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annotate rust/hg-core/src/lib.rs @ 44142:63db6657d280

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rust-nodemap: building blocks for nodetree structures This is similar to `nodetreenode` in `revlog.c`. We give it a higher level feeling for ease of handling in Rust context and provide tools for tests and debugging. The encoding choice is dictated by our ultimate goal in this series, that is to make an append-only persistent version of `nodetree`: the 0th Block must be adressed from other Blocks. Differential Revision: https://phab.mercurial-scm.org/D7787
author Georges Racinet <georges.racinet@octobus.net>
date Wed, 22 Jan 2020 16:23:29 +0100
parents 6b332c1fc7fe
children 934a79697c36 df5dfee8cfb4
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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;
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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 ConsecutiveSlashes,
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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 use crate::DirstateMapError::*;
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88 match self {
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89 PathNotFound(_) => "expected a value, found none".to_string(),
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90 EmptyPath => "Overflow in dirstate.".to_string(),
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91 ConsecutiveSlashes => {
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92 "found invalid consecutive slashes in path".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
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98 pub enum DirstateError {
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99 Parse(DirstateParseError),
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100 Pack(DirstatePackError),
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101 Map(DirstateMapError),
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102 IO(std::io::Error),
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103 }
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104
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105 impl From<DirstateParseError> for DirstateError {
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106 fn from(e: DirstateParseError) -> Self {
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107 DirstateError::Parse(e)
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108 }
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109 }
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110
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111 impl From<DirstatePackError> for DirstateError {
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112 fn from(e: DirstatePackError) -> Self {
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113 DirstateError::Pack(e)
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114 }
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115 }
42327
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116
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117 #[derive(Debug)]
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118 pub enum PatternError {
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119 UnsupportedSyntax(String),
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120 }
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121
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122 #[derive(Debug)]
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123 pub enum PatternFileError {
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124 IO(std::io::Error),
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125 Pattern(PatternError, LineNumber),
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126 }
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127
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128 impl From<std::io::Error> for PatternFileError {
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129 fn from(e: std::io::Error) -> Self {
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130 PatternFileError::IO(e)
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131 }
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132 }
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133
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134 impl From<DirstateMapError> for DirstateError {
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135 fn from(e: DirstateMapError) -> Self {
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136 DirstateError::Map(e)
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137 }
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138 }
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139
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140 impl From<std::io::Error> for DirstateError {
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141 fn from(e: std::io::Error) -> Self {
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142 DirstateError::IO(e)
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143 }
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144 }