Mercurial > hg
annotate rust/hg-core/src/dirstate_tree/dirstate_map.rs @ 49121:10edc54d18f1
rust-dirstatemap: remove `set_dirstate_entry`/`set_entry` methods
These methods were needed crutches before the Rust implementation caught up
to Python. Calling `set_entry` (whether from Python or Rust) was dangerous
since it didn't update any of the counters of the DirstateMap data structure,
while having no real way of knowing when to use it "correctly" except it you
were one of the 3 people who looked deep enough into the soul of this code.
Differential Revision: https://phab.mercurial-scm.org/D12519
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Tue, 29 Mar 2022 00:57:06 +0200 |
parents | 3df46f3a3d6c |
children | afe60def963d |
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::path::PathBuf; |
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5 |
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6 use super::on_disk; |
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7 use super::on_disk::DirstateV2ParseError; |
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8 use super::owning::OwningDirstateMap; |
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9 use super::path_with_basename::WithBasename; |
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10 use crate::dirstate::parsers::pack_entry; |
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11 use crate::dirstate::parsers::packed_entry_size; |
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12 use crate::dirstate::parsers::parse_dirstate_entries; |
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13 use crate::dirstate::CopyMapIter; |
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14 use crate::dirstate::DirstateV2Data; |
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15 use crate::dirstate::ParentFileData; |
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16 use crate::dirstate::StateMapIter; |
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17 use crate::dirstate::TruncatedTimestamp; |
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18 use crate::matchers::Matcher; |
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19 use crate::utils::hg_path::{HgPath, HgPathBuf}; |
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20 use crate::DirstateEntry; |
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21 use crate::DirstateError; |
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22 use crate::DirstateMapError; |
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23 use crate::DirstateParents; |
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24 use crate::DirstateStatus; |
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25 use crate::EntryState; |
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26 use crate::FastHashbrownMap as FastHashMap; |
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27 use crate::PatternFileWarning; |
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28 use crate::StatusError; |
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29 use crate::StatusOptions; |
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30 |
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31 /// Append to an existing data file if the amount of unreachable data (not used |
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32 /// anymore) is less than this fraction of the total amount of existing data. |
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33 const ACCEPTABLE_UNREACHABLE_BYTES_RATIO: f32 = 0.5; |
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34 |
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35 pub struct DirstateMap<'on_disk> { |
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36 /// Contents of the `.hg/dirstate` file |
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37 pub(super) on_disk: &'on_disk [u8], |
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38 |
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39 pub(super) root: ChildNodes<'on_disk>, |
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40 |
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41 /// Number of nodes anywhere in the tree that have `.entry.is_some()`. |
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42 pub(super) nodes_with_entry_count: u32, |
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43 |
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44 /// Number of nodes anywhere in the tree that have |
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45 /// `.copy_source.is_some()`. |
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46 pub(super) nodes_with_copy_source_count: u32, |
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47 |
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48 /// See on_disk::Header |
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49 pub(super) ignore_patterns_hash: on_disk::IgnorePatternsHash, |
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50 |
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51 /// How many bytes of `on_disk` are not used anymore |
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52 pub(super) unreachable_bytes: u32, |
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53 } |
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54 |
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55 /// Using a plain `HgPathBuf` of the full path from the repository root as a |
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56 /// map key would also work: all paths in a given map have the same parent |
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57 /// path, so comparing full paths gives the same result as comparing base |
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58 /// names. However `HashMap` would waste time always re-hashing the same |
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59 /// string prefix. |
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60 pub(super) type NodeKey<'on_disk> = WithBasename<Cow<'on_disk, HgPath>>; |
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61 |
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62 /// Similar to `&'tree Cow<'on_disk, HgPath>`, but can also be returned |
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63 /// for on-disk nodes that don’t actually have a `Cow` to borrow. |
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64 pub(super) enum BorrowedPath<'tree, 'on_disk> { |
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65 InMemory(&'tree HgPathBuf), |
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66 OnDisk(&'on_disk HgPath), |
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67 } |
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68 |
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69 pub(super) enum ChildNodes<'on_disk> { |
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70 InMemory(FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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71 OnDisk(&'on_disk [on_disk::Node]), |
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72 } |
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73 |
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74 pub(super) enum ChildNodesRef<'tree, 'on_disk> { |
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75 InMemory(&'tree FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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76 OnDisk(&'on_disk [on_disk::Node]), |
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77 } |
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78 |
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79 pub(super) enum NodeRef<'tree, 'on_disk> { |
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80 InMemory(&'tree NodeKey<'on_disk>, &'tree Node<'on_disk>), |
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81 OnDisk(&'on_disk on_disk::Node), |
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82 } |
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83 |
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84 impl<'tree, 'on_disk> BorrowedPath<'tree, 'on_disk> { |
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85 pub fn detach_from_tree(&self) -> Cow<'on_disk, HgPath> { |
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86 match *self { |
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87 BorrowedPath::InMemory(in_memory) => Cow::Owned(in_memory.clone()), |
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88 BorrowedPath::OnDisk(on_disk) => Cow::Borrowed(on_disk), |
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89 } |
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90 } |
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91 } |
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92 |
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93 impl<'tree, 'on_disk> std::ops::Deref for BorrowedPath<'tree, 'on_disk> { |
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94 type Target = HgPath; |
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95 |
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96 fn deref(&self) -> &HgPath { |
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97 match *self { |
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98 BorrowedPath::InMemory(in_memory) => in_memory, |
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99 BorrowedPath::OnDisk(on_disk) => on_disk, |
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100 } |
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101 } |
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102 } |
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103 |
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104 impl Default for ChildNodes<'_> { |
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105 fn default() -> Self { |
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106 ChildNodes::InMemory(Default::default()) |
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107 } |
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108 } |
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109 |
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110 impl<'on_disk> ChildNodes<'on_disk> { |
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111 pub(super) fn as_ref<'tree>( |
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112 &'tree self, |
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113 ) -> ChildNodesRef<'tree, 'on_disk> { |
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114 match self { |
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115 ChildNodes::InMemory(nodes) => ChildNodesRef::InMemory(nodes), |
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116 ChildNodes::OnDisk(nodes) => ChildNodesRef::OnDisk(nodes), |
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117 } |
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118 } |
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119 |
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120 pub(super) fn is_empty(&self) -> bool { |
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121 match self { |
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122 ChildNodes::InMemory(nodes) => nodes.is_empty(), |
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123 ChildNodes::OnDisk(nodes) => nodes.is_empty(), |
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124 } |
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125 } |
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126 |
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127 fn make_mut( |
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128 &mut self, |
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129 on_disk: &'on_disk [u8], |
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130 unreachable_bytes: &mut u32, |
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131 ) -> Result< |
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132 &mut FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>, |
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133 DirstateV2ParseError, |
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134 > { |
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135 match self { |
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136 ChildNodes::InMemory(nodes) => Ok(nodes), |
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137 ChildNodes::OnDisk(nodes) => { |
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138 *unreachable_bytes += |
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139 std::mem::size_of_val::<[on_disk::Node]>(nodes) as u32; |
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140 let nodes = nodes |
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141 .iter() |
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142 .map(|node| { |
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143 Ok(( |
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144 node.path(on_disk)?, |
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145 node.to_in_memory_node(on_disk)?, |
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146 )) |
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147 }) |
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148 .collect::<Result<_, _>>()?; |
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149 *self = ChildNodes::InMemory(nodes); |
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150 match self { |
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151 ChildNodes::InMemory(nodes) => Ok(nodes), |
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152 ChildNodes::OnDisk(_) => unreachable!(), |
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153 } |
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154 } |
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155 } |
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156 } |
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157 } |
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158 |
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159 impl<'tree, 'on_disk> ChildNodesRef<'tree, 'on_disk> { |
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160 pub(super) fn get( |
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161 &self, |
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162 base_name: &HgPath, |
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163 on_disk: &'on_disk [u8], |
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164 ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> { |
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165 match self { |
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166 ChildNodesRef::InMemory(nodes) => Ok(nodes |
