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annotate rust/hg-core/src/lib.rs @ 52290:e01e84e5e426

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rust-revlog: add a Rust-only `InnerRevlog` This mirrors the Python `InnerRevlog` and will be used in a future patch to replace said Python implementation. This allows us to start doing more things in pure Rust, in particular reading and writing operations. A lot of changes have to be introduced all at once, it wouldn't be very useful to separate this patch IMO since all of them are either interlocked or only useful with the rest.
author Rapha?l Gom?s <rgomes@octobus.net>
date Thu, 10 Oct 2024 10:34:51 +0200
parents 8b7123c8947b
children 1a8466fd904a
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 dirstate_tree;
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15 pub mod discovery;
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16 pub mod exit_codes;
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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 pub use revlog::*;
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33 pub mod checkexec;
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34 pub mod config;
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35 pub mod lock;
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36 pub mod logging;
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37 pub mod operations;
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38 pub mod progress;
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39 pub mod revset;
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40 pub mod transaction;
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41 pub mod update;
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42 pub mod utils;
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43 pub mod vfs;
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44
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45 use crate::utils::hg_path::{HgPathBuf, HgPathError};
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46 pub use filepatterns::{
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47 parse_pattern_syntax_kind, read_pattern_file, IgnorePattern,
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48 PatternFileWarning, PatternSyntax,
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49 };
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50 use std::collections::HashMap;
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51 use std::fmt;
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52 use twox_hash::RandomXxHashBuilder64;
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53
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54 pub type LineNumber = usize;
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55
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56 /// Rust's default hasher is too slow because it tries to prevent collision
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57 /// attacks. We are not concerned about those: if an ill-minded person has
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58 /// write access to your repository, you have other issues.
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59 pub type FastHashMap<K, V> = HashMap<K, V, RandomXxHashBuilder64>;
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60
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61 // TODO: should this be the default `FastHashMap` for all of hg-core, not just
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62 // dirstate_tree? How does XxHash compare with AHash, hashbrown’s default?
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63 pub type FastHashbrownMap<K, V> =
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64 hashbrown::HashMap<K, V, RandomXxHashBuilder64>;
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65
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66 #[derive(Debug, PartialEq)]
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67 pub enum DirstateMapError {
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68 PathNotFound(HgPathBuf),
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69 InvalidPath(HgPathError),
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70 }
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71
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72 impl From<HgPathError> for DirstateMapError {
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73 fn from(error: HgPathError) -> Self {
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74 Self::InvalidPath(error)
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75 }
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76 }
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77
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78 impl fmt::Display for DirstateMapError {
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79 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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80 match self {
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81 DirstateMapError::PathNotFound(_) => {
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82 f.write_str("expected a value, found none")
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83 }
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84 DirstateMapError::InvalidPath(path_error) => path_error.fmt(f),
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85 }
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86 }
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87 }
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88
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89 #[derive(Debug, derive_more::From)]
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90 pub enum DirstateError {
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91 Map(DirstateMapError),
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92 Common(errors::HgError),
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93 }
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94
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95 impl From<HgPathError> for DirstateError {
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96 fn from(error: HgPathError) -> Self {
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97 Self::Map(DirstateMapError::InvalidPath(error))
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98 }
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99 }
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100
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101 impl fmt::Display for DirstateError {
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102 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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103 match self {
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104 DirstateError::Map(error) => error.fmt(f),
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105 DirstateError::Common(error) => error.fmt(f),
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106 }
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107 }
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108 }
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109
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110 #[derive(Debug, derive_more::From)]
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111 pub enum PatternError {
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112 #[from]
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113 Path(HgPathError),
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114 UnsupportedSyntax(String),
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115 UnsupportedSyntaxInFile(String, String, usize),
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116 TooLong(usize),
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117 #[from]
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118 IO(std::io::Error),
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119 /// Needed a pattern that can be turned into a regex but got one that
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120 /// can't. This should only happen through programmer error.
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121 NonRegexPattern(IgnorePattern),
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122 }
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123
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124 impl fmt::Display for PatternError {
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125 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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126 match self {
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127 PatternError::UnsupportedSyntax(syntax) => {
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128 write!(f, "Unsupported syntax {}", syntax)
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129 }
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130 PatternError::UnsupportedSyntaxInFile(syntax, file_path, line) => {
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131 write!(
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132 f,
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133 "{}:{}: unsupported syntax {}",
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134 file_path, line, syntax
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135 )
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136 }
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137 PatternError::TooLong(size) => {
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138 write!(f, "matcher pattern is too long ({} bytes)", size)
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139 }
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140 PatternError::IO(error) => error.fmt(f),
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141 PatternError::Path(error) => error.fmt(f),
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142 PatternError::NonRegexPattern(pattern) => {
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143 write!(f, "'{:?}' cannot be turned into a regex", pattern)
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144 }
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145 }
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146 }
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147 }