Mercurial > hg
annotate rust/hg-core/src/dirstate_tree/dirstate_map.rs @ 47351:3b9914b28133
dirstate-v2: Add --dirs to debugdirstate command
`hg debugdirstate --dirs` also shows information stored in the dirstate
(for `read_dir` caching) about directories.
Differential Revision: https://phab.mercurial-scm.org/D10828
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Mon, 31 May 2021 19:54:41 +0200 |
parents | 7138c863d0a1 |
children | 9d58e54b5966 |
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1 use bytes_cast::BytesCast; |
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2 use micro_timer::timed; |
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3 use std::borrow::Cow; |
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4 use std::convert::TryInto; |
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5 use std::path::PathBuf; |
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6 |
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7 use super::on_disk; |
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8 use super::on_disk::DirstateV2ParseError; |
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9 use super::path_with_basename::WithBasename; |
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10 use crate::dirstate::parsers::pack_entry; |
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11 use crate::dirstate::parsers::packed_entry_size; |
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12 use crate::dirstate::parsers::parse_dirstate_entries; |
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13 use crate::dirstate::parsers::Timestamp; |
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14 use crate::matchers::Matcher; |
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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::DirstateParents; |
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20 use crate::DirstateStatus; |
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21 use crate::EntryState; |
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22 use crate::FastHashMap; |
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23 use crate::PatternFileWarning; |
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24 use crate::StateMapIter; |
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25 use crate::StatusError; |
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26 use crate::StatusOptions; |
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27 |
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28 pub struct DirstateMap<'on_disk> { |
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29 /// Contents of the `.hg/dirstate` file |
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30 pub(super) on_disk: &'on_disk [u8], |
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31 |
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32 pub(super) root: ChildNodes<'on_disk>, |
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33 |
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34 /// Number of nodes anywhere in the tree that have `.entry.is_some()`. |
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35 pub(super) nodes_with_entry_count: u32, |
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36 |
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37 /// Number of nodes anywhere in the tree that have |
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38 /// `.copy_source.is_some()`. |
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39 pub(super) nodes_with_copy_source_count: u32, |
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40 } |
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41 |
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42 /// Using a plain `HgPathBuf` of the full path from the repository root as a |
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43 /// map key would also work: all paths in a given map have the same parent |
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44 /// path, so comparing full paths gives the same result as comparing base |
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45 /// names. However `HashMap` would waste time always re-hashing the same |
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46 /// string prefix. |
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47 pub(super) type NodeKey<'on_disk> = WithBasename<Cow<'on_disk, HgPath>>; |
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48 |
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49 /// Similar to `&'tree Cow<'on_disk, HgPath>`, but can also be returned |
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50 /// for on-disk nodes that don’t actually have a `Cow` to borrow. |
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51 pub(super) enum BorrowedPath<'tree, 'on_disk> { |
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52 InMemory(&'tree HgPathBuf), |
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53 OnDisk(&'on_disk HgPath), |
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54 } |
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55 |
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56 pub(super) enum ChildNodes<'on_disk> { |
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57 InMemory(FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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58 OnDisk(&'on_disk [on_disk::Node]), |
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59 } |
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60 |
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61 pub(super) enum ChildNodesRef<'tree, 'on_disk> { |
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62 InMemory(&'tree FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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63 OnDisk(&'on_disk [on_disk::Node]), |
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64 } |
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65 |
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66 pub(super) enum NodeRef<'tree, 'on_disk> { |
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67 InMemory(&'tree NodeKey<'on_disk>, &'tree Node<'on_disk>), |
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68 OnDisk(&'on_disk on_disk::Node), |
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69 } |
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70 |
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71 impl<'tree, 'on_disk> BorrowedPath<'tree, 'on_disk> { |
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72 pub fn detach_from_tree(&self) -> Cow<'on_disk, HgPath> { |
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73 match *self { |
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74 BorrowedPath::InMemory(in_memory) => Cow::Owned(in_memory.clone()), |
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75 BorrowedPath::OnDisk(on_disk) => Cow::Borrowed(on_disk), |
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76 } |
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77 } |
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78 } |
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79 |
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80 impl<'tree, 'on_disk> std::ops::Deref for BorrowedPath<'tree, 'on_disk> { |
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81 type Target = HgPath; |
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82 |
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83 fn deref(&self) -> &HgPath { |
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84 match *self { |
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85 BorrowedPath::InMemory(in_memory) => in_memory, |
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86 BorrowedPath::OnDisk(on_disk) => on_disk, |
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87 } |
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88 } |
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89 } |