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167 .get_key_value(base_name) |
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168 .map(|(k, v)| NodeRef::InMemory(k, v))), |
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169 ChildNodesRef::OnDisk(nodes) => { |
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170 let mut parse_result = Ok(()); |
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171 let search_result = nodes.binary_search_by(|node| { |
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172 match node.base_name(on_disk) { |
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173 Ok(node_base_name) => node_base_name.cmp(base_name), |
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174 Err(e) => { |
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175 parse_result = Err(e); |
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176 // Dummy comparison result, `search_result` won’t |
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177 // be used since `parse_result` is an error |
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178 std::cmp::Ordering::Equal |
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179 } |
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180 } |
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181 }); |
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182 parse_result.map(|()| { |
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183 search_result.ok().map(|i| NodeRef::OnDisk(&nodes[i])) |
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184 }) |
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185 } |
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186 } |
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187 } |
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188 |
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189 /// Iterate in undefined order |
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190 pub(super) fn iter( |
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191 &self, |
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192 ) -> impl Iterator<Item = NodeRef<'tree, 'on_disk>> { |
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193 match self { |
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194 ChildNodesRef::InMemory(nodes) => itertools::Either::Left( |
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195 nodes.iter().map(|(k, v)| NodeRef::InMemory(k, v)), |
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196 ), |
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197 ChildNodesRef::OnDisk(nodes) => { |
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198 itertools::Either::Right(nodes.iter().map(NodeRef::OnDisk)) |
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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 /// Iterate in parallel in undefined order |
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204 pub(super) fn par_iter( |
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205 &self, |
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206 ) -> impl rayon::iter::ParallelIterator<Item = NodeRef<'tree, 'on_disk>> |
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207 { |
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208 use rayon::prelude::*; |
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209 match self { |
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210 ChildNodesRef::InMemory(nodes) => rayon::iter::Either::Left( |
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211 nodes.par_iter().map(|(k, v)| NodeRef::InMemory(k, v)), |
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212 ), |
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213 ChildNodesRef::OnDisk(nodes) => rayon::iter::Either::Right( |
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214 nodes.par_iter().map(NodeRef::OnDisk), |
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215 ), |
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216 } |
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217 } |
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218 |
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219 pub(super) fn sorted(&self) -> Vec<NodeRef<'tree, 'on_disk>> { |
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220 match self { |
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221 ChildNodesRef::InMemory(nodes) => { |
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222 let mut vec: Vec<_> = nodes |
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223 .iter() |
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224 .map(|(k, v)| NodeRef::InMemory(k, v)) |
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225 .collect(); |
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226 fn sort_key<'a>(node: &'a NodeRef) -> &'a HgPath { |
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227 match node { |
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228 NodeRef::InMemory(path, _node) => path.base_name(), |
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229 NodeRef::OnDisk(_) => unreachable!(), |
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230 } |
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231 } |
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232 // `sort_unstable_by_key` doesn’t allow keys borrowing from the |
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233 // value: https://github.com/rust-lang/rust/issues/34162 |
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234 vec.sort_unstable_by(|a, b| sort_key(a).cmp(sort_key(b))); |
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235 vec |
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236 } |
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237 ChildNodesRef::OnDisk(nodes) => { |
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238 // Nodes on disk are already sorted |
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239 nodes.iter().map(NodeRef::OnDisk).collect() |
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240 } |
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241 } |
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242 } |
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243 } |
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244 |
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245 impl<'tree, 'on_disk> NodeRef<'tree, 'on_disk> { |
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246 pub(super) fn full_path( |
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247 &self, |
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248 on_disk: &'on_disk [u8], |
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249 ) -> Result<&'tree HgPath, DirstateV2ParseError> { |
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250 match self { |
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251 NodeRef::InMemory(path, _node) => Ok(path.full_path()), |
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252 NodeRef::OnDisk(node) => node.full_path(on_disk), |
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253 } |
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254 } |
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255 |
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256 /// Returns a `BorrowedPath`, which can be turned into a `Cow<'on_disk, |
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257 /// HgPath>` detached from `'tree` |
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258 pub(super) fn full_path_borrowed( |
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259 &self, |
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260 on_disk: &'on_disk [u8], |
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261 ) -> Result<BorrowedPath<'tree, 'on_disk>, DirstateV2ParseError> { |
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262 match self { |
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263 NodeRef::InMemory(path, _node) => match path.full_path() { |
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264 Cow::Borrowed(on_disk) => Ok(BorrowedPath::OnDisk(on_disk)), |
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265 Cow::Owned(in_memory) => Ok(BorrowedPath::InMemory(in_memory)), |
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266 }, |
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267 NodeRef::OnDisk(node) => { |
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268 Ok(BorrowedPath::OnDisk(node.full_path(on_disk)?)) |
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269 } |
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270 } |
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271 } |
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272 |
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273 pub(super) fn base_name( |
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274 &self, |
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275 on_disk: &'on_disk [u8], |
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276 ) -> Result<&'tree HgPath, DirstateV2ParseError> { |
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277 match self { |
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278 NodeRef::InMemory(path, _node) => Ok(path.base_name()), |
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279 NodeRef::OnDisk(node) => node.base_name(on_disk), |
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280 } |
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281 } |
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282 |
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283 pub(super) fn children( |
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284 &self, |
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285 on_disk: &'on_disk [u8], |
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286 ) -> Result<ChildNodesRef<'tree, 'on_disk>, DirstateV2ParseError> { |
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287 match self { |
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288 NodeRef::InMemory(_path, node) => Ok(node.children.as_ref()), |
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289 NodeRef::OnDisk(node) => { |
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290 Ok(ChildNodesRef::OnDisk(node.children(on_disk)?)) |
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291 } |
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292 } |
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293 } |
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294 |
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295 pub(super) fn has_copy_source(&self) -> bool { |
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296 match self { |
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297 NodeRef::InMemory(_path, node) => node.copy_source.is_some(), |
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298 NodeRef::OnDisk(node) => node.has_copy_source(), |
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299 } |
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300 } |
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301 |
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302 pub(super) fn copy_source( |
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303 &self, |
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304 on_disk: &'on_disk [u8], |
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305 ) -> Result<Option<&'tree HgPath>, DirstateV2ParseError> { |
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306 match self { |
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307 NodeRef::InMemory(_path, node) => { |
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308 Ok(node.copy_source.as_ref().map(|s| &**s)) |
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309 } |
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310 NodeRef::OnDisk(node) => node.copy_source(on_disk), |
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311 } |
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312 } |
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313 /// Returns a `BorrowedPath`, which can be turned into a `Cow<'on_disk, |
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314 /// HgPath>` detached from `'tree` |
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315 pub(super) fn copy_source_borrowed( |
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316 &self, |
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317 on_disk: &'on_disk [u8], |
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318 ) -> Result<Option<BorrowedPath<'tree, 'on_disk>>, DirstateV2ParseError> |
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319 { |
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320 Ok(match self { |
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321 NodeRef::InMemory(_path, node) => { |
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322 node.copy_source.as_ref().map(|source| match source { |
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323 Cow::Borrowed(on_disk) => BorrowedPath::OnDisk(on_disk), |
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324 Cow::Owned(in_memory) => BorrowedPath::InMemory(in_memory), |
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325 }) |
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326 } |
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327 NodeRef::OnDisk(node) => node |
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328 .copy_source(on_disk)? |
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329 .map(|source| BorrowedPath::OnDisk(source)), |
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330 }) |
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331 } |
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332 |
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333 pub(super) fn entry( |
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334 &self, |
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335 ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
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336 match self { |
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337 NodeRef::InMemory(_path, node) => { |
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338 Ok(node.data.as_entry().copied()) |
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339 } |
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340 NodeRef::OnDisk(node) => node.entry(), |
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341 } |
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342 } |
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343 |
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344 pub(super) fn state( |
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345 &self, |
