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annotate rust/hg-core/src/lib.rs @ 44329:934a79697c36

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rust-dirs-multiset: improve temporary error message While we wait on a future patch that could verify that the paths passed to `DirsMultiset` have been audited, we still need to handle this error. This patch makes it easier to bubble up and makes the error clearer. Also, this patch introduces the `subslice_index` function that could be useful for other - albeit niche - purposes. Differential Revision: https://phab.mercurial-scm.org/D7921
author Rapha?l Gom?s <rgomes@octobus.net>
date Fri, 24 Jan 2020 11:10:07 +0100
parents 6b332c1fc7fe
children d42eea9a0494
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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 mod ancestors;
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7 pub mod dagops;
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8 pub use ancestors::{AncestorsIterator, LazyAncestors, MissingAncestors};
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9 mod dirstate;
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10 pub mod discovery;
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11 pub mod testing; // unconditionally built, for use from integration tests
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12 pub use dirstate::{
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13 dirs_multiset::{DirsMultiset, DirsMultisetIter},
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14 dirstate_map::DirstateMap,
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15 parsers::{pack_dirstate, parse_dirstate, PARENT_SIZE},
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16 status::{status, StatusResult},
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17 CopyMap, CopyMapIter, DirstateEntry, DirstateParents, EntryState,
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18 StateMap, StateMapIter,
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19 };
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20 mod filepatterns;
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21 pub mod matchers;
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22 pub mod revlog;
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23 pub use revlog::*;
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24 pub mod utils;
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25
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26 use crate::utils::hg_path::{HgPathBuf, HgPathError};
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27 pub use filepatterns::{
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28 build_single_regex, read_pattern_file, PatternSyntax, PatternTuple,
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29 };
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30 use std::collections::HashMap;
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31 use twox_hash::RandomXxHashBuilder64;
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32
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33 pub type LineNumber = usize;
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34
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35 /// Rust's default hasher is too slow because it tries to prevent collision
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36 /// attacks. We are not concerned about those: if an ill-minded person has
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37 /// write access to your repository, you have other issues.
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38 pub type FastHashMap<K, V> = HashMap<K, V, RandomXxHashBuilder64>;
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39
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40 #[derive(Clone, Debug, PartialEq)]
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41 pub enum DirstateParseError {
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42 TooLittleData,
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43 Overflow,
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44 CorruptedEntry(String),
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45 Damaged,
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46 }
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47
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48 impl From<std::io::Error> for DirstateParseError {
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49 fn from(e: std::io::Error) -> Self {
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50 DirstateParseError::CorruptedEntry(e.to_string())
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51 }
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52 }
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53
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54 impl ToString for DirstateParseError {
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55 fn to_string(&self) -> String {
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56 use crate::DirstateParseError::*;
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57 match self {
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58 TooLittleData => "Too little data for dirstate.".to_string(),
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59 Overflow => "Overflow in dirstate.".to_string(),
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60 CorruptedEntry(e) => format!("Corrupted entry: {:?}.", e),
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61 Damaged => "Dirstate appears to be damaged.".to_string(),
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62 }
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63 }
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64 }
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65
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66 #[derive(Debug, PartialEq)]
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67 pub enum DirstatePackError {
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68 CorruptedEntry(String),
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69 CorruptedParent,
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70 BadSize(usize, usize),
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71 }
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72
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73 impl From<std::io::Error> for DirstatePackError {
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74 fn from(e: std::io::Error) -> Self {
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75 DirstatePackError::CorruptedEntry(e.to_string())
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76 }
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77 }
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78 #[derive(Debug, PartialEq)]
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79 pub enum DirstateMapError {
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80 PathNotFound(HgPathBuf),
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81 EmptyPath,
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82 InvalidPath(HgPathError),
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83 }
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84
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85 impl ToString for DirstateMapError {
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86 fn to_string(&self) -> String {
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87 match self {
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88 DirstateMapError::PathNotFound(_) => {
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89 "expected a value, found none".to_string()
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90 }
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91 DirstateMapError::EmptyPath => "Overflow in dirstate.".to_string(),
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92 DirstateMapError::InvalidPath(e) => e.to_string(),
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93 }
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94 }
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95 }
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96
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97 pub enum DirstateError {
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98 Parse(DirstateParseError),
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99 Pack(DirstatePackError),
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100 Map(DirstateMapError),
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101 IO(std::io::Error),
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102 }
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103
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104 impl From<DirstateParseError> for DirstateError {
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105 fn from(e: DirstateParseError) -> Self {
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106 DirstateError::Parse(e)
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107 }
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108 }
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109
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110 impl From<DirstatePackError> for DirstateError {
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111 fn from(e: DirstatePackError) -> Self {
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112 DirstateError::Pack(e)
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113 }
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114 }
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115
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116 #[derive(Debug)]
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117 pub enum PatternError {
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118 UnsupportedSyntax(String),
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119 }
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120
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121 #[derive(Debug)]
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122 pub enum PatternFileError {
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123 IO(std::io::Error),
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124 Pattern(PatternError, LineNumber),
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125 }
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126
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127 impl From<std::io::Error> for PatternFileError {
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128 fn from(e: std::io::Error) -> Self {
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129 PatternFileError::IO(e)
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130 }
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131 }
42765
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132
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133 impl From<DirstateMapError> for DirstateError {
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134 fn from(e: DirstateMapError) -> Self {
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135 DirstateError::Map(e)
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136 }
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137 }
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138
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139 impl From<std::io::Error> for DirstateError {
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140 fn from(e: std::io::Error) -> Self {
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141 DirstateError::IO(e)
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142 }
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143 }