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90 |
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91 impl Default for ChildNodes<'_> { |
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92 fn default() -> Self { |
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93 ChildNodes::InMemory(Default::default()) |
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94 } |
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95 } |
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96 |
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97 impl<'on_disk> ChildNodes<'on_disk> { |
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98 pub(super) fn as_ref<'tree>( |
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99 &'tree self, |
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100 ) -> ChildNodesRef<'tree, 'on_disk> { |
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101 match self { |
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102 ChildNodes::InMemory(nodes) => ChildNodesRef::InMemory(nodes), |
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103 ChildNodes::OnDisk(nodes) => ChildNodesRef::OnDisk(nodes), |
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104 } |
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105 } |
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106 |
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107 pub(super) fn is_empty(&self) -> bool { |
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108 match self { |
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109 ChildNodes::InMemory(nodes) => nodes.is_empty(), |
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110 ChildNodes::OnDisk(nodes) => nodes.is_empty(), |
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111 } |
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112 } |
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113 |
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114 pub(super) fn make_mut( |
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115 &mut self, |
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116 on_disk: &'on_disk [u8], |
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117 ) -> Result< |
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118 &mut FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>, |
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119 DirstateV2ParseError, |
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120 > { |
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121 match self { |
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122 ChildNodes::InMemory(nodes) => Ok(nodes), |
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123 ChildNodes::OnDisk(nodes) => { |
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124 let nodes = nodes |
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125 .iter() |
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126 .map(|node| { |
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127 Ok(( |
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128 node.path(on_disk)?, |
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129 node.to_in_memory_node(on_disk)?, |
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130 )) |
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131 }) |
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132 .collect::<Result<_, _>>()?; |
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133 *self = ChildNodes::InMemory(nodes); |
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134 match self { |
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135 ChildNodes::InMemory(nodes) => Ok(nodes), |
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136 ChildNodes::OnDisk(_) => unreachable!(), |
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137 } |
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138 } |
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139 } |
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140 } |
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141 } |
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142 |
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143 impl<'tree, 'on_disk> ChildNodesRef<'tree, 'on_disk> { |
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144 pub(super) fn get( |
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145 &self, |
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146 base_name: &HgPath, |
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147 on_disk: &'on_disk [u8], |
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148 ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> { |
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149 match self { |
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150 ChildNodesRef::InMemory(nodes) => Ok(nodes |
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151 .get_key_value(base_name) |
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152 .map(|(k, v)| NodeRef::InMemory(k, v))), |
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153 ChildNodesRef::OnDisk(nodes) => { |
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154 let mut parse_result = Ok(()); |
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155 let search_result = nodes.binary_search_by(|node| { |
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156 match node.base_name(on_disk) { |
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157 Ok(node_base_name) => node_base_name.cmp(base_name), |
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158 Err(e) => { |
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159 parse_result = Err(e); |
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160 // Dummy comparison result, `search_result` won’t |
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161 // be used since `parse_result` is an error |
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162 std::cmp::Ordering::Equal |
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163 } |
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164 } |
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165 }); |
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166 parse_result.map(|()| { |
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167 search_result.ok().map(|i| NodeRef::OnDisk(&nodes[i])) |
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168 }) |
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169 } |
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170 } |
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171 } |
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172 |
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173 /// Iterate in undefined order |
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174 pub(super) fn iter( |
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175 &self, |
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176 ) -> impl Iterator<Item = NodeRef<'tree, 'on_disk>> { |
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177 match self { |
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178 ChildNodesRef::InMemory(nodes) => itertools::Either::Left( |
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179 nodes.iter().map(|(k, v)| NodeRef::InMemory(k, v)), |
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180 ), |
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181 ChildNodesRef::OnDisk(nodes) => { |
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182 itertools::Either::Right(nodes.iter().map(NodeRef::OnDisk)) |
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183 } |
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184 } |
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185 } |
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186 |
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187 /// Iterate in parallel in undefined order |
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188 pub(super) fn par_iter( |
