Mercurial > hg
annotate rust/hg-core/src/dirstate_tree/dirstate_map.rs @ 48046:f6d0a89fdf80
dirstate: Don’t drop unrelated data in DirstateMap::set_entry
For example, copy source are handled separately. Removing it goes through
the `copy_map_remove` method (exposed to Python as `.copymap.pop()`)
Differential Revision: https://phab.mercurial-scm.org/D11488
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Wed, 22 Sep 2021 18:42:00 +0200 |
parents | 32ef647821b2 |
children | 9b2a51b2c36a |
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1 use bytes_cast::BytesCast; |
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2 use micro_timer::timed; |
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3 use std::borrow::Cow; |
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4 use std::convert::TryInto; |
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5 use std::path::PathBuf; |
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6 |
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7 use super::on_disk; |
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8 use super::on_disk::DirstateV2ParseError; |
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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::parsers::Timestamp; |
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14 use crate::dirstate::MTIME_UNSET; |
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15 use crate::dirstate::SIZE_FROM_OTHER_PARENT; |
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16 use crate::dirstate::SIZE_NON_NORMAL; |
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17 use crate::dirstate::V1_RANGEMASK; |
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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::CopyMapIter; |
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21 use crate::DirstateEntry; |
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22 use crate::DirstateError; |
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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::FastHashMap; |
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27 use crate::PatternFileWarning; |
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28 use crate::StateMapIter; |
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29 use crate::StatusError; |
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30 use crate::StatusOptions; |
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31 |
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32 /// Append to an existing data file if the amount of unreachable data (not used |
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33 /// anymore) is less than this fraction of the total amount of existing data. |
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34 const ACCEPTABLE_UNREACHABLE_BYTES_RATIO: f32 = 0.5; |
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35 |
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36 pub struct DirstateMap<'on_disk> { |
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37 /// Contents of the `.hg/dirstate` file |
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38 pub(super) on_disk: &'on_disk [u8], |
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39 |
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40 pub(super) root: ChildNodes<'on_disk>, |
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41 |
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42 /// Number of nodes anywhere in the tree that have `.entry.is_some()`. |
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43 pub(super) nodes_with_entry_count: u32, |
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44 |
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45 /// Number of nodes anywhere in the tree that have |
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46 /// `.copy_source.is_some()`. |
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47 pub(super) nodes_with_copy_source_count: u32, |
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48 |
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49 /// See on_disk::Header |
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50 pub(super) ignore_patterns_hash: on_disk::IgnorePatternsHash, |
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51 |
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52 /// How many bytes of `on_disk` are not used anymore |
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53 pub(super) unreachable_bytes: u32, |
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54 } |
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55 |
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56 /// Using a plain `HgPathBuf` of the full path from the repository root as a |
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57 /// map key would also work: all paths in a given map have the same parent |
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58 /// path, so comparing full paths gives the same result as comparing base |
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59 /// names. However `HashMap` would waste time always re-hashing the same |
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60 /// string prefix. |
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61 pub(super) type NodeKey<'on_disk> = WithBasename<Cow<'on_disk, HgPath>>; |
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62 |
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63 /// Similar to `&'tree Cow<'on_disk, HgPath>`, but can also be returned |
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64 /// for on-disk nodes that don’t actually have a `Cow` to borrow. |
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65 pub(super) enum BorrowedPath<'tree, 'on_disk> { |
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66 InMemory(&'tree HgPathBuf), |
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67 OnDisk(&'on_disk HgPath), |
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68 } |
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69 |
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70 pub(super) enum ChildNodes<'on_disk> { |
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71 InMemory(FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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72 OnDisk(&'on_disk [on_disk::Node]), |
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73 } |
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74 |
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75 pub(super) enum ChildNodesRef<'tree, 'on_disk> { |
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76 InMemory(&'tree FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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77 OnDisk(&'on_disk [on_disk::Node]), |
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78 } |
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79 |
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80 pub(super) enum NodeRef<'tree, 'on_disk> { |
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81 InMemory(&'tree NodeKey<'on_disk>, &'tree Node<'on_disk>), |
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82 OnDisk(&'on_disk on_disk::Node), |
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83 } |
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84 |
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85 impl<'tree, 'on_disk> BorrowedPath<'tree, 'on_disk> { |
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86 pub fn detach_from_tree(&self) -> Cow<'on_disk, HgPath> { |
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87 match *self { |
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88 BorrowedPath::InMemory(in_memory) => Cow::Owned(in_memory.clone()), |
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89 BorrowedPath::OnDisk(on_disk) => Cow::Borrowed(on_disk), |
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90 } |
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91 } |
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92 } |
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93 |
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94 impl<'tree, 'on_disk> std::ops::Deref for BorrowedPath<'tree, 'on_disk> { |
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95 type Target = HgPath; |
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96 |
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97 fn deref(&self) -> &HgPath { |
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98 match *self { |
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99 BorrowedPath::InMemory(in_memory) => in_memory, |
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100 BorrowedPath::OnDisk(on_disk) => on_disk, |
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101 } |
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102 } |
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103 } |
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104 |
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105 impl Default for ChildNodes<'_> { |
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106 fn default() -> Self { |
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107 ChildNodes::InMemory(Default::default()) |
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108 } |
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109 } |
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110 |
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111 impl<'on_disk> ChildNodes<'on_disk> { |
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112 pub(super) fn as_ref<'tree>( |
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113 &'tree self, |
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114 ) -> ChildNodesRef<'tree, 'on_disk> { |
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115 match self { |
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116 ChildNodes::InMemory(nodes) => ChildNodesRef::InMemory(nodes), |
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117 ChildNodes::OnDisk(nodes) => ChildNodesRef::OnDisk(nodes), |
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118 } |
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119 } |
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120 |
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121 pub(super) fn is_empty(&self) -> bool { |
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122 match self { |
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123 ChildNodes::InMemory(nodes) => nodes.is_empty(), |
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124 ChildNodes::OnDisk(nodes) => nodes.is_empty(), |
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125 } |
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126 } |
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127 |
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128 fn make_mut( |
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129 &mut self, |
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130 on_disk: &'on_disk [u8], |
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131 unreachable_bytes: &mut u32, |
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132 ) -> Result< |
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133 &mut FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>, |
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134 DirstateV2ParseError, |
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135 > { |
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136 match self { |
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137 ChildNodes::InMemory(nodes) => Ok(nodes), |
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138 ChildNodes::OnDisk(nodes) => { |
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139 *unreachable_bytes += |
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140 std::mem::size_of_val::<[on_disk::Node]>(nodes) as u32; |
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141 let nodes = nodes |
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142 .iter() |
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143 .map(|node| { |
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144 Ok(( |
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145 node.path(on_disk)?, |
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146 node.to_in_memory_node(on_disk)?, |
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147 )) |
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148 }) |
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149 .collect::<Result<_, _>>()?; |
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150 *self = ChildNodes::InMemory(nodes); |
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151 match self { |
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152 ChildNodes::InMemory(nodes) => Ok(nodes), |
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153 ChildNodes::OnDisk(_) => unreachable!(), |
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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 |
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160 impl<'tree, 'on_disk> ChildNodesRef<'tree, 'on_disk> { |
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161 pub(super) fn get( |
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162 &self, |
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163 base_name: &HgPath, |
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164 on_disk: &'on_disk [u8], |
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165 ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> { |
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166 match self { |
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167 ChildNodesRef::InMemory(nodes) => Ok(nodes |
