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annotate rust/hg-core/src/lib.rs @ 52334:db065b33fa56

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rust-dirstate: merge `dirstate_tree` module into `dirstate` The historical reasonning for `dirstate_tree` existing in the first place is that a new approach was needed for the tree-like dirstate and it was easier to start somewhat fresh. Now that the former dirstate is (long) gone, we can merge those two modules to avoid the confusion that even the module creators sometimes get.
author Rapha?l Gom?s <rgomes@octobus.net>
date Mon, 04 Nov 2024 11:00:58 +0100
parents 65d516db7309
children b422acba55f1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 // Copyright 2018-2020 Georges Racinet <georges.racinet@octobus.net>
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2 // and Mercurial contributors
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3 //
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4 // This software may be used and distributed according to the terms of the
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5 // GNU General Public License version 2 or any later version.
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6
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7 mod ancestors;
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8 pub mod dagops;
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9 pub mod errors;
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10 pub mod narrow;
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11 pub mod sparse;
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12 pub use ancestors::{AncestorsIterator, MissingAncestors};
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13 pub mod dirstate;
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14 pub mod discovery;
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15 pub mod exit_codes;
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16 pub mod fncache;
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17 pub mod requirements;
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18 pub mod testing; // unconditionally built, for use from integration tests
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19 pub use dirstate::{
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20 dirs_multiset::{DirsMultiset, DirsMultisetIter},
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21 status::{
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22 BadMatch, BadType, DirstateStatus, HgPathCow, StatusError,
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23 StatusOptions,
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24 },
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25 DirstateEntry, DirstateParents, EntryState,
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26 };
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27 pub mod copy_tracing;
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28 pub mod filepatterns;
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29 pub mod matchers;
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30 pub mod repo;
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31 pub mod revlog;
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32 // Export very common types to make discovery easier
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33 pub use revlog::{
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34 BaseRevision, Graph, GraphError, Node, NodePrefix, Revision,
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35 UncheckedRevision, NULL_NODE, NULL_NODE_ID, NULL_REVISION,
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36 WORKING_DIRECTORY_HEX, WORKING_DIRECTORY_REVISION,
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37 };
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38 pub mod checkexec;
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39 pub mod config;
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40 pub mod lock;
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41 pub mod logging;
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42 pub mod operations;
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43 pub mod progress;
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44 pub mod revset;
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45 pub mod transaction;
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46 pub mod update;
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47 pub mod utils;
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48 pub mod vfs;
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49
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50 use crate::utils::hg_path::{HgPathBuf, HgPathError};
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51 pub use filepatterns::{
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52 parse_pattern_syntax_kind, read_pattern_file, IgnorePattern,
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53 PatternFileWarning, PatternSyntax,
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54 };
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55 use std::fmt;
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56 use std::{collections::HashMap, sync::atomic::AtomicBool};
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57 use twox_hash::RandomXxHashBuilder64;
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58
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59 /// Used to communicate with threads spawned from code within this crate that
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60 /// they should stop their work (SIGINT was received).
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61 pub static INTERRUPT_RECEIVED: AtomicBool = AtomicBool::new(false);
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62
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63 pub type LineNumber = usize;
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64
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65 /// Rust's default hasher is too slow because it tries to prevent collision
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66 /// attacks. We are not concerned about those: if an ill-minded person has
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67 /// write access to your repository, you have other issues.
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68 pub type FastHashMap<K, V> = HashMap<K, V, RandomXxHashBuilder64>;
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69
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70 // TODO: should this be the default `FastHashMap` for all of hg-core, not just
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71 // dirstate? How does XxHash compare with AHash, hashbrown’s default?
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72 pub type FastHashbrownMap<K, V> =
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73 hashbrown::HashMap<K, V, RandomXxHashBuilder64>;
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74
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75 #[derive(Debug, PartialEq)]
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76 pub enum DirstateMapError {
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77 PathNotFound(HgPathBuf),
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78 InvalidPath(HgPathError),
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79 }
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80
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81 impl From<HgPathError> for DirstateMapError {
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82 fn from(error: HgPathError) -> Self {
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83 Self::InvalidPath(error)
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84 }
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85 }
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86
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87 impl fmt::Display for DirstateMapError {
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88 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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89 match self {
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90 DirstateMapError::PathNotFound(_) => {
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91 f.write_str("expected a value, found none")
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92 }
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93 DirstateMapError::InvalidPath(path_error) => path_error.fmt(f),
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94 }
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95 }
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96 }
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97
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98 #[derive(Debug, derive_more::From)]
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99 pub enum DirstateError {
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100 Map(DirstateMapError),
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101 Common(errors::HgError),
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102 }
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103
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104 impl From<HgPathError> for DirstateError {
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105 fn from(error: HgPathError) -> Self {
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106 Self::Map(DirstateMapError::InvalidPath(error))
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107 }
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108 }
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109
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110 impl fmt::Display for DirstateError {
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111 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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112 match self {
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113 DirstateError::Map(error) => error.fmt(f),
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114 DirstateError::Common(error) => error.fmt(f),
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115 }
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116 }
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117 }
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118
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119 #[derive(Debug, derive_more::From)]
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120 pub enum PatternError {
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121 #[from]
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122 Path(HgPathError),
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123 UnsupportedSyntax(String),
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124 UnsupportedSyntaxInFile(String, String, usize),
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125 TooLong(usize),
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126 #[from]
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127 IO(std::io::Error),
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128 /// Needed a pattern that can be turned into a regex but got one that
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129 /// can't. This should only happen through programmer error.
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130 NonRegexPattern(IgnorePattern),
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131 }
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132
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133 impl fmt::Display for PatternError {
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134 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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135 match self {
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136 PatternError::UnsupportedSyntax(syntax) => {
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137 write!(f, "Unsupported syntax {}", syntax)
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138 }
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139 PatternError::UnsupportedSyntaxInFile(syntax, file_path, line) => {
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140 write!(
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141 f,
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142 "{}:{}: unsupported syntax {}",
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143 file_path, line, syntax
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144 )
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145 }
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146 PatternError::TooLong(size) => {
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147 write!(f, "matcher pattern is too long ({} bytes)", size)
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148 }
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149 PatternError::IO(error) => error.fmt(f),
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150 PatternError::Path(error) => error.fmt(f),
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151 PatternError::NonRegexPattern(pattern) => {
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152 write!(f, "'{:?}' cannot be turned into a regex", pattern)
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153 }
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154 }
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155 }
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156 }