Mercurial > hg
annotate rust/hg-core/src/dirstate_tree/dirstate_map.rs @ 47333:69530e5d4fe5
dirstate-tree: Add `NodeRef` and `ChildNodesRef` enums
They are used instead of `&Node` and `&ChildNodes` respectively.
The `ChildNodes` type alias also becomes a similar enum.
For now they only have one variant each, to be extended later.
Adding enums now forces various use sites go through new methods
instead of manipulating the underlying data structure directly.
Differential Revision: https://phab.mercurial-scm.org/D10747
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Wed, 19 May 2021 13:15:00 +0200 |
parents | 4ee9f419c52e |
children | 18b3060fe598 |
rev | line source |
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1 use bytes_cast::BytesCast; |
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2 use micro_timer::timed; |
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3 use std::borrow::Cow; |
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4 use std::convert::TryInto; |
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5 use std::path::PathBuf; |
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6 |
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7 use super::on_disk; |
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8 use super::path_with_basename::WithBasename; |
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9 use crate::dirstate::parsers::pack_entry; |
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10 use crate::dirstate::parsers::packed_entry_size; |
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11 use crate::dirstate::parsers::parse_dirstate_entries; |
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12 use crate::dirstate::parsers::Timestamp; |
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13 use crate::matchers::Matcher; |
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14 use crate::utils::hg_path::{HgPath, HgPathBuf}; |
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15 use crate::CopyMapIter; |
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16 use crate::DirstateEntry; |
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17 use crate::DirstateError; |
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18 use crate::DirstateMapError; |
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19 use crate::DirstateParents; |
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20 use crate::DirstateStatus; |
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21 use crate::EntryState; |
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22 use crate::FastHashMap; |
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23 use crate::PatternFileWarning; |
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24 use crate::StateMapIter; |
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25 use crate::StatusError; |
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26 use crate::StatusOptions; |
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27 |
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28 pub struct DirstateMap<'on_disk> { |
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29 /// Contents of the `.hg/dirstate` file |
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30 pub(super) on_disk: &'on_disk [u8], |
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31 |
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32 pub(super) root: ChildNodes<'on_disk>, |
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33 |
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34 /// Number of nodes anywhere in the tree that have `.entry.is_some()`. |
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35 pub(super) nodes_with_entry_count: u32, |
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36 |
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37 /// Number of nodes anywhere in the tree that have |
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38 /// `.copy_source.is_some()`. |
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39 pub(super) nodes_with_copy_source_count: u32, |
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40 } |
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41 |
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42 /// Using a plain `HgPathBuf` of the full path from the repository root as a |
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43 /// map key would also work: all paths in a given map have the same parent |
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44 /// path, so comparing full paths gives the same result as comparing base |
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45 /// names. However `HashMap` would waste time always re-hashing the same |
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46 /// string prefix. |
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47 pub(super) type NodeKey<'on_disk> = WithBasename<Cow<'on_disk, HgPath>>; |
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48 |
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49 pub(super) enum ChildNodes<'on_disk> { |
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50 InMemory(FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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51 } |
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52 |
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53 pub(super) enum ChildNodesRef<'tree, 'on_disk> { |
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54 InMemory(&'tree FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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55 } |
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56 |
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57 pub(super) enum NodeRef<'tree, 'on_disk> { |
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58 InMemory(&'tree NodeKey<'on_disk>, &'tree Node<'on_disk>), |
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59 } |
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60 |
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61 impl Default for ChildNodes<'_> { |
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62 fn default() -> Self { |
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63 ChildNodes::InMemory(Default::default()) |
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64 } |
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65 } |
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66 |
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67 impl<'on_disk> ChildNodes<'on_disk> { |
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68 pub(super) fn as_ref<'tree>( |
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69 &'tree self, |
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70 ) -> ChildNodesRef<'tree, 'on_disk> { |
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71 match self { |
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72 ChildNodes::InMemory(nodes) => ChildNodesRef::InMemory(nodes), |
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73 } |
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74 } |
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75 |
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76 pub(super) fn is_empty(&self) -> bool { |
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77 match self { |
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78 ChildNodes::InMemory(nodes) => nodes.is_empty(), |
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79 } |
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80 } |
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81 |
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82 pub(super) fn make_mut( |
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83 &mut self, |
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84 ) -> &mut FastHashMap<NodeKey<'on_disk>, Node<'on_disk>> { |
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85 match self { |
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86 ChildNodes::InMemory(nodes) => nodes, |