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189 &self, |
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190 ) -> impl rayon::iter::ParallelIterator<Item = NodeRef<'tree, 'on_disk>> |
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191 { |
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192 use rayon::prelude::*; |
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193 match self { |
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194 ChildNodesRef::InMemory(nodes) => rayon::iter::Either::Left( |
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195 nodes.par_iter().map(|(k, v)| NodeRef::InMemory(k, v)), |
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196 ), |
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197 ChildNodesRef::OnDisk(nodes) => rayon::iter::Either::Right( |
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198 nodes.par_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 pub(super) fn sorted(&self) -> Vec<NodeRef<'tree, 'on_disk>> { |
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204 match self { |
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205 ChildNodesRef::InMemory(nodes) => { |
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206 let mut vec: Vec<_> = nodes |
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207 .iter() |
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208 .map(|(k, v)| NodeRef::InMemory(k, v)) |
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209 .collect(); |
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210 fn sort_key<'a>(node: &'a NodeRef) -> &'a HgPath { |
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211 match node { |
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212 NodeRef::InMemory(path, _node) => path.base_name(), |
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213 NodeRef::OnDisk(_) => unreachable!(), |
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214 } |
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215 } |
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216 // `sort_unstable_by_key` doesn’t allow keys borrowing from the |
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217 // value: https://github.com/rust-lang/rust/issues/34162 |
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218 vec.sort_unstable_by(|a, b| sort_key(a).cmp(sort_key(b))); |
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219 vec |
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220 } |
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221 ChildNodesRef::OnDisk(nodes) => { |
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222 // Nodes on disk are already sorted |
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223 nodes.iter().map(NodeRef::OnDisk).collect() |
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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 |
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229 impl<'tree, 'on_disk> NodeRef<'tree, 'on_disk> { |
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230 pub(super) fn full_path( |
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231 &self, |
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232 on_disk: &'on_disk [u8], |
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233 ) -> Result<&'tree HgPath, DirstateV2ParseError> { |
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234 match self { |
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235 NodeRef::InMemory(path, _node) => Ok(path.full_path()), |
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236 NodeRef::OnDisk(node) => node.full_path(on_disk), |
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237 } |
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238 } |
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239 |
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240 /// Returns a `BorrowedPath`, which can be turned into a `Cow<'on_disk, |
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241 /// HgPath>` detached from `'tree` |
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242 pub(super) fn full_path_borrowed( |
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243 &self, |
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244 on_disk: &'on_disk [u8], |
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245 ) -> Result<BorrowedPath<'tree, 'on_disk>, DirstateV2ParseError> { |
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246 match self { |
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247 NodeRef::InMemory(path, _node) => match path.full_path() { |
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248 Cow::Borrowed(on_disk) => Ok(BorrowedPath::OnDisk(on_disk)), |
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249 Cow::Owned(in_memory) => Ok(BorrowedPath::InMemory(in_memory)), |
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250 }, |
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251 NodeRef::OnDisk(node) => { |
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252 Ok(BorrowedPath::OnDisk(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 |
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257 pub(super) fn base_name( |
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258 &self, |
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259 on_disk: &'on_disk [u8], |
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260 ) -> Result<&'tree HgPath, DirstateV2ParseError> { |
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261 match self { |
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262 NodeRef::InMemory(path, _node) => Ok(path.base_name()), |
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263 NodeRef::OnDisk(node) => node.base_name(on_disk), |
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264 } |
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265 } |
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266 |
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267 pub(super) fn children( |
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268 &self, |
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269 on_disk: &'on_disk [u8], |
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270 ) -> Result<ChildNodesRef<'tree, 'on_disk>, DirstateV2ParseError> { |
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271 match self { |
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272 NodeRef::InMemory(_path, node) => Ok(node.children.as_ref()), |
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273 NodeRef::OnDisk(node) => { |
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274 Ok(ChildNodesRef::OnDisk(node.children(on_disk)?)) |
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275 } |
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276 } |
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277 } |
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278 |
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279 pub(super) fn has_copy_source(&self) -> bool { |
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280 match self { |
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281 NodeRef::InMemory(_path, node) => node.copy_source.is_some(), |
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282 NodeRef::OnDisk(node) => node.has_copy_source(), |
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283 } |
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284 } |
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285 |
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286 pub(super) fn copy_source( |
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287 &self, |
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288 on_disk: &'on_disk [u8], |
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289 ) -> Result<Option<&'tree HgPath>, DirstateV2ParseError> { |
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290 match self { |
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291 NodeRef::InMemory(_path, node) => { |
