Mercurial > hg
annotate rust/hg-core/src/dirstate_tree/dirstate_map.rs @ 49120:3df46f3a3d6c
rust-dirstatemap: implement part of the `setparents` logic
The Python code does many round-trip calls to the Rust dirstatemap when copy
information needs to be dropped in `setparents`.
This may result in improved performance on `commit`, `update` and other such
commands, but was mostly done to drop the last use of `set_dirstate_item`.
See inline comments for an asterisk about performance, and see next patch for
why `set_dirstate_item` has to go.
Differential Revision: https://phab.mercurial-scm.org/D12518
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Tue, 29 Mar 2022 00:53:11 +0200 |
parents | a55934393078 |
children | 10edc54d18f1 |
rev | line source |
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1 use bytes_cast::BytesCast; |
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2 use micro_timer::timed; |
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3 use std::borrow::Cow; |
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4 use std::path::PathBuf; |
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5 |
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6 use super::on_disk; |
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7 use super::on_disk::DirstateV2ParseError; |
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8 use super::owning::OwningDirstateMap; |
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9 use super::path_with_basename::WithBasename; |
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10 use crate::dirstate::parsers::pack_entry; |
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11 use crate::dirstate::parsers::packed_entry_size; |
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12 use crate::dirstate::parsers::parse_dirstate_entries; |
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13 use crate::dirstate::CopyMapIter; |
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14 use crate::dirstate::DirstateV2Data; |
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15 use crate::dirstate::ParentFileData; |
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16 use crate::dirstate::StateMapIter; |
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17 use crate::dirstate::TruncatedTimestamp; |
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18 use crate::matchers::Matcher; |
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19 use crate::utils::hg_path::{HgPath, HgPathBuf}; |
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20 use crate::DirstateEntry; |
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21 use crate::DirstateError; |
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22 use crate::DirstateMapError; |
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23 use crate::DirstateParents; |
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24 use crate::DirstateStatus; |
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25 use crate::EntryState; |
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26 use crate::FastHashbrownMap as FastHashMap; |
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27 use crate::PatternFileWarning; |
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28 use crate::StatusError; |
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29 use crate::StatusOptions; |
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30 |
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31 /// Append to an existing data file if the amount of unreachable data (not used |
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32 /// anymore) is less than this fraction of the total amount of existing data. |
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33 const ACCEPTABLE_UNREACHABLE_BYTES_RATIO: f32 = 0.5; |
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34 |
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35 pub struct DirstateMap<'on_disk> { |
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36 /// Contents of the `.hg/dirstate` file |
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37 pub(super) on_disk: &'on_disk [u8], |
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38 |
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39 pub(super) root: ChildNodes<'on_disk>, |
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40 |
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41 /// Number of nodes anywhere in the tree that have `.entry.is_some()`. |
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42 pub(super) nodes_with_entry_count: u32, |
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43 |
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44 /// Number of nodes anywhere in the tree that have |
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45 /// `.copy_source.is_some()`. |
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46 pub(super) nodes_with_copy_source_count: u32, |
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47 |
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48 /// See on_disk::Header |
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49 pub(super) ignore_patterns_hash: on_disk::IgnorePatternsHash, |
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50 |
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51 /// How many bytes of `on_disk` are not used anymore |
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52 pub(super) unreachable_bytes: u32, |
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53 } |
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54 |
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55 /// Using a plain `HgPathBuf` of the full path from the repository root as a |
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56 /// map key would also work: all paths in a given map have the same parent |
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57 /// path, so comparing full paths gives the same result as comparing base |
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58 /// names. However `HashMap` would waste time always re-hashing the same |
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59 /// string prefix. |
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60 pub(super) type NodeKey<'on_disk> = WithBasename<Cow<'on_disk, HgPath>>; |
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61 |
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62 /// Similar to `&'tree Cow<'on_disk, HgPath>`, but can also be returned |
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63 /// for on-disk nodes that don’t actually have a `Cow` to borrow. |
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64 pub(super) enum BorrowedPath<'tree, 'on_disk> { |
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65 InMemory(&'tree HgPathBuf), |
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66 OnDisk(&'on_disk HgPath), |
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67 } |
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68 |
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69 pub(super) enum ChildNodes<'on_disk> { |
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70 InMemory(FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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71 OnDisk(&'on_disk [on_disk::Node]), |
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72 } |
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73 |
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74 pub(super) enum ChildNodesRef<'tree, 'on_disk> { |
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75 InMemory(&'tree FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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76 OnDisk(&'on_disk [on_disk::Node]), |
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77 } |
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78 |
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79 pub(super) enum NodeRef<'tree, 'on_disk> { |
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80 InMemory(&'tree NodeKey<'on_disk>, &'tree Node<'on_disk>), |
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81 OnDisk(&'on_disk on_disk::Node), |
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82 } |
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83 |
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84 impl<'tree, 'on_disk> BorrowedPath<'tree, 'on_disk> { |
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85 pub fn detach_from_tree(&self) -> Cow<'on_disk, HgPath> { |
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86 match *self { |
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87 BorrowedPath::InMemory(in_memory) => Cow::Owned(in_memory.clone()), |
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88 BorrowedPath::OnDisk(on_disk) => Cow::Borrowed(on_disk), |
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89 } |
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90 } |
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91 } |
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92 |
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93 impl<'tree, 'on_disk> std::ops::Deref for BorrowedPath<'tree, 'on_disk> { |
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94 type Target = HgPath; |
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95 |
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96 fn deref(&self) -> &HgPath { |
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97 match *self { |
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98 BorrowedPath::InMemory(in_memory) => in_memory, |
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99 BorrowedPath::OnDisk(on_disk) => on_disk, |
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100 } |
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101 } |
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102 } |
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103 |
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104 impl Default for ChildNodes<'_> { |
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105 fn default() -> Self { |
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106 ChildNodes::InMemory(Default::default()) |
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107 } |
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108 } |
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109 |
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110 impl<'on_disk> ChildNodes<'on_disk> { |
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111 pub(super) fn as_ref<'tree>( |
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112 &'tree self, |
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113 ) -> ChildNodesRef<'tree, 'on_disk> { |
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114 match self { |
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115 ChildNodes::InMemory(nodes) => ChildNodesRef::InMemory(nodes), |
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116 ChildNodes::OnDisk(nodes) => ChildNodesRef::OnDisk(nodes), |
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117 } |
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118 } |
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119 |
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120 pub(super) fn is_empty(&self) -> bool { |
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121 match self { |
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122 ChildNodes::InMemory(nodes) => nodes.is_empty(), |
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123 ChildNodes::OnDisk(nodes) => nodes.is_empty(), |
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124 } |
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125 } |
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126 |
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127 fn make_mut( |
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128 &mut self, |
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129 on_disk: &'on_disk [u8], |
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130 unreachable_bytes: &mut u32, |
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131 ) -> Result< |
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132 &mut FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>, |
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133 DirstateV2ParseError, |
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134 > { |
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135 match self { |
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136 ChildNodes::InMemory(nodes) => Ok(nodes), |
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137 ChildNodes::OnDisk(nodes) => { |
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138 *unreachable_bytes += |
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139 std::mem::size_of_val::<[on_disk::Node]>(nodes) as u32; |
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140 let nodes = nodes |
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141 .iter() |
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142 .map(|node| { |
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143 Ok(( |
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144 node.path(on_disk)?, |
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145 node.to_in_memory_node(on_disk)?, |
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146 )) |
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147 }) |
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148 .collect::<Result<_, _>>()?; |
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149 *self = ChildNodes::InMemory(nodes); |
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150 match self { |
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151 ChildNodes::InMemory(nodes) => Ok(nodes), |
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152 ChildNodes::OnDisk(_) => unreachable!(), |
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153 } |
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154 } |
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155 } |
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156 } |
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157 } |
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158 |
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159 impl<'tree, 'on_disk> ChildNodesRef<'tree, 'on_disk> { |
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160 pub(super) fn get( |
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161 &self, |
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162 base_name: &HgPath, |
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163 on_disk: &'on_disk [u8], |
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164 ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> { |
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165 match self { |
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166 ChildNodesRef::InMemory(nodes) => Ok(nodes |