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87 } |
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88 } |
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89 } |
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90 |
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91 impl<'tree, 'on_disk> ChildNodesRef<'tree, 'on_disk> { |
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92 pub(super) fn get( |
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93 &self, |
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94 base_name: &HgPath, |
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95 ) -> Option<NodeRef<'tree, 'on_disk>> { |
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96 match self { |
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97 ChildNodesRef::InMemory(nodes) => nodes |
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98 .get_key_value(base_name) |
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99 .map(|(k, v)| NodeRef::InMemory(k, v)), |
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100 } |
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101 } |
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102 |
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103 /// Iterate in undefined order |
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104 pub(super) fn iter( |
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105 &self, |
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106 ) -> impl Iterator<Item = NodeRef<'tree, 'on_disk>> { |
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107 match self { |
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108 ChildNodesRef::InMemory(nodes) => { |
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109 nodes.iter().map(|(k, v)| NodeRef::InMemory(k, v)) |
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110 } |
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111 } |
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112 } |
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113 |
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114 /// Iterate in parallel in undefined order |
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115 pub(super) fn par_iter( |
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116 &self, |
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117 ) -> impl rayon::iter::ParallelIterator<Item = NodeRef<'tree, 'on_disk>> |
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118 { |
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119 use rayon::prelude::*; |
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120 match self { |
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121 ChildNodesRef::InMemory(nodes) => { |
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122 nodes.par_iter().map(|(k, v)| NodeRef::InMemory(k, v)) |
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123 } |
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124 } |
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125 } |
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126 |
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127 pub(super) fn sorted(&self) -> Vec<NodeRef<'tree, 'on_disk>> { |
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128 match self { |
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129 ChildNodesRef::InMemory(nodes) => { |
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130 let mut vec: Vec<_> = nodes |
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131 .iter() |
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132 .map(|(k, v)| NodeRef::InMemory(k, v)) |
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133 .collect(); |
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134 // `sort_unstable_by_key` doesn’t allow keys borrowing from the |
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135 // value: https://github.com/rust-lang/rust/issues/34162 |
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136 vec.sort_unstable_by(|a, b| a.base_name().cmp(b.base_name())); |
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137 vec |
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138 } |
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139 } |
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140 } |
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141 } |
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142 |
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143 impl<'tree, 'on_disk> NodeRef<'tree, 'on_disk> { |
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144 pub(super) fn full_path(&self) -> &'tree HgPath { |
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145 match self { |
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146 NodeRef::InMemory(path, _node) => path.full_path(), |
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147 } |
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148 } |
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149 |
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150 /// Returns a `Cow` that can borrow 'on_disk but is detached from 'tree |
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151 pub(super) fn full_path_cow(&self) -> Cow<'on_disk, HgPath> { |
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152 match self { |
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153 NodeRef::InMemory(path, _node) => path.full_path().clone(), |
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154 } |
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155 } |
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156 |
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157 pub(super) fn base_name(&self) -> &'tree HgPath { |
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158 match self { |
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159 NodeRef::InMemory(path, _node) => path.base_name(), |
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160 } |
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161 } |
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162 |
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163 pub(super) fn children(&self) -> ChildNodesRef<'tree, 'on_disk> { |
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164 match self { |
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165 NodeRef::InMemory(_path, node) => node.children.as_ref(), |
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166 } |
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167 } |
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168 |
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169 pub(super) fn copy_source(&self) -> Option<&'tree HgPath> { |
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170 match self { |
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171 NodeRef::InMemory(_path, node) => { |
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172 node.copy_source.as_ref().map(|s| &**s) |
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173 } |
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174 } |
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175 } |
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176 |
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177 pub(super) fn has_entry(&self) -> bool { |
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178 match self { |
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179 NodeRef::InMemory(_path, node) => node.entry.is_some(), |
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180 } |
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181 } |
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182 |
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183 pub(super) fn entry(&self) -> Option<DirstateEntry> { |
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184 match self { |
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185 NodeRef::InMemory(_path, node) => node.entry, |