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168 .get_key_value(base_name) |
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169 .map(|(k, v)| NodeRef::InMemory(k, v))), |
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170 ChildNodesRef::OnDisk(nodes) => { |
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171 let mut parse_result = Ok(()); |
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172 let search_result = nodes.binary_search_by(|node| { |
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173 match node.base_name(on_disk) { |
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174 Ok(node_base_name) => node_base_name.cmp(base_name), |
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175 Err(e) => { |
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176 parse_result = Err(e); |
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177 // Dummy comparison result, `search_result` won’t |
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178 // be used since `parse_result` is an error |
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179 std::cmp::Ordering::Equal |
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180 } |
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181 } |
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182 }); |
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183 parse_result.map(|()| { |
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184 search_result.ok().map(|i| NodeRef::OnDisk(&nodes[i])) |
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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 |
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190 /// Iterate in undefined order |
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191 pub(super) fn iter( |
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192 &self, |
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193 ) -> impl Iterator<Item = NodeRef<'tree, 'on_disk>> { |
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194 match self { |
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195 ChildNodesRef::InMemory(nodes) => itertools::Either::Left( |
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196 nodes.iter().map(|(k, v)| NodeRef::InMemory(k, v)), |
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197 ), |
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198 ChildNodesRef::OnDisk(nodes) => { |
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199 itertools::Either::Right(nodes.iter().map(NodeRef::OnDisk)) |
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200 } |
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201 } |
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202 } |
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203 |
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204 /// Iterate in parallel in undefined order |
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205 pub(super) fn par_iter( |
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206 &self, |
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207 ) -> impl rayon::iter::ParallelIterator<Item = NodeRef<'tree, 'on_disk>> |
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208 { |
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209 use rayon::prelude::*; |
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210 match self { |
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211 ChildNodesRef::InMemory(nodes) => rayon::iter::Either::Left( |
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212 nodes.par_iter().map(|(k, v)| NodeRef::InMemory(k, v)), |
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213 ), |
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214 ChildNodesRef::OnDisk(nodes) => rayon::iter::Either::Right( |
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215 nodes.par_iter().map(NodeRef::OnDisk), |
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216 ), |
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217 } |
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218 } |
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219 |
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220 pub(super) fn sorted(&self) -> Vec<NodeRef<'tree, 'on_disk>> { |
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221 match self { |
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222 ChildNodesRef::InMemory(nodes) => { |
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223 let mut vec: Vec<_> = nodes |
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224 .iter() |
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225 .map(|(k, v)| NodeRef::InMemory(k, v)) |
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226 .collect(); |
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227 fn sort_key<'a>(node: &'a NodeRef) -> &'a HgPath { |
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228 match node { |
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229 NodeRef::InMemory(path, _node) => path.base_name(), |
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230 NodeRef::OnDisk(_) => unreachable!(), |
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231 } |
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232 } |
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233 // `sort_unstable_by_key` doesn’t allow keys borrowing from the |
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234 // value: https://github.com/rust-lang/rust/issues/34162 |
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235 vec.sort_unstable_by(|a, b| sort_key(a).cmp(sort_key(b))); |
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236 vec |
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237 } |
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238 ChildNodesRef::OnDisk(nodes) => { |
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239 // Nodes on disk are already sorted |
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240 nodes.iter().map(NodeRef::OnDisk).collect() |
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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 |
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246 impl<'tree, 'on_disk> NodeRef<'tree, 'on_disk> { |
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247 pub(super) fn full_path( |
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248 &self, |
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249 on_disk: &'on_disk [u8], |
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250 ) -> Result<&'tree HgPath, DirstateV2ParseError> { |
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251 match self { |
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252 NodeRef::InMemory(path, _node) => Ok(path.full_path()), |
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253 NodeRef::OnDisk(node) => node.full_path(on_disk), |
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254 } |
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255 } |
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256 |
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257 /// Returns a `BorrowedPath`, which can be turned into a `Cow<'on_disk, |
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258 /// HgPath>` detached from `'tree` |
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259 pub(super) fn full_path_borrowed( |
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260 &self, |
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261 on_disk: &'on_disk [u8], |
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262 ) -> Result<BorrowedPath<'tree, 'on_disk>, DirstateV2ParseError> { |
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263 match self { |
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264 NodeRef::InMemory(path, _node) => match path.full_path() { |
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265 Cow::Borrowed(on_disk) => Ok(BorrowedPath::OnDisk(on_disk)), |
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266 Cow::Owned(in_memory) => Ok(BorrowedPath::InMemory(in_memory)), |
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267 }, |
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268 NodeRef::OnDisk(node) => { |
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269 Ok(BorrowedPath::OnDisk(node.full_path(on_disk)?)) |
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270 } |
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271 } |
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272 } |
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273 |
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274 pub(super) fn base_name( |
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275 &self, |
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276 on_disk: &'on_disk [u8], |
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277 ) -> Result<&'tree HgPath, DirstateV2ParseError> { |
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278 match self { |
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279 NodeRef::InMemory(path, _node) => Ok(path.base_name()), |
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280 NodeRef::OnDisk(node) => node.base_name(on_disk), |
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281 } |
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282 } |
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283 |
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284 pub(super) fn children( |
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285 &self, |
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286 on_disk: &'on_disk [u8], |
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287 ) -> Result<ChildNodesRef<'tree, 'on_disk>, DirstateV2ParseError> { |
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288 match self { |
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289 NodeRef::InMemory(_path, node) => Ok(node.children.as_ref()), |
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290 NodeRef::OnDisk(node) => { |
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291 Ok(ChildNodesRef::OnDisk(node.children(on_disk)?)) |
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292 } |
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293 } |
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294 } |
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295 |
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296 pub(super) fn has_copy_source(&self) -> bool { |
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297 match self { |
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298 NodeRef::InMemory(_path, node) => node.copy_source.is_some(), |
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299 NodeRef::OnDisk(node) => node.has_copy_source(), |
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300 } |
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301 } |
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302 |
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303 pub(super) fn copy_source( |
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304 &self, |
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305 on_disk: &'on_disk [u8], |
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306 ) -> Result<Option<&'tree HgPath>, DirstateV2ParseError> { |
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307 match self { |
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308 NodeRef::InMemory(_path, node) => { |
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309 Ok(node.copy_source.as_ref().map(|s| &**s)) |
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310 } |
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311 NodeRef::OnDisk(node) => node.copy_source(on_disk), |
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312 } |
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313 } |
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314 |
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315 pub(super) fn entry( |
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316 &self, |
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317 ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
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318 match self { |
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319 NodeRef::InMemory(_path, node) => { |
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320 Ok(node.data.as_entry().copied()) |
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321 } |
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322 NodeRef::OnDisk(node) => node.entry(), |
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323 } |
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324 } |
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325 |
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326 pub(super) fn state( |
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327 &self, |
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328 ) -> Result<Option<EntryState>, DirstateV2ParseError> { |
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329 match self { |
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330 NodeRef::InMemory(_path, node) => { |
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331 Ok(node.data.as_entry().map(|entry| entry.state())) |
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332 } |
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333 NodeRef::OnDisk(node) => node.state(), |
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334 } |
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335 } |
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336 |
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337 pub(super) fn cached_directory_mtime( |
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338 &self, |
