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annotate rust/hg-core/src/lib.rs @ 46187:95d6f31e88db

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hg-core: add basic config module The config module exposes a `Config` struct, unused for now. It only reads the config file local to the repository, but handles all valid patterns and includes/unsets. It is structured in layers instead of erasing by reverse order of precedence, allowing us to transparently know more about the config for debugging purposes, and potentially other things I haven't thought about yet. This change also introduces `format_bytes!` to `hg-core`. Differential Revision: https://phab.mercurial-scm.org/D9408
author Rapha?l Gom?s <rgomes@octobus.net>
date Tue, 29 Dec 2020 10:53:45 +0100
parents 8a4914397d02
children cabc5e9366c5
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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 requirements;
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12 pub mod testing; // unconditionally built, for use from integration tests
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13 pub use dirstate::{
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14 dirs_multiset::{DirsMultiset, DirsMultisetIter},
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15 dirstate_map::DirstateMap,
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16 parsers::{pack_dirstate, parse_dirstate, PARENT_SIZE},
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17 status::{
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18 status, BadMatch, BadType, DirstateStatus, StatusError, StatusOptions,
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19 },
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20 CopyMap, CopyMapIter, DirstateEntry, DirstateParents, EntryState,
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21 StateMap, StateMapIter,
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22 };
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23 pub mod copy_tracing;
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24 mod filepatterns;
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25 pub mod matchers;
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26 pub mod repo;
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27 pub mod revlog;
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28 pub use revlog::*;
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29 pub mod config;
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30 pub mod operations;
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31 pub mod utils;
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32
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33 // Remove this to see (potential) non-artificial compile failures. MacOS
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34 // *should* compile, but fail to compile tests for example as of 2020-03-06
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35 #[cfg(not(target_os = "linux"))]
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36 compile_error!(
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37 "`hg-core` has only been tested on Linux and will most \
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38 likely not behave correctly on other platforms."
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39 );
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40
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41 use crate::utils::hg_path::{HgPathBuf, HgPathError};
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42 pub use filepatterns::{
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43 parse_pattern_syntax, read_pattern_file, IgnorePattern,
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44 PatternFileWarning, PatternSyntax,
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45 };
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46 use std::collections::HashMap;
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47 use twox_hash::RandomXxHashBuilder64;
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48
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49 /// This is a contract between the `micro-timer` crate and us, to expose
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50 /// the `log` crate as `crate::log`.
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51 use log;
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52
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53 pub type LineNumber = usize;
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54
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55 /// Rust's default hasher is too slow because it tries to prevent collision
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56 /// attacks. We are not concerned about those: if an ill-minded person has
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57 /// write access to your repository, you have other issues.
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58 pub type FastHashMap<K, V> = HashMap<K, V, RandomXxHashBuilder64>;
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59
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60 #[derive(Clone, Debug, PartialEq)]
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61 pub enum DirstateParseError {
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62 TooLittleData,
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63 Overflow,
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64 // TODO refactor to use bytes instead of String
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65 CorruptedEntry(String),
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66 Damaged,
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67 }
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68
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69 impl From<std::io::Error> for DirstateParseError {
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70 fn from(e: std::io::Error) -> Self {
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71 DirstateParseError::CorruptedEntry(e.to_string())
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72 }
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73 }
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74
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75 impl ToString for DirstateParseError {
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76 fn to_string(&self) -> String {
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77 use crate::DirstateParseError::*;
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78 match self {
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79 TooLittleData => "Too little data for dirstate.".to_string(),
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80 Overflow => "Overflow in dirstate.".to_string(),
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81 CorruptedEntry(e) => format!("Corrupted entry: {:?}.", e),
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82 Damaged => "Dirstate appears to be damaged.".to_string(),
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83 }
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84 }
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85 }
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86
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87 #[derive(Debug, PartialEq)]
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88 pub enum DirstatePackError {
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89 CorruptedEntry(String),
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90 CorruptedParent,
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91 BadSize(usize, usize),
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92 }
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93
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94 impl From<std::io::Error> for DirstatePackError {
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95 fn from(e: std::io::Error) -> Self {
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96 DirstatePackError::CorruptedEntry(e.to_string())
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97 }
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98 }
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99 #[derive(Debug, PartialEq)]
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100 pub enum DirstateMapError {
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101 PathNotFound(HgPathBuf),
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102 EmptyPath,
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103 InvalidPath(HgPathError),
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104 }
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105
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106 impl ToString for DirstateMapError {
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107 fn to_string(&self) -> String {
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108 match self {
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109 DirstateMapError::PathNotFound(_) => {
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110 "expected a value, found none".to_string()
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111 }
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112 DirstateMapError::EmptyPath => "Overflow in dirstate.".to_string(),
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113 DirstateMapError::InvalidPath(e) => e.to_string(),
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114 }
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115 }
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116 }
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117
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118 #[derive(Debug)]
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119 pub enum DirstateError {
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120 Parse(DirstateParseError),
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121 Pack(DirstatePackError),
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122 Map(DirstateMapError),
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123 IO(std::io::Error),
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124 }
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125
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126 impl From<DirstateParseError> for DirstateError {
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127 fn from(e: DirstateParseError) -> Self {
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128 DirstateError::Parse(e)
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129 }
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130 }
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131
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132 impl From<DirstatePackError> for DirstateError {
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133 fn from(e: DirstatePackError) -> Self {
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134 DirstateError::Pack(e)
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135 }
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136 }
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137
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138 #[derive(Debug)]
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139 pub enum PatternError {
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140 Path(HgPathError),
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141 UnsupportedSyntax(String),
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142 UnsupportedSyntaxInFile(String, String, usize),
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143 TooLong(usize),
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144 IO(std::io::Error),
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145 /// Needed a pattern that can be turned into a regex but got one that
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146 /// can't. This should only happen through programmer error.
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147 NonRegexPattern(IgnorePattern),
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148 }
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149
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150 impl ToString for PatternError {
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151 fn to_string(&self) -> String {
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152 match self {
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153 PatternError::UnsupportedSyntax(syntax) => {
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154 format!("Unsupported syntax {}", syntax)
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155 }
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156 PatternError::UnsupportedSyntaxInFile(syntax, file_path, line) => {
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157 format!(
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158 "{}:{}: unsupported syntax {}",
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159 file_path, line, syntax
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160 )
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161 }
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162 PatternError::TooLong(size) => {
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163 format!("matcher pattern is too long ({} bytes)", size)
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164 }
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165 PatternError::IO(e) => e.to_string(),
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166 PatternError::Path(e) => e.to_string(),
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167 PatternError::NonRegexPattern(pattern) => {
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168 format!("'{:?}' cannot be turned into a regex", pattern)
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169 }
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170 }
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171 }
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172 }
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173
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174 impl From<DirstateMapError> for DirstateError {
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175 fn from(e: DirstateMapError) -> Self {
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176 DirstateError::Map(e)
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177 }
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178 }
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179
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180 impl From<std::io::Error> for DirstateError {
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181 fn from(e: std::io::Error) -> Self {
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182 DirstateError::IO(e)
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183 }
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184 }
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185
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186 impl From<std::io::Error> for PatternError {
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187 fn from(e: std::io::Error) -> Self {
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188 PatternError::IO(e)
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189 }
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190 }
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191
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192 impl From<HgPathError> for PatternError {
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193 fn from(e: HgPathError) -> Self {
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194 PatternError::Path(e)
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195 }
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196 }