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186 } |
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187 } |
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188 pub(super) fn state(&self) -> Option<EntryState> { |
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189 match self { |
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190 NodeRef::InMemory(_path, node) => { |
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191 node.entry.as_ref().map(|entry| entry.state) |
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192 } |
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193 } |
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194 } |
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195 |
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196 pub(super) fn tracked_descendants_count(&self) -> u32 { |
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197 match self { |
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198 NodeRef::InMemory(_path, node) => node.tracked_descendants_count, |
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199 } |
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200 } |
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201 } |
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202 |
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203 /// Represents a file or a directory |
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204 #[derive(Default)] |
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205 pub(super) struct Node<'on_disk> { |
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206 /// `None` for directories |
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207 pub(super) entry: Option<DirstateEntry>, |
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208 |
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209 pub(super) copy_source: Option<Cow<'on_disk, HgPath>>, |
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210 |
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211 pub(super) children: ChildNodes<'on_disk>, |
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212 |
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213 /// How many (non-inclusive) descendants of this node are tracked files |
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214 pub(super) tracked_descendants_count: u32, |
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215 } |
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216 |
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217 impl<'on_disk> DirstateMap<'on_disk> { |
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218 pub(super) fn empty(on_disk: &'on_disk [u8]) -> Self { |
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219 Self { |
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220 on_disk, |
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221 root: ChildNodes::default(), |
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222 nodes_with_entry_count: 0, |
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223 nodes_with_copy_source_count: 0, |
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224 } |
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225 } |
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226 |
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227 #[timed] |
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228 pub fn new_v2( |
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229 on_disk: &'on_disk [u8], |
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230 ) -> Result<(Self, Option<DirstateParents>), DirstateError> { |
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231 on_disk::read(on_disk) |
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232 } |
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233 |
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234 #[timed] |
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235 pub fn new_v1( |
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236 on_disk: &'on_disk [u8], |
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237 ) -> Result<(Self, Option<DirstateParents>), DirstateError> { |
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238 let mut map = Self::empty(on_disk); |
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239 if map.on_disk.is_empty() { |
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240 return Ok((map, None)); |
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241 } |
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242 |
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243 let parents = parse_dirstate_entries( |
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244 map.on_disk, |
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245 |path, entry, copy_source| { |
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246 let tracked = entry.state.is_tracked(); |
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247 let node = Self::get_or_insert_node( |
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248 &mut map.root, |
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249 path, |
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250 WithBasename::to_cow_borrowed, |
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251 |ancestor| { |
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252 if tracked { |
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253 ancestor.tracked_descendants_count += 1 |
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254 } |
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255 }, |
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256 ); |
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257 assert!( |
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258 node.entry.is_none(), |
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259 "duplicate dirstate entry in read" |
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260 ); |
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261 assert!( |
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262 node.copy_source.is_none(), |
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263 "duplicate dirstate entry in read" |
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264 ); |
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265 node.entry = Some(*entry); |
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266 node.copy_source = copy_source.map(Cow::Borrowed); |
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267 map.nodes_with_entry_count += 1; |
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268 if copy_source.is_some() { |
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269 map.nodes_with_copy_source_count += 1 |
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270 } |
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271 }, |
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272 )?; |
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273 let parents = Some(parents.clone()); |
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274 |
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275 Ok((map, parents)) |
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276 } |
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277 |
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278 fn get_node<'tree>( |
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279 &'tree self, |
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280 path: &HgPath, |
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281 ) -> Option<NodeRef<'tree, 'on_disk>> { |
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282 let mut children = self.root.as_ref(); |
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283 let mut components = path.components(); |
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284 let mut component = |
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285 components.next().expect("expected at least one components"); |