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339 ) -> Option<&'tree on_disk::Timestamp> { |
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340 match self { |
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341 NodeRef::InMemory(_path, node) => match &node.data { |
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342 NodeData::CachedDirectory { mtime } => Some(mtime), |
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343 _ => None, |
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344 }, |
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345 NodeRef::OnDisk(node) => node.cached_directory_mtime(), |
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346 } |
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347 } |
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348 |
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349 pub(super) fn descendants_with_entry_count(&self) -> u32 { |
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350 match self { |
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351 NodeRef::InMemory(_path, node) => { |
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352 node.descendants_with_entry_count |
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353 } |
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354 NodeRef::OnDisk(node) => node.descendants_with_entry_count.get(), |
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355 } |
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356 } |
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357 |
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358 pub(super) fn tracked_descendants_count(&self) -> u32 { |
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359 match self { |
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360 NodeRef::InMemory(_path, node) => node.tracked_descendants_count, |
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361 NodeRef::OnDisk(node) => node.tracked_descendants_count.get(), |
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362 } |
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363 } |
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364 } |
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365 |
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366 /// Represents a file or a directory |
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367 #[derive(Default)] |
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368 pub(super) struct Node<'on_disk> { |
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369 pub(super) data: NodeData, |
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370 |
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371 pub(super) copy_source: Option<Cow<'on_disk, HgPath>>, |
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372 |
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373 pub(super) children: ChildNodes<'on_disk>, |
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374 |
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375 /// How many (non-inclusive) descendants of this node have an entry. |
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376 pub(super) descendants_with_entry_count: u32, |
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377 |
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378 /// How many (non-inclusive) descendants of this node have an entry whose |
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379 /// state is "tracked". |
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380 pub(super) tracked_descendants_count: u32, |
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381 } |
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382 |
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383 pub(super) enum NodeData { |
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384 Entry(DirstateEntry), |
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385 CachedDirectory { mtime: on_disk::Timestamp }, |
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386 None, |
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387 } |
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388 |
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389 impl Default for NodeData { |
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390 fn default() -> Self { |
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391 NodeData::None |
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392 } |
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393 } |
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394 |
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395 impl NodeData { |
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396 fn has_entry(&self) -> bool { |
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397 match self { |
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398 NodeData::Entry(_) => true, |
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399 _ => false, |
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400 } |
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401 } |
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402 |
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403 fn as_entry(&self) -> Option<&DirstateEntry> { |
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404 match self { |
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405 NodeData::Entry(entry) => Some(entry), |
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406 _ => None, |
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407 } |
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408 } |
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409 } |
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410 |
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411 impl<'on_disk> DirstateMap<'on_disk> { |
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412 pub(super) fn empty(on_disk: &'on_disk [u8]) -> Self { |
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413 Self { |
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414 on_disk, |
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415 root: ChildNodes::default(), |
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416 nodes_with_entry_count: 0, |
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417 nodes_with_copy_source_count: 0, |
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418 ignore_patterns_hash: [0; on_disk::IGNORE_PATTERNS_HASH_LEN], |
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419 unreachable_bytes: 0, |
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420 } |
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421 } |
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422 |
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423 #[timed] |
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424 pub fn new_v2( |
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425 on_disk: &'on_disk [u8], |
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426 data_size: usize, |
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427 metadata: &[u8], |
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428 ) -> Result<Self, DirstateError> { |
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429 if let Some(data) = on_disk.get(..data_size) { |
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430 Ok(on_disk::read(data, metadata)?) |
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431 } else { |
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432 Err(DirstateV2ParseError.into()) |
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433 } |
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434 } |
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435 |
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436 #[timed] |
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437 pub fn new_v1( |
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438 on_disk: &'on_disk [u8], |
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439 ) -> Result<(Self, Option<DirstateParents>), DirstateError> { |
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440 let mut map = Self::empty(on_disk); |
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441 if map.on_disk.is_empty() { |
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442 return Ok((map, None)); |
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443 } |
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444 |
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445 let parents = parse_dirstate_entries( |
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446 map.on_disk, |
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447 |path, entry, copy_source| { |
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448 let tracked = entry.state().is_tracked(); |
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449 let node = Self::get_or_insert_node( |
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450 map.on_disk, |
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451 &mut map.unreachable_bytes, |
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452 &mut map.root, |
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453 path, |
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454 WithBasename::to_cow_borrowed, |
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455 |ancestor| { |
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456 if tracked { |
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457 ancestor.tracked_descendants_count += 1 |
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458 } |
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459 ancestor.descendants_with_entry_count += 1 |
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460 }, |
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461 )?; |
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462 assert!( |
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463 !node.data.has_entry(), |
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464 "duplicate dirstate entry in read" |
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465 ); |
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466 assert!( |
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467 node.copy_source.is_none(), |
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468 "duplicate dirstate entry in read" |
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469 ); |
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470 node.data = NodeData::Entry(*entry); |
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471 node.copy_source = copy_source.map(Cow::Borrowed); |
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472 map.nodes_with_entry_count += 1; |
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473 if copy_source.is_some() { |
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474 map.nodes_with_copy_source_count += 1 |
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475 } |
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476 Ok(()) |
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477 }, |
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478 )?; |
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479 let parents = Some(parents.clone()); |
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480 |
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481 Ok((map, parents)) |
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482 } |
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483 |
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484 /// Assuming dirstate-v2 format, returns whether the next write should |
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485 /// append to the existing data file that contains `self.on_disk` (true), |
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486 /// or create a new data file from scratch (false). |
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487 pub(super) fn write_should_append(&self) -> bool { |
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488 let ratio = self.unreachable_bytes as f32 / self.on_disk.len() as f32; |
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489 ratio < ACCEPTABLE_UNREACHABLE_BYTES_RATIO |
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490 } |
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491 |
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492 fn get_node<'tree>( |
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493 &'tree self, |
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494 path: &HgPath, |
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495 ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> { |
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496 let mut children = self.root.as_ref(); |
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497 let mut components = path.components(); |
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498 let mut component = |
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499 components.next().expect("expected at least one components"); |
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500 loop { |
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501 if let Some(child) = children.get(component, self.on_disk)? { |
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502 if let Some(next_component) = components.next() { |
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503 component = next_component; |
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504 children = child.children(self.on_disk)?; |
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505 } else { |
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506 return Ok(Some(child)); |
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507 } |
