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// status.rs
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//
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// Copyright 2019, Raphaël Gomès <rgomes@octobus.net>
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//
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// This software may be used and distributed according to the terms of the
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// GNU General Public License version 2 or any later version.
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//! Bindings for the `hg::status` module provided by the
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//! `hg-core` crate. From Python, this will be seen as
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//! `rustext.dirstate.status`.
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use crate::{dirstate::DirstateMap, exceptions::FallbackError};
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use cpython::{
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exc::ValueError, ObjectProtocol, PyBytes, PyErr, PyList, PyObject,
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PyResult, PyTuple, Python, PythonObject, ToPyObject,
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};
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use hg::dirstate::status::StatusPath;
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use hg::matchers::{
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DifferenceMatcher, IntersectionMatcher, Matcher, NeverMatcher,
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UnionMatcher,
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};
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use hg::{
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matchers::{AlwaysMatcher, FileMatcher, IncludeMatcher},
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parse_pattern_syntax,
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utils::{
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files::{get_bytes_from_path, get_path_from_bytes},
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hg_path::{HgPath, HgPathBuf},
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},
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BadMatch, DirstateStatus, IgnorePattern, PatternFileWarning, StatusError,
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StatusOptions,
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};
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use std::borrow::Borrow;
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fn collect_status_path_list(py: Python, paths: &[StatusPath<'_>]) -> PyList {
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collect_pybytes_list(py, paths.iter().map(|item| &*item.path))
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}
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/// This will be useless once trait impls for collection are added to `PyBytes`
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/// upstream.
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fn collect_pybytes_list(
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py: Python,
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iter: impl Iterator<Item = impl AsRef<HgPath>>,
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) -> PyList {
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let list = PyList::new(py, &[]);
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for path in iter {
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list.append(
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py,
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PyBytes::new(py, path.as_ref().as_bytes()).into_object(),
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)
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}
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list
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}
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fn collect_bad_matches(
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py: Python,
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collection: &[(impl AsRef<HgPath>, BadMatch)],
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) -> PyResult<PyList> {
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let list = PyList::new(py, &[]);
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let os = py.import("os")?;
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let get_error_message = |code: i32| -> PyResult<_> {
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os.call(
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py,
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"strerror",
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PyTuple::new(py, &[code.to_py_object(py).into_object()]),
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None,
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)
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};
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for (path, bad_match) in collection.iter() {
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let message = match bad_match {
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BadMatch::OsError(code) => get_error_message(*code)?,
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BadMatch::BadType(bad_type) => {
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format!("unsupported file type (type is {})", bad_type)
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.to_py_object(py)
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.into_object()
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}
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};
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list.append(
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py,
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(PyBytes::new(py, path.as_ref().as_bytes()), message)
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.to_py_object(py)
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.into_object(),
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)
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}
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Ok(list)
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}
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fn handle_fallback(py: Python, err: StatusError) -> PyErr {
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match err {
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StatusError::Pattern(e) => {
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let as_string = e.to_string();
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log::trace!("Rust status fallback: `{}`", &as_string);
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PyErr::new::<FallbackError, _>(py, &as_string)
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}
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e => PyErr::new::<ValueError, _>(py, e.to_string()),
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}
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}
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pub fn status_wrapper(
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py: Python,
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dmap: DirstateMap,
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matcher: PyObject,
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root_dir: PyObject,
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ignore_files: PyList,
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check_exec: bool,
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list_clean: bool,
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list_ignored: bool,
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list_unknown: bool,
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collect_traversed_dirs: bool,
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) -> PyResult<PyTuple> {
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let bytes = root_dir.extract::<PyBytes>(py)?;
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let root_dir = get_path_from_bytes(bytes.data(py));
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let dmap: DirstateMap = dmap.to_py_object(py);
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let mut dmap = dmap.get_inner_mut(py);
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let ignore_files: PyResult<Vec<_>> = ignore_files
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.iter(py)
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.map(|b| {
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let file = b.extract::<PyBytes>(py)?;
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Ok(get_path_from_bytes(file.data(py)).to_owned())
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})
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.collect();
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let ignore_files = ignore_files?;
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// The caller may call `copymap.items()` separately
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let list_copies = false;
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let after_status = |res: Result<(DirstateStatus<'_>, _), StatusError>| {
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let (status_res, warnings) =
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res.map_err(|e| handle_fallback(py, e))?;
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build_response(py, status_res, warnings)
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};
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let matcher = extract_matcher(py, matcher)?;
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dmap.with_status(
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&*matcher,
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root_dir.to_path_buf(),
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ignore_files,
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StatusOptions {
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check_exec,
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list_clean,
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list_ignored,
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list_unknown,
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list_copies,
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collect_traversed_dirs,
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},
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after_status,
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)
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}
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/// Transform a Python matcher into a Rust matcher.