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286 loop { |
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287 let child = children.get(component)?; |
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288 if let Some(next_component) = components.next() { |
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289 component = next_component; |
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290 children = child.children(); |
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291 } else { |
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292 return Some(child); |
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293 } |
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294 } |
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295 } |
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296 |
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297 /// Returns a mutable reference to the node at `path` if it exists |
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298 /// |
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299 /// This takes `root` instead of `&mut self` so that callers can mutate |
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300 /// other fields while the returned borrow is still valid |
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301 fn get_node_mut<'tree>( |
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302 root: &'tree mut ChildNodes<'on_disk>, |
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303 path: &HgPath, |
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304 ) -> Option<&'tree mut Node<'on_disk>> { |
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305 let mut children = root; |
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306 let mut components = path.components(); |
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307 let mut component = |
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308 components.next().expect("expected at least one components"); |
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309 loop { |
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310 let child = children.make_mut().get_mut(component)?; |
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311 if let Some(next_component) = components.next() { |
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312 component = next_component; |
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313 children = &mut child.children; |
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314 } else { |
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315 return Some(child); |
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316 } |
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317 } |
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318 } |
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319 |
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320 fn get_or_insert_node<'tree, 'path>( |
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321 root: &'tree mut ChildNodes<'on_disk>, |
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322 path: &'path HgPath, |
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323 to_cow: impl Fn( |
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324 WithBasename<&'path HgPath>, |
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325 ) -> WithBasename<Cow<'on_disk, HgPath>>, |
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326 mut each_ancestor: impl FnMut(&mut Node), |
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327 ) -> &'tree mut Node<'on_disk> { |
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328 let mut child_nodes = root; |
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329 let mut inclusive_ancestor_paths = |
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330 WithBasename::inclusive_ancestors_of(path); |
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331 let mut ancestor_path = inclusive_ancestor_paths |
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332 .next() |
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333 .expect("expected at least one inclusive ancestor"); |
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334 loop { |
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335 // TODO: can we avoid allocating an owned key in cases where the |
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336 // map already contains that key, without introducing double |
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337 // lookup? |
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338 let child_node = child_nodes |
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339 .make_mut() |
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340 .entry(to_cow(ancestor_path)) |
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341 .or_default(); |
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342 if let Some(next) = inclusive_ancestor_paths.next() { |
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343 each_ancestor(child_node); |
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344 ancestor_path = next; |
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345 child_nodes = &mut child_node.children; |
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346 } else { |
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347 return child_node; |
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348 } |
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349 } |
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350 } |
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351 |
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352 fn add_or_remove_file( |
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353 &mut self, |
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354 path: &HgPath, |
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355 old_state: EntryState, |
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356 new_entry: DirstateEntry, |
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357 ) { |
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358 let tracked_count_increment = |
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359 match (old_state.is_tracked(), new_entry.state.is_tracked()) { |
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360 (false, true) => 1, |
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361 (true, false) => -1, |
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362 _ => 0, |
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363 }; |
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364 |
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365 let node = Self::get_or_insert_node( |
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366 &mut self.root, |
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367 path, |
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368 WithBasename::to_cow_owned, |
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369 |ancestor| { |
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370 // We can’t use `+= increment` because the counter is unsigned, |
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371 // and we want debug builds to detect accidental underflow |
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372 // through zero |
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373 match tracked_count_increment { |
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374 1 => ancestor.tracked_descendants_count += 1, |
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375 -1 => ancestor.tracked_descendants_count -= 1, |
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376 _ => {} |
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377 } |
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378 }, |
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379 ); |
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380 if node.entry.is_none() { |
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381 self.nodes_with_entry_count += 1 |