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508 } else { |
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509 return Ok(None); |
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510 } |
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511 } |
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512 } |
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513 |
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514 /// Returns a mutable reference to the node at `path` if it exists |
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515 /// |
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516 /// This takes `root` instead of `&mut self` so that callers can mutate |
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517 /// other fields while the returned borrow is still valid |
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518 fn get_node_mut<'tree>( |
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519 on_disk: &'on_disk [u8], |
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520 unreachable_bytes: &mut u32, |
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521 root: &'tree mut ChildNodes<'on_disk>, |
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522 path: &HgPath, |
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523 ) -> Result<Option<&'tree mut Node<'on_disk>>, DirstateV2ParseError> { |
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524 let mut children = root; |
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525 let mut components = path.components(); |
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526 let mut component = |
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527 components.next().expect("expected at least one components"); |
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528 loop { |
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529 if let Some(child) = children |
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530 .make_mut(on_disk, unreachable_bytes)? |
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531 .get_mut(component) |
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532 { |
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533 if let Some(next_component) = components.next() { |
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534 component = next_component; |
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535 children = &mut child.children; |
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536 } else { |
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537 return Ok(Some(child)); |
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538 } |
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539 } else { |
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540 return Ok(None); |
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541 } |
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542 } |
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543 } |
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544 |
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545 pub(super) fn get_or_insert<'tree, 'path>( |
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546 &'tree mut self, |
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547 path: &HgPath, |
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548 ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> { |
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549 Self::get_or_insert_node( |
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550 self.on_disk, |
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551 &mut self.unreachable_bytes, |
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552 &mut self.root, |
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553 path, |
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554 WithBasename::to_cow_owned, |
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555 |_| {}, |
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556 ) |
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557 } |
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558 |
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559 fn get_or_insert_node<'tree, 'path>( |
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560 on_disk: &'on_disk [u8], |
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561 unreachable_bytes: &mut u32, |
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562 root: &'tree mut ChildNodes<'on_disk>, |
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563 path: &'path HgPath, |
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564 to_cow: impl Fn( |
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565 WithBasename<&'path HgPath>, |
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566 ) -> WithBasename<Cow<'on_disk, HgPath>>, |
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567 mut each_ancestor: impl FnMut(&mut Node), |
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568 ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> { |
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569 let mut child_nodes = root; |
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570 let mut inclusive_ancestor_paths = |
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571 WithBasename::inclusive_ancestors_of(path); |
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572 let mut ancestor_path = inclusive_ancestor_paths |
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573 .next() |
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574 .expect("expected at least one inclusive ancestor"); |
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575 loop { |
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576 // TODO: can we avoid allocating an owned key in cases where the |
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577 // map already contains that key, without introducing double |
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578 // lookup? |
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579 let child_node = child_nodes |
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580 .make_mut(on_disk, unreachable_bytes)? |
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581 .entry(to_cow(ancestor_path)) |
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582 .or_default(); |
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583 if let Some(next) = inclusive_ancestor_paths.next() { |
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584 each_ancestor(child_node); |
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585 ancestor_path = next; |
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586 child_nodes = &mut child_node.children; |
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587 } else { |
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588 return Ok(child_node); |
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589 } |
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590 } |
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591 } |
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592 |
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593 fn add_or_remove_file( |
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594 &mut self, |
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595 path: &HgPath, |
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596 old_state: Option<EntryState>, |
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597 new_entry: DirstateEntry, |
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598 ) -> Result<(), DirstateV2ParseError> { |
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599 let had_entry = old_state.is_some(); |
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600 let was_tracked = old_state.map_or(false, |s| s.is_tracked()); |
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601 let tracked_count_increment = |
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602 match (was_tracked, new_entry.state().is_tracked()) { |
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603 (false, true) => 1, |
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604 (true, false) => -1, |
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605 _ => 0, |
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606 }; |
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607 |
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608 let node = Self::get_or_insert_node( |
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609 self.on_disk, |
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610 &mut self.unreachable_bytes, |
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611 &mut self.root, |
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612 path, |
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613 WithBasename::to_cow_owned, |
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614 |ancestor| { |
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615 if !had_entry { |
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616 ancestor.descendants_with_entry_count += 1; |
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617 } |
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618 |
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619 // We can’t use `+= increment` because the counter is unsigned, |
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620 // and we want debug builds to detect accidental underflow |
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621 // through zero |
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622 match tracked_count_increment { |
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623 1 => ancestor.tracked_descendants_count += 1, |
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624 -1 => ancestor.tracked_descendants_count -= 1, |
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625 _ => {} |
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626 } |
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627 }, |
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628 )?; |
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629 if !had_entry { |
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630 self.nodes_with_entry_count += 1 |
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631 } |
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632 node.data = NodeData::Entry(new_entry); |
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633 Ok(()) |
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634 } |
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635 |
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636 fn iter_nodes<'tree>( |
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637 &'tree self, |
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638 ) -> impl Iterator< |
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639 Item = Result<NodeRef<'tree, 'on_disk>, DirstateV2ParseError>, |
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640 > + 'tree { |
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641 // Depth first tree traversal. |
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642 // |
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643 // If we could afford internal iteration and recursion, |
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644 // this would look like: |
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645 // |
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646 // ``` |
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647 // fn traverse_children( |
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648 // children: &ChildNodes, |
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649 // each: &mut impl FnMut(&Node), |
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650 // ) { |
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651 // for child in children.values() { |
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652 // traverse_children(&child.children, each); |
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653 // each(child); |
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654 // } |
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655 // } |
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656 // ``` |
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657 // |
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658 // However we want an external iterator and therefore can’t use the |
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659 // call stack. Use an explicit stack instead: |
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660 let mut stack = Vec::new(); |
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661 let mut iter = self.root.as_ref().iter(); |
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662 std::iter::from_fn(move || { |
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663 while let Some(child_node) = iter.next() { |
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664 let children = match child_node.children(self.on_disk) { |
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665 Ok(children) => children, |
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666 Err(error) => return Some(Err(error)), |
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667 }; |
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668 // Pseudo-recursion |
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669 let new_iter = children.iter(); |
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670 let old_iter = std::mem::replace(&mut iter, new_iter); |
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671 stack.push((child_node, old_iter)); |
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672 } |
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673 // Found the end of a `children.iter()` iterator. |