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167 .get_key_value(base_name) |
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168 .map(|(k, v)| NodeRef::InMemory(k, v))), |
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169 ChildNodesRef::OnDisk(nodes) => { |
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170 let mut parse_result = Ok(()); |
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171 let search_result = nodes.binary_search_by(|node| { |
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172 match node.base_name(on_disk) { |
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173 Ok(node_base_name) => node_base_name.cmp(base_name), |
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174 Err(e) => { |
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175 parse_result = Err(e); |
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176 // Dummy comparison result, `search_result` won’t |
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177 // be used since `parse_result` is an error |
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178 std::cmp::Ordering::Equal |
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179 } |
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180 } |
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181 }); |
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182 parse_result.map(|()| { |
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183 search_result.ok().map(|i| NodeRef::OnDisk(&nodes[i])) |
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184 }) |
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185 } |
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186 } |
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187 } |
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188 |
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189 /// Iterate in undefined order |
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190 pub(super) fn iter( |
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191 &self, |
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192 ) -> impl Iterator<Item = NodeRef<'tree, 'on_disk>> { |
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193 match self { |
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194 ChildNodesRef::InMemory(nodes) => itertools::Either::Left( |
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195 nodes.iter().map(|(k, v)| NodeRef::InMemory(k, v)), |
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196 ), |
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197 ChildNodesRef::OnDisk(nodes) => { |
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198 itertools::Either::Right(nodes.iter().map(NodeRef::OnDisk)) |
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199 } |
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200 } |
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201 } |
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202 |
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203 /// Iterate in parallel in undefined order |
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204 pub(super) fn par_iter( |
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205 &self, |
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206 ) -> impl rayon::iter::ParallelIterator<Item = NodeRef<'tree, 'on_disk>> |
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207 { |
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208 use rayon::prelude::*; |
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209 match self { |
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210 ChildNodesRef::InMemory(nodes) => rayon::iter::Either::Left( |
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211 nodes.par_iter().map(|(k, v)| NodeRef::InMemory(k, v)), |
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212 ), |
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213 ChildNodesRef::OnDisk(nodes) => rayon::iter::Either::Right( |
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214 nodes.par_iter().map(NodeRef::OnDisk), |
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215 ), |
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216 } |
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217 } |
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218 |
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219 pub(super) fn sorted(&self) -> Vec<NodeRef<'tree, 'on_disk>> { |
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220 match self { |
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221 ChildNodesRef::InMemory(nodes) => { |
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222 let mut vec: Vec<_> = nodes |
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223 .iter() |
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224 .map(|(k, v)| NodeRef::InMemory(k, v)) |
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225 .collect(); |
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226 fn sort_key<'a>(node: &'a NodeRef) -> &'a HgPath { |
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227 match node { |
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228 NodeRef::InMemory(path, _node) => path.base_name(), |
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229 NodeRef::OnDisk(_) => unreachable!(), |
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230 } |
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231 } |
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232 // `sort_unstable_by_key` doesn’t allow keys borrowing from the |
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233 // value: https://github.com/rust-lang/rust/issues/34162 |
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234 vec.sort_unstable_by(|a, b| sort_key(a).cmp(sort_key(b))); |
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235 vec |
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236 } |
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237 ChildNodesRef::OnDisk(nodes) => { |
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238 // Nodes on disk are already sorted |
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239 nodes.iter().map(NodeRef::OnDisk).collect() |
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240 } |
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241 } |
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242 } |
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243 } |
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244 |
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245 impl<'tree, 'on_disk> NodeRef<'tree, 'on_disk> { |
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246 pub(super) fn full_path( |
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247 &self, |
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248 on_disk: &'on_disk [u8], |
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249 ) -> Result<&'tree HgPath, DirstateV2ParseError> { |
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250 match self { |
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251 NodeRef::InMemory(path, _node) => Ok(path.full_path()), |
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252 NodeRef::OnDisk(node) => node.full_path(on_disk), |
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253 } |
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254 } |
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255 |
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256 /// Returns a `BorrowedPath`, which can be turned into a `Cow<'on_disk, |
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257 /// HgPath>` detached from `'tree` |
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258 pub(super) fn full_path_borrowed( |
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259 &self, |
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260 on_disk: &'on_disk [u8], |
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261 ) -> Result<BorrowedPath<'tree, 'on_disk>, DirstateV2ParseError> { |
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262 match self { |
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263 NodeRef::InMemory(path, _node) => match path.full_path() { |
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264 Cow::Borrowed(on_disk) => Ok(BorrowedPath::OnDisk(on_disk)), |
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265 Cow::Owned(in_memory) => Ok(BorrowedPath::InMemory(in_memory)), |
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266 }, |
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267 NodeRef::OnDisk(node) => { |
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268 Ok(BorrowedPath::OnDisk(node.full_path(on_disk)?)) |
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269 } |
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270 } |
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271 } |
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272 |
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273 pub(super) fn base_name( |
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274 &self, |
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275 on_disk: &'on_disk [u8], |
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276 ) -> Result<&'tree HgPath, DirstateV2ParseError> { |
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277 match self { |
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278 NodeRef::InMemory(path, _node) => Ok(path.base_name()), |
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279 NodeRef::OnDisk(node) => node.base_name(on_disk), |
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280 } |
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281 } |
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282 |
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283 pub(super) fn children( |
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284 &self, |
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285 on_disk: &'on_disk [u8], |
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286 ) -> Result<ChildNodesRef<'tree, 'on_disk>, DirstateV2ParseError> { |
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287 match self { |
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288 NodeRef::InMemory(_path, node) => Ok(node.children.as_ref()), |
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289 NodeRef::OnDisk(node) => { |
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290 Ok(ChildNodesRef::OnDisk(node.children(on_disk)?)) |
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291 } |
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292 } |
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293 } |
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294 |
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295 pub(super) fn has_copy_source(&self) -> bool { |
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296 match self { |
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297 NodeRef::InMemory(_path, node) => node.copy_source.is_some(), |
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298 NodeRef::OnDisk(node) => node.has_copy_source(), |
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299 } |
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300 } |
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301 |
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302 pub(super) fn copy_source( |
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303 &self, |
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304 on_disk: &'on_disk [u8], |
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305 ) -> Result<Option<&'tree HgPath>, DirstateV2ParseError> { |
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306 match self { |
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307 NodeRef::InMemory(_path, node) => { |
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308 Ok(node.copy_source.as_ref().map(|s| &**s)) |
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309 } |
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310 NodeRef::OnDisk(node) => node.copy_source(on_disk), |
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311 } |
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312 } |
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313 /// Returns a `BorrowedPath`, which can be turned into a `Cow<'on_disk, |
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314 /// HgPath>` detached from `'tree` |
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315 pub(super) fn copy_source_borrowed( |
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316 &self, |
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317 on_disk: &'on_disk [u8], |
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318 ) -> Result<Option<BorrowedPath<'tree, 'on_disk>>, DirstateV2ParseError> |
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319 { |
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320 Ok(match self { |
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321 NodeRef::InMemory(_path, node) => { |
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322 node.copy_source.as_ref().map(|source| match source { |
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323 Cow::Borrowed(on_disk) => BorrowedPath::OnDisk(on_disk), |
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324 Cow::Owned(in_memory) => BorrowedPath::InMemory(in_memory), |
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325 }) |
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326 } |
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327 NodeRef::OnDisk(node) => node |
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328 .copy_source(on_disk)? |
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329 .map(|source| BorrowedPath::OnDisk(source)), |
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330 }) |
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331 } |
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332 |
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333 pub(super) fn entry( |
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334 &self, |
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335 ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
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336 match self { |
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337 NodeRef::InMemory(_path, node) => { |
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338 Ok(node.data.as_entry().copied()) |
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339 } |
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340 NodeRef::OnDisk(node) => node.entry(), |
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341 } |
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342 } |
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343 |
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344 pub(super) fn state( |
