Mercurial > hg
annotate rust/hg-core/src/dirstate_tree/dirstate_map.rs @ 47120:7109a38830c9
dirstate-tree: Fold "tracked descendants" counter update in main walk
For the purpose of implementing `has_tracked_dir` (which means "has tracked
descendants) without an expensive sub-tree traversal, we maintaing a counter
of tracked descendants on each "directory" node of the tree-shaped dirstate.
Before this changeset, mutating or inserting a node at a given path would
involve:
* Walking the tree from root through ancestors to find the node or the spot
where to insert it
* Looking at the previous node if any to decide what counter update is needed
* Performing any node mutation
* Walking the tree *again* to update counters in ancestor nodes
When profiling `hg status` on a large repo, this second walk takes times
while loading a the dirstate from disk.
It turns out we have enough information to decide before he first tree walk
what counter update is needed. This changeset merges the two walks, gaining
~10% of the total time for `hg update` (in the same hyperfine benchmark as
the previous changeset).
---
Profiling was done by compiling with this `.cargo/config`:
[profile.release]
debug = true
then running with:
py-spy record -r 500 -n -o /tmp/hg.json --format speedscope -- \
./hg status -R $REPO --config experimental.dirstate-tree.in-memory=1
then visualizing the recorded JSON file in https://www.speedscope.app/
Differential Revision: https://phab.mercurial-scm.org/D10554
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Fri, 30 Apr 2021 14:22:14 +0200 |
parents | 15395fd8ab28 |
children | b6339a993b91 |
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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::convert::TryInto; |
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4 use std::path::PathBuf; |
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5 |
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6 use super::path_with_basename::WithBasename; |
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7 use crate::dirstate::parsers::clear_ambiguous_mtime; |
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8 use crate::dirstate::parsers::pack_entry; |
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9 use crate::dirstate::parsers::packed_entry_size; |
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10 use crate::dirstate::parsers::parse_dirstate_entries; |
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11 use crate::dirstate::parsers::parse_dirstate_parents; |
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12 use crate::dirstate::parsers::Timestamp; |
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13 use crate::matchers::Matcher; |
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14 use crate::revlog::node::NULL_NODE; |
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15 use crate::utils::hg_path::{HgPath, HgPathBuf}; |
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16 use crate::CopyMapIter; |
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17 use crate::DirstateEntry; |
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18 use crate::DirstateError; |
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19 use crate::DirstateMapError; |
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20 use crate::DirstateParents; |
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21 use crate::DirstateStatus; |
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22 use crate::EntryState; |
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23 use crate::FastHashMap; |
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24 use crate::PatternFileWarning; |
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25 use crate::StateMapIter; |
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26 use crate::StatusError; |
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27 use crate::StatusOptions; |
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28 |
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29 pub struct DirstateMap { |
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30 parents: Option<DirstateParents>, |
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31 dirty_parents: bool, |
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32 pub(super) root: ChildNodes, |
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33 |
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34 /// Number of nodes anywhere in the tree that have `.entry.is_some()`. |
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35 nodes_with_entry_count: usize, |
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36 |
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37 /// Number of nodes anywhere in the tree that have |
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38 /// `.copy_source.is_some()`. |
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39 nodes_with_copy_source_count: usize, |
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40 } |
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41 |
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42 /// Using a plain `HgPathBuf` of the full path from the repository root as a |
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43 /// map key would also work: all paths in a given map have the same parent |
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44 /// path, so comparing full paths gives the same result as comparing base |
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45 /// names. However `BTreeMap` would waste time always re-comparing the same |
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46 /// string prefix. |
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47 pub(super) type ChildNodes = FastHashMap<WithBasename<HgPathBuf>, Node>; |
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48 |
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49 /// Represents a file or a directory |
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50 #[derive(Default)] |
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51 pub(super) struct Node { |
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52 /// `None` for directories |
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53 pub(super) entry: Option<DirstateEntry>, |
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54 |
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55 pub(super) copy_source: Option<HgPathBuf>, |
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56 |
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57 pub(super) children: ChildNodes, |
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58 |
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59 /// How many (non-inclusive) descendants of this node are tracked files |
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60 tracked_descendants_count: usize, |
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61 } |
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62 |
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63 impl Node { |
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64 pub(super) fn state(&self) -> Option<EntryState> { |
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65 self.entry.as_ref().map(|entry| entry.state) |
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66 } |
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67 } |
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68 |
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69 /// `(full_path, entry, copy_source)` |
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70 type NodeDataMut<'a> = ( |
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71 &'a WithBasename<HgPathBuf>, |
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72 &'a mut Option<DirstateEntry>, |
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73 &'a mut Option<HgPathBuf>, |
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74 ); |
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75 |
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76 impl DirstateMap { |
