Mercurial > hg
annotate rust/hg-core/src/lib.rs @ 50660:bf16ef96defe stable
rust-dirstate: fall back to v1 if reading v2 failed
This will help us not fail when a v1 dirstate is present on disk while a v2
was expected (which could happen with a racy/interrupted upgrade).
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Mon, 05 Jun 2023 16:43:27 +0200 |
parents | c15b415d1bff |
children | a8531bd9210b |
rev | line source |
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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 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 revset; |
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39 pub mod utils; |
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40 pub mod vfs; |
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41 |
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42 use crate::utils::hg_path::{HgPathBuf, HgPathError}; |
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43 pub use filepatterns::{ |
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44 parse_pattern_syntax, read_pattern_file, IgnorePattern, |
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45 PatternFileWarning, PatternSyntax, |
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46 }; |
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47 use std::collections::HashMap; |
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48 use std::fmt; |
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49 use twox_hash::RandomXxHashBuilder64; |
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50 |
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51 pub type LineNumber = usize; |
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52 |
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53 /// Rust's default hasher is too slow because it tries to prevent collision |
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54 /// attacks. We are not concerned about those: if an ill-minded person has |
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55 /// write access to your repository, you have other issues. |
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56 pub type FastHashMap<K, V> = HashMap<K, V, RandomXxHashBuilder64>; |
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57 |
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58 // TODO: should this be the default `FastHashMap` for all of hg-core, not just |
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59 // dirstate_tree? How does XxHash compare with AHash, hashbrown’s default? |
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60 pub type FastHashbrownMap<K, V> = |
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61 hashbrown::HashMap<K, V, RandomXxHashBuilder64>; |
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62 |
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63 #[derive(Debug, PartialEq)] |
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64 pub enum DirstateMapError { |
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65 PathNotFound(HgPathBuf), |
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66 EmptyPath, |
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67 InvalidPath(HgPathError), |
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68 } |
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69 |
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70 impl fmt::Display for DirstateMapError { |
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71 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
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72 match self { |
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73 DirstateMapError::PathNotFound(_) => { |
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74 f.write_str("expected a value, found none") |
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75 } |
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76 DirstateMapError::EmptyPath => { |
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77 f.write_str("Overflow in dirstate.") |
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78 } |
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79 DirstateMapError::InvalidPath(path_error) => path_error.fmt(f), |
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80 } |
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81 } |
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82 } |
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83 |
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84 #[derive(Debug, derive_more::From)] |
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85 pub enum DirstateError { |
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86 Map(DirstateMapError), |
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87 Common(errors::HgError), |
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88 } |
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89 |
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90 impl fmt::Display for DirstateError { |
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91 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
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92 match self { |
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93 DirstateError::Map(error) => error.fmt(f), |
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94 DirstateError::Common(error) => error.fmt(f), |
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95 } |
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96 } |
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97 } |
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98 |
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99 #[derive(Debug, derive_more::From)] |
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100 pub enum PatternError { |
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101 #[from] |
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102 Path(HgPathError), |
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103 UnsupportedSyntax(String), |
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104 UnsupportedSyntaxInFile(String, String, usize), |
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105 TooLong(usize), |
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106 #[from] |
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107 IO(std::io::Error), |
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108 /// Needed a pattern that can be turned into a regex but got one that |
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109 /// can't. This should only happen through programmer error. |
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110 NonRegexPattern(IgnorePattern), |
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111 } |
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112 |
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113 impl fmt::Display for PatternError { |
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114 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
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115 match self { |
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116 PatternError::UnsupportedSyntax(syntax) => { |
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117 write!(f, "Unsupported syntax {}", syntax) |
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118 } |
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119 PatternError::UnsupportedSyntaxInFile(syntax, file_path, line) => { |
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120 write!( |
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121 f, |
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122 "{}:{}: unsupported syntax {}", |
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123 file_path, line, syntax |
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124 ) |
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125 } |
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126 PatternError::TooLong(size) => { |
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127 write!(f, "matcher pattern is too long ({} bytes)", size) |
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128 } |
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129 PatternError::IO(error) => error.fmt(f), |
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130 PatternError::Path(error) => error.fmt(f), |
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131 PatternError::NonRegexPattern(pattern) => { |
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132 write!(f, "'{:?}' cannot be turned into a regex", pattern) |
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133 } |
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134 } |
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135 } |
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136 } |