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fn extract_matcher(
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py: Python,
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matcher: PyObject,
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) -> PyResult<Box<dyn Matcher + Sync>> {
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match matcher.get_type(py).name(py).borrow() {
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"alwaysmatcher" => Ok(Box::new(AlwaysMatcher)),
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"nevermatcher" => Ok(Box::new(NeverMatcher)),
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"exactmatcher" => {
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let files = matcher.call_method(
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py,
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"files",
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PyTuple::new(py, &[]),
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None,
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)?;
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let files: PyList = files.cast_into(py)?;
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let files: PyResult<Vec<HgPathBuf>> = files
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.iter(py)
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.map(|f| {
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Ok(HgPathBuf::from_bytes(
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f.extract::<PyBytes>(py)?.data(py),
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))
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})
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.collect();
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let files = files?;
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let file_matcher = FileMatcher::new(files)
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.map_err(|e| PyErr::new::<ValueError, _>(py, e.to_string()))?;
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Ok(Box::new(file_matcher))
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}
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"includematcher" => {
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// Get the patterns from Python even though most of them are
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// redundant with those we will parse later on, as they include
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// those passed from the command line.
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let ignore_patterns: PyResult<Vec<_>> = matcher
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.getattr(py, "_kindpats")?
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.iter(py)?
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.map(|k| {
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let k = k?;
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let syntax = parse_pattern_syntax(
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&[
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k.get_item(py, 0)?
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.extract::<PyBytes>(py)?
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.data(py),
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&b":"[..],
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]
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.concat(),
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)
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.map_err(|e| {
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handle_fallback(py, StatusError::Pattern(e))
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})?;
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let pattern = k.get_item(py, 1)?.extract::<PyBytes>(py)?;
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let pattern = pattern.data(py);
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let source = k.get_item(py, 2)?.extract::<PyBytes>(py)?;
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let source = get_path_from_bytes(source.data(py));
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let new = IgnorePattern::new(syntax, pattern, source);
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Ok(new)
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})
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.collect();
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let ignore_patterns = ignore_patterns?;
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let matcher = IncludeMatcher::new(ignore_patterns)
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.map_err(|e| handle_fallback(py, e.into()))?;
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Ok(Box::new(matcher))
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}
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"unionmatcher" => {
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let matchers: PyResult<Vec<_>> = matcher
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.getattr(py, "_matchers")?
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.iter(py)?
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.map(|py_matcher| extract_matcher(py, py_matcher?))
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.collect();
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Ok(Box::new(UnionMatcher::new(matchers?)))
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}
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"intersectionmatcher" => {
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let m1 = extract_matcher(py, matcher.getattr(py, "_m1")?)?;
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let m2 = extract_matcher(py, matcher.getattr(py, "_m2")?)?;
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Ok(Box::new(IntersectionMatcher::new(m1, m2)))
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}
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"differencematcher" => {
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let m1 = extract_matcher(py, matcher.getattr(py, "_m1")?)?;
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let m2 = extract_matcher(py, matcher.getattr(py, "_m2")?)?;
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Ok(Box::new(DifferenceMatcher::new(m1, m2)))
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}
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e => Err(PyErr::new::<FallbackError, _>(
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py,
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format!("Unsupported matcher {}", e),
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)),
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}
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}
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fn build_response(
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py: Python,
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status_res: DirstateStatus,
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warnings: Vec<PatternFileWarning>,
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) -> PyResult<PyTuple> {
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let modified = collect_status_path_list(py, &status_res.modified);
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let added = collect_status_path_list(py, &status_res.added);
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let removed = collect_status_path_list(py, &status_res.removed);
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let deleted = collect_status_path_list(py, &status_res.deleted);
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let clean = collect_status_path_list(py, &status_res.clean);
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let ignored = collect_status_path_list(py, &status_res.ignored);
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let unknown = collect_status_path_list(py, &status_res.unknown);
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let unsure = collect_status_path_list(py, &status_res.unsure);
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let bad = collect_bad_matches(py, &status_res.bad)?;
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let traversed = collect_pybytes_list(py, status_res.traversed.iter());
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let dirty = status_res.dirty.to_py_object(py);
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let py_warnings = PyList::new(py, &[]);
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for warning in warnings.iter() {
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// We use duck-typing on the Python side for dispatch, good enough for
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// now.
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match warning {
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PatternFileWarning::InvalidSyntax(file, syn) => {
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py_warnings.append(
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py,
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(
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PyBytes::new(py, &get_bytes_from_path(&file)),
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PyBytes::new(py, syn),
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)
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.to_py_object(py)
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.into_object(),
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);
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}
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PatternFileWarning::NoSuchFile(file) => py_warnings.append(
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py,
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PyBytes::new(py, &get_bytes_from_path(&file)).into_object(),
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),
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}
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}
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Ok(PyTuple::new(
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py,
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&[
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unsure.into_object(),
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modified.into_object(),
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added.into_object(),
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removed.into_object(),
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deleted.into_object(),
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clean.into_object(),
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ignored.into_object(),
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unknown.into_object(),
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py_warnings.into_object(),
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bad.into_object(),
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traversed.into_object(),
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dirty.into_object(),
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][..],
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))
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}
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