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346 ) -> Result<Option<EntryState>, DirstateV2ParseError> { |
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347 Ok(self.entry()?.and_then(|e| { |
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348 if e.any_tracked() { |
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349 Some(e.state()) |
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350 } else { |
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351 None |
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352 } |
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353 })) |
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354 } |
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355 |
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356 pub(super) fn cached_directory_mtime( |
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357 &self, |
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358 ) -> Result<Option<TruncatedTimestamp>, DirstateV2ParseError> { |
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359 match self { |
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360 NodeRef::InMemory(_path, node) => Ok(match node.data { |
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361 NodeData::CachedDirectory { mtime } => Some(mtime), |
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362 _ => None, |
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363 }), |
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364 NodeRef::OnDisk(node) => node.cached_directory_mtime(), |
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365 } |
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366 } |
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367 |
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368 pub(super) fn descendants_with_entry_count(&self) -> u32 { |
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369 match self { |
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370 NodeRef::InMemory(_path, node) => { |
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371 node.descendants_with_entry_count |
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372 } |
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373 NodeRef::OnDisk(node) => node.descendants_with_entry_count.get(), |
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374 } |
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375 } |
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376 |
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377 pub(super) fn tracked_descendants_count(&self) -> u32 { |
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378 match self { |
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379 NodeRef::InMemory(_path, node) => node.tracked_descendants_count, |
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380 NodeRef::OnDisk(node) => node.tracked_descendants_count.get(), |
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381 } |
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382 } |
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383 } |
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384 |
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385 /// Represents a file or a directory |
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386 #[derive(Default)] |
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387 pub(super) struct Node<'on_disk> { |
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388 pub(super) data: NodeData, |
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389 |
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390 pub(super) copy_source: Option<Cow<'on_disk, HgPath>>, |
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391 |
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392 pub(super) children: ChildNodes<'on_disk>, |
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393 |
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394 /// How many (non-inclusive) descendants of this node have an entry. |
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395 pub(super) descendants_with_entry_count: u32, |
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396 |
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397 /// How many (non-inclusive) descendants of this node have an entry whose |
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398 /// state is "tracked". |
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399 pub(super) tracked_descendants_count: u32, |
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400 } |
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401 |
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402 pub(super) enum NodeData { |
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403 Entry(DirstateEntry), |
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404 CachedDirectory { mtime: TruncatedTimestamp }, |
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405 None, |
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406 } |
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407 |
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408 impl Default for NodeData { |
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409 fn default() -> Self { |
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410 NodeData::None |
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411 } |
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412 } |
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413 |
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414 impl NodeData { |
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415 fn has_entry(&self) -> bool { |
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416 match self { |
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417 NodeData::Entry(_) => true, |
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418 _ => false, |
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419 } |
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420 } |
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421 |
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422 fn as_entry(&self) -> Option<&DirstateEntry> { |
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423 match self { |
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424 NodeData::Entry(entry) => Some(entry), |
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425 _ => None, |
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426 } |
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427 } |
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428 |
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429 fn as_entry_mut(&mut self) -> Option<&mut DirstateEntry> { |
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430 match self { |
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431 NodeData::Entry(entry) => Some(entry), |
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432 _ => None, |
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433 } |
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434 } |
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435 } |
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436 |
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437 impl<'on_disk> DirstateMap<'on_disk> { |
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438 pub(super) fn empty(on_disk: &'on_disk [u8]) -> Self { |
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439 Self { |
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440 on_disk, |
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441 root: ChildNodes::default(), |
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442 nodes_with_entry_count: 0, |
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443 nodes_with_copy_source_count: 0, |
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444 ignore_patterns_hash: [0; on_disk::IGNORE_PATTERNS_HASH_LEN], |
47681
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445 unreachable_bytes: 0, |
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446 } |
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447 } |
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448 |
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449 #[timed] |
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450 pub fn new_v2( |
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451 on_disk: &'on_disk [u8], |
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452 data_size: usize, |
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453 metadata: &[u8], |
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454 ) -> Result<Self, DirstateError> { |
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455 if let Some(data) = on_disk.get(..data_size) { |
47682
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456 Ok(on_disk::read(data, metadata)?) |
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457 } else { |
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458 Err(DirstateV2ParseError.into()) |
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459 } |
47280
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460 } |
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461 |
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462 #[timed] |
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|
463 pub fn new_v1( |
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464 on_disk: &'on_disk [u8], |
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465 ) -> Result<(Self, Option<DirstateParents>), DirstateError> { |
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466 let mut map = Self::empty(on_disk); |
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467 if map.on_disk.is_empty() { |
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468 return Ok((map, None)); |
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|
469 } |
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470 |
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471 let parents = parse_dirstate_entries( |
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472 map.on_disk, |
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473 |path, entry, copy_source| { |
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474 let tracked = entry.state().is_tracked(); |
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|
475 let node = Self::get_or_insert_node( |
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476 map.on_disk, |
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477 &mut map.unreachable_bytes, |
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478 &mut map.root, |
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479 path, |
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480 WithBasename::to_cow_borrowed, |
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481 |ancestor| { |
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482 if tracked { |
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483 ancestor.tracked_descendants_count += 1 |
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484 } |
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485 ancestor.descendants_with_entry_count += 1 |
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486 }, |
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487 )?; |
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488 assert!( |
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489 !node.data.has_entry(), |
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490 "duplicate dirstate entry in read" |
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491 ); |
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492 assert!( |
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493 node.copy_source.is_none(), |
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494 "duplicate dirstate entry in read" |
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495 ); |
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496 node.data = NodeData::Entry(*entry); |
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497 node.copy_source = copy_source.map(Cow::Borrowed); |
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498 map.nodes_with_entry_count += 1; |
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499 if copy_source.is_some() { |
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500 map.nodes_with_copy_source_count += 1 |
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501 } |
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502 Ok(()) |
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503 }, |
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504 )?; |
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505 let parents = Some(parents.clone()); |
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506 |
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507 Ok((map, parents)) |
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508 } |
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509 |
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510 /// Assuming dirstate-v2 format, returns whether the next write should |
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511 /// append to the existing data file that contains `self.on_disk` (true), |
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512 /// or create a new data file from scratch (false). |
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513 pub(super) fn write_should_append(&self) -> bool { |
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514 let ratio = self.unreachable_bytes as f32 / self.on_disk.len() as f32; |
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515 ratio < ACCEPTABLE_UNREACHABLE_BYTES_RATIO |
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516 } |
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517 |
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518 fn get_node<'tree>( |
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519 &'tree self, |
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520 path: &HgPath, |
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521 ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> { |
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522 let mut children = self.root.as_ref(); |
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523 let mut components = path.components(); |
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524 let mut component = |
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525 components.next().expect("expected at least one components"); |
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526 loop { |
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527 if let Some(child) = children.get(component, self.on_disk)? { |