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382 } |
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383 node.entry = Some(new_entry) |
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384 } |
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385 |
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386 fn iter_nodes<'tree>( |
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387 &'tree self, |
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388 ) -> impl Iterator<Item = NodeRef<'tree, 'on_disk>> + 'tree { |
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389 // Depth first tree traversal. |
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390 // |
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391 // If we could afford internal iteration and recursion, |
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392 // this would look like: |
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393 // |
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394 // ``` |
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395 // fn traverse_children( |
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396 // children: &ChildNodes, |
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397 // each: &mut impl FnMut(&Node), |
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398 // ) { |
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399 // for child in children.values() { |
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400 // traverse_children(&child.children, each); |
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401 // each(child); |
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402 // } |
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403 // } |
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404 // ``` |
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405 // |
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406 // However we want an external iterator and therefore can’t use the |
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407 // call stack. Use an explicit stack instead: |
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408 let mut stack = Vec::new(); |
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409 let mut iter = self.root.as_ref().iter(); |
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410 std::iter::from_fn(move || { |
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411 while let Some(child_node) = iter.next() { |
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412 // Pseudo-recursion |
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413 let new_iter = child_node.children().iter(); |
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414 let old_iter = std::mem::replace(&mut iter, new_iter); |
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415 stack.push((child_node, old_iter)); |
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416 } |
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417 // Found the end of a `children.iter()` iterator. |
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418 if let Some((child_node, next_iter)) = stack.pop() { |
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419 // "Return" from pseudo-recursion by restoring state from the |
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420 // explicit stack |
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421 iter = next_iter; |
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422 |
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423 Some(child_node) |
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424 } else { |
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425 // Reached the bottom of the stack, we’re done |
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426 None |
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427 } |
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428 }) |
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429 } |
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430 |
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431 fn clear_known_ambiguous_mtimes(&mut self, paths: &[impl AsRef<HgPath>]) { |
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432 for path in paths { |
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433 if let Some(node) = |
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434 Self::get_node_mut(&mut self.root, path.as_ref()) |
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435 { |
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436 if let Some(entry) = node.entry.as_mut() { |
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437 entry.clear_mtime(); |
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438 } |
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439 } |
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440 } |
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441 } |
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442 } |
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443 |
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444 impl<'on_disk> super::dispatch::DirstateMapMethods for DirstateMap<'on_disk> { |
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445 fn clear(&mut self) { |
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446 self.root = Default::default(); |
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447 self.nodes_with_entry_count = 0; |
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448 self.nodes_with_copy_source_count = 0; |
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449 } |
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450 |
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451 fn add_file( |
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452 &mut self, |
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453 filename: &HgPath, |
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454 old_state: EntryState, |
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455 entry: DirstateEntry, |
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456 ) -> Result<(), DirstateMapError> { |
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457 self.add_or_remove_file(filename, old_state, entry); |
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458 Ok(()) |
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459 } |
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460 |
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461 fn remove_file( |
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462 &mut self, |
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463 filename: &HgPath, |
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464 old_state: EntryState, |
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465 size: i32, |
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466 ) -> Result<(), DirstateMapError> { |
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467 let entry = DirstateEntry { |
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468 state: EntryState::Removed, |
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469 mode: 0, |
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470 size, |
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471 mtime: 0, |
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472 }; |
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473 self.add_or_remove_file(filename, old_state, entry); |
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474 Ok(()) |
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475 } |
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476 |
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477 fn drop_file( |
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478 &mut self, |
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479 filename: &HgPath, |
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480 old_state: EntryState, |