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292 Ok(node.copy_source.as_ref().map(|s| &**s)) |
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293 } |
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294 NodeRef::OnDisk(node) => node.copy_source(on_disk), |
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295 } |
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296 } |
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297 |
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298 pub(super) fn entry( |
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299 &self, |
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300 ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
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301 match self { |
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302 NodeRef::InMemory(_path, node) => { |
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303 Ok(node.data.as_entry().copied()) |
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304 } |
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305 NodeRef::OnDisk(node) => node.entry(), |
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306 } |
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307 } |
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308 |
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309 pub(super) fn state( |
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310 &self, |
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311 ) -> Result<Option<EntryState>, DirstateV2ParseError> { |
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312 match self { |
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313 NodeRef::InMemory(_path, node) => { |
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314 Ok(node.data.as_entry().map(|entry| entry.state)) |
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315 } |
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316 NodeRef::OnDisk(node) => node.state(), |
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317 } |
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318 } |
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319 |
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320 pub(super) fn cached_directory_mtime( |
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321 &self, |
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322 ) -> Option<&'tree on_disk::Timestamp> { |
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323 match self { |
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324 NodeRef::InMemory(_path, node) => match &node.data { |
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325 NodeData::CachedDirectory { mtime } => Some(mtime), |
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326 _ => None, |
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327 }, |
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328 NodeRef::OnDisk(node) => node.cached_directory_mtime(), |
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329 } |
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330 } |
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331 |
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332 pub(super) fn tracked_descendants_count(&self) -> u32 { |
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333 match self { |
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334 NodeRef::InMemory(_path, node) => node.tracked_descendants_count, |
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335 NodeRef::OnDisk(node) => node.tracked_descendants_count.get(), |
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336 } |
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337 } |
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338 } |
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339 |
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340 /// Represents a file or a directory |
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341 #[derive(Default)] |
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342 pub(super) struct Node<'on_disk> { |
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343 pub(super) data: NodeData, |
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344 |
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345 pub(super) copy_source: Option<Cow<'on_disk, HgPath>>, |
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346 |
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347 pub(super) children: ChildNodes<'on_disk>, |
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348 |
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349 /// How many (non-inclusive) descendants of this node are tracked files |
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350 pub(super) tracked_descendants_count: u32, |
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351 } |
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352 |
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353 pub(super) enum NodeData { |
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354 Entry(DirstateEntry), |
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355 CachedDirectory { mtime: on_disk::Timestamp }, |
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356 None, |
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357 } |
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358 |
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359 impl Default for NodeData { |
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360 fn default() -> Self { |
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361 NodeData::None |
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362 } |
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363 } |
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364 |
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365 impl NodeData { |
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366 fn has_entry(&self) -> bool { |
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367 match self { |
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368 NodeData::Entry(_) => true, |
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369 _ => false, |
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370 } |
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371 } |
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372 |
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373 fn as_entry(&self) -> Option<&DirstateEntry> { |
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374 match self { |
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375 NodeData::Entry(entry) => Some(entry), |
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376 _ => None, |
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377 } |
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378 } |
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379 } |
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380 |
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381 impl<'on_disk> DirstateMap<'on_disk> { |
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382 pub(super) fn empty(on_disk: &'on_disk [u8]) -> Self { |
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383 Self { |
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384 on_disk, |
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385 root: ChildNodes::default(), |
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386 nodes_with_entry_count: 0, |
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387 nodes_with_copy_source_count: 0, |
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388 } |
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389 } |
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390 |
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391 #[timed] |
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392 pub fn new_v2( |
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393 on_disk: &'on_disk [u8], |