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528 if let Some(next_component) = components.next() { |
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529 component = next_component; |
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530 children = child.children(self.on_disk)?; |
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531 } else { |
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532 return Ok(Some(child)); |
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533 } |
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534 } else { |
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535 return Ok(None); |
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536 } |
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537 } |
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538 } |
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539 |
47106
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540 /// Returns a mutable reference to the node at `path` if it exists |
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541 /// |
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542 /// This takes `root` instead of `&mut self` so that callers can mutate |
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543 /// other fields while the returned borrow is still valid |
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544 fn get_node_mut<'tree>( |
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545 on_disk: &'on_disk [u8], |
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546 unreachable_bytes: &mut u32, |
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547 root: &'tree mut ChildNodes<'on_disk>, |
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548 path: &HgPath, |
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549 ) -> Result<Option<&'tree mut Node<'on_disk>>, DirstateV2ParseError> { |
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550 let mut children = root; |
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551 let mut components = path.components(); |
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552 let mut component = |
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553 components.next().expect("expected at least one components"); |
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554 loop { |
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555 if let Some(child) = children |
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556 .make_mut(on_disk, unreachable_bytes)? |
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557 .get_mut(component) |
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558 { |
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559 if let Some(next_component) = components.next() { |
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560 component = next_component; |
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561 children = &mut child.children; |
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562 } else { |
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563 return Ok(Some(child)); |
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|
564 } |
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565 } else { |
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|
566 return Ok(None); |
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567 } |
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568 } |
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569 } |
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570 |
47474
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|
571 pub(super) fn get_or_insert<'tree, 'path>( |
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572 &'tree mut self, |
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573 path: &HgPath, |
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574 ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> { |
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575 Self::get_or_insert_node( |
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576 self.on_disk, |
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577 &mut self.unreachable_bytes, |
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578 &mut self.root, |
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579 path, |
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580 WithBasename::to_cow_owned, |
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581 |_| {}, |
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582 ) |
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583 } |
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584 |
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|
585 fn get_or_insert_node<'tree, 'path>( |
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586 on_disk: &'on_disk [u8], |
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587 unreachable_bytes: &mut u32, |
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588 root: &'tree mut ChildNodes<'on_disk>, |
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589 path: &'path HgPath, |
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590 to_cow: impl Fn( |
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591 WithBasename<&'path HgPath>, |
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592 ) -> WithBasename<Cow<'on_disk, HgPath>>, |
47120
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|
593 mut each_ancestor: impl FnMut(&mut Node), |
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594 ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> { |
47103
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|
595 let mut child_nodes = root; |
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596 let mut inclusive_ancestor_paths = |
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597 WithBasename::inclusive_ancestors_of(path); |
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598 let mut ancestor_path = inclusive_ancestor_paths |
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599 .next() |
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600 .expect("expected at least one inclusive ancestor"); |
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601 loop { |
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602 let (_, child_node) = child_nodes |
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603 .make_mut(on_disk, unreachable_bytes)? |
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604 .raw_entry_mut() |
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605 .from_key(ancestor_path.base_name()) |
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606 .or_insert_with(|| (to_cow(ancestor_path), Node::default())); |
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607 if let Some(next) = inclusive_ancestor_paths.next() { |
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608 each_ancestor(child_node); |
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609 ancestor_path = next; |
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610 child_nodes = &mut child_node.children; |
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611 } else { |
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612 return Ok(child_node); |
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613 } |
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614 } |
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615 } |
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616 |
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617 fn reset_state( |
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618 &mut self, |
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619 filename: &HgPath, |
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620 old_entry_opt: Option<DirstateEntry>, |
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621 wc_tracked: bool, |
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622 p1_tracked: bool, |
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623 p2_info: bool, |
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624 has_meaningful_mtime: bool, |
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625 parent_file_data_opt: Option<ParentFileData>, |
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626 ) -> Result<(), DirstateError> { |
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627 let (had_entry, was_tracked) = match old_entry_opt { |
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628 Some(old_entry) => (true, old_entry.tracked()), |
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629 None => (false, false), |
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630 }; |
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631 let node = Self::get_or_insert_node( |
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632 self.on_disk, |
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633 &mut self.unreachable_bytes, |
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634 &mut self.root, |
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635 filename, |
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636 WithBasename::to_cow_owned, |
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637 |ancestor| { |
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638 if !had_entry { |
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639 ancestor.descendants_with_entry_count += 1; |
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640 } |
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641 if was_tracked { |
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642 if !wc_tracked { |
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643 ancestor.tracked_descendants_count = ancestor |
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644 .tracked_descendants_count |
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645 .checked_sub(1) |
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646 .expect("tracked count to be >= 0"); |
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647 } |
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648 } else { |
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649 if wc_tracked { |
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650 ancestor.tracked_descendants_count += 1; |
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651 } |
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652 } |
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653 }, |
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654 )?; |
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655 |
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656 let v2_data = if let Some(parent_file_data) = parent_file_data_opt { |
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657 DirstateV2Data { |
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658 wc_tracked, |
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659 p1_tracked, |
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660 p2_info, |
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661 mode_size: parent_file_data.mode_size, |
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662 mtime: if has_meaningful_mtime { |
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663 parent_file_data.mtime |
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664 } else { |
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665 None |
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666 }, |
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667 ..Default::default() |
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668 } |
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669 } else { |
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670 DirstateV2Data { |
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671 wc_tracked, |
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672 p1_tracked, |
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673 p2_info, |
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674 ..Default::default() |
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675 } |
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676 }; |
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677 if !had_entry { |
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678 self.nodes_with_entry_count += 1; |
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679 } |
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680 node.data = NodeData::Entry(DirstateEntry::from_v2_data(v2_data)); |
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681 Ok(()) |
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682 } |
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683 |
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684 fn set_tracked( |
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685 &mut self, |
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686 filename: &HgPath, |
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687 old_entry_opt: Option<DirstateEntry>, |
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688 ) -> Result<bool, DirstateV2ParseError> { |
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689 let was_tracked = old_entry_opt.map_or(false, |e| e.tracked()); |
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690 let had_entry = old_entry_opt.is_some(); |
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691 let tracked_count_increment = if was_tracked { 0 } else { 1 }; |
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692 let mut new = false; |
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693 |
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694 let node = Self::get_or_insert_node( |
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695 self.on_disk, |
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696 &mut self.unreachable_bytes, |
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697 &mut self.root, |
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698 filename, |
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699 WithBasename::to_cow_owned, |
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700 |ancestor| { |
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701 if !had_entry { |
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702 ancestor.descendants_with_entry_count += 1; |
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703 } |
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704 |
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705 ancestor.tracked_descendants_count += tracked_count_increment; |
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706 }, |
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707 )?; |
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708 let new_entry = if let Some(old_entry) = old_entry_opt { |
