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annotate rust/hg-cpython/src/lib.rs @ 51197:bc4d83047c6c

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rust-index: helper for revision not in index not involving nodemap This is a good match for exceptions raised from the C implementation, when it is not about a nodemap inconsistency.
author Georges Racinet <georges.racinet@octobus.net>
date Wed, 27 Sep 2023 10:59:04 +0200
parents 4c5f6e95df84
children 8b7123c8947b
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1 // lib.rs
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2 //
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3 // Copyright 2018 Georges Racinet <gracinet@anybox.fr>
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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 //! Python bindings of `hg-core` objects using the `cpython` crate.
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9 //! Once compiled, the resulting single shared library object can be placed in
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10 //! the `mercurial` package directly as `rustext.so` or `rustext.dll`.
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11 //! It holds several modules, so that from the point of view of Python,
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12 //! it behaves as the `cext` package.
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13 //!
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14 //! Example:
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15 //!
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16 //! ```text
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17 //! >>> from mercurial.rustext import ancestor
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18 //! >>> ancestor.__doc__
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19 //! 'Generic DAG ancestor algorithms - Rust implementation'
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20 //! ```
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21 #![allow(clippy::too_many_arguments)] // rust-cpython macros
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22 #![allow(clippy::zero_ptr)] // rust-cpython macros
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23 #![allow(clippy::needless_update)] // rust-cpython macros
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24 #![allow(clippy::manual_strip)] // rust-cpython macros
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25 #![allow(clippy::type_complexity)] // rust-cpython macros
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26
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27 use cpython::{FromPyObject, PyInt, Python, ToPyObject};
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28 use hg::{BaseRevision, Revision};
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29
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30 /// This crate uses nested private macros, `extern crate` is still needed in
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31 /// 2018 edition.
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32 #[macro_use]
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33 extern crate cpython;
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34
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35 pub mod ancestors;
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36 mod cindex;
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37 mod conversion;
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38 #[macro_use]
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39 pub mod ref_sharing;
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40 pub mod copy_tracing;
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41 pub mod dagops;
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42 pub mod debug;
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43 pub mod dirstate;
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44 pub mod discovery;
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45 pub mod exceptions;
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46 mod pybytes_deref;
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47 pub mod revlog;
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48 pub mod utils;
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49
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50 /// Revision as exposed to/from the Python layer.
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51 ///
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52 /// We need this indirection because of the orphan rule, meaning we can't
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53 /// implement a foreign trait (like [`cpython::ToPyObject`])
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54 /// for a foreign type (like [`hg::UncheckedRevision`]).
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55 ///
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56 /// This also acts as a deterrent against blindly trusting Python to send
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57 /// us valid revision numbers.
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58 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
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59 pub struct PyRevision(BaseRevision);
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60
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61 impl From<Revision> for PyRevision {
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62 fn from(r: Revision) -> Self {
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63 PyRevision(r.0)
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64 }
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65 }
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66
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67 impl<'s> FromPyObject<'s> for PyRevision {
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68 fn extract(
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69 py: Python,
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70 obj: &'s cpython::PyObject,
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71 ) -> cpython::PyResult<Self> {
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72 Ok(Self(obj.extract::<BaseRevision>(py)?))
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73 }
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74 }
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75
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76 impl ToPyObject for PyRevision {
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77 type ObjectType = PyInt;
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78
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79 fn to_py_object(&self, py: Python) -> Self::ObjectType {
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80 self.0.to_py_object(py)
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81 }
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82 }
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83
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84 py_module_initializer!(rustext, initrustext, PyInit_rustext, |py, m| {
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85 m.add(
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86 py,
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87 "__doc__",
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88 "Mercurial core concepts - Rust implementation",
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89 )?;
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90
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91 let dotted_name: String = m.get(py, "__name__")?.extract(py)?;
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92 m.add(py, "ancestor", ancestors::init_module(py, &dotted_name)?)?;
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93 m.add(py, "dagop", dagops::init_module(py, &dotted_name)?)?;
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94 m.add(py, "debug", debug::init_module(py, &dotted_name)?)?;
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95 m.add(
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96 py,
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97 "copy_tracing",
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98 copy_tracing::init_module(py, &dotted_name)?,
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99 )?;
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100 m.add(py, "discovery", discovery::init_module(py, &dotted_name)?)?;
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101 m.add(py, "dirstate", dirstate::init_module(py, &dotted_name)?)?;
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102 m.add(py, "revlog", revlog::init_module(py, &dotted_name)?)?;
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103 m.add(py, "GraphError", py.get_type::<exceptions::GraphError>())?;
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104 Ok(())
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105 });
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106
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107 #[cfg(not(feature = "python3-bin"))]
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108 #[test]
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109 #[ignore]
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110 fn libpython_must_be_linked_to_run_tests() {
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111 // stub function to tell that some tests wouldn't run
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112 }