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annotate rust/hg-core/src/lib.rs @ 52065:3ae7c43ad8aa

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rust: add `Progress` trait for progress bars This will be used in the next few changes to introduce a progress bar for the `hg update` fastpath.
author Rapha?l Gom?s <rgomes@octobus.net>
date Mon, 30 Sep 2024 16:02:30 +0200
parents e4b9f8a74d5f
children 8b7123c8947b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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cb2e2b095dc9 rust-core: updated copyright notice
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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
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7 mod ancestors;
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8 pub mod dagops;
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9 pub mod errors;
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10 pub mod narrow;
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11 pub mod sparse;
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12 pub use ancestors::{AncestorsIterator, MissingAncestors};
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13 pub mod dirstate;
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14 pub mod dirstate_tree;
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15 pub mod discovery;
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16 pub mod exit_codes;
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17 pub mod requirements;
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18 pub mod testing; // unconditionally built, for use from integration tests
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19 pub use dirstate::{
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20 dirs_multiset::{DirsMultiset, DirsMultisetIter},
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21 status::{
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22 BadMatch, BadType, DirstateStatus, HgPathCow, StatusError,
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23 StatusOptions,
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24 },
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25 DirstateEntry, DirstateParents, EntryState,
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26 };
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27 pub mod copy_tracing;
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28 pub mod filepatterns;
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29 pub mod matchers;
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30 pub mod repo;
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31 pub mod revlog;
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32 pub use revlog::*;
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33 pub mod checkexec;
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34 pub mod config;
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35 pub mod lock;
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36 pub mod logging;
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37 pub mod operations;
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38 pub mod progress;
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39 pub mod revset;
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40 pub mod utils;
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41 pub mod vfs;
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42
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43 use crate::utils::hg_path::{HgPathBuf, HgPathError};
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44 pub use filepatterns::{
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45 parse_pattern_syntax_kind, read_pattern_file, IgnorePattern,
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46 PatternFileWarning, PatternSyntax,
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47 };
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48 use std::collections::HashMap;
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49 use std::fmt;
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50 use twox_hash::RandomXxHashBuilder64;
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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 // TODO: should this be the default `FastHashMap` for all of hg-core, not just
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60 // dirstate_tree? How does XxHash compare with AHash, hashbrown’s default?
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61 pub type FastHashbrownMap<K, V> =
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62 hashbrown::HashMap<K, V, RandomXxHashBuilder64>;
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63
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64 #[derive(Debug, PartialEq)]
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65 pub enum DirstateMapError {
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66 PathNotFound(HgPathBuf),
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67 InvalidPath(HgPathError),
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68 }
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69
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70 impl From<HgPathError> for DirstateMapError {
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71 fn from(error: HgPathError) -> Self {
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72 Self::InvalidPath(error)
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73 }
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74 }
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75
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76 impl fmt::Display for DirstateMapError {
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77 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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78 match self {
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79 DirstateMapError::PathNotFound(_) => {
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80 f.write_str("expected a value, found none")
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81 }
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82 DirstateMapError::InvalidPath(path_error) => path_error.fmt(f),
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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, derive_more::From)]
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88 pub enum DirstateError {
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89 Map(DirstateMapError),
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90 Common(errors::HgError),
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91 }
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92
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93 impl From<HgPathError> for DirstateError {
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94 fn from(error: HgPathError) -> Self {
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95 Self::Map(DirstateMapError::InvalidPath(error))
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96 }
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97 }
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98
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99 impl fmt::Display for DirstateError {
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100 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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101 match self {
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102 DirstateError::Map(error) => error.fmt(f),
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103 DirstateError::Common(error) => error.fmt(f),
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104 }
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105 }
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106 }
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107
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108 #[derive(Debug, derive_more::From)]
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109 pub enum PatternError {
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110 #[from]
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111 Path(HgPathError),
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112 UnsupportedSyntax(String),
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113 UnsupportedSyntaxInFile(String, String, usize),
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114 TooLong(usize),
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115 #[from]
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116 IO(std::io::Error),
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117 /// Needed a pattern that can be turned into a regex but got one that
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118 /// can't. This should only happen through programmer error.
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119 NonRegexPattern(IgnorePattern),
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120 }
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121
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122 impl fmt::Display for PatternError {
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123 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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124 match self {
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125 PatternError::UnsupportedSyntax(syntax) => {
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126 write!(f, "Unsupported syntax {}", syntax)
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127 }
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128 PatternError::UnsupportedSyntaxInFile(syntax, file_path, line) => {
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129 write!(
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130 f,
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131 "{}:{}: unsupported syntax {}",
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132 file_path, line, syntax
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133 )
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134 }
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135 PatternError::TooLong(size) => {
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136 write!(f, "matcher pattern is too long ({} bytes)", size)
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137 }
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138 PatternError::IO(error) => error.fmt(f),
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139 PatternError::Path(error) => error.fmt(f),
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140 PatternError::NonRegexPattern(pattern) => {
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141 write!(f, "'{:?}' cannot be turned into a regex", pattern)
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142 }
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143 }
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144 }
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145 }