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345 &self, |
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346 ) -> Result<Option<EntryState>, DirstateV2ParseError> { |
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347 Ok(self.entry()?.and_then(|e| { |
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348 if e.any_tracked() { |
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349 Some(e.state()) |
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350 } else { |
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351 None |
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352 } |
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353 })) |
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354 } |
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355 |
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356 pub(super) fn cached_directory_mtime( |
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357 &self, |
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358 ) -> Result<Option<TruncatedTimestamp>, DirstateV2ParseError> { |
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359 match self { |
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360 NodeRef::InMemory(_path, node) => Ok(match node.data { |
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361 NodeData::CachedDirectory { mtime } => Some(mtime), |
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362 _ => None, |
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363 }), |
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364 NodeRef::OnDisk(node) => node.cached_directory_mtime(), |
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365 } |
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366 } |
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367 |
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368 pub(super) fn descendants_with_entry_count(&self) -> u32 { |
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369 match self { |
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370 NodeRef::InMemory(_path, node) => { |
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371 node.descendants_with_entry_count |
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372 } |
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373 NodeRef::OnDisk(node) => node.descendants_with_entry_count.get(), |
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374 } |
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375 } |
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376 |
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377 pub(super) fn tracked_descendants_count(&self) -> u32 { |
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378 match self { |
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379 NodeRef::InMemory(_path, node) => node.tracked_descendants_count, |
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380 NodeRef::OnDisk(node) => node.tracked_descendants_count.get(), |
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381 } |
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382 } |
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383 } |
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384 |
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385 /// Represents a file or a directory |
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386 #[derive(Default)] |
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387 pub(super) struct Node<'on_disk> { |
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388 pub(super) data: NodeData, |
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389 |
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390 pub(super) copy_source: Option<Cow<'on_disk, HgPath>>, |
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391 |
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392 pub(super) children: ChildNodes<'on_disk>, |
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393 |
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394 /// How many (non-inclusive) descendants of this node have an entry. |
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395 pub(super) descendants_with_entry_count: u32, |
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396 |
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397 /// How many (non-inclusive) descendants of this node have an entry whose |
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398 /// state is "tracked". |
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399 pub(super) tracked_descendants_count: u32, |
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400 } |
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401 |
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402 pub(super) enum NodeData { |
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403 Entry(DirstateEntry), |
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404 CachedDirectory { mtime: TruncatedTimestamp }, |
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405 None, |
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406 } |
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407 |
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408 impl Default for NodeData { |
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409 fn default() -> Self { |
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410 NodeData::None |
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411 } |
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412 } |
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413 |
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414 impl NodeData { |
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415 fn has_entry(&self) -> bool { |
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416 match self { |
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417 NodeData::Entry(_) => true, |
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418 _ => false, |
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419 } |
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420 } |
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421 |
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422 fn as_entry(&self) -> Option<&DirstateEntry> { |
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423 match self { |
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424 NodeData::Entry(entry) => Some(entry), |
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425 _ => None, |
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426 } |
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427 } |
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428 |
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429 fn as_entry_mut(&mut self) -> Option<&mut DirstateEntry> { |
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430 match self { |
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431 NodeData::Entry(entry) => Some(entry), |
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432 _ => None, |
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433 } |
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434 } |
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435 } |
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436 |
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437 impl<'on_disk> DirstateMap<'on_disk> { |
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438 pub(super) fn empty(on_disk: &'on_disk [u8]) -> Self { |
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439 Self { |
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440 on_disk, |
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441 root: ChildNodes::default(), |
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442 nodes_with_entry_count: 0, |
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443 nodes_with_copy_source_count: 0, |
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444 ignore_patterns_hash: [0; on_disk::IGNORE_PATTERNS_HASH_LEN], |
47681
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445 unreachable_bytes: 0, |
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446 } |
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447 } |
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448 |
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449 #[timed] |
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450 pub fn new_v2( |
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451 on_disk: &'on_disk [u8], |
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452 data_size: usize, |
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453 metadata: &[u8], |
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454 ) -> Result<Self, DirstateError> { |
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455 if let Some(data) = on_disk.get(..data_size) { |
47682
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456 Ok(on_disk::read(data, metadata)?) |
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457 } else { |
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458 Err(DirstateV2ParseError.into()) |
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459 } |
47280
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460 } |
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461 |
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462 #[timed] |
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|
463 pub fn new_v1( |
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464 on_disk: &'on_disk [u8], |
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465 ) -> Result<(Self, Option<DirstateParents>), DirstateError> { |
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466 let mut map = Self::empty(on_disk); |
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467 if map.on_disk.is_empty() { |
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468 return Ok((map, None)); |
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|
469 } |
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470 |
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471 let parents = parse_dirstate_entries( |
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472 map.on_disk, |
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473 |path, entry, copy_source| { |
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474 let tracked = entry.state().is_tracked(); |
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|
475 let node = Self::get_or_insert_node( |
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476 map.on_disk, |
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477 &mut map.unreachable_bytes, |
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478 &mut map.root, |
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479 path, |
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480 WithBasename::to_cow_borrowed, |
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481 |ancestor| { |
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482 if tracked { |
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483 ancestor.tracked_descendants_count += 1 |
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484 } |
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485 ancestor.descendants_with_entry_count += 1 |
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486 }, |
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487 )?; |
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488 assert!( |
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489 !node.data.has_entry(), |
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490 "duplicate dirstate entry in read" |
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491 ); |
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492 assert!( |
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493 node.copy_source.is_none(), |
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494 "duplicate dirstate entry in read" |
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495 ); |
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496 node.data = NodeData::Entry(*entry); |
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497 node.copy_source = copy_source.map(Cow::Borrowed); |
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498 map.nodes_with_entry_count += 1; |
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499 if copy_source.is_some() { |
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500 map.nodes_with_copy_source_count += 1 |
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501 } |
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502 Ok(()) |
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503 }, |
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504 )?; |
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505 let parents = Some(parents.clone()); |
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506 |
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507 Ok((map, parents)) |
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508 } |
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509 |
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510 /// Assuming dirstate-v2 format, returns whether the next write should |
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511 /// append to the existing data file that contains `self.on_disk` (true), |
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512 /// or create a new data file from scratch (false). |
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513 pub(super) fn write_should_append(&self) -> bool { |
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514 let ratio = self.unreachable_bytes as f32 / self.on_disk.len() as f32; |
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515 ratio < ACCEPTABLE_UNREACHABLE_BYTES_RATIO |
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516 } |
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517 |
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518 fn get_node<'tree>( |
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519 &'tree self, |
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520 path: &HgPath, |
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521 ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> { |
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522 let mut children = self.root.as_ref(); |
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523 let mut components = path.components(); |
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524 let mut component = |
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525 components.next().expect("expected at least one components"); |
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526 loop { |
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527 if let Some(child) = children.get(component, self.on_disk)? { |
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528 if let Some(next_component) = components.next() { |