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709 let mut e = old_entry.clone(); |
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710 if e.tracked() { |
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711 // XXX |
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712 // This is probably overkill for more case, but we need this to |
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713 // fully replace the `normallookup` call with `set_tracked` |
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714 // one. Consider smoothing this in the future. |
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715 e.set_possibly_dirty(); |
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716 } else { |
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717 new = true; |
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718 e.set_tracked(); |
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719 } |
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720 e |
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721 } else { |
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722 self.nodes_with_entry_count += 1; |
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723 new = true; |
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724 DirstateEntry::new_tracked() |
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725 }; |
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726 node.data = NodeData::Entry(new_entry); |
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727 Ok(new) |
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728 } |
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729 |
49108
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730 /// It is the responsibility of the caller to know that there was an entry |
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731 /// there before. Does not handle the removal of copy source |
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732 fn set_untracked( |
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733 &mut self, |
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734 filename: &HgPath, |
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735 old_entry: DirstateEntry, |
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736 ) -> Result<(), DirstateV2ParseError> { |
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737 let node = Self::get_or_insert_node( |
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738 self.on_disk, |
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739 &mut self.unreachable_bytes, |
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740 &mut self.root, |
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741 filename, |
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742 WithBasename::to_cow_owned, |
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743 |ancestor| { |
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744 ancestor.tracked_descendants_count = ancestor |
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745 .tracked_descendants_count |
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746 .checked_sub(1) |
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747 .expect("tracked_descendants_count should be >= 0"); |
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748 }, |
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749 )?; |
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750 let mut new_entry = old_entry.clone(); |
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751 new_entry.set_untracked(); |
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752 node.data = NodeData::Entry(new_entry); |
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753 Ok(()) |
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754 } |
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755 |
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756 fn set_clean( |
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757 &mut self, |
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758 filename: &HgPath, |
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759 old_entry: DirstateEntry, |
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760 mode: u32, |
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761 size: u32, |
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762 mtime: TruncatedTimestamp, |
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763 ) -> Result<(), DirstateError> { |
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764 let node = Self::get_or_insert_node( |
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765 self.on_disk, |
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766 &mut self.unreachable_bytes, |
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767 &mut self.root, |
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768 filename, |
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769 WithBasename::to_cow_owned, |
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770 |ancestor| { |
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771 if !old_entry.tracked() { |
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772 ancestor.tracked_descendants_count += 1; |
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773 } |
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774 }, |
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775 )?; |
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776 let mut new_entry = old_entry.clone(); |
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777 new_entry.set_clean(mode, size, mtime); |
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778 node.data = NodeData::Entry(new_entry); |
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779 Ok(()) |
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780 } |
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781 |
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782 fn set_possibly_dirty( |
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783 &mut self, |
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784 filename: &HgPath, |
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785 ) -> Result<(), DirstateError> { |
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786 let node = Self::get_or_insert_node( |
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787 self.on_disk, |
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788 &mut self.unreachable_bytes, |
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789 &mut self.root, |
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790 filename, |
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791 WithBasename::to_cow_owned, |
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792 |_ancestor| {}, |
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793 )?; |
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794 let entry = node.data.as_entry_mut().expect("entry should exist"); |
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795 entry.set_possibly_dirty(); |
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796 node.data = NodeData::Entry(*entry); |
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797 Ok(()) |
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798 } |
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799 |
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800 fn iter_nodes<'tree>( |
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801 &'tree self, |
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802 ) -> impl Iterator< |
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803 Item = Result<NodeRef<'tree, 'on_disk>, DirstateV2ParseError>, |
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804 > + 'tree { |
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805 // Depth first tree traversal. |
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806 // |
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807 // If we could afford internal iteration and recursion, |
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808 // this would look like: |
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809 // |
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810 // ``` |
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811 // fn traverse_children( |
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812 // children: &ChildNodes, |
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813 // each: &mut impl FnMut(&Node), |
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814 // ) { |
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815 // for child in children.values() { |
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816 // traverse_children(&child.children, each); |
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817 // each(child); |
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818 // } |
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819 // } |
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820 // ``` |
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821 // |
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822 // However we want an external iterator and therefore can’t use the |
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823 // call stack. Use an explicit stack instead: |
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824 let mut stack = Vec::new(); |
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825 let mut iter = self.root.as_ref().iter(); |
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826 std::iter::from_fn(move || { |
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827 while let Some(child_node) = iter.next() { |
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828 let children = match child_node.children(self.on_disk) { |
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829 Ok(children) => children, |
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830 Err(error) => return Some(Err(error)), |
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831 }; |
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832 // Pseudo-recursion |
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833 let new_iter = children.iter(); |
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834 let old_iter = std::mem::replace(&mut iter, new_iter); |
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835 stack.push((child_node, old_iter)); |
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836 } |
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837 // Found the end of a `children.iter()` iterator. |
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838 if let Some((child_node, next_iter)) = stack.pop() { |
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839 // "Return" from pseudo-recursion by restoring state from the |
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840 // explicit stack |
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841 iter = next_iter; |
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842 |
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843 Some(Ok(child_node)) |
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844 } else { |
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845 // Reached the bottom of the stack, we’re done |
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846 None |
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847 } |
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848 }) |
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849 } |
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850 |
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851 fn count_dropped_path(unreachable_bytes: &mut u32, path: &Cow<HgPath>) { |
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852 if let Cow::Borrowed(path) = path { |
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853 *unreachable_bytes += path.len() as u32 |
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854 } |
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855 } |
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856 } |
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857 |
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858 /// Like `Iterator::filter_map`, but over a fallible iterator of `Result`s. |
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859 /// |
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860 /// The callback is only called for incoming `Ok` values. Errors are passed |
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861 /// through as-is. In order to let it use the `?` operator the callback is |
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862 /// expected to return a `Result` of `Option`, instead of an `Option` of |
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863 /// `Result`. |
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864 fn filter_map_results<'a, I, F, A, B, E>( |
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865 iter: I, |
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866 f: F, |
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867 ) -> impl Iterator<Item = Result<B, E>> + 'a |
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868 where |
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869 I: Iterator<Item = Result<A, E>> + 'a, |
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870 F: Fn(A) -> Result<Option<B>, E> + 'a, |
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871 { |
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872 iter.filter_map(move |result| match result { |
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873 Ok(node) => f(node).transpose(), |
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874 Err(e) => Some(Err(e)), |
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875 }) |
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876 } |
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877 |
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878 impl OwningDirstateMap { |
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879 pub fn clear(&mut self) { |
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880 self.with_dmap_mut(|map| { |
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881 map.root = Default::default(); |
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882 map.nodes_with_entry_count = 0; |
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883 map.nodes_with_copy_source_count = 0; |
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884 }); |
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885 } |
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886 |
49097
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887 pub fn set_tracked( |
