Mercurial > hg
annotate rust/hg-core/src/lib.rs @ 42886:7083ac37314f
rust-dirstate: provide CopyMapIter and StateMapIter types
They will be used in the declaration of Python iterator types.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Sun, 08 Sep 2019 12:00:26 +0900 |
parents | a03a29462c0a |
children | 7a01778bc7b7 |
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1 // Copyright 2018 Georges Racinet <gracinet@anybox.fr> |
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2 // |
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3 // This software may be used and distributed according to the terms of the |
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4 // GNU General Public License version 2 or any later version. |
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5 mod ancestors; |
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6 pub mod dagops; |
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7 pub use ancestors::{AncestorsIterator, LazyAncestors, MissingAncestors}; |
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8 mod dirstate; |
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9 pub mod discovery; |
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10 pub mod testing; // unconditionally built, for use from integration tests |
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11 pub use dirstate::{ |
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12 dirs_multiset::{DirsMultiset, DirsMultisetIter}, |
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13 dirstate_map::DirstateMap, |
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14 parsers::{pack_dirstate, parse_dirstate, PARENT_SIZE}, |
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15 CopyMap, CopyMapIter, DirstateEntry, DirstateParents, EntryState, |
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16 StateMap, StateMapIter, |
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17 }; |
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18 mod filepatterns; |
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19 pub mod utils; |
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20 |
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21 pub use filepatterns::{ |
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22 build_single_regex, read_pattern_file, PatternSyntax, PatternTuple, |
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23 }; |
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24 |
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25 /// Mercurial revision numbers |
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26 /// |
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27 /// As noted in revlog.c, revision numbers are actually encoded in |
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28 /// 4 bytes, and are liberally converted to ints, whence the i32 |
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29 pub type Revision = i32; |
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30 |
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31 /// Marker expressing the absence of a parent |
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32 /// |
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33 /// Independently of the actual representation, `NULL_REVISION` is guaranteed |
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34 /// to be smaller that all existing revisions. |
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35 pub const NULL_REVISION: Revision = -1; |
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36 |
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37 /// Same as `mercurial.node.wdirrev` |
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38 /// |
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39 /// This is also equal to `i32::max_value()`, but it's better to spell |
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40 /// it out explicitely, same as in `mercurial.node` |
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41 pub const WORKING_DIRECTORY_REVISION: Revision = 0x7fffffff; |
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42 |
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43 /// The simplest expression of what we need of Mercurial DAGs. |
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44 pub trait Graph { |
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45 /// Return the two parents of the given `Revision`. |
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46 /// |
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47 /// Each of the parents can be independently `NULL_REVISION` |
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48 fn parents(&self, rev: Revision) -> Result<[Revision; 2], GraphError>; |
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49 } |
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50 |
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51 pub type LineNumber = usize; |
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52 |
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53 #[derive(Clone, Debug, PartialEq)] |
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54 pub enum GraphError { |
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55 ParentOutOfRange(Revision), |
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56 WorkingDirectoryUnsupported, |
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57 } |
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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 CorruptedEntry(String), |
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64 Damaged, |
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65 } |
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66 |
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67 impl From<std::io::Error> for DirstateParseError { |
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68 fn from(e: std::io::Error) -> Self { |
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69 DirstateParseError::CorruptedEntry(e.to_string()) |
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70 } |
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71 } |
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72 |
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73 impl ToString for DirstateParseError { |
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74 fn to_string(&self) -> String { |
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75 use crate::DirstateParseError::*; |
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76 match self { |
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77 TooLittleData => "Too little data for dirstate.".to_string(), |
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78 Overflow => "Overflow in dirstate.".to_string(), |
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79 CorruptedEntry(e) => format!("Corrupted entry: {:?}.", e), |
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80 Damaged => "Dirstate appears to be damaged.".to_string(), |
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81 } |
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82 } |
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83 } |
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84 |
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85 #[derive(Debug, PartialEq)] |
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86 pub enum DirstatePackError { |
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87 CorruptedEntry(String), |
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88 CorruptedParent, |
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89 BadSize(usize, usize), |
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90 } |
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91 |
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92 impl From<std::io::Error> for DirstatePackError { |
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93 fn from(e: std::io::Error) -> Self { |
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94 DirstatePackError::CorruptedEntry(e.to_string()) |
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95 } |
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96 } |
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97 #[derive(Debug, PartialEq)] |
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98 pub enum DirstateMapError { |
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99 PathNotFound(Vec<u8>), |
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100 EmptyPath, |
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101 } |
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102 |
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103 pub enum DirstateError { |
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104 Parse(DirstateParseError), |
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105 Pack(DirstatePackError), |
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106 Map(DirstateMapError), |
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107 IO(std::io::Error), |
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108 } |
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109 |
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110 impl From<DirstateParseError> for DirstateError { |
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111 fn from(e: DirstateParseError) -> Self { |
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112 DirstateError::Parse(e) |
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113 } |
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114 } |
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115 |
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116 impl From<DirstatePackError> for DirstateError { |
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117 fn from(e: DirstatePackError) -> Self { |
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118 DirstateError::Pack(e) |
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119 } |
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120 } |
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121 |
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122 #[derive(Debug)] |
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123 pub enum PatternError { |
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124 UnsupportedSyntax(String), |
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125 } |
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126 |
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127 #[derive(Debug)] |
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128 pub enum PatternFileError { |
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129 IO(std::io::Error), |
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130 Pattern(PatternError, LineNumber), |
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131 } |
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132 |
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133 impl From<std::io::Error> for PatternFileError { |
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134 fn from(e: std::io::Error) -> Self { |
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135 PatternFileError::IO(e) |
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136 } |
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137 } |
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138 |
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139 impl From<DirstateMapError> for DirstateError { |
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140 fn from(e: DirstateMapError) -> Self { |
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141 DirstateError::Map(e) |
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142 } |
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143 } |
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144 |
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145 impl From<std::io::Error> for DirstateError { |
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146 fn from(e: std::io::Error) -> Self { |
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147 DirstateError::IO(e) |
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148 } |
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149 } |