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529 component = next_component; |
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530 children = child.children(self.on_disk)?; |
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531 } else { |
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532 return Ok(Some(child)); |
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533 } |
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534 } else { |
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535 return Ok(None); |
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536 } |
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537 } |
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538 } |
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539 |
47106
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540 /// Returns a mutable reference to the node at `path` if it exists |
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541 /// |
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542 /// This takes `root` instead of `&mut self` so that callers can mutate |
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543 /// other fields while the returned borrow is still valid |
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544 fn get_node_mut<'tree>( |
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545 on_disk: &'on_disk [u8], |
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546 unreachable_bytes: &mut u32, |
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547 root: &'tree mut ChildNodes<'on_disk>, |
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548 path: &HgPath, |
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549 ) -> Result<Option<&'tree mut Node<'on_disk>>, DirstateV2ParseError> { |
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550 let mut children = root; |
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551 let mut components = path.components(); |
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552 let mut component = |
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553 components.next().expect("expected at least one components"); |
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554 loop { |
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555 if let Some(child) = children |
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556 .make_mut(on_disk, unreachable_bytes)? |
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557 .get_mut(component) |
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558 { |
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559 if let Some(next_component) = components.next() { |
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560 component = next_component; |
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561 children = &mut child.children; |
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562 } else { |
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563 return Ok(Some(child)); |
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|
564 } |
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565 } else { |
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|
566 return Ok(None); |
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567 } |
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568 } |
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569 } |
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570 |
47474
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|
571 pub(super) fn get_or_insert<'tree, 'path>( |
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572 &'tree mut self, |
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573 path: &HgPath, |
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574 ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> { |
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575 Self::get_or_insert_node( |
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576 self.on_disk, |
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577 &mut self.unreachable_bytes, |
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578 &mut self.root, |
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579 path, |
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580 WithBasename::to_cow_owned, |
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581 |_| {}, |
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582 ) |
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583 } |
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584 |
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|
585 fn get_or_insert_node<'tree, 'path>( |
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586 on_disk: &'on_disk [u8], |
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587 unreachable_bytes: &mut u32, |
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588 root: &'tree mut ChildNodes<'on_disk>, |
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589 path: &'path HgPath, |
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590 to_cow: impl Fn( |
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591 WithBasename<&'path HgPath>, |
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592 ) -> WithBasename<Cow<'on_disk, HgPath>>, |
47120
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|
593 mut each_ancestor: impl FnMut(&mut Node), |
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594 ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> { |
47103
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|
595 let mut child_nodes = root; |
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596 let mut inclusive_ancestor_paths = |
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597 WithBasename::inclusive_ancestors_of(path); |
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598 let mut ancestor_path = inclusive_ancestor_paths |
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599 .next() |
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600 .expect("expected at least one inclusive ancestor"); |
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601 loop { |
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602 let (_, child_node) = child_nodes |
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603 .make_mut(on_disk, unreachable_bytes)? |
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604 .raw_entry_mut() |
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605 .from_key(ancestor_path.base_name()) |
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606 .or_insert_with(|| (to_cow(ancestor_path), Node::default())); |
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607 if let Some(next) = inclusive_ancestor_paths.next() { |
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608 each_ancestor(child_node); |
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609 ancestor_path = next; |
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610 child_nodes = &mut child_node.children; |
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611 } else { |
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612 return Ok(child_node); |
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613 } |
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614 } |
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615 } |
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616 |
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617 fn reset_state( |
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618 &mut self, |
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619 filename: &HgPath, |
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620 old_entry_opt: Option<DirstateEntry>, |
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621 wc_tracked: bool, |
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622 p1_tracked: bool, |
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623 p2_info: bool, |
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624 has_meaningful_mtime: bool, |
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625 parent_file_data_opt: Option<ParentFileData>, |
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626 ) -> Result<(), DirstateError> { |
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627 let (had_entry, was_tracked) = match old_entry_opt { |
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628 Some(old_entry) => (true, old_entry.tracked()), |
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629 None => (false, false), |
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630 }; |
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631 let node = Self::get_or_insert_node( |
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632 self.on_disk, |
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633 &mut self.unreachable_bytes, |
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634 &mut self.root, |
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635 filename, |
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636 WithBasename::to_cow_owned, |
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637 |ancestor| { |
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638 if !had_entry { |
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639 ancestor.descendants_with_entry_count += 1; |
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640 } |
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641 if was_tracked { |
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642 if !wc_tracked { |
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643 ancestor.tracked_descendants_count = ancestor |
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644 .tracked_descendants_count |
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645 .checked_sub(1) |
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646 .expect("tracked count to be >= 0"); |
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647 } |
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648 } else { |
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649 if wc_tracked { |
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650 ancestor.tracked_descendants_count += 1; |
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651 } |
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652 } |
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653 }, |
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654 )?; |
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655 |
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656 let v2_data = if let Some(parent_file_data) = parent_file_data_opt { |
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657 DirstateV2Data { |
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658 wc_tracked, |
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659 p1_tracked, |
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660 p2_info, |
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661 mode_size: parent_file_data.mode_size, |
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662 mtime: if has_meaningful_mtime { |
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663 parent_file_data.mtime |
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664 } else { |
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665 None |
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666 }, |
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667 ..Default::default() |
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668 } |
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669 } else { |
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670 DirstateV2Data { |
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671 wc_tracked, |
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672 p1_tracked, |
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673 p2_info, |
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674 ..Default::default() |
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675 } |
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676 }; |
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677 if !had_entry { |
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678 self.nodes_with_entry_count += 1; |
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679 } |
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680 node.data = NodeData::Entry(DirstateEntry::from_v2_data(v2_data)); |
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681 Ok(()) |
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682 } |
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683 |
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684 fn set_tracked( |
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685 &mut self, |
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686 filename: &HgPath, |
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687 old_entry_opt: Option<DirstateEntry>, |
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688 ) -> Result<bool, DirstateV2ParseError> { |
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689 let was_tracked = old_entry_opt.map_or(false, |e| e.tracked()); |
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690 let had_entry = old_entry_opt.is_some(); |
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691 let tracked_count_increment = if was_tracked { 0 } else { 1 }; |
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692 let mut new = false; |
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693 |
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694 let node = Self::get_or_insert_node( |
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695 self.on_disk, |
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696 &mut self.unreachable_bytes, |
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697 &mut self.root, |
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698 filename, |
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699 WithBasename::to_cow_owned, |
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700 |ancestor| { |
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701 if !had_entry { |
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702 ancestor.descendants_with_entry_count += 1; |
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703 } |
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704 |
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705 ancestor.tracked_descendants_count += tracked_count_increment; |
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706 }, |
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707 )?; |
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708 let new_entry = if let Some(old_entry) = old_entry_opt { |
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709 let mut e = old_entry.clone(); |
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710 if e.tracked() { |
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711 // XXX |
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712 // This is probably overkill for more case, but we need this to |
