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annotate rust/hg-cpython/src/dagops.rs @ 50751:b9eb65a1ec14 stable

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extensions: address ast deprecations introduced in Python 3.12 Tests would fail with: .../mercurial/extensions.py:910: DeprecationWarning: ast.Str is deprecated and will be removed in Python 3.14; use ast.Constant instead if isinstance(a, ast.Str): .../mercurial/extensions.py:912: DeprecationWarning: ast.Bytes is deprecated and will be removed in Python 3.14; use ast.Constant instead elif isinstance(a, ast.Bytes): .../mercurial/extensions.py:913: DeprecationWarning: Attribute s is deprecated and will be removed in Python 3.14; use value instead name = a.s
author Mads Kiilerich <mads@kiilerich.com>
date Tue, 27 Jun 2023 22:31:44 +0200
parents 8b8054b8e5a7
children 4c5f6e95df84
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1 // dagops.rs
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2 //
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3 // Copyright 2019 Georges Racinet <georges.racinet@octobus.net>
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4 //
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5 // This software may be used and distributed according to the terms of the
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6 // GNU General Public License version 2 or any later version.
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7
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8 //! Bindings for the `hg::dagops` module provided by the
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9 //! `hg-core` package.
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10 //!
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11 //! From Python, this will be seen as `mercurial.rustext.dagop`
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12 use crate::{conversion::rev_pyiter_collect, exceptions::GraphError};
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13 use cpython::{PyDict, PyModule, PyObject, PyResult, Python};
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14 use hg::dagops;
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15 use hg::Revision;
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16 use std::collections::HashSet;
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17 use vcsgraph::ancestors::node_rank;
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18 use vcsgraph::graph::{Parents, Rank};
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19
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20 use crate::revlog::pyindex_to_graph;
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21
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22 /// Using the the `index`, return heads out of any Python iterable of Revisions
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23 ///
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24 /// This is the Rust counterpart for `mercurial.dagop.headrevs`
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25 pub fn headrevs(
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26 py: Python,
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27 index: PyObject,
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28 revs: PyObject,
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29 ) -> PyResult<HashSet<Revision>> {
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30 let mut as_set: HashSet<Revision> = rev_pyiter_collect(py, &revs)?;
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31 dagops::retain_heads(&pyindex_to_graph(py, index)?, &mut as_set)
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32 .map_err(|e| GraphError::pynew(py, e))?;
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33 Ok(as_set)
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34 }
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35
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36 /// Computes the rank, i.e. the number of ancestors including itself,
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37 /// of a node represented by its parents.
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38 pub fn rank(
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39 py: Python,
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40 index: PyObject,
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41 p1r: Revision,
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42 p2r: Revision,
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43 ) -> PyResult<Rank> {
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44 node_rank(&pyindex_to_graph(py, index)?, &Parents([p1r, p2r]))
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45 .map_err(|e| GraphError::pynew_from_vcsgraph(py, e))
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46 }
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47
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48 /// Create the module, with `__package__` given from parent
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49 pub fn init_module(py: Python, package: &str) -> PyResult<PyModule> {
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50 let dotted_name = &format!("{}.dagop", package);
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51 let m = PyModule::new(py, dotted_name)?;
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52 m.add(py, "__package__", package)?;
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53 m.add(py, "__doc__", "DAG operations - Rust implementation")?;
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54 m.add(
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55 py,
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56 "headrevs",
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57 py_fn!(py, headrevs(index: PyObject, revs: PyObject)),
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58 )?;
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59 m.add(
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60 py,
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61 "rank",
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62 py_fn!(py, rank(index: PyObject, p1r: Revision, p2r: Revision)),
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63 )?;
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64
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65 let sys = PyModule::import(py, "sys")?;
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66 let sys_modules: PyDict = sys.get(py, "modules")?.extract(py)?;
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67 sys_modules.set_item(py, dotted_name, &m)?;
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68 // Example C code (see pyexpat.c and import.c) will "give away the
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69 // reference", but we won't because it will be consumed once the
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70 // Rust PyObject is dropped.
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71 Ok(m)
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72 }