(py, &status_res.ignored);
    let unknown = collect_status_path_list(py, &status_res.unknown);
    let unsure = collect_status_path_list(py, &status_res.unsure);
    let bad = collect_bad_matches(py, &status_res.bad)?;
    let traversed = collect_pybytes_list(py, status_res.traversed.iter());
    let dirty = status_res.dirty.to_py_object(py);
    let py_warnings = PyList::new(py, &[]);
    for warning in warnings.iter() {
        // We use duck-typing on the Python side for dispatch, good enough for
        // now.
        match warning {
            PatternFileWarning::InvalidSyntax(file, syn) => {
                py_warnings.append(
                    py,
                    (
                        PyBytes::new(py, &get_bytes_from_path(file)),
                        PyBytes::new(py, syn),
                    )
                        .to_py_object(py)
                        .into_object(),
                );
            }
            PatternFileWarning::NoSuchFile(file) => py_warnings.append(
                py,
                PyBytes::new(py, &get_bytes_from_path(file)).into_object(),
            ),
        }
    }

    Ok(PyTuple::new(
        py,
        &[
            unsure.into_object(),
            modified.into_object(),
            added.into_object(),
            removed.into_object(),
            deleted.into_object(),
            clean.into_object(),
            ignored.into_object(),
            unknown.into_object(),
            py_warnings.into_object(),
            bad.into_object(),
            traversed.into_object(),
            dirty.into_object(),
        ][..],
    ))
}