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713 // fully replace the `normallookup` call with `set_tracked` |
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714 // one. Consider smoothing this in the future. |
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715 e.set_possibly_dirty(); |
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716 } else { |
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717 new = true; |
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718 e.set_tracked(); |
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719 } |
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720 e |
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721 } else { |
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722 self.nodes_with_entry_count += 1; |
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723 new = true; |
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724 DirstateEntry::new_tracked() |
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725 }; |
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726 node.data = NodeData::Entry(new_entry); |
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727 Ok(new) |
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728 } |
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729 |
49108
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730 /// It is the responsibility of the caller to know that there was an entry |
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731 /// there before. Does not handle the removal of copy source |
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732 fn set_untracked( |
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733 &mut self, |
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734 filename: &HgPath, |
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735 old_entry: DirstateEntry, |
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736 ) -> Result<(), DirstateV2ParseError> { |
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737 let node = Self::get_or_insert_node( |
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738 self.on_disk, |
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739 &mut self.unreachable_bytes, |
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740 &mut self.root, |
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741 filename, |
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742 WithBasename::to_cow_owned, |
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743 |ancestor| { |
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744 ancestor.tracked_descendants_count = ancestor |
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745 .tracked_descendants_count |
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746 .checked_sub(1) |
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747 .expect("tracked_descendants_count should be >= 0"); |
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748 }, |
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749 )?; |
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750 let mut new_entry = old_entry.clone(); |
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751 new_entry.set_untracked(); |
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752 node.data = NodeData::Entry(new_entry); |
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753 Ok(()) |
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754 } |
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755 |
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756 fn set_clean( |
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757 &mut self, |
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758 filename: &HgPath, |
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759 old_entry: DirstateEntry, |
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760 mode: u32, |
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761 size: u32, |
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762 mtime: TruncatedTimestamp, |
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763 ) -> Result<(), DirstateError> { |
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764 let node = Self::get_or_insert_node( |
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765 self.on_disk, |
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766 &mut self.unreachable_bytes, |
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767 &mut self.root, |
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768 filename, |
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769 WithBasename::to_cow_owned, |
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770 |ancestor| { |
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771 if !old_entry.tracked() { |
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772 ancestor.tracked_descendants_count += 1; |
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773 } |
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774 }, |
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775 )?; |
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776 let mut new_entry = old_entry.clone(); |
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777 new_entry.set_clean(mode, size, mtime); |
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778 node.data = NodeData::Entry(new_entry); |
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779 Ok(()) |
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780 } |
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781 |
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782 fn set_possibly_dirty( |
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783 &mut self, |
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784 filename: &HgPath, |
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785 ) -> Result<(), DirstateError> { |
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786 let node = Self::get_or_insert_node( |
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787 self.on_disk, |
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788 &mut self.unreachable_bytes, |
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789 &mut self.root, |
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790 filename, |
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791 WithBasename::to_cow_owned, |
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792 |_ancestor| {}, |
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793 )?; |
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794 let entry = node.data.as_entry_mut().expect("entry should exist"); |
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795 entry.set_possibly_dirty(); |
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796 node.data = NodeData::Entry(*entry); |
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797 Ok(()) |
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798 } |
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799 |
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800 fn iter_nodes<'tree>( |
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801 &'tree self, |
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802 ) -> impl Iterator< |
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803 Item = Result<NodeRef<'tree, 'on_disk>, DirstateV2ParseError>, |
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804 > + 'tree { |
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805 // Depth first tree traversal. |
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806 // |
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807 // If we could afford internal iteration and recursion, |
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808 // this would look like: |
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809 // |
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810 // ``` |
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811 // fn traverse_children( |
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812 // children: &ChildNodes, |
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813 // each: &mut impl FnMut(&Node), |
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814 // ) { |
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815 // for child in children.values() { |
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816 // traverse_children(&child.children, each); |
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817 // each(child); |
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818 // } |
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819 // } |
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820 // ``` |
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821 // |
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822 // However we want an external iterator and therefore can’t use the |
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823 // call stack. Use an explicit stack instead: |
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824 let mut stack = Vec::new(); |
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825 let mut iter = self.root.as_ref().iter(); |
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826 std::iter::from_fn(move || { |
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827 while let Some(child_node) = iter.next() { |
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828 let children = match child_node.children(self.on_disk) { |
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829 Ok(children) => children, |
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830 Err(error) => return Some(Err(error)), |
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831 }; |
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832 // Pseudo-recursion |
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833 let new_iter = children.iter(); |
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834 let old_iter = std::mem::replace(&mut iter, new_iter); |
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835 stack.push((child_node, old_iter)); |
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836 } |
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837 // Found the end of a `children.iter()` iterator. |
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838 if let Some((child_node, next_iter)) = stack.pop() { |
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839 // "Return" from pseudo-recursion by restoring state from the |
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840 // explicit stack |
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841 iter = next_iter; |
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842 |
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843 Some(Ok(child_node)) |
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844 } else { |
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845 // Reached the bottom of the stack, we’re done |
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846 None |
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847 } |
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848 }) |
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849 } |
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850 |
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851 fn count_dropped_path(unreachable_bytes: &mut u32, path: &Cow<HgPath>) { |
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852 if let Cow::Borrowed(path) = path { |
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853 *unreachable_bytes += path.len() as u32 |
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854 } |
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855 } |
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856 } |
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857 |
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858 /// Like `Iterator::filter_map`, but over a fallible iterator of `Result`s. |
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859 /// |
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860 /// The callback is only called for incoming `Ok` values. Errors are passed |
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861 /// through as-is. In order to let it use the `?` operator the callback is |
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862 /// expected to return a `Result` of `Option`, instead of an `Option` of |
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863 /// `Result`. |
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864 fn filter_map_results<'a, I, F, A, B, E>( |
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865 iter: I, |
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866 f: F, |
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867 ) -> impl Iterator<Item = Result<B, E>> + 'a |
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868 where |
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869 I: Iterator<Item = Result<A, E>> + 'a, |
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870 F: Fn(A) -> Result<Option<B>, E> + 'a, |
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871 { |
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872 iter.filter_map(move |result| match result { |
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873 Ok(node) => f(node).transpose(), |
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874 Err(e) => Some(Err(e)), |
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875 }) |
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876 } |
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877 |
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878 impl OwningDirstateMap { |
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879 pub fn clear(&mut self) { |
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880 self.with_dmap_mut(|map| { |
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881 map.root = Default::default(); |
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882 map.nodes_with_entry_count = 0; |
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883 map.nodes_with_copy_source_count = 0; |
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884 }); |
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885 } |
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886 |
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887 pub fn set_entry( |
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888 &mut self, |
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889 filename: &HgPath, |
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890 entry: DirstateEntry, |
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891 ) -> Result<(), DirstateV2ParseError> { |
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892 self.with_dmap_mut(|map| { |
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893 map.get_or_insert(&filename)?.data = NodeData::Entry(entry); |