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77 pub fn new() -> Self { |
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78 Self { |
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79 parents: None, |
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80 dirty_parents: false, |
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81 root: ChildNodes::default(), |
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82 nodes_with_entry_count: 0, |
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83 nodes_with_copy_source_count: 0, |
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84 } |
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85 } |
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86 |
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87 fn get_node(&self, path: &HgPath) -> Option<&Node> { |
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88 let mut children = &self.root; |
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89 let mut components = path.components(); |
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90 let mut component = |
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91 components.next().expect("expected at least one components"); |
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92 loop { |
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93 let child = children.get(component)?; |
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94 if let Some(next_component) = components.next() { |
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95 component = next_component; |
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96 children = &child.children; |
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97 } else { |
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98 return Some(child); |
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99 } |
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100 } |
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101 } |
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102 |
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103 /// Returns a mutable reference to the node at `path` if it exists |
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104 /// |
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105 /// This takes `root` instead of `&mut self` so that callers can mutate |
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106 /// other fields while the returned borrow is still valid |
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107 fn get_node_mut<'tree>( |
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108 root: &'tree mut ChildNodes, |
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109 path: &HgPath, |
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110 ) -> Option<&'tree mut Node> { |
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111 Self::get_node_mut_tracing_ancestors(root, path, |_| {}) |
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112 } |
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113 |
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114 /// Same as `get_node_mut`, and calls `each_ancestor` for each ancestor of |
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115 /// the node. |
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116 /// |
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117 /// Note that `each_ancestor` may be called (with what would be ancestors) |
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118 /// even if it turns out there is no node at `path`. |
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119 fn get_node_mut_tracing_ancestors<'tree>( |
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120 root: &'tree mut ChildNodes, |
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121 path: &HgPath, |
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122 mut each_ancestor: impl FnMut(&mut Node), |
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123 ) -> Option<&'tree mut Node> { |
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124 let mut children = root; |
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125 let mut components = path.components(); |
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126 let mut component = |
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127 components.next().expect("expected at least one components"); |
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128 loop { |
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129 let child = children.get_mut(component)?; |
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130 if let Some(next_component) = components.next() { |
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131 each_ancestor(child); |
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132 component = next_component; |
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133 children = &mut child.children; |
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134 } else { |
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135 return Some(child); |
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136 } |
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137 } |
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138 } |
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139 |
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140 fn get_or_insert_node<'tree>( |
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141 root: &'tree mut ChildNodes, |
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142 path: &HgPath, |
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143 ) -> &'tree mut Node { |
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144 Self::get_or_insert_node_tracing_ancestors(root, path, |_| {}) |
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145 } |
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146 |
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147 fn get_or_insert_node_tracing_ancestors<'tree>( |
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148 root: &'tree mut ChildNodes, |
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149 path: &HgPath, |
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150 mut each_ancestor: impl FnMut(&mut Node), |
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151 ) -> &'tree mut Node { |
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152 let mut child_nodes = root; |
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153 let mut inclusive_ancestor_paths = |
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154 WithBasename::inclusive_ancestors_of(path); |
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155 let mut ancestor_path = inclusive_ancestor_paths |
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156 .next() |
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157 .expect("expected at least one inclusive ancestor"); |
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158 loop { |
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159 // TODO: can we avoid allocating an owned key in cases where the |
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160 // map already contains that key, without introducing double |
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161 // lookup? |
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162 let child_node = |
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163 child_nodes.entry(ancestor_path.to_owned()).or_default(); |
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164 if let Some(next) = inclusive_ancestor_paths.next() { |
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165 each_ancestor(child_node); |
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166 ancestor_path = next; |
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167 child_nodes = &mut child_node.children; |
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168 } else { |
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169 return child_node; |
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170 } |
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171 } |