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394 ) -> Result<(Self, Option<DirstateParents>), DirstateError> { |
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395 Ok(on_disk::read(on_disk)?) |
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396 } |
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397 |
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398 #[timed] |
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399 pub fn new_v1( |
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400 on_disk: &'on_disk [u8], |
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401 ) -> Result<(Self, Option<DirstateParents>), DirstateError> { |
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402 let mut map = Self::empty(on_disk); |
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403 if map.on_disk.is_empty() { |
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404 return Ok((map, None)); |
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405 } |
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406 |
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407 let parents = parse_dirstate_entries( |
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408 map.on_disk, |
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409 |path, entry, copy_source| { |
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410 let tracked = entry.state.is_tracked(); |
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411 let node = Self::get_or_insert_node( |
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412 map.on_disk, |
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413 &mut map.root, |
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414 path, |
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415 WithBasename::to_cow_borrowed, |
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416 |ancestor| { |
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417 if tracked { |
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418 ancestor.tracked_descendants_count += 1 |
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419 } |
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420 }, |
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421 )?; |
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422 assert!( |
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423 !node.data.has_entry(), |
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424 "duplicate dirstate entry in read" |
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425 ); |
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426 assert!( |
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427 node.copy_source.is_none(), |
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428 "duplicate dirstate entry in read" |
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429 ); |
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430 node.data = NodeData::Entry(*entry); |
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431 node.copy_source = copy_source.map(Cow::Borrowed); |
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432 map.nodes_with_entry_count += 1; |
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433 if copy_source.is_some() { |
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434 map.nodes_with_copy_source_count += 1 |
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435 } |
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436 Ok(()) |
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437 }, |
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438 )?; |
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439 let parents = Some(parents.clone()); |
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440 |
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441 Ok((map, parents)) |
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442 } |
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443 |
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444 fn get_node<'tree>( |
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445 &'tree self, |
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446 path: &HgPath, |
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447 ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> { |
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448 let mut children = self.root.as_ref(); |
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449 let mut components = path.components(); |
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450 let mut component = |
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451 components.next().expect("expected at least one components"); |
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452 loop { |
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453 if let Some(child) = children.get(component, self.on_disk)? { |
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454 if let Some(next_component) = components.next() { |
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455 component = next_component; |
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456 children = child.children(self.on_disk)?; |
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457 } else { |
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458 return Ok(Some(child)); |
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459 } |
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460 } else { |
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461 return Ok(None); |
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462 } |
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463 } |
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464 } |
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465 |
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466 /// Returns a mutable reference to the node at `path` if it exists |
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467 /// |
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468 /// This takes `root` instead of `&mut self` so that callers can mutate |
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469 /// other fields while the returned borrow is still valid |
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470 fn get_node_mut<'tree>( |
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471 on_disk: &'on_disk [u8], |
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472 root: &'tree mut ChildNodes<'on_disk>, |
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473 path: &HgPath, |
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474 ) -> Result<Option<&'tree mut Node<'on_disk>>, DirstateV2ParseError> { |
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475 let mut children = root; |
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476 let mut components = path.components(); |
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477 let mut component = |
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478 components.next().expect("expected at least one components"); |
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479 loop { |
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480 if let Some(child) = children.make_mut(on_disk)?.get_mut(component) |
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481 { |
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482 if let Some(next_component) = components.next() { |
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483 component = next_component; |
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484 children = &mut child.children; |
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485 } else { |
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486 return Ok(Some(child)); |
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487 } |
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488 } else { |
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489 return Ok(None); |
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490 } |