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888 &mut self, |
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889 filename: &HgPath, |
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890 ) -> Result<bool, DirstateV2ParseError> { |
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891 let old_entry_opt = self.get(filename)?; |
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892 self.with_dmap_mut(|map| map.set_tracked(filename, old_entry_opt)) |
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893 } |
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894 |
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895 pub fn set_untracked( |
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896 &mut self, |
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897 filename: &HgPath, |
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898 ) -> Result<bool, DirstateError> { |
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899 let old_entry_opt = self.get(filename)?; |
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900 match old_entry_opt { |
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901 None => Ok(false), |
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902 Some(old_entry) => { |
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903 if !old_entry.tracked() { |
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904 // `DirstateMap::set_untracked` is not a noop if |
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905 // already not tracked as it will decrement the |
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906 // tracked counters while going down. |
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907 return Ok(true); |
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908 } |
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909 if old_entry.added() { |
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910 // Untracking an "added" entry will just result in a |
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911 // worthless entry (and other parts of the code will |
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912 // complain about it), just drop it entirely. |
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913 self.drop_entry_and_copy_source(filename)?; |
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914 return Ok(true); |
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915 } |
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diff
changeset
|
916 if !old_entry.p2_info() { |
119c7e2b4248
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|
917 self.copy_map_remove(filename)?; |
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|
918 } |
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|
919 |
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|
920 self.with_dmap_mut(|map| { |
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|
921 map.set_untracked(filename, old_entry)?; |
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|
922 Ok(true) |
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|
923 }) |
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|
924 } |
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|
925 } |
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|
926 } |
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|
927 |
49104
b5c2aca84618
rust-dirstatemap: add `set_clean` method
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|
928 pub fn set_clean( |
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|
929 &mut self, |
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|
930 filename: &HgPath, |
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|
931 mode: u32, |
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|
932 size: u32, |
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|
933 mtime: TruncatedTimestamp, |
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|
934 ) -> Result<(), DirstateError> { |
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|
935 let old_entry = match self.get(filename)? { |
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|
936 None => { |
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|
937 return Err( |
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|
938 DirstateMapError::PathNotFound(filename.into()).into() |
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|
939 ) |
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|
940 } |
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|
941 Some(e) => e, |
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|
942 }; |
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|
943 self.copy_map_remove(filename)?; |
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|
944 self.with_dmap_mut(|map| { |
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|
945 map.set_clean(filename, old_entry, mode, size, mtime) |
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|
946 }) |
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|
947 } |
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|
948 |
49106
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|
949 pub fn set_possibly_dirty( |
c1a3fdedc492
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|
950 &mut self, |
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951 filename: &HgPath, |
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|
952 ) -> Result<(), DirstateError> { |
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953 if self.get(filename)?.is_none() { |
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|
954 return Err(DirstateMapError::PathNotFound(filename.into()).into()); |
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955 } |
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956 self.with_dmap_mut(|map| map.set_possibly_dirty(filename)) |
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957 } |
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958 |
49101
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959 pub fn reset_state( |
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960 &mut self, |
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961 filename: &HgPath, |
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962 wc_tracked: bool, |
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963 p1_tracked: bool, |
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964 p2_info: bool, |
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965 has_meaningful_mtime: bool, |
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966 parent_file_data_opt: Option<ParentFileData>, |
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967 ) -> Result<(), DirstateError> { |
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968 if !(p1_tracked || p2_info || wc_tracked) { |
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969 self.drop_entry_and_copy_source(filename)?; |
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970 return Ok(()); |
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971 } |
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972 self.copy_map_remove(filename)?; |
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973 let old_entry_opt = self.get(filename)?; |
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974 self.with_dmap_mut(|map| { |
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975 map.reset_state( |
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976 filename, |
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|
977 old_entry_opt, |
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978 wc_tracked, |
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979 p1_tracked, |
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980 p2_info, |
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981 has_meaningful_mtime, |
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982 parent_file_data_opt, |
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983 ) |
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984 }) |
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985 } |
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986 |
48069
3d0a9c6e614d
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|
987 pub fn drop_entry_and_copy_source( |
48050
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988 &mut self, |
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989 filename: &HgPath, |
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990 ) -> Result<(), DirstateError> { |
48026
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991 let was_tracked = self |
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992 .get(filename)? |
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|
993 .map_or(false, |e| e.state().is_tracked()); |
47192
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994 struct Dropped { |
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995 was_tracked: bool, |
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996 had_entry: bool, |
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997 had_copy_source: bool, |
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|
998 } |
47352
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|
999 |
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1000 /// If this returns `Ok(Some((dropped, removed)))`, then |
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1001 /// |
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1002 /// * `dropped` is about the leaf node that was at `filename` |
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1003 /// * `removed` is whether this particular level of recursion just |
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1004 /// removed a node in `nodes`. |
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1005 fn recur<'on_disk>( |
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1006 on_disk: &'on_disk [u8], |
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1007 unreachable_bytes: &mut u32, |
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1008 nodes: &mut ChildNodes<'on_disk>, |
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|
1009 path: &HgPath, |
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|
1010 ) -> Result<Option<(Dropped, bool)>, DirstateV2ParseError> { |
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1011 let (first_path_component, rest_of_path) = |
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1012 path.split_first_component(); |
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1013 let nodes = nodes.make_mut(on_disk, unreachable_bytes)?; |
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1014 let node = if let Some(node) = nodes.get_mut(first_path_component) |
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1015 { |
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1016 node |
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1017 } else { |
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1018 return Ok(None); |
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1019 }; |
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1020 let dropped; |
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1021 if let Some(rest) = rest_of_path { |
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1022 if let Some((d, removed)) = recur( |
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1023 on_disk, |
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1024 unreachable_bytes, |
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1025 &mut node.children, |
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1026 rest, |
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1027 )? { |
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1028 dropped = d; |
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1029 if dropped.had_entry { |
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1030 node.descendants_with_entry_count = node |
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1031 .descendants_with_entry_count |
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1032 .checked_sub(1) |
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1033 .expect( |
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1034 "descendants_with_entry_count should be >= 0", |
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1035 ); |
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1036 } |
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1037 if dropped.was_tracked { |
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1038 node.tracked_descendants_count = node |
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1039 .tracked_descendants_count |
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1040 .checked_sub(1) |
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1041 .expect( |
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1042 "tracked_descendants_count should be >= 0", |
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1043 ); |
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1044 } |
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1045 |
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1046 // Directory caches must be invalidated when removing a |
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1047 // child node |
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1048 if removed { |
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1049 if let NodeData::CachedDirectory { .. } = &node.data { |
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1050 node.data = NodeData::None |
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1051 } |
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1052 } |
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1053 } else { |
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1054 return Ok(None); |
47120
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1055 } |
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1056 } else { |
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1057 let entry = node.data.as_entry(); |
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1058 let was_tracked = entry.map_or(false, |entry| entry.tracked()); |
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1059 let had_entry = entry.is_some(); |
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1060 if had_entry { |
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1061 node.data = NodeData::None |
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1062 } |
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1063 let mut had_copy_source = false; |
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1064 if let Some(source) = &node.copy_source { |
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1065 DirstateMap::count_dropped_path(unreachable_bytes, source); |