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172 } |
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173 |
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174 fn add_or_remove_file( |
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175 &mut self, |
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176 path: &HgPath, |
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177 old_state: EntryState, |
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178 new_entry: DirstateEntry, |
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179 ) { |
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180 let tracked_count_increment = |
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181 match (old_state.is_tracked(), new_entry.state.is_tracked()) { |
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182 (false, true) => 1, |
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183 (true, false) => -1, |
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184 _ => 0, |
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185 }; |
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186 |
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187 let node = Self::get_or_insert_node_tracing_ancestors( |
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188 &mut self.root, |
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189 path, |
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190 |ancestor| { |
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191 // We can’t use `+= increment` because the counter is unsigned, |
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192 // and we want debug builds to detect accidental underflow |
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193 // through zero |
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194 match tracked_count_increment { |
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195 1 => ancestor.tracked_descendants_count += 1, |
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196 -1 => ancestor.tracked_descendants_count -= 1, |
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197 _ => {} |
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198 } |
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199 }, |
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200 ); |
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201 if node.entry.is_none() { |
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202 self.nodes_with_entry_count += 1 |
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203 } |
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204 node.entry = Some(new_entry) |
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205 } |
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206 |
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207 fn iter_nodes<'a>( |
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208 &'a self, |
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209 ) -> impl Iterator<Item = (&'a WithBasename<HgPathBuf>, &'a Node)> + 'a |
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210 { |
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211 // Depth first tree traversal. |
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212 // |
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213 // If we could afford internal iteration and recursion, |
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214 // this would look like: |
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215 // |
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216 // ``` |
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217 // fn traverse_children( |
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218 // children: &ChildNodes, |
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219 // each: &mut impl FnMut(&Node), |
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220 // ) { |
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221 // for child in children.values() { |
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222 // traverse_children(&child.children, each); |
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223 // each(child); |
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224 // } |
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225 // } |
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226 // ``` |
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227 // |
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228 // However we want an external iterator and therefore can’t use the |
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229 // call stack. Use an explicit stack instead: |
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230 let mut stack = Vec::new(); |
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231 let mut iter = self.root.iter(); |
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232 std::iter::from_fn(move || { |
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233 while let Some((key, child_node)) = iter.next() { |
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234 // Pseudo-recursion |
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235 let new_iter = child_node.children.iter(); |
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236 let old_iter = std::mem::replace(&mut iter, new_iter); |
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237 stack.push((key, child_node, old_iter)); |
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238 } |
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239 // Found the end of a `children.iter()` iterator. |
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240 if let Some((key, child_node, next_iter)) = stack.pop() { |
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241 // "Return" from pseudo-recursion by restoring state from the |
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242 // explicit stack |
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243 iter = next_iter; |
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244 |
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245 Some((key, child_node)) |
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246 } else { |
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247 // Reached the bottom of the stack, we’re done |
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248 None |
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249 } |
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250 }) |
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251 } |
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252 |
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253 /// Mutable iterator for the `(entry, copy source)` of each node. |
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254 /// |
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255 /// It would not be safe to yield mutable references to nodes themeselves |
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256 /// with `-> impl Iterator<Item = &mut Node>` since child nodes are |
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257 /// reachable from their ancestor nodes, potentially creating multiple |
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258 /// `&mut` references to a given node. |
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259 fn iter_node_data_mut<'a>( |
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260 &'a mut self, |
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261 ) -> impl Iterator<Item = NodeDataMut<'a>> + 'a { |
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262 // Explict stack for pseudo-recursion, see `iter_nodes` above. |
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263 let mut stack = Vec::new(); |
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264 let mut iter = self.root.iter_mut(); |
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265 std::iter::from_fn(move || { |
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266 while let Some((key, child_node)) = iter.next() { |