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894 Ok(()) |
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895 }) |
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896 } |
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897 |
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898 pub fn set_tracked( |
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899 &mut self, |
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900 filename: &HgPath, |
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901 ) -> Result<bool, DirstateV2ParseError> { |
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902 let old_entry_opt = self.get(filename)?; |
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903 self.with_dmap_mut(|map| map.set_tracked(filename, old_entry_opt)) |
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904 } |
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905 |
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906 pub fn set_untracked( |
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907 &mut self, |
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908 filename: &HgPath, |
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909 ) -> Result<bool, DirstateError> { |
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910 let old_entry_opt = self.get(filename)?; |
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911 match old_entry_opt { |
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912 None => Ok(false), |
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913 Some(old_entry) => { |
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914 if !old_entry.tracked() { |
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915 // `DirstateMap::set_untracked` is not a noop if |
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916 // already not tracked as it will decrement the |
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|
917 // tracked counters while going down. |
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|
918 return Ok(true); |
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919 } |
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|
920 if old_entry.added() { |
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|
921 // Untracking an "added" entry will just result in a |
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922 // worthless entry (and other parts of the code will |
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923 // complain about it), just drop it entirely. |
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924 self.drop_entry_and_copy_source(filename)?; |
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925 return Ok(true); |
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|
926 } |
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|
927 if !old_entry.p2_info() { |
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928 self.copy_map_remove(filename)?; |
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929 } |
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930 |
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|
931 self.with_dmap_mut(|map| { |
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|
932 map.set_untracked(filename, old_entry)?; |
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|
933 Ok(true) |
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|
934 }) |
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|
935 } |
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936 } |
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937 } |
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|
938 |
49104
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|
939 pub fn set_clean( |
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940 &mut self, |
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941 filename: &HgPath, |
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942 mode: u32, |
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943 size: u32, |
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|
944 mtime: TruncatedTimestamp, |
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945 ) -> Result<(), DirstateError> { |
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946 let old_entry = match self.get(filename)? { |
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947 None => { |
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948 return Err( |
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|
949 DirstateMapError::PathNotFound(filename.into()).into() |
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950 ) |
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951 } |
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952 Some(e) => e, |
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953 }; |
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954 self.copy_map_remove(filename)?; |
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955 self.with_dmap_mut(|map| { |
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956 map.set_clean(filename, old_entry, mode, size, mtime) |
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957 }) |
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958 } |
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|
959 |
49106
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|
960 pub fn set_possibly_dirty( |
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961 &mut self, |
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962 filename: &HgPath, |
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963 ) -> Result<(), DirstateError> { |
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964 if self.get(filename)?.is_none() { |
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965 return Err(DirstateMapError::PathNotFound(filename.into()).into()); |
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966 } |
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967 self.with_dmap_mut(|map| map.set_possibly_dirty(filename)) |
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968 } |
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969 |
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970 pub fn reset_state( |
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971 &mut self, |
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972 filename: &HgPath, |
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973 wc_tracked: bool, |
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974 p1_tracked: bool, |
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975 p2_info: bool, |
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976 has_meaningful_mtime: bool, |
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977 parent_file_data_opt: Option<ParentFileData>, |
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978 ) -> Result<(), DirstateError> { |
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979 if !(p1_tracked || p2_info || wc_tracked) { |
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980 self.drop_entry_and_copy_source(filename)?; |
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981 return Ok(()); |
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982 } |
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983 self.copy_map_remove(filename)?; |
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|
984 let old_entry_opt = self.get(filename)?; |
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985 self.with_dmap_mut(|map| { |
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986 map.reset_state( |
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987 filename, |
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988 old_entry_opt, |
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989 wc_tracked, |
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990 p1_tracked, |
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991 p2_info, |
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992 has_meaningful_mtime, |
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993 parent_file_data_opt, |
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994 ) |
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995 }) |
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996 } |
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|
997 |
48069
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|
998 pub fn drop_entry_and_copy_source( |
48050
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999 &mut self, |
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1000 filename: &HgPath, |
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1001 ) -> Result<(), DirstateError> { |
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1002 let was_tracked = self |
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1003 .get(filename)? |
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|
1004 .map_or(false, |e| e.state().is_tracked()); |
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|
1005 struct Dropped { |
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1006 was_tracked: bool, |
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1007 had_entry: bool, |
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1008 had_copy_source: bool, |
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1009 } |
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1010 |
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1011 /// If this returns `Ok(Some((dropped, removed)))`, then |
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1012 /// |
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1013 /// * `dropped` is about the leaf node that was at `filename` |
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1014 /// * `removed` is whether this particular level of recursion just |
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1015 /// removed a node in `nodes`. |
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1016 fn recur<'on_disk>( |
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1017 on_disk: &'on_disk [u8], |
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1018 unreachable_bytes: &mut u32, |
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1019 nodes: &mut ChildNodes<'on_disk>, |
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|
1020 path: &HgPath, |
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1021 ) -> Result<Option<(Dropped, bool)>, DirstateV2ParseError> { |
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1022 let (first_path_component, rest_of_path) = |
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1023 path.split_first_component(); |
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1024 let nodes = nodes.make_mut(on_disk, unreachable_bytes)?; |
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1025 let node = if let Some(node) = nodes.get_mut(first_path_component) |
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1026 { |
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1027 node |
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1028 } else { |
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1029 return Ok(None); |
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1030 }; |
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1031 let dropped; |
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1032 if let Some(rest) = rest_of_path { |
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1033 if let Some((d, removed)) = recur( |
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1034 on_disk, |
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1035 unreachable_bytes, |
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1036 &mut node.children, |
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1037 rest, |
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1038 )? { |
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1039 dropped = d; |
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1040 if dropped.had_entry { |
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1041 node.descendants_with_entry_count = node |
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1042 .descendants_with_entry_count |
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1043 .checked_sub(1) |
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1044 .expect( |
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1045 "descendants_with_entry_count should be >= 0", |
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1046 ); |
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1047 } |
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1048 if dropped.was_tracked { |
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1049 node.tracked_descendants_count = node |
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1050 .tracked_descendants_count |
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1051 .checked_sub(1) |
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1052 .expect( |
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1053 "tracked_descendants_count should be >= 0", |
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1054 ); |
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1055 } |
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1056 |
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1057 // Directory caches must be invalidated when removing a |
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1058 // child node |
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1059 if removed { |
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1060 if let NodeData::CachedDirectory { .. } = &node.data { |
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1061 node.data = NodeData::None |
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1062 } |
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1063 } |
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1064 } else { |
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1065 return Ok(None); |
47120
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1066 } |
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1067 } else { |
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1068 let entry = node.data.as_entry(); |
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1069 let was_tracked = entry.map_or(false, |entry| entry.tracked()); |
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1070 let had_entry = entry.is_some(); |
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1071 if had_entry { |
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1072 node.data = NodeData::None |
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1073 } |
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1074 let mut had_copy_source = false; |
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1075 if let Some(source) = &node.copy_source { |
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1076 DirstateMap::count_dropped_path(unreachable_bytes, source); |