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481 ) -> Result<bool, DirstateMapError> { |
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482 struct Dropped { |
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483 was_tracked: bool, |
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484 had_entry: bool, |
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485 had_copy_source: bool, |
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486 } |
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487 fn recur(nodes: &mut ChildNodes, path: &HgPath) -> Option<Dropped> { |
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488 let (first_path_component, rest_of_path) = |
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489 path.split_first_component(); |
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490 let node = nodes.make_mut().get_mut(first_path_component)?; |
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491 let dropped; |
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492 if let Some(rest) = rest_of_path { |
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493 dropped = recur(&mut node.children, rest)?; |
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494 if dropped.was_tracked { |
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495 node.tracked_descendants_count -= 1; |
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496 } |
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497 } else { |
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498 dropped = Dropped { |
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499 was_tracked: node |
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500 .entry |
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501 .as_ref() |
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502 .map_or(false, |entry| entry.state.is_tracked()), |
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503 had_entry: node.entry.take().is_some(), |
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504 had_copy_source: node.copy_source.take().is_some(), |
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505 }; |
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506 } |
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507 // After recursion, for both leaf (rest_of_path is None) nodes and |
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508 // parent nodes, remove a node if it just became empty. |
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509 if node.entry.is_none() |
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510 && node.copy_source.is_none() |
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511 && node.children.is_empty() |
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512 { |
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513 nodes.make_mut().remove(first_path_component); |
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514 } |
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515 Some(dropped) |
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516 } |
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517 |
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518 if let Some(dropped) = recur(&mut self.root, filename) { |
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519 if dropped.had_entry { |
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520 self.nodes_with_entry_count -= 1 |
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521 } |
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522 if dropped.had_copy_source { |
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523 self.nodes_with_copy_source_count -= 1 |
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524 } |
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525 Ok(dropped.had_entry) |
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526 } else { |
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527 debug_assert!(!old_state.is_tracked()); |
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528 Ok(false) |
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529 } |
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530 } |
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531 |
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532 fn clear_ambiguous_times(&mut self, filenames: Vec<HgPathBuf>, now: i32) { |
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533 for filename in filenames { |
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534 if let Some(node) = Self::get_node_mut(&mut self.root, &filename) { |
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535 if let Some(entry) = node.entry.as_mut() { |
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536 entry.clear_ambiguous_mtime(now); |
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537 } |
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538 } |
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539 } |
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540 } |
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541 |
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542 fn non_normal_entries_contains(&mut self, key: &HgPath) -> bool { |
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543 self.get_node(key) |
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544 .and_then(|node| node.entry()) |
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545 .map_or(false, |entry| entry.is_non_normal()) |
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546 } |
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547 |
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548 fn non_normal_entries_remove(&mut self, _key: &HgPath) { |
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549 // Do nothing, this `DirstateMap` does not have a separate "non normal |
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550 // entries" set that need to be kept up to date |
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551 } |
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552 |
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553 fn non_normal_or_other_parent_paths( |
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554 &mut self, |
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555 ) -> Box<dyn Iterator<Item = &HgPath> + '_> { |
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556 Box::new(self.iter_nodes().filter_map(|node| { |
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557 node.entry() |
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558 .filter(|entry| { |
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559 entry.is_non_normal() || entry.is_from_other_parent() |
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560 }) |
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561 .map(|_| node.full_path()) |
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562 })) |
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563 } |
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564 |
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565 fn set_non_normal_other_parent_entries(&mut self, _force: bool) { |
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566 // Do nothing, this `DirstateMap` does not have a separate "non normal |
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567 // entries" and "from other parent" sets that need to be recomputed |
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568 } |
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569 |
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570 fn iter_non_normal_paths( |
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571 &mut self, |
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572 ) -> Box<dyn Iterator<Item = &HgPath> + Send + '_> { |
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573 self.iter_non_normal_paths_panic() |
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574 } |
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575 |
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576 fn iter_non_normal_paths_panic( |