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267 // Pseudo-recursion |
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268 let data = |
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269 (key, &mut child_node.entry, &mut child_node.copy_source); |
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270 let new_iter = child_node.children.iter_mut(); |
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271 let old_iter = std::mem::replace(&mut iter, new_iter); |
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272 stack.push((data, old_iter)); |
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273 } |
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274 // Found the end of a `children.values_mut()` iterator. |
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275 if let Some((data, next_iter)) = stack.pop() { |
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276 // "Return" from pseudo-recursion by restoring state from the |
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277 // explicit stack |
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278 iter = next_iter; |
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279 |
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280 Some(data) |
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281 } else { |
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282 // Reached the bottom of the stack, we’re done |
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283 None |
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284 } |
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285 }) |
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286 } |
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287 } |
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288 |
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289 impl super::dispatch::DirstateMapMethods for DirstateMap { |
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290 fn clear(&mut self) { |
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291 self.set_parents(&DirstateParents { |
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292 p1: NULL_NODE, |
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293 p2: NULL_NODE, |
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294 }); |
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295 self.root.clear(); |
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296 self.nodes_with_entry_count = 0; |
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297 self.nodes_with_copy_source_count = 0; |
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298 } |
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299 |
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300 fn add_file( |
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301 &mut self, |
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302 filename: &HgPath, |
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303 old_state: EntryState, |
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304 entry: DirstateEntry, |
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305 ) -> Result<(), DirstateMapError> { |
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306 self.add_or_remove_file(filename, old_state, entry); |
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307 Ok(()) |
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308 } |
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309 |
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310 fn remove_file( |
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311 &mut self, |
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312 filename: &HgPath, |
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313 old_state: EntryState, |
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314 size: i32, |
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315 ) -> Result<(), DirstateMapError> { |
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316 let entry = DirstateEntry { |
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317 state: EntryState::Removed, |
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318 mode: 0, |
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319 size, |
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320 mtime: 0, |
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321 }; |
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322 self.add_or_remove_file(filename, old_state, entry); |
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323 Ok(()) |
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324 } |
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325 |
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326 fn drop_file( |
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327 &mut self, |
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328 filename: &HgPath, |
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329 old_state: EntryState, |
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330 ) -> Result<bool, DirstateMapError> { |
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331 let was_tracked = old_state.is_tracked(); |
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332 if let Some(node) = Self::get_node_mut_tracing_ancestors( |
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333 &mut self.root, |
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334 filename, |
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335 |ancestor| { |
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336 if was_tracked { |
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337 ancestor.tracked_descendants_count -= 1 |
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338 } |
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339 }, |
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340 ) { |
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341 let had_entry = node.entry.is_some(); |
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342 let had_copy_source = node.copy_source.is_some(); |
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343 |
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344 // TODO: this leaves in the tree a "non-file" node. Should we |
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345 // remove the node instead, together with ancestor nodes for |
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346 // directories that become empty? |
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347 node.entry = None; |
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348 node.copy_source = None; |
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349 |
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350 if had_entry { |
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351 self.nodes_with_entry_count -= 1 |
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352 } |
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353 if had_copy_source { |
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354 self.nodes_with_copy_source_count -= 1 |
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355 } |
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356 Ok(had_entry) |
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357 } else { |
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358 assert!(!was_tracked); |
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359 Ok(false) |
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360 } |
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361 } |
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362 |
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363 fn clear_ambiguous_times(&mut self, filenames: Vec<HgPathBuf>, now: i32) { |
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364 for filename in filenames { |
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365 if let Some(node) = Self::get_node_mut(&mut self.root, &filename) { |
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366 if let Some(entry) = node.entry.as_mut() { |
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367 clear_ambiguous_mtime(entry, now); |