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674 if let Some((child_node, next_iter)) = stack.pop() { |
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675 // "Return" from pseudo-recursion by restoring state from the |
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676 // explicit stack |
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677 iter = next_iter; |
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678 |
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679 Some(Ok(child_node)) |
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680 } else { |
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681 // Reached the bottom of the stack, we’re done |
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682 None |
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683 } |
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684 }) |
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685 } |
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686 |
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687 fn clear_known_ambiguous_mtimes( |
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688 &mut self, |
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689 paths: &[impl AsRef<HgPath>], |
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690 ) -> Result<(), DirstateV2ParseError> { |
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691 for path in paths { |
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692 if let Some(node) = Self::get_node_mut( |
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693 self.on_disk, |
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694 &mut self.unreachable_bytes, |
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695 &mut self.root, |
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696 path.as_ref(), |
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697 )? { |
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698 if let NodeData::Entry(entry) = &mut node.data { |
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699 entry.clear_mtime(); |
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700 } |
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701 } |
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702 } |
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703 Ok(()) |
47100
caa3031c9ed5
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|
704 } |
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705 |
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706 /// Return a faillilble iterator of full paths of nodes that have an |
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707 /// `entry` for which the given `predicate` returns true. |
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708 /// |
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709 /// Fallibility means that each iterator item is a `Result`, which may |
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710 /// indicate a parse error of the on-disk dirstate-v2 format. Such errors |
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711 /// should only happen if Mercurial is buggy or a repository is corrupted. |
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|
712 fn filter_full_paths<'tree>( |
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|
713 &'tree self, |
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|
714 predicate: impl Fn(&DirstateEntry) -> bool + 'tree, |
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|
715 ) -> impl Iterator<Item = Result<&HgPath, DirstateV2ParseError>> + 'tree |
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716 { |
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|
717 filter_map_results(self.iter_nodes(), move |node| { |
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718 if let Some(entry) = node.entry()? { |
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719 if predicate(&entry) { |
47336
8d0260d0dbc9
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|
720 return Ok(Some(node.full_path(self.on_disk)?)); |
47335
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|
721 } |
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722 } |
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|
723 Ok(None) |
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724 }) |
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|
725 } |
47681
d94118365ec5
dirstate-v2: Add heuristic for when to create a new data file
Simon Sapin <simon.sapin@octobus.net>
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|
726 |
d94118365ec5
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|
727 fn count_dropped_path(unreachable_bytes: &mut u32, path: &Cow<HgPath>) { |
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dirstate-v2: Add heuristic for when to create a new data file
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|
728 if let Cow::Borrowed(path) = path { |
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|
729 *unreachable_bytes += path.len() as u32 |
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|
730 } |
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|
731 } |
47335
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|
732 } |
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|
733 |
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|
734 /// Like `Iterator::filter_map`, but over a fallible iterator of `Result`s. |
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735 /// |
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736 /// The callback is only called for incoming `Ok` values. Errors are passed |
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737 /// through as-is. In order to let it use the `?` operator the callback is |
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|
738 /// expected to return a `Result` of `Option`, instead of an `Option` of |
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|
739 /// `Result`. |
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|
740 fn filter_map_results<'a, I, F, A, B, E>( |
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|
741 iter: I, |
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|
742 f: F, |
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|
743 ) -> impl Iterator<Item = Result<B, E>> + 'a |
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|
744 where |
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|
745 I: Iterator<Item = Result<A, E>> + 'a, |
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746 F: Fn(A) -> Result<Option<B>, E> + 'a, |
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|
747 { |
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|
748 iter.filter_map(move |result| match result { |
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|
749 Ok(node) => f(node).transpose(), |
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|
750 Err(e) => Some(Err(e)), |
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|
751 }) |
47095
473abf4728bf
dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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|
752 } |
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|
753 |
47123
d8ac62374943
dirstate-tree: Make `DirstateMap` borrow from a bytes buffer
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parents:
47121
diff
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|
754 impl<'on_disk> super::dispatch::DirstateMapMethods for DirstateMap<'on_disk> { |
47095
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755 fn clear(&mut self) { |
47333
69530e5d4fe5
dirstate-tree: Add `NodeRef` and `ChildNodesRef` enums
Simon Sapin <simon.sapin@octobus.net>
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47332
diff
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|
756 self.root = Default::default(); |
47103
214ae40e136b
dirstate-tree: Maintain a counter of DirstateEntry’s and copy sources
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|
757 self.nodes_with_entry_count = 0; |
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47102
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|
758 self.nodes_with_copy_source_count = 0; |
47095
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|
759 } |
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|
760 |
48045
32ef647821b2
dirstate: Skip no-op conversion in Rust DirstateMap::set_v1
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761 fn set_entry(&mut self, filename: &HgPath, entry: DirstateEntry) { |
47692
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|
762 let node = |
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|
763 self.get_or_insert(&filename).expect("no parse error in v1"); |
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764 node.data = NodeData::Entry(entry); |
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|
765 } |
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|
766 |
47095
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767 fn add_file( |
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768 &mut self, |
47107
7dfc598ddcfe
dirstate-tree: Add add_file, remove_file, and drop_file
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769 filename: &HgPath, |
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|
770 entry: DirstateEntry, |
47525
fe4641cf9b72
dirstate: use a `added` parameter to _addpath
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diff
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|
771 added: bool, |
47527
c6b91a9c242a
dirstate: use a `merged` parameter to _addpath
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|
772 merged: bool, |
47521
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773 from_p2: bool, |
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774 possibly_dirty: bool, |
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|
775 ) -> Result<(), DirstateError> { |
48022
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776 let state; |
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777 let size; |
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778 let mtime; |
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779 if added { |
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780 assert!(!possibly_dirty); |
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781 assert!(!from_p2); |
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782 state = EntryState::Added; |
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783 size = SIZE_NON_NORMAL; |
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784 mtime = MTIME_UNSET; |
47527
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785 } else if merged { |
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786 assert!(!possibly_dirty); |
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787 assert!(!from_p2); |
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788 state = EntryState::Merged; |
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789 size = SIZE_FROM_OTHER_PARENT; |
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790 mtime = MTIME_UNSET; |
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791 } else if from_p2 { |
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792 assert!(!possibly_dirty); |
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793 state = EntryState::Normal; |
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794 size = SIZE_FROM_OTHER_PARENT; |
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795 mtime = MTIME_UNSET; |
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796 } else if possibly_dirty { |
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797 state = EntryState::Normal; |
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798 size = SIZE_NON_NORMAL; |
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799 mtime = MTIME_UNSET; |
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800 } else { |
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801 state = EntryState::Normal; |
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802 size = entry.size() & V1_RANGEMASK; |
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|
803 mtime = entry.mtime() & V1_RANGEMASK; |
47521
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804 } |
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805 let mode = entry.mode(); |
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806 let entry = DirstateEntry::from_v1_data(state, mode, size, mtime); |
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807 |
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808 let old_state = self.get(filename)?.map(|e| e.state()); |
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809 |
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810 Ok(self.add_or_remove_file(filename, old_state, entry)?) |
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811 } |
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812 |
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813 fn remove_file( |
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814 &mut self, |
47107
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815 filename: &HgPath, |
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816 in_merge: bool, |
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817 ) -> Result<(), DirstateError> { |
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818 let old_entry_opt = self.get(filename)?; |
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819 let old_state = old_entry_opt.map(|e| e.state()); |
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820 let mut size = 0; |
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821 if in_merge { |
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822 // XXX we should not be able to have 'm' state and 'FROM_P2' if not |
