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annotate rust/hg-core/src/lib.rs @ 44208:df5dfee8cfb4 stable

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hg-core: add a compilation error if trying to compile outside of Linux For now, we can only provide support for Linux in `hg-core`, so we have to be explicit about it in case anyone wonders why their Dirstate is suddenly broken, or why the crate does not compile (on Windows for example). Differential Revision: https://phab.mercurial-scm.org/D8246
author Rapha?l Gom?s <rgomes@octobus.net>
date Fri, 06 Mar 2020 10:38:37 +0100
parents 6b332c1fc7fe
children f8427841c8fc
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 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 // Remove this to see (potential) non-artificial compile failures. MacOS
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27 // *should* compile, but fail to compile tests for example as of 2020-03-06
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28 #[cfg(not(target_os = "linux"))]
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29 compile_error!(
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30 "`hg-core` has only been tested on Linux and will most \
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31 likely not behave correctly on other platforms."
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32 );
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33
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34 use crate::utils::hg_path::HgPathBuf;
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35 pub use filepatterns::{
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36 build_single_regex, read_pattern_file, PatternSyntax, PatternTuple,
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37 };
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38 use std::collections::HashMap;
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39 use twox_hash::RandomXxHashBuilder64;
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40
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41 pub type LineNumber = usize;
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42
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43 /// Rust's default hasher is too slow because it tries to prevent collision
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44 /// attacks. We are not concerned about those: if an ill-minded person has
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45 /// write access to your repository, you have other issues.
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46 pub type FastHashMap<K, V> = HashMap<K, V, RandomXxHashBuilder64>;
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47
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48 #[derive(Clone, Debug, PartialEq)]
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49 pub enum DirstateParseError {
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50 TooLittleData,
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51 Overflow,
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52 CorruptedEntry(String),
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53 Damaged,
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54 }
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55
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56 impl From<std::io::Error> for DirstateParseError {
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57 fn from(e: std::io::Error) -> Self {
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58 DirstateParseError::CorruptedEntry(e.to_string())
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59 }
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60 }
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61
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62 impl ToString for DirstateParseError {
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63 fn to_string(&self) -> String {
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64 use crate::DirstateParseError::*;
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65 match self {
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66 TooLittleData => "Too little data for dirstate.".to_string(),
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67 Overflow => "Overflow in dirstate.".to_string(),
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68 CorruptedEntry(e) => format!("Corrupted entry: {:?}.", e),
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69 Damaged => "Dirstate appears to be damaged.".to_string(),
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70 }
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71 }
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72 }
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73
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74 #[derive(Debug, PartialEq)]
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75 pub enum DirstatePackError {
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76 CorruptedEntry(String),
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77 CorruptedParent,
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78 BadSize(usize, usize),
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79 }
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80
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81 impl From<std::io::Error> for DirstatePackError {
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82 fn from(e: std::io::Error) -> Self {
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83 DirstatePackError::CorruptedEntry(e.to_string())
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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 DirstateMapError {
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88 PathNotFound(HgPathBuf),
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89 EmptyPath,
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90 ConsecutiveSlashes,
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91 }
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92
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93 impl ToString for DirstateMapError {
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94 fn to_string(&self) -> String {
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95 use crate::DirstateMapError::*;
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96 match self {
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97 PathNotFound(_) => "expected a value, found none".to_string(),
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98 EmptyPath => "Overflow in dirstate.".to_string(),
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99 ConsecutiveSlashes => {
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100 "found invalid consecutive slashes in path".to_string()
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101 }
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102 }
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103 }
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104 }
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105
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106 pub enum DirstateError {
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107 Parse(DirstateParseError),
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108 Pack(DirstatePackError),
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109 Map(DirstateMapError),
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110 IO(std::io::Error),
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111 }
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112
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113 impl From<DirstateParseError> for DirstateError {
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114 fn from(e: DirstateParseError) -> Self {
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115 DirstateError::Parse(e)
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116 }
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117 }
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118
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119 impl From<DirstatePackError> for DirstateError {
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120 fn from(e: DirstatePackError) -> Self {
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121 DirstateError::Pack(e)
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122 }
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123 }
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124
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125 #[derive(Debug)]
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126 pub enum PatternError {
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127 UnsupportedSyntax(String),
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128 }
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129
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130 #[derive(Debug)]
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131 pub enum PatternFileError {
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132 IO(std::io::Error),
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133 Pattern(PatternError, LineNumber),
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134 }
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135
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136 impl From<std::io::Error> for PatternFileError {
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137 fn from(e: std::io::Error) -> Self {
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138 PatternFileError::IO(e)
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139 }
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140 }
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141
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142 impl From<DirstateMapError> for DirstateError {
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143 fn from(e: DirstateMapError) -> Self {
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144 DirstateError::Map(e)
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145 }
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146 }
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147
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148 impl From<std::io::Error> for DirstateError {
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149 fn from(e: std::io::Error) -> Self {
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150 DirstateError::IO(e)
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151 }
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152 }