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368 } |
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369 } |
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370 } |
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371 } |
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372 |
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373 fn non_normal_entries_contains(&mut self, key: &HgPath) -> bool { |
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374 self.get_node(key) |
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375 .and_then(|node| node.entry.as_ref()) |
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376 .map_or(false, DirstateEntry::is_non_normal) |
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377 } |
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378 |
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379 fn non_normal_entries_remove(&mut self, _key: &HgPath) { |
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380 // Do nothing, this `DirstateMap` does not have a separate "non normal |
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381 // entries" set that need to be kept up to date |
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382 } |
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383 |
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384 fn non_normal_or_other_parent_paths( |
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385 &mut self, |
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386 ) -> Box<dyn Iterator<Item = &HgPathBuf> + '_> { |
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387 Box::new(self.iter_nodes().filter_map(|(path, node)| { |
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388 node.entry |
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389 .as_ref() |
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390 .filter(|entry| { |
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391 entry.is_non_normal() || entry.is_from_other_parent() |
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392 }) |
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393 .map(|_| path.full_path()) |
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394 })) |
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395 } |
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396 |
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397 fn set_non_normal_other_parent_entries(&mut self, _force: bool) { |
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398 // Do nothing, this `DirstateMap` does not have a separate "non normal |
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399 // entries" and "from other parent" sets that need to be recomputed |
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400 } |
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401 |
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402 fn iter_non_normal_paths( |
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403 &mut self, |
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404 ) -> Box<dyn Iterator<Item = &HgPathBuf> + Send + '_> { |
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405 self.iter_non_normal_paths_panic() |
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406 } |
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407 |
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408 fn iter_non_normal_paths_panic( |
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409 &self, |
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410 ) -> Box<dyn Iterator<Item = &HgPathBuf> + Send + '_> { |
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411 Box::new(self.iter_nodes().filter_map(|(path, node)| { |
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412 node.entry |
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413 .as_ref() |
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414 .filter(|entry| entry.is_non_normal()) |
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415 .map(|_| path.full_path()) |
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416 })) |
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417 } |
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418 |
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419 fn iter_other_parent_paths( |
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420 &mut self, |
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421 ) -> Box<dyn Iterator<Item = &HgPathBuf> + Send + '_> { |
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422 Box::new(self.iter_nodes().filter_map(|(path, node)| { |
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423 node.entry |
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424 .as_ref() |
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425 .filter(|entry| entry.is_from_other_parent()) |
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426 .map(|_| path.full_path()) |
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427 })) |
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428 } |
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429 |
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430 fn has_tracked_dir( |
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431 &mut self, |
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432 directory: &HgPath, |
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433 ) -> Result<bool, DirstateMapError> { |
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434 if let Some(node) = self.get_node(directory) { |
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435 // A node without a `DirstateEntry` was created to hold child |
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436 // nodes, and is therefore a directory. |
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437 Ok(node.entry.is_none() && node.tracked_descendants_count > 0) |
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438 } else { |
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439 Ok(false) |
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440 } |
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441 } |
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442 |
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443 fn has_dir( |
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444 &mut self, |
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445 directory: &HgPath, |
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446 ) -> Result<bool, DirstateMapError> { |
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447 if let Some(node) = self.get_node(directory) { |
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448 // A node without a `DirstateEntry` was created to hold child |
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449 // nodes, and is therefore a directory. |
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450 Ok(node.entry.is_none()) |
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451 } else { |
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452 Ok(false) |
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453 } |
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454 } |
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455 |
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456 fn parents( |
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457 &mut self, |
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458 file_contents: &[u8], |
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459 ) -> Result<&DirstateParents, DirstateError> { |
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460 if self.parents.is_none() { |
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461 let parents = if !file_contents.is_empty() { |
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462 parse_dirstate_parents(file_contents)?.clone() |
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463 } else { |
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464 DirstateParents { |
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465 p1: NULL_NODE, |