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823 // during a merge. So I (marmoute) am not sure we need the |
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824 // conditionnal at all. Adding double checking this with assert |
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825 // would be nice. |
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826 if let Some(old_entry) = old_entry_opt { |
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827 // backup the previous state |
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828 if old_entry.state() == EntryState::Merged { |
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829 size = SIZE_NON_NORMAL; |
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830 } else if old_entry.state() == EntryState::Normal |
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831 && old_entry.size() == SIZE_FROM_OTHER_PARENT |
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832 { |
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833 // other parent |
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834 size = SIZE_FROM_OTHER_PARENT; |
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835 } |
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836 } |
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837 } |
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838 if size == 0 { |
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839 self.copy_map_remove(filename)?; |
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840 } |
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841 let entry = DirstateEntry::new_removed(size); |
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842 Ok(self.add_or_remove_file(filename, old_state, entry)?) |
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843 } |
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|
844 |
47535
6025353c9c55
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845 fn drop_file(&mut self, filename: &HgPath) -> Result<bool, DirstateError> { |
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|
846 let was_tracked = self |
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|
847 .get(filename)? |
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|
848 .map_or(false, |e| e.state().is_tracked()); |
47192
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|
849 struct Dropped { |
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850 was_tracked: bool, |
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851 had_entry: bool, |
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852 had_copy_source: bool, |
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|
853 } |
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854 |
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855 /// If this returns `Ok(Some((dropped, removed)))`, then |
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856 /// |
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857 /// * `dropped` is about the leaf node that was at `filename` |
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858 /// * `removed` is whether this particular level of recursion just |
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|
859 /// removed a node in `nodes`. |
47336
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|
860 fn recur<'on_disk>( |
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|
861 on_disk: &'on_disk [u8], |
47681
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|
862 unreachable_bytes: &mut u32, |
47336
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|
863 nodes: &mut ChildNodes<'on_disk>, |
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|
864 path: &HgPath, |
47352
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|
865 ) -> Result<Option<(Dropped, bool)>, DirstateV2ParseError> { |
47192
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|
866 let (first_path_component, rest_of_path) = |
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|
867 path.split_first_component(); |
47681
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|
868 let nodes = nodes.make_mut(on_disk, unreachable_bytes)?; |
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|
869 let node = if let Some(node) = nodes.get_mut(first_path_component) |
47335
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870 { |
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|
871 node |
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|
872 } else { |
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873 return Ok(None); |
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|
874 }; |
47192
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|
875 let dropped; |
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|
876 if let Some(rest) = rest_of_path { |
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|
877 if let Some((d, removed)) = recur( |
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|
878 on_disk, |
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879 unreachable_bytes, |
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880 &mut node.children, |
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|
881 rest, |
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|
882 )? { |
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|
883 dropped = d; |
47478
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|
884 if dropped.had_entry { |
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885 node.descendants_with_entry_count -= 1; |
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|
886 } |
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|
887 if dropped.was_tracked { |
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888 node.tracked_descendants_count -= 1; |
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|
889 } |
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|
890 |
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|
891 // Directory caches must be invalidated when removing a |
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|
892 // child node |
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|
893 if removed { |
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894 if let NodeData::CachedDirectory { .. } = &node.data { |
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|
895 node.data = NodeData::None |
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896 } |
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|
897 } |
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|
898 } else { |
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|
899 return Ok(None); |
47120
7109a38830c9
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47119
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|
900 } |
47192
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|
901 } else { |
47348
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dirstate-v2: Allow tree nodes without an entry to store a timestamp
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|
902 let had_entry = node.data.has_entry(); |
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|
903 if had_entry { |
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|
904 node.data = NodeData::None |
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|
905 } |
47681
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diff
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|
906 if let Some(source) = &node.copy_source { |
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|
907 DirstateMap::count_dropped_path(unreachable_bytes, source) |
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diff
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|
908 } |
47192
1249eb9cc332
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diff
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|
909 dropped = Dropped { |
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|
910 was_tracked: node |
47348
a4de570e61fa
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|
911 .data |
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|
912 .as_entry() |
48022
f2a9db29cb2d
rust: Make the fields of DirstateEntry private
Simon Sapin <simon.sapin@octobus.net>
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47692
diff
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|
913 .map_or(false, |entry| entry.state().is_tracked()), |
47348
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diff
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|
914 had_entry, |
47192
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|
915 had_copy_source: node.copy_source.take().is_some(), |
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|
916 }; |
47193
47ccab19bf9f
dirstate-tree: Remove newly-empty nodes after removing a `DirstateEntry`
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diff
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|
917 } |
47ccab19bf9f
dirstate-tree: Remove newly-empty nodes after removing a `DirstateEntry`
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diff
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|
918 // After recursion, for both leaf (rest_of_path is None) nodes and |
47ccab19bf9f
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|
919 // parent nodes, remove a node if it just became empty. |
47352
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diff
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|
920 let remove = !node.data.has_entry() |
47193
47ccab19bf9f
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|
921 && node.copy_source.is_none() |
47352
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|
922 && node.children.is_empty(); |
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|
923 if remove { |
47681
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|
924 let (key, _) = |
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925 nodes.remove_entry(first_path_component).unwrap(); |
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|
926 DirstateMap::count_dropped_path( |
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|
927 unreachable_bytes, |
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|
928 key.full_path(), |
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|
929 ) |
47192
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|
930 } |
47352
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changeset
|
931 Ok(Some((dropped, remove))) |
47192
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|
932 } |
47107
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|
933 |
47681
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|
934 if let Some((dropped, _removed)) = recur( |
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|
935 self.on_disk, |
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|
936 &mut self.unreachable_bytes, |
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|
937 &mut self.root, |
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|
938 filename, |
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|
939 )? { |
47192
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|
940 if dropped.had_entry { |
47107
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|
941 self.nodes_with_entry_count -= 1 |
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|
942 } |
47192
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|
943 if dropped.had_copy_source { |
47107
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|
944 self.nodes_with_copy_source_count -= 1 |
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|
945 } |
47192
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|
946 Ok(dropped.had_entry) |
47107
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|
947 } else { |
48026
1b2ee68e85f9
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Simon Sapin <simon.sapin@octobus.net>
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|
948 debug_assert!(!was_tracked); |
47107
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|
949 Ok(false) |
7dfc598ddcfe
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|
950 } |
47095
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|
951 } |
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|
952 |
47335
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|
953 fn clear_ambiguous_times( |
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|
954 &mut self, |
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|
955 filenames: Vec<HgPathBuf>, |
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|
956 now: i32, |
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diff
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|
957 ) -> Result<(), DirstateV2ParseError> { |
47105
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diff
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|
958 for filename in filenames { |
47681
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|
959 if let Some(node) = Self::get_node_mut( |
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|
960 self.on_disk, |
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|
961 &mut self.unreachable_bytes, |
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|
962 &mut self.root, |
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|
963 &filename, |
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|
964 )? { |
47348
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|
965 if let NodeData::Entry(entry) = &mut node.data { |
47330
73f23e7610f8
dirstate-tree: Remove DirstateMap::iter_node_data_mut
Simon Sapin <simon.sapin@octobus.net>
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47283
diff
changeset
|
966 entry.clear_ambiguous_mtime(now); |
47105
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|
967 } |
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|