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577 &self, |
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578 ) -> Box<dyn Iterator<Item = &HgPath> + Send + '_> { |
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579 Box::new(self.iter_nodes().filter_map(|node| { |
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580 node.entry() |
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581 .filter(|entry| entry.is_non_normal()) |
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582 .map(|_| node.full_path()) |
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583 })) |
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584 } |
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585 |
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586 fn iter_other_parent_paths( |
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587 &mut self, |
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588 ) -> Box<dyn Iterator<Item = &HgPath> + Send + '_> { |
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589 Box::new(self.iter_nodes().filter_map(|node| { |
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590 node.entry() |
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591 .filter(|entry| entry.is_from_other_parent()) |
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592 .map(|_| node.full_path()) |
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593 })) |
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594 } |
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595 |
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596 fn has_tracked_dir( |
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597 &mut self, |
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598 directory: &HgPath, |
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599 ) -> Result<bool, DirstateMapError> { |
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600 if let Some(node) = self.get_node(directory) { |
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601 // A node without a `DirstateEntry` was created to hold child |
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602 // nodes, and is therefore a directory. |
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603 Ok(!node.has_entry() && node.tracked_descendants_count() > 0) |
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604 } else { |
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605 Ok(false) |
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606 } |
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607 } |
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608 |
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609 fn has_dir( |
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610 &mut self, |
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611 directory: &HgPath, |
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612 ) -> Result<bool, DirstateMapError> { |
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613 if let Some(node) = self.get_node(directory) { |
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614 // A node without a `DirstateEntry` was created to hold child |
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615 // nodes, and is therefore a directory. |
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616 Ok(!node.has_entry()) |
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617 } else { |
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618 Ok(false) |
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619 } |
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620 } |
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621 |
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622 #[timed] |
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623 fn pack_v1( |
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624 &mut self, |
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625 parents: DirstateParents, |
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626 now: Timestamp, |
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627 ) -> Result<Vec<u8>, DirstateError> { |
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628 let now: i32 = now.0.try_into().expect("time overflow"); |
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629 let mut ambiguous_mtimes = Vec::new(); |
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630 // Optizimation (to be measured?): pre-compute size to avoid `Vec` |
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631 // reallocations |
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632 let mut size = parents.as_bytes().len(); |
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633 for node in self.iter_nodes() { |
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634 if let Some(entry) = node.entry() { |
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635 size += |
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636 packed_entry_size(node.full_path(), node.copy_source()); |
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637 if entry.mtime_is_ambiguous(now) { |
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638 ambiguous_mtimes.push(node.full_path_cow()) |
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639 } |
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640 } |
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641 } |
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642 self.clear_known_ambiguous_mtimes(&ambiguous_mtimes); |
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643 |
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644 let mut packed = Vec::with_capacity(size); |
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645 packed.extend(parents.as_bytes()); |
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646 |
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647 for node in self.iter_nodes() { |
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648 if let Some(entry) = node.entry() { |
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649 pack_entry( |
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650 node.full_path(), |
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651 &entry, |
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652 node.copy_source(), |
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653 &mut packed, |
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654 ); |
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655 } |
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656 } |
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657 Ok(packed) |
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658 } |
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659 |
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660 #[timed] |
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661 fn pack_v2( |
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662 &mut self, |
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663 parents: DirstateParents, |
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664 now: Timestamp, |
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665 ) -> Result<Vec<u8>, DirstateError> { |
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666 // TODO: how do we want to handle this in 2038? |
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667 let now: i32 = now.0.try_into().expect("time overflow"); |
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668 let mut paths = Vec::new(); |
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669 for node in self.iter_nodes() { |
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670 if let Some(entry) = node.entry() { |
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671 if entry.mtime_is_ambiguous(now) { |
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672 paths.push(node.full_path_cow()) |
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673 } |
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674 } |