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466 p2: NULL_NODE, |
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467 } |
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468 }; |
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469 self.parents = Some(parents); |
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470 } |
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471 Ok(self.parents.as_ref().unwrap()) |
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472 } |
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473 |
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474 fn set_parents(&mut self, parents: &DirstateParents) { |
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475 self.parents = Some(parents.clone()); |
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476 self.dirty_parents = true; |
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477 } |
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478 |
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479 #[timed] |
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480 fn read<'a>( |
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481 &mut self, |
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482 file_contents: &'a [u8], |
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483 ) -> Result<Option<&'a DirstateParents>, DirstateError> { |
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484 if file_contents.is_empty() { |
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485 return Ok(None); |
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486 } |
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487 |
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488 let parents = parse_dirstate_entries( |
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489 file_contents, |
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490 |path, entry, copy_source| { |
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491 let tracked = entry.state.is_tracked(); |
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492 let node = Self::get_or_insert_node_tracing_ancestors( |
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493 &mut self.root, |
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494 path, |
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495 |ancestor| { |
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496 if tracked { |
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497 ancestor.tracked_descendants_count += 1 |
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498 } |
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499 }, |
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500 ); |
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501 assert!( |
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502 node.entry.is_none(), |
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503 "duplicate dirstate entry in read" |
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504 ); |
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505 assert!( |
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506 node.copy_source.is_none(), |
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507 "duplicate dirstate entry in read" |
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508 ); |
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509 node.entry = Some(*entry); |
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510 node.copy_source = copy_source.map(HgPath::to_owned); |
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511 self.nodes_with_entry_count += 1; |
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512 if copy_source.is_some() { |
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513 self.nodes_with_copy_source_count += 1 |
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514 } |
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515 }, |
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516 )?; |
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517 |
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518 if !self.dirty_parents { |
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519 self.set_parents(parents); |
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520 } |
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521 |
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522 Ok(Some(parents)) |
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523 } |
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524 |
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525 fn pack( |
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526 &mut self, |
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527 parents: DirstateParents, |
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528 now: Timestamp, |
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529 ) -> Result<Vec<u8>, DirstateError> { |
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530 // Optizimation (to be measured?): pre-compute size to avoid `Vec` |
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531 // reallocations |
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532 let mut size = parents.as_bytes().len(); |
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533 for (path, node) in self.iter_nodes() { |
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534 if node.entry.is_some() { |
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535 size += packed_entry_size( |
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536 path.full_path(), |
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537 node.copy_source.as_ref(), |
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538 ) |
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539 } |
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540 } |
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541 |
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542 let mut packed = Vec::with_capacity(size); |
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543 packed.extend(parents.as_bytes()); |
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544 |
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545 let now: i32 = now.0.try_into().expect("time overflow"); |
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546 for (path, opt_entry, copy_source) in self.iter_node_data_mut() { |
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547 if let Some(entry) = opt_entry { |
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548 clear_ambiguous_mtime(entry, now); |
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549 pack_entry( |
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550 path.full_path(), |
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551 entry, |
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552 copy_source.as_ref(), |
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553 &mut packed, |
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554 ); |
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555 } |
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556 } |
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557 self.dirty_parents = false; |
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558 Ok(packed) |
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559 } |
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560 |
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561 fn set_all_dirs(&mut self) -> Result<(), DirstateMapError> { |
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562 // Do nothing, this `DirstateMap` does not a separate `all_dirs` that |
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563 // needs to be recomputed |
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564 Ok(()) |
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565 } |
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566 |
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567 fn set_dirs(&mut self) -> Result<(), DirstateMapError> { |
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568 // Do nothing, this `DirstateMap` does not a separate `dirs` that needs |