968 } |
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|
969 } |
47335
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|
970 Ok(()) |
47095
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|
971 } |
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|
972 |
47335
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|
973 fn non_normal_entries_contains( |
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|
974 &mut self, |
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|
975 key: &HgPath, |
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|
976 ) -> Result<bool, DirstateV2ParseError> { |
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|
977 Ok(if let Some(node) = self.get_node(key)? { |
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|
978 node.entry()?.map_or(false, |entry| entry.is_non_normal()) |
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|
979 } else { |
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|
980 false |
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|
981 }) |
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|
982 } |
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|
983 |
47692
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|
984 fn non_normal_entries_remove(&mut self, key: &HgPath) -> bool { |
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|
985 // Do nothing, this `DirstateMap` does not have a separate "non normal |
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|
986 // entries" set that need to be kept up to date. |
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|
987 if let Ok(Some(v)) = self.get(key) { |
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|
988 return v.is_non_normal(); |
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|
989 } |
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|
990 false |
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|
991 } |
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|
992 |
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|
993 fn non_normal_entries_add(&mut self, _key: &HgPath) { |
47108
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994 // Do nothing, this `DirstateMap` does not have a separate "non normal |
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995 // entries" set that need to be kept up to date |
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996 } |
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997 |
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|
998 fn non_normal_or_other_parent_paths( |
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|
999 &mut self, |
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|
1000 ) -> Box<dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> + '_> |
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1001 { |
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|
1002 Box::new(self.filter_full_paths(|entry| { |
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|
1003 entry.is_non_normal() || entry.is_from_other_parent() |
47108
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|
1004 })) |
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1005 } |
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|
1006 |
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1007 fn set_non_normal_other_parent_entries(&mut self, _force: bool) { |
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1008 // Do nothing, this `DirstateMap` does not have a separate "non normal |
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1009 // entries" and "from other parent" sets that need to be recomputed |
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1010 } |
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1011 |
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1012 fn iter_non_normal_paths( |
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1013 &mut self, |
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1014 ) -> Box< |
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1015 dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> + Send + '_, |
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1016 > { |
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1017 self.iter_non_normal_paths_panic() |
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1018 } |
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1019 |
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1020 fn iter_non_normal_paths_panic( |
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1021 &self, |
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1022 ) -> Box< |
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1023 dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> + Send + '_, |
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1024 > { |
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1025 Box::new(self.filter_full_paths(|entry| entry.is_non_normal())) |
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1026 } |
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1027 |
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1028 fn iter_other_parent_paths( |
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1029 &mut self, |
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1030 ) -> Box< |
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1031 dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> + Send + '_, |
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1032 > { |
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1033 Box::new(self.filter_full_paths(|entry| entry.is_from_other_parent())) |
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1034 } |
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1035 |
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1036 fn has_tracked_dir( |
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1037 &mut self, |
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1038 directory: &HgPath, |
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1039 ) -> Result<bool, DirstateError> { |
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1040 if let Some(node) = self.get_node(directory)? { |
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1041 // A node without a `DirstateEntry` was created to hold child |
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1042 // nodes, and is therefore a directory. |
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|
1043 let state = node.state()?; |
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1044 Ok(state.is_none() && node.tracked_descendants_count() > 0) |
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1045 } else { |
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1046 Ok(false) |
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1047 } |
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1048 } |
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1049 |
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1050 fn has_dir(&mut self, directory: &HgPath) -> Result<bool, DirstateError> { |
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1051 if let Some(node) = self.get_node(directory)? { |
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1052 // A node without a `DirstateEntry` was created to hold child |
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1053 // nodes, and is therefore a directory. |
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1054 let state = node.state()?; |
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1055 Ok(state.is_none() && node.descendants_with_entry_count() > 0) |
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1056 } else { |
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1057 Ok(false) |
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1058 } |
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1059 } |
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1060 |
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1061 #[timed] |
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1062 fn pack_v1( |
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1063 &mut self, |
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1064 parents: DirstateParents, |
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1065 now: Timestamp, |
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|
1066 ) -> Result<Vec<u8>, DirstateError> { |
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|
1067 let now: i32 = now.0.try_into().expect("time overflow"); |
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|
1068 let mut ambiguous_mtimes = Vec::new(); |
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1069 // Optizimation (to be measured?): pre-compute size to avoid `Vec` |
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1070 // reallocations |
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|
1071 let mut size = parents.as_bytes().len(); |
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|
1072 for node in self.iter_nodes() { |
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1073 let node = node?; |
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1074 if let Some(entry) = node.entry()? { |
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1075 size += packed_entry_size( |
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1076 node.full_path(self.on_disk)?, |
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1077 node.copy_source(self.on_disk)?, |
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|
1078 ); |
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|
1079 if entry.mtime_is_ambiguous(now) { |
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1080 ambiguous_mtimes.push( |
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1081 node.full_path_borrowed(self.on_disk)? |
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1082 .detach_from_tree(), |
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1083 ) |
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1084 } |
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1085 } |
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1086 } |
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1087 self.clear_known_ambiguous_mtimes(&ambiguous_mtimes)?; |
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1088 |
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1089 let mut packed = Vec::with_capacity(size); |
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1090 packed.extend(parents.as_bytes()); |
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1091 |
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1092 for node in self.iter_nodes() { |
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|
1093 let node = node?; |
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1094 if let Some(entry) = node.entry()? { |
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|
1095 pack_entry( |
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1096 node.full_path(self.on_disk)?, |
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1097 &entry, |
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1098 node.copy_source(self.on_disk)?, |
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1099 &mut packed, |
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1100 ); |
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1101 } |
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1102 } |
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1103 Ok(packed) |
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1104 } |
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1105 |
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1106 /// Returns new data and metadata together with whether that data should be |
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1107 /// appended to the existing data file whose content is at |
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1108 /// `self.on_disk` (true), instead of written to a new data file |
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1109 /// (false). |
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1110 #[timed] |
47678
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1111 fn pack_v2( |
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1112 &mut self, |
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|
1113 now: Timestamp, |
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|
1114 can_append: bool, |
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1115 ) -> Result<(Vec<u8>, Vec<u8>, bool), DirstateError> { |
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|
1116 // TODO: how do we want to handle this in 2038? |
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1117 let now: i32 = now.0.try_into().expect("time overflow"); |
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1118 let mut paths = Vec::new(); |
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1119 for node in self.iter_nodes() { |
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1120 let node = node?; |
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1121 if let Some(entry) = node.entry()? { |
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1122 if entry.mtime_is_ambiguous(now) { |
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1123 paths.push( |
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1124 node.full_path_borrowed(self.on_disk)? |
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1125 .detach_from_tree(), |
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1126 ) |
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1127 } |
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1128 } |
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1129 } |
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1130 // Borrow of `self` ends here since we collect cloned paths |