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1066 had_copy_source = true; |
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1067 node.copy_source = None |
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1068 } |
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1069 dropped = Dropped { |
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1070 was_tracked, |
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1071 had_entry, |
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1072 had_copy_source, |
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1073 }; |
47193
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1074 } |
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1075 // After recursion, for both leaf (rest_of_path is None) nodes and |
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1076 // parent nodes, remove a node if it just became empty. |
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1077 let remove = !node.data.has_entry() |
47193
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1078 && node.copy_source.is_none() |
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1079 && node.children.is_empty(); |
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1080 if remove { |
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1081 let (key, _) = |
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1082 nodes.remove_entry(first_path_component).unwrap(); |
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1083 DirstateMap::count_dropped_path( |
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1084 unreachable_bytes, |
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1085 key.full_path(), |
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1086 ) |
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1087 } |
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1088 Ok(Some((dropped, remove))) |
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1089 } |
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1090 |
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1091 self.with_dmap_mut(|map| { |
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1092 if let Some((dropped, _removed)) = recur( |
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1093 map.on_disk, |
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1094 &mut map.unreachable_bytes, |
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1095 &mut map.root, |
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1096 filename, |
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1097 )? { |
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1098 if dropped.had_entry { |
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1099 map.nodes_with_entry_count = map |
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1100 .nodes_with_entry_count |
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1101 .checked_sub(1) |
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1102 .expect("nodes_with_entry_count should be >= 0"); |
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1103 } |
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1104 if dropped.had_copy_source { |
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1105 map.nodes_with_copy_source_count = map |
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1106 .nodes_with_copy_source_count |
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1107 .checked_sub(1) |
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1108 .expect("nodes_with_copy_source_count should be >= 0"); |
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1109 } |
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1110 } else { |
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1111 debug_assert!(!was_tracked); |
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1112 } |
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1113 Ok(()) |
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1114 }) |
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1115 } |
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1116 |
48069
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1117 pub fn has_tracked_dir( |
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1118 &mut self, |
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1119 directory: &HgPath, |
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1120 ) -> Result<bool, DirstateError> { |
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1121 self.with_dmap_mut(|map| { |
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1122 if let Some(node) = map.get_node(directory)? { |
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1123 // A node without a `DirstateEntry` was created to hold child |
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1124 // nodes, and is therefore a directory. |
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1125 let state = node.state()?; |
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1126 Ok(state.is_none() && node.tracked_descendants_count() > 0) |
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1127 } else { |
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1128 Ok(false) |
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1129 } |
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1130 }) |
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1131 } |
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1132 |
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1133 pub fn has_dir( |
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1134 &mut self, |
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1135 directory: &HgPath, |
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1136 ) -> Result<bool, DirstateError> { |
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1137 self.with_dmap_mut(|map| { |
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1138 if let Some(node) = map.get_node(directory)? { |
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1139 // A node without a `DirstateEntry` was created to hold child |
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1140 // nodes, and is therefore a directory. |
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1141 let state = node.state()?; |
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1142 Ok(state.is_none() && node.descendants_with_entry_count() > 0) |
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1143 } else { |
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1144 Ok(false) |
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1145 } |
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1146 }) |
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1147 } |
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1148 |
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1149 #[timed] |
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1150 pub fn pack_v1( |
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1151 &self, |
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1152 parents: DirstateParents, |
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1153 ) -> Result<Vec<u8>, DirstateError> { |
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1154 let map = self.get_map(); |
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1155 // Optizimation (to be measured?): pre-compute size to avoid `Vec` |
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1156 // reallocations |
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1157 let mut size = parents.as_bytes().len(); |
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1158 for node in map.iter_nodes() { |
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1159 let node = node?; |
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1160 if node.entry()?.is_some() { |
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1161 size += packed_entry_size( |
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1162 node.full_path(map.on_disk)?, |
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1163 node.copy_source(map.on_disk)?, |
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1164 ); |
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1165 } |
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1166 } |
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1167 |
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1168 let mut packed = Vec::with_capacity(size); |
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1169 packed.extend(parents.as_bytes()); |
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1170 |
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1171 for node in map.iter_nodes() { |
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1172 let node = node?; |
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1173 if let Some(entry) = node.entry()? { |
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1174 pack_entry( |
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1175 node.full_path(map.on_disk)?, |
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1176 &entry, |
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1177 node.copy_source(map.on_disk)?, |
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1178 &mut packed, |
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1179 ); |
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1180 } |
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1181 } |
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1182 Ok(packed) |
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1183 } |
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1184 |
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1185 /// Returns new data and metadata together with whether that data should be |
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1186 /// appended to the existing data file whose content is at |
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1187 /// `map.on_disk` (true), instead of written to a new data file |
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1188 /// (false). |
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1189 #[timed] |
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1190 pub fn pack_v2( |
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1191 &self, |
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1192 can_append: bool, |
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1193 ) -> Result<(Vec<u8>, on_disk::TreeMetadata, bool), DirstateError> { |
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1194 let map = self.get_map(); |
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1195 on_disk::write(map, can_append) |
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1196 } |
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1197 |
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1198 /// `callback` allows the caller to process and do something with the |
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1199 /// results of the status. This is needed to do so efficiently (i.e. |
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1200 /// without cloning the `DirstateStatus` object with its paths) because |
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1201 /// we need to borrow from `Self`. |
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1202 pub fn with_status<R>( |
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1203 &mut self, |
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1204 matcher: &(dyn Matcher + Sync), |
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1205 root_dir: PathBuf, |
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1206 ignore_files: Vec<PathBuf>, |
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1207 options: StatusOptions, |
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1208 callback: impl for<'r> FnOnce( |
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1209 Result<(DirstateStatus<'r>, Vec<PatternFileWarning>), StatusError>, |
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1210 ) -> R, |
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1211 ) -> R { |
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1212 self.with_dmap_mut(|map| { |
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1213 callback(super::status::status( |
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1214 map, |
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1215 matcher, |
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1216 root_dir, |
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1217 ignore_files, |
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1218 options, |
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1219 )) |
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1220 }) |
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1221 } |
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1222 |
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1223 pub fn copy_map_len(&self) -> usize { |
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1224 let map = self.get_map(); |
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1225 map.nodes_with_copy_source_count as usize |
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1226 } |
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1227 |
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1228 pub fn copy_map_iter(&self) -> CopyMapIter<'_> { |
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1229 let map = self.get_map(); |
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1230 Box::new(filter_map_results(map.iter_nodes(), move |node| { |
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1231 Ok(if let Some(source) = node.copy_source(map.on_disk)? { |
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1232 Some((node.full_path(map.on_disk)?, source)) |
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1233 } else { |
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1234 None |
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1235 }) |
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1236 })) |
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1237 } |
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1238 |
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1239 pub fn copy_map_contains_key( |
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1240 &self, |
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1241 key: &HgPath, |
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1242 ) -> Result<bool, DirstateV2ParseError> { |
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1243 let map = self.get_map(); |
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1244 Ok(if let Some(node) = map.get_node(key)? { |
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1245 node.has_copy_source() |