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675 } |
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676 // Borrow of `self` ends here since we collect cloned paths |
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677 |
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678 self.clear_known_ambiguous_mtimes(&paths); |
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679 |
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680 on_disk::write(self, parents) |
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681 } |
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682 |
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683 fn set_all_dirs(&mut self) -> Result<(), DirstateMapError> { |
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684 // Do nothing, this `DirstateMap` does not a separate `all_dirs` that |
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685 // needs to be recomputed |
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686 Ok(()) |
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687 } |
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688 |
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689 fn set_dirs(&mut self) -> Result<(), DirstateMapError> { |
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690 // Do nothing, this `DirstateMap` does not a separate `dirs` that needs |
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691 // to be recomputed |
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692 Ok(()) |
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693 } |
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694 |
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695 fn status<'a>( |
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696 &'a mut self, |
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697 matcher: &'a (dyn Matcher + Sync), |
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698 root_dir: PathBuf, |
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699 ignore_files: Vec<PathBuf>, |
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700 options: StatusOptions, |
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701 ) -> Result<(DirstateStatus<'a>, Vec<PatternFileWarning>), StatusError> |
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702 { |
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703 super::status::status(self, matcher, root_dir, ignore_files, options) |
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704 } |
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705 |
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706 fn copy_map_len(&self) -> usize { |
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707 self.nodes_with_copy_source_count as usize |
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708 } |
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709 |
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710 fn copy_map_iter(&self) -> CopyMapIter<'_> { |
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711 Box::new(self.iter_nodes().filter_map(|node| { |
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712 node.copy_source() |
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713 .map(|copy_source| (node.full_path(), copy_source)) |
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714 })) |
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715 } |
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716 |
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717 fn copy_map_contains_key(&self, key: &HgPath) -> bool { |
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718 if let Some(node) = self.get_node(key) { |
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719 node.copy_source().is_some() |
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720 } else { |
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721 false |
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722 } |
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723 } |
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724 |
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725 fn copy_map_get(&self, key: &HgPath) -> Option<&HgPath> { |
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726 self.get_node(key)?.copy_source() |
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727 } |
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728 |
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729 fn copy_map_remove(&mut self, key: &HgPath) -> Option<HgPathBuf> { |
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730 let count = &mut self.nodes_with_copy_source_count; |
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731 Self::get_node_mut(&mut self.root, key).and_then(|node| { |
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732 if node.copy_source.is_some() { |
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733 *count -= 1 |
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734 } |
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735 node.copy_source.take().map(Cow::into_owned) |
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736 }) |
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737 } |
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738 |
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739 fn copy_map_insert( |
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740 &mut self, |
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741 key: HgPathBuf, |
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742 value: HgPathBuf, |
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743 ) -> Option<HgPathBuf> { |
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744 let node = Self::get_or_insert_node( |
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745 &mut self.root, |
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746 &key, |
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747 WithBasename::to_cow_owned, |
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748 |_ancestor| {}, |
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749 ); |
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750 if node.copy_source.is_none() { |
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751 self.nodes_with_copy_source_count += 1 |
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752 } |
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753 node.copy_source.replace(value.into()).map(Cow::into_owned) |
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754 } |
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755 |
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756 fn len(&self) -> usize { |
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757 self.nodes_with_entry_count as usize |
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758 } |
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759 |
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760 fn contains_key(&self, key: &HgPath) -> bool { |
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761 self.get(key).is_some() |
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762 } |
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763 |
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764 fn get(&self, key: &HgPath) -> Option<DirstateEntry> { |
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765 self.get_node(key)?.entry() |
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766 } |
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767 |
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768 fn iter(&self) -> StateMapIter<'_> { |
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769 Box::new(self.iter_nodes().filter_map(|node| { |
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770 node.entry().map(|entry| (node.full_path(), entry)) |
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771 })) |
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772 } |
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773 } |