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1131 |
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1132 self.clear_known_ambiguous_mtimes(&paths)?; |
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1133 |
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1134 on_disk::write(self, can_append) |
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1135 } |
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1136 |
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1137 fn status<'a>( |
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1138 &'a mut self, |
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1139 matcher: &'a (dyn Matcher + Sync), |
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1140 root_dir: PathBuf, |
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1141 ignore_files: Vec<PathBuf>, |
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1142 options: StatusOptions, |
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1143 ) -> Result<(DirstateStatus<'a>, Vec<PatternFileWarning>), StatusError> |
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1144 { |
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1145 super::status::status(self, matcher, root_dir, ignore_files, options) |
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1146 } |
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1147 |
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1148 fn copy_map_len(&self) -> usize { |
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1149 self.nodes_with_copy_source_count as usize |
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1150 } |
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1151 |
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1152 fn copy_map_iter(&self) -> CopyMapIter<'_> { |
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1153 Box::new(filter_map_results(self.iter_nodes(), move |node| { |
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1154 Ok(if let Some(source) = node.copy_source(self.on_disk)? { |
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1155 Some((node.full_path(self.on_disk)?, source)) |
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1156 } else { |
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1157 None |
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1158 }) |
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1159 })) |
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1160 } |
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1161 |
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1162 fn copy_map_contains_key( |
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1163 &self, |
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1164 key: &HgPath, |
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1165 ) -> Result<bool, DirstateV2ParseError> { |
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1166 Ok(if let Some(node) = self.get_node(key)? { |
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1167 node.has_copy_source() |
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1168 } else { |
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1169 false |
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1170 }) |
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1171 } |
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1172 |
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1173 fn copy_map_get( |
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1174 &self, |
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1175 key: &HgPath, |
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1176 ) -> Result<Option<&HgPath>, DirstateV2ParseError> { |
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1177 if let Some(node) = self.get_node(key)? { |
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1178 if let Some(source) = node.copy_source(self.on_disk)? { |
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1179 return Ok(Some(source)); |
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1180 } |
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1181 } |
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1182 Ok(None) |
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1183 } |
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1184 |
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1185 fn copy_map_remove( |
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1186 &mut self, |
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1187 key: &HgPath, |
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1188 ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
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1189 let count = &mut self.nodes_with_copy_source_count; |
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1190 let unreachable_bytes = &mut self.unreachable_bytes; |
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1191 Ok(Self::get_node_mut( |
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1192 self.on_disk, |
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1193 unreachable_bytes, |
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1194 &mut self.root, |
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1195 key, |
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1196 )? |
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1197 .and_then(|node| { |
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1198 if let Some(source) = &node.copy_source { |
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1199 *count -= 1; |
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1200 Self::count_dropped_path(unreachable_bytes, source); |
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1201 } |
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1202 node.copy_source.take().map(Cow::into_owned) |
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1203 })) |
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1204 } |
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1205 |
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1206 fn copy_map_insert( |
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1207 &mut self, |
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1208 key: HgPathBuf, |
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1209 value: HgPathBuf, |
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1210 ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
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1211 let node = Self::get_or_insert_node( |
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1212 self.on_disk, |
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1213 &mut self.unreachable_bytes, |
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1214 &mut self.root, |
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1215 &key, |
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1216 WithBasename::to_cow_owned, |
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1217 |_ancestor| {}, |
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1218 )?; |
47104
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1219 if node.copy_source.is_none() { |
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1220 self.nodes_with_copy_source_count += 1 |
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1221 } |
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1222 Ok(node.copy_source.replace(value.into()).map(Cow::into_owned)) |
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1223 } |
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1224 |
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1225 fn len(&self) -> usize { |
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1226 self.nodes_with_entry_count as usize |
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1227 } |
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1228 |
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1229 fn contains_key( |
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1230 &self, |
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1231 key: &HgPath, |
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1232 ) -> Result<bool, DirstateV2ParseError> { |
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1233 Ok(self.get(key)?.is_some()) |
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1234 } |
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1235 |
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1236 fn get( |
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1237 &self, |
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1238 key: &HgPath, |
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1239 ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
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1240 Ok(if let Some(node) = self.get_node(key)? { |
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1241 node.entry()? |
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1242 } else { |
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1243 None |
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1244 }) |
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1245 } |
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1246 |
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1247 fn iter(&self) -> StateMapIter<'_> { |
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1248 Box::new(filter_map_results(self.iter_nodes(), move |node| { |
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1249 Ok(if let Some(entry) = node.entry()? { |
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1250 Some((node.full_path(self.on_disk)?, entry)) |
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1251 } else { |
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1252 None |
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1253 }) |
47100
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1254 })) |
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1255 } |
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1256 |
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1257 fn iter_tracked_dirs( |
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1258 &mut self, |
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1259 ) -> Result< |
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1260 Box< |
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1261 dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> |
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|
1262 + Send |
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1263 + '_, |
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1264 >, |
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1265 DirstateError, |
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1266 > { |
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1267 let on_disk = self.on_disk; |
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1268 Ok(Box::new(filter_map_results( |
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1269 self.iter_nodes(), |
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1270 move |node| { |
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1271 Ok(if node.tracked_descendants_count() > 0 { |
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|
1272 Some(node.full_path(on_disk)?) |
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1273 } else { |
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1274 None |
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1275 }) |
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1276 }, |
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|
1277 ))) |
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1278 } |
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1279 |
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|
1280 fn debug_iter( |
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|
1281 &self, |
48023
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|
1282 all: bool, |
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1283 ) -> Box< |
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1284 dyn Iterator< |
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1285 Item = Result< |
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1286 (&HgPath, (u8, i32, i32, i32)), |
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1287 DirstateV2ParseError, |
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1288 >, |
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1289 > + Send |
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1290 + '_, |
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1291 > { |
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|
1292 Box::new(filter_map_results(self.iter_nodes(), move |node| { |
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|
1293 let debug_tuple = if let Some(entry) = node.entry()? { |
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|
1294 entry.debug_tuple() |
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1295 } else if !all { |
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1296 return Ok(None); |
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1297 } else if let Some(mtime) = node.cached_directory_mtime() { |
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1298 (b' ', 0, -1, mtime.seconds() as i32) |
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1299 } else { |
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1300 (b' ', 0, -1, -1) |
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1301 }; |
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1302 Ok(Some((node.full_path(self.on_disk)?, debug_tuple))) |
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1303 })) |
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1304 } |
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1305 } |