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1246 } else { |
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1247 false |
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1248 }) |
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1249 } |
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1250 |
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1251 pub fn copy_map_get( |
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1252 &self, |
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1253 key: &HgPath, |
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1254 ) -> Result<Option<&HgPath>, DirstateV2ParseError> { |
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1255 let map = self.get_map(); |
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1256 if let Some(node) = map.get_node(key)? { |
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1257 if let Some(source) = node.copy_source(map.on_disk)? { |
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1258 return Ok(Some(source)); |
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1259 } |
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1260 } |
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1261 Ok(None) |
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1262 } |
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1263 |
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1264 pub fn copy_map_remove( |
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1265 &mut self, |
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1266 key: &HgPath, |
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1267 ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
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1268 self.with_dmap_mut(|map| { |
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1269 let count = &mut map.nodes_with_copy_source_count; |
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1270 let unreachable_bytes = &mut map.unreachable_bytes; |
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1271 Ok(DirstateMap::get_node_mut( |
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1272 map.on_disk, |
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1273 unreachable_bytes, |
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1274 &mut map.root, |
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1275 key, |
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1276 )? |
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1277 .and_then(|node| { |
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1278 if let Some(source) = &node.copy_source { |
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1279 *count -= 1; |
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1280 DirstateMap::count_dropped_path(unreachable_bytes, source); |
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1281 } |
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1282 node.copy_source.take().map(Cow::into_owned) |
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1283 })) |
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1284 }) |
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1285 } |
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1286 |
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1287 pub fn copy_map_insert( |
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1288 &mut self, |
47104
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1289 key: HgPathBuf, |
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1290 value: HgPathBuf, |
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1291 ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
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1292 self.with_dmap_mut(|map| { |
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1293 let node = DirstateMap::get_or_insert_node( |
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1294 map.on_disk, |
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1295 &mut map.unreachable_bytes, |
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1296 &mut map.root, |
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1297 &key, |
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1298 WithBasename::to_cow_owned, |
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1299 |_ancestor| {}, |
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1300 )?; |
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1301 if node.copy_source.is_none() { |
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1302 map.nodes_with_copy_source_count += 1 |
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1303 } |
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1304 Ok(node.copy_source.replace(value.into()).map(Cow::into_owned)) |
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1305 }) |
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1306 } |
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1307 |
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1308 pub fn len(&self) -> usize { |
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1309 let map = self.get_map(); |
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1310 map.nodes_with_entry_count as usize |
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1311 } |
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1312 |
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1313 pub fn contains_key( |
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1314 &self, |
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1315 key: &HgPath, |
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1316 ) -> Result<bool, DirstateV2ParseError> { |
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1317 Ok(self.get(key)?.is_some()) |
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1318 } |
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1319 |
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1320 pub fn get( |
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1321 &self, |
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1322 key: &HgPath, |
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1323 ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
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1324 let map = self.get_map(); |
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1325 Ok(if let Some(node) = map.get_node(key)? { |
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1326 node.entry()? |
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1327 } else { |
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1328 None |
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1329 }) |
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1330 } |
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1331 |
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1332 pub fn iter(&self) -> StateMapIter<'_> { |
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1333 let map = self.get_map(); |
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1334 Box::new(filter_map_results(map.iter_nodes(), move |node| { |
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1335 Ok(if let Some(entry) = node.entry()? { |
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1336 Some((node.full_path(map.on_disk)?, entry)) |
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1337 } else { |
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1338 None |
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1339 }) |
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1340 })) |
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1341 } |
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1342 |
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1343 pub fn iter_tracked_dirs( |
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1344 &mut self, |
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1345 ) -> Result< |
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1346 Box< |
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1347 dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> |
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1348 + Send |
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1349 + '_, |
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1350 >, |
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1351 DirstateError, |
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1352 > { |
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1353 let map = self.get_map(); |
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1354 let on_disk = map.on_disk; |
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1355 Ok(Box::new(filter_map_results( |
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1356 map.iter_nodes(), |
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1357 move |node| { |
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1358 Ok(if node.tracked_descendants_count() > 0 { |
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1359 Some(node.full_path(on_disk)?) |
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1360 } else { |
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1361 None |
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1362 }) |
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1363 }, |
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1364 ))) |
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1365 } |
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1366 |
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1367 /// Only public because it needs to be exposed to the Python layer. |
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1368 /// It is not the full `setparents` logic, only the parts that mutate the |
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1369 /// entries. |
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1370 pub fn setparents_fixup( |
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1371 &mut self, |
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1372 ) -> Result<Vec<(HgPathBuf, HgPathBuf)>, DirstateV2ParseError> { |
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1373 // XXX |
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1374 // All the copying and re-querying is quite inefficient, but this is |
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1375 // still a lot better than doing it from Python. |
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1376 // |
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1377 // The better solution is to develop a mechanism for `iter_mut`, |
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1378 // which will be a lot more involved: we're dealing with a lazy, |
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1379 // append-mostly, tree-like data structure. This will do for now. |
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1380 let mut copies = vec![]; |
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1381 let mut files_with_p2_info = vec![]; |
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1382 for res in self.iter() { |
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1383 let (path, entry) = res?; |
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1384 if entry.p2_info() { |
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1385 files_with_p2_info.push(path.to_owned()) |
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1386 } |
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1387 } |
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1388 self.with_dmap_mut(|map| { |
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1389 for path in files_with_p2_info.iter() { |
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1390 let node = map.get_or_insert(path)?; |
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1391 let entry = |
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1392 node.data.as_entry_mut().expect("entry should exist"); |
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1393 entry.drop_merge_data(); |
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1394 if let Some(source) = node.copy_source.take().as_deref() { |
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1395 copies.push((path.to_owned(), source.to_owned())); |
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1396 } |
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1397 } |
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1398 Ok(copies) |
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1399 }) |
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1400 } |
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1401 |
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1402 pub fn debug_iter( |
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1403 &self, |
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1404 all: bool, |
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1405 ) -> Box< |
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1406 dyn Iterator< |
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1407 Item = Result< |
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1408 (&HgPath, (u8, i32, i32, i32)), |
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1409 DirstateV2ParseError, |
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1410 >, |
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1411 > + Send |
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1412 + '_, |
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1413 > { |
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1414 let map = self.get_map(); |
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1415 Box::new(filter_map_results(map.iter_nodes(), move |node| { |
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1416 let debug_tuple = if let Some(entry) = node.entry()? { |
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1417 entry.debug_tuple() |
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1418 } else if !all { |
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1419 return Ok(None); |
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1420 } else if let Some(mtime) = node.cached_directory_mtime()? { |
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1421 (b' ', 0, -1, mtime.truncated_seconds() as i32) |
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1422 } else { |
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1423 (b' ', 0, -1, -1) |
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1424 }; |
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1425 Ok(Some((node.full_path(map.on_disk)?, debug_tuple))) |
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1426 })) |
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1427 } |
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1428 } |