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1077 had_copy_source = true; |
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1078 node.copy_source = None |
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1079 } |
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1080 dropped = Dropped { |
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1081 was_tracked, |
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1082 had_entry, |
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1083 had_copy_source, |
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1084 }; |
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1085 } |
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1086 // After recursion, for both leaf (rest_of_path is None) nodes and |
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1087 // parent nodes, remove a node if it just became empty. |
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1088 let remove = !node.data.has_entry() |
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1089 && node.copy_source.is_none() |
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1090 && node.children.is_empty(); |
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1091 if remove { |
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1092 let (key, _) = |
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1093 nodes.remove_entry(first_path_component).unwrap(); |
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1094 DirstateMap::count_dropped_path( |
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1095 unreachable_bytes, |
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1096 key.full_path(), |
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1097 ) |
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1098 } |
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1099 Ok(Some((dropped, remove))) |
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1100 } |
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1101 |
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1102 self.with_dmap_mut(|map| { |
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1103 if let Some((dropped, _removed)) = recur( |
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1104 map.on_disk, |
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1105 &mut map.unreachable_bytes, |
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1106 &mut map.root, |
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1107 filename, |
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1108 )? { |
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1109 if dropped.had_entry { |
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1110 map.nodes_with_entry_count = map |
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1111 .nodes_with_entry_count |
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1112 .checked_sub(1) |
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1113 .expect("nodes_with_entry_count should be >= 0"); |
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1114 } |
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1115 if dropped.had_copy_source { |
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1116 map.nodes_with_copy_source_count = map |
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1117 .nodes_with_copy_source_count |
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1118 .checked_sub(1) |
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1119 .expect("nodes_with_copy_source_count should be >= 0"); |
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1120 } |
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1121 } else { |
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1122 debug_assert!(!was_tracked); |
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1123 } |
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1124 Ok(()) |
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1125 }) |
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1126 } |
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1127 |
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1128 pub fn has_tracked_dir( |
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1129 &mut self, |
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1130 directory: &HgPath, |
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1131 ) -> Result<bool, DirstateError> { |
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1132 self.with_dmap_mut(|map| { |
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1133 if let Some(node) = map.get_node(directory)? { |
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1134 // A node without a `DirstateEntry` was created to hold child |
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1135 // nodes, and is therefore a directory. |
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1136 let state = node.state()?; |
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1137 Ok(state.is_none() && node.tracked_descendants_count() > 0) |
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1138 } else { |
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1139 Ok(false) |
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1140 } |
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1141 }) |
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1142 } |
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1143 |
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1144 pub fn has_dir( |
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1145 &mut self, |
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1146 directory: &HgPath, |
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1147 ) -> Result<bool, DirstateError> { |
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1148 self.with_dmap_mut(|map| { |
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1149 if let Some(node) = map.get_node(directory)? { |
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1150 // A node without a `DirstateEntry` was created to hold child |
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1151 // nodes, and is therefore a directory. |
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1152 let state = node.state()?; |
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1153 Ok(state.is_none() && node.descendants_with_entry_count() > 0) |
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1154 } else { |
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1155 Ok(false) |
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1156 } |
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1157 }) |
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1158 } |
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1159 |
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1160 #[timed] |
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1161 pub fn pack_v1( |
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1162 &self, |
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1163 parents: DirstateParents, |
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1164 ) -> Result<Vec<u8>, DirstateError> { |
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1165 let map = self.get_map(); |
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1166 // Optizimation (to be measured?): pre-compute size to avoid `Vec` |
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1167 // reallocations |
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1168 let mut size = parents.as_bytes().len(); |
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1169 for node in map.iter_nodes() { |
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1170 let node = node?; |
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1171 if node.entry()?.is_some() { |
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1172 size += packed_entry_size( |
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1173 node.full_path(map.on_disk)?, |
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1174 node.copy_source(map.on_disk)?, |
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1175 ); |
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1176 } |
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1177 } |
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1178 |
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1179 let mut packed = Vec::with_capacity(size); |
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1180 packed.extend(parents.as_bytes()); |
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1181 |
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1182 for node in map.iter_nodes() { |
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1183 let node = node?; |
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1184 if let Some(entry) = node.entry()? { |
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1185 pack_entry( |
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1186 node.full_path(map.on_disk)?, |
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1187 &entry, |
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1188 node.copy_source(map.on_disk)?, |
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1189 &mut packed, |
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1190 ); |
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1191 } |
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1192 } |
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1193 Ok(packed) |
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1194 } |
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1195 |
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1196 /// Returns new data and metadata together with whether that data should be |
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1197 /// appended to the existing data file whose content is at |
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1198 /// `map.on_disk` (true), instead of written to a new data file |
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1199 /// (false). |
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1200 #[timed] |
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1201 pub fn pack_v2( |
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1202 &self, |
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1203 can_append: bool, |
48421
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1204 ) -> Result<(Vec<u8>, on_disk::TreeMetadata, bool), DirstateError> { |
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1205 let map = self.get_map(); |
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1206 on_disk::write(map, can_append) |
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1207 } |
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1208 |
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1209 /// `callback` allows the caller to process and do something with the |
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1210 /// results of the status. This is needed to do so efficiently (i.e. |
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1211 /// without cloning the `DirstateStatus` object with its paths) because |
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1212 /// we need to borrow from `Self`. |
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1213 pub fn with_status<R>( |
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1214 &mut self, |
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1215 matcher: &(dyn Matcher + Sync), |
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1216 root_dir: PathBuf, |
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1217 ignore_files: Vec<PathBuf>, |
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1218 options: StatusOptions, |
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1219 callback: impl for<'r> FnOnce( |
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1220 Result<(DirstateStatus<'r>, Vec<PatternFileWarning>), StatusError>, |
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1221 ) -> R, |
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1222 ) -> R { |
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1223 self.with_dmap_mut(|map| { |
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1224 callback(super::status::status( |
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1225 map, |
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1226 matcher, |
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1227 root_dir, |
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1228 ignore_files, |
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1229 options, |
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1230 )) |
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1231 }) |
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1232 } |
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1233 |
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1234 pub fn copy_map_len(&self) -> usize { |
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1235 let map = self.get_map(); |
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1236 map.nodes_with_copy_source_count as usize |
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1237 } |
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1238 |
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1239 pub fn copy_map_iter(&self) -> CopyMapIter<'_> { |
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1240 let map = self.get_map(); |
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1241 Box::new(filter_map_results(map.iter_nodes(), move |node| { |
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1242 Ok(if let Some(source) = node.copy_source(map.on_disk)? { |
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1243 Some((node.full_path(map.on_disk)?, source)) |
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1244 } else { |
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1245 None |
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1246 }) |
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1247 })) |
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1248 } |
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1249 |
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1250 pub fn copy_map_contains_key( |
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1251 &self, |
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1252 key: &HgPath, |
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1253 ) -> Result<bool, DirstateV2ParseError> { |
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1254 let map = self.get_map(); |
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1255 Ok(if let Some(node) = map.get_node(key)? { |
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1256 node.has_copy_source() |
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1257 } else { |
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1258 false |
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1259 }) |