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569 // to be recomputed |
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570 Ok(()) |
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571 } |
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572 |
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573 fn status<'a>( |
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574 &'a mut self, |
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575 matcher: &'a (dyn Matcher + Sync), |
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576 root_dir: PathBuf, |
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577 ignore_files: Vec<PathBuf>, |
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578 options: StatusOptions, |
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579 ) -> Result<(DirstateStatus<'a>, Vec<PatternFileWarning>), StatusError> |
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580 { |
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581 super::status::status(self, matcher, root_dir, ignore_files, options) |
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582 } |
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583 |
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584 fn copy_map_len(&self) -> usize { |
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585 self.nodes_with_copy_source_count |
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586 } |
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587 |
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588 fn copy_map_iter(&self) -> CopyMapIter<'_> { |
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589 Box::new(self.iter_nodes().filter_map(|(path, node)| { |
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590 node.copy_source |
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591 .as_ref() |
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592 .map(|copy_source| (path.full_path(), copy_source)) |
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593 })) |
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594 } |
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595 |
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596 fn copy_map_contains_key(&self, key: &HgPath) -> bool { |
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597 if let Some(node) = self.get_node(key) { |
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598 node.copy_source.is_some() |
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599 } else { |
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600 false |
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601 } |
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602 } |
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603 |
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604 fn copy_map_get(&self, key: &HgPath) -> Option<&HgPathBuf> { |
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605 self.get_node(key)?.copy_source.as_ref() |
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606 } |
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607 |
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608 fn copy_map_remove(&mut self, key: &HgPath) -> Option<HgPathBuf> { |
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609 let count = &mut self.nodes_with_copy_source_count; |
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610 Self::get_node_mut(&mut self.root, key).and_then(|node| { |
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611 if node.copy_source.is_some() { |
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612 *count -= 1 |
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613 } |
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614 node.copy_source.take() |
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615 }) |
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616 } |
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617 |
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618 fn copy_map_insert( |
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619 &mut self, |
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620 key: HgPathBuf, |
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621 value: HgPathBuf, |
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622 ) -> Option<HgPathBuf> { |
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623 let node = Self::get_or_insert_node(&mut self.root, &key); |
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624 if node.copy_source.is_none() { |
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625 self.nodes_with_copy_source_count += 1 |
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626 } |
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627 node.copy_source.replace(value) |
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628 } |
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dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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629 |
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dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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630 fn len(&self) -> usize { |
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dirstate-tree: Maintain a counter of DirstateEntry’s and copy sources
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631 self.nodes_with_entry_count |
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dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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632 } |
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dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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633 |
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dirstate-tree: Add map `get` and `contains_key` methods
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634 fn contains_key(&self, key: &HgPath) -> bool { |
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dirstate-tree: Add map `get` and `contains_key` methods
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635 self.get(key).is_some() |
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dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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636 } |
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dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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637 |
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dirstate-tree: Add map `get` and `contains_key` methods
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638 fn get(&self, key: &HgPath) -> Option<&DirstateEntry> { |
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dirstate-tree: Add map `get` and `contains_key` methods
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639 self.get_node(key)?.entry.as_ref() |
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dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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640 } |
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dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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641 |
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dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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642 fn iter(&self) -> StateMapIter<'_> { |
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dirstate-tree: Add tree traversal/iteration
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643 Box::new(self.iter_nodes().filter_map(|(path, node)| { |
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644 node.entry.as_ref().map(|entry| (path.full_path(), entry)) |
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645 })) |
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646 } |
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dirstate-tree: Empty shell for a second Rust DirstateMap implementation
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647 } |