annotate rust/hg-core/src/lib.rs @ 46167:8a4914397d02

rust: introduce Repo and Vfs types for filesystem abstraction This is similar to the corresponding Python classes. Repo represents a repository and knows the path to the `.hg` directory, the `store` directory, and the working directory. Separating these will enable supporting the share extension. A Vfs is created from a Repo for one of these three directories. It has filesystem access APIs that take a relative std::path::Path as a parameter. Differential Revision: https://phab.mercurial-scm.org/D9596
author Simon Sapin <simon.sapin@octobus.net>
date Mon, 14 Dec 2020 16:33:15 +0100
parents 595979dc924e
children 95d6f31e88db
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 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 operations;
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30 pub mod utils;
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31
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32 // Remove this to see (potential) non-artificial compile failures. MacOS
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33 // *should* compile, but fail to compile tests for example as of 2020-03-06
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34 #[cfg(not(target_os = "linux"))]
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35 compile_error!(
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36 "`hg-core` has only been tested on Linux and will most \
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37 likely not behave correctly on other platforms."
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38 );
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39
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40 use crate::utils::hg_path::{HgPathBuf, HgPathError};
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41 pub use filepatterns::{
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42 parse_pattern_syntax, read_pattern_file, IgnorePattern,
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43 PatternFileWarning, PatternSyntax,
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44 };
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45 use std::collections::HashMap;
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46 use twox_hash::RandomXxHashBuilder64;
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47
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48 /// This is a contract between the `micro-timer` crate and us, to expose
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49 /// the `log` crate as `crate::log`.
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50 use log;
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51
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52 pub type LineNumber = usize;
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53
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54 /// Rust's default hasher is too slow because it tries to prevent collision
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55 /// attacks. We are not concerned about those: if an ill-minded person has
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56 /// write access to your repository, you have other issues.
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57 pub type FastHashMap<K, V> = HashMap<K, V, RandomXxHashBuilder64>;
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58
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59 #[derive(Clone, Debug, PartialEq)]
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60 pub enum DirstateParseError {
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61 TooLittleData,
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62 Overflow,
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63 // TODO refactor to use bytes instead of String
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64 CorruptedEntry(String),
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65 Damaged,
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66 }
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67
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68 impl From<std::io::Error> for DirstateParseError {
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69 fn from(e: std::io::Error) -> Self {
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70 DirstateParseError::CorruptedEntry(e.to_string())
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71 }
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72 }
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73
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74 impl ToString for DirstateParseError {
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75 fn to_string(&self) -> String {
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76 use crate::DirstateParseError::*;
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77 match self {
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78 TooLittleData => "Too little data for dirstate.".to_string(),
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79 Overflow => "Overflow in dirstate.".to_string(),
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80 CorruptedEntry(e) => format!("Corrupted entry: {:?}.", e),
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81 Damaged => "Dirstate appears to be damaged.".to_string(),
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82 }
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83 }
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84 }
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85
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86 #[derive(Debug, PartialEq)]
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87 pub enum DirstatePackError {
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88 CorruptedEntry(String),
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89 CorruptedParent,
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90 BadSize(usize, usize),
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91 }
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92
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93 impl From<std::io::Error> for DirstatePackError {
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94 fn from(e: std::io::Error) -> Self {
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95 DirstatePackError::CorruptedEntry(e.to_string())
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96 }
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97 }
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98 #[derive(Debug, PartialEq)]
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99 pub enum DirstateMapError {
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100 PathNotFound(HgPathBuf),
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101 EmptyPath,
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102 InvalidPath(HgPathError),
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103 }
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104
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105 impl ToString for DirstateMapError {
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106 fn to_string(&self) -> String {
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107 match self {
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108 DirstateMapError::PathNotFound(_) => {
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109 "expected a value, found none".to_string()
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110 }
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111 DirstateMapError::EmptyPath => "Overflow in dirstate.".to_string(),
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112 DirstateMapError::InvalidPath(e) => e.to_string(),
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113 }
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114 }
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115 }
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116
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117 #[derive(Debug)]
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118 pub enum DirstateError {
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119 Parse(DirstateParseError),
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120 Pack(DirstatePackError),
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121 Map(DirstateMapError),
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122 IO(std::io::Error),
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123 }
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124
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125 impl From<DirstateParseError> for DirstateError {
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126 fn from(e: DirstateParseError) -> Self {
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127 DirstateError::Parse(e)
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128 }
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129 }
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130
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131 impl From<DirstatePackError> for DirstateError {
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132 fn from(e: DirstatePackError) -> Self {
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133 DirstateError::Pack(e)
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134 }
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135 }
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136
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137 #[derive(Debug)]
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138 pub enum PatternError {
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139 Path(HgPathError),
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140 UnsupportedSyntax(String),
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141 UnsupportedSyntaxInFile(String, String, usize),
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142 TooLong(usize),
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143 IO(std::io::Error),
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144 /// Needed a pattern that can be turned into a regex but got one that
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145 /// can't. This should only happen through programmer error.
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146 NonRegexPattern(IgnorePattern),
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147 }
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148
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149 impl ToString for PatternError {
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150 fn to_string(&self) -> String {
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151 match self {
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152 PatternError::UnsupportedSyntax(syntax) => {
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153 format!("Unsupported syntax {}", syntax)
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154 }
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155 PatternError::UnsupportedSyntaxInFile(syntax, file_path, line) => {
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156 format!(
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157 "{}:{}: unsupported syntax {}",
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158 file_path, line, syntax
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159 )
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160 }
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161 PatternError::TooLong(size) => {
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162 format!("matcher pattern is too long ({} bytes)", size)
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163 }
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164 PatternError::IO(e) => e.to_string(),
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165 PatternError::Path(e) => e.to_string(),
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166 PatternError::NonRegexPattern(pattern) => {
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167 format!("'{:?}' cannot be turned into a regex", pattern)
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168 }
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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 impl From<DirstateMapError> for DirstateError {
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174 fn from(e: DirstateMapError) -> Self {
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175 DirstateError::Map(e)
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176 }
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177 }
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178
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179 impl From<std::io::Error> for DirstateError {
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180 fn from(e: std::io::Error) -> Self {
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181 DirstateError::IO(e)
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182 }
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183 }
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184
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185 impl From<std::io::Error> for PatternError {
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186 fn from(e: std::io::Error) -> Self {
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187 PatternError::IO(e)
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188 }
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189 }
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190
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191 impl From<HgPathError> for PatternError {
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192 fn from(e: HgPathError) -> Self {
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193 PatternError::Path(e)
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194 }
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195 }