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1260 } |
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1261 |
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1262 pub fn copy_map_get( |
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1263 &self, |
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1264 key: &HgPath, |
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1265 ) -> Result<Option<&HgPath>, DirstateV2ParseError> { |
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1266 let map = self.get_map(); |
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1267 if let Some(node) = map.get_node(key)? { |
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1268 if let Some(source) = node.copy_source(map.on_disk)? { |
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1269 return Ok(Some(source)); |
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1270 } |
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1271 } |
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1272 Ok(None) |
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1273 } |
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1274 |
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1275 pub fn copy_map_remove( |
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1276 &mut self, |
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1277 key: &HgPath, |
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1278 ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
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1279 self.with_dmap_mut(|map| { |
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1280 let count = &mut map.nodes_with_copy_source_count; |
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1281 let unreachable_bytes = &mut map.unreachable_bytes; |
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1282 Ok(DirstateMap::get_node_mut( |
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1283 map.on_disk, |
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1284 unreachable_bytes, |
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1285 &mut map.root, |
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1286 key, |
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1287 )? |
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1288 .and_then(|node| { |
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1289 if let Some(source) = &node.copy_source { |
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1290 *count -= 1; |
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1291 DirstateMap::count_dropped_path(unreachable_bytes, source); |
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1292 } |
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1293 node.copy_source.take().map(Cow::into_owned) |
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1294 })) |
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1295 }) |
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1296 } |
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1297 |
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1298 pub fn copy_map_insert( |
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1299 &mut self, |
47104
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1300 key: HgPathBuf, |
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1301 value: HgPathBuf, |
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1302 ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
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1303 self.with_dmap_mut(|map| { |
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1304 let node = DirstateMap::get_or_insert_node( |
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1305 map.on_disk, |
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1306 &mut map.unreachable_bytes, |
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1307 &mut map.root, |
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1308 &key, |
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1309 WithBasename::to_cow_owned, |
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1310 |_ancestor| {}, |
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1311 )?; |
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1312 if node.copy_source.is_none() { |
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1313 map.nodes_with_copy_source_count += 1 |
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1314 } |
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1315 Ok(node.copy_source.replace(value.into()).map(Cow::into_owned)) |
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1316 }) |
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1317 } |
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1318 |
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1319 pub fn len(&self) -> usize { |
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1320 let map = self.get_map(); |
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1321 map.nodes_with_entry_count as usize |
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1322 } |
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1323 |
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1324 pub fn contains_key( |
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1325 &self, |
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1326 key: &HgPath, |
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1327 ) -> Result<bool, DirstateV2ParseError> { |
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1328 Ok(self.get(key)?.is_some()) |
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1329 } |
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1330 |
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1331 pub fn get( |
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1332 &self, |
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1333 key: &HgPath, |
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1334 ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
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1335 let map = self.get_map(); |
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1336 Ok(if let Some(node) = map.get_node(key)? { |
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1337 node.entry()? |
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1338 } else { |
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1339 None |
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1340 }) |
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1341 } |
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1342 |
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1343 pub fn iter(&self) -> StateMapIter<'_> { |
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1344 let map = self.get_map(); |
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1345 Box::new(filter_map_results(map.iter_nodes(), move |node| { |
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1346 Ok(if let Some(entry) = node.entry()? { |
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1347 Some((node.full_path(map.on_disk)?, entry)) |
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1348 } else { |
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1349 None |
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1350 }) |
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1351 })) |
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1352 } |
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1353 |
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1354 pub fn iter_tracked_dirs( |
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1355 &mut self, |
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1356 ) -> Result< |
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1357 Box< |
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1358 dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> |
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1359 + Send |
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1360 + '_, |
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1361 >, |
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1362 DirstateError, |
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1363 > { |
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1364 let map = self.get_map(); |
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1365 let on_disk = map.on_disk; |
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1366 Ok(Box::new(filter_map_results( |
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1367 map.iter_nodes(), |
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1368 move |node| { |
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1369 Ok(if node.tracked_descendants_count() > 0 { |
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1370 Some(node.full_path(on_disk)?) |
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1371 } else { |
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1372 None |
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1373 }) |
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1374 }, |
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1375 ))) |
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1376 } |
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1377 |
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1378 /// Only public because it needs to be exposed to the Python layer. |
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1379 /// It is not the full `setparents` logic, only the parts that mutate the |
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1380 /// entries. |
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1381 pub fn setparents_fixup( |
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1382 &mut self, |
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1383 ) -> Result<Vec<(HgPathBuf, HgPathBuf)>, DirstateV2ParseError> { |
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1384 // XXX |
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1385 // All the copying and re-querying is quite inefficient, but this is |
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1386 // still a lot better than doing it from Python. |
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1387 // |
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1388 // The better solution is to develop a mechanism for `iter_mut`, |
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1389 // which will be a lot more involved: we're dealing with a lazy, |
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1390 // append-mostly, tree-like data structure. This will do for now. |
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1391 let mut copies = vec![]; |
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1392 let mut files_with_p2_info = vec![]; |
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1393 for res in self.iter() { |
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1394 let (path, entry) = res?; |
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1395 if entry.p2_info() { |
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1396 files_with_p2_info.push(path.to_owned()) |
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1397 } |
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1398 } |
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1399 self.with_dmap_mut(|map| { |
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1400 for path in files_with_p2_info.iter() { |
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1401 let node = map.get_or_insert(path)?; |
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1402 let entry = |
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1403 node.data.as_entry_mut().expect("entry should exist"); |
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1404 entry.drop_merge_data(); |
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1405 if let Some(source) = node.copy_source.take().as_deref() { |
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1406 copies.push((path.to_owned(), source.to_owned())); |
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1407 } |
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1408 } |
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1409 Ok(copies) |
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1410 }) |
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1411 } |
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1412 |
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1413 pub fn debug_iter( |
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1414 &self, |
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1415 all: bool, |
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1416 ) -> Box< |
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1417 dyn Iterator< |
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1418 Item = Result< |
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1419 (&HgPath, (u8, i32, i32, i32)), |
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1420 DirstateV2ParseError, |
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1421 >, |
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1422 > + Send |
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1423 + '_, |
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1424 > { |
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1425 let map = self.get_map(); |
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1426 Box::new(filter_map_results(map.iter_nodes(), move |node| { |
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1427 let debug_tuple = if let Some(entry) = node.entry()? { |
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1428 entry.debug_tuple() |
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1429 } else if !all { |
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1430 return Ok(None); |
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1431 } else if let Some(mtime) = node.cached_directory_mtime()? { |
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1432 (b' ', 0, -1, mtime.truncated_seconds() as i32) |
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1433 } else { |
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1434 (b' ', 0, -1, -1) |
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1435 }; |
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1436 Ok(Some((node.full_path(map.on_disk)?, debug_tuple))) |
47351
3b9914b28133
dirstate-v2: Add --dirs to debugdirstate command
Simon Sapin <simon.sapin@octobus.net>
parents:
47349
diff
changeset
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1437 })) |
3b9914b28133
dirstate-v2: Add --dirs to debugdirstate command
Simon Sapin <simon.sapin@octobus.net>
parents:
47349
diff
changeset
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1438 } |
47095
473abf4728bf
dirstate-tree: Empty shell for a second Rust DirstateMap implementation
Simon Sapin <simon.sapin@octobus.net>
parents:
diff
changeset
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1439 } |