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491 } |
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492 } |
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493 |
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494 pub(super) fn get_or_insert_node<'tree, 'path>( |
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495 on_disk: &'on_disk [u8], |
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496 root: &'tree mut ChildNodes<'on_disk>, |
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497 path: &'path HgPath, |
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498 to_cow: impl Fn( |
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499 WithBasename<&'path HgPath>, |
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500 ) -> WithBasename<Cow<'on_disk, HgPath>>, |
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501 mut each_ancestor: impl FnMut(&mut Node), |
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502 ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> { |
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503 let mut child_nodes = root; |
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504 let mut inclusive_ancestor_paths = |
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505 WithBasename::inclusive_ancestors_of(path); |
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506 let mut ancestor_path = inclusive_ancestor_paths |
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507 .next() |
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508 .expect("expected at least one inclusive ancestor"); |
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509 loop { |
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510 // TODO: can we avoid allocating an owned key in cases where the |
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511 // map already contains that key, without introducing double |
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512 // lookup? |
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513 let child_node = child_nodes |
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514 .make_mut(on_disk)? |
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515 .entry(to_cow(ancestor_path)) |
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516 .or_default(); |
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517 if let Some(next) = inclusive_ancestor_paths.next() { |
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518 each_ancestor(child_node); |
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519 ancestor_path = next; |
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520 child_nodes = &mut child_node.children; |
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521 } else { |
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522 return Ok(child_node); |
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523 } |
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524 } |
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525 } |
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526 |
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527 fn add_or_remove_file( |
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528 &mut self, |
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529 path: &HgPath, |
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530 old_state: EntryState, |
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531 new_entry: DirstateEntry, |
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532 ) -> Result<(), DirstateV2ParseError> { |
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533 let tracked_count_increment = |
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534 match (old_state.is_tracked(), new_entry.state.is_tracked()) { |
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535 (false, true) => 1, |
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536 (true, false) => -1, |
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537 _ => 0, |
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538 }; |
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539 |
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540 let node = Self::get_or_insert_node( |
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541 self.on_disk, |
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542 &mut self.root, |
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543 path, |
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544 WithBasename::to_cow_owned, |
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545 |ancestor| { |
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546 // We can’t use `+= increment` because the counter is unsigned, |
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547 // and we want debug builds to detect accidental underflow |
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548 // through zero |
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549 match tracked_count_increment { |
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550 1 => ancestor.tracked_descendants_count += 1, |
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551 -1 => ancestor.tracked_descendants_count -= 1, |
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552 _ => {} |
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553 } |
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554 }, |
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555 )?; |
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556 if !node.data.has_entry() { |
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557 self.nodes_with_entry_count += 1 |
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558 } |
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559 node.data = NodeData::Entry(new_entry); |
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560 Ok(()) |
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561 } |
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562 |
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563 fn iter_nodes<'tree>( |
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564 &'tree self, |
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565 ) -> impl Iterator< |
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566 Item = Result<NodeRef<'tree, 'on_disk>, DirstateV2ParseError>, |
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567 > + 'tree { |
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568 // Depth first tree traversal. |
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569 // |
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570 // If we could afford internal iteration and recursion, |
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571 // this would look like: |
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572 // |
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573 // ``` |
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574 // fn traverse_children( |
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575 // children: &ChildNodes, |
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576 // each: &mut impl FnMut(&Node), |
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577 // ) { |
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578 // for child in children.values() { |
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579 // traverse_children(&child.children, each); |
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580 // each(child); |
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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 // However we want an external iterator and therefore can’t use the |
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586 // call stack. Use an explicit stack instead: |
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587 let mut stack = Vec::new(); |
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588 let mut iter = self.root.as_ref().iter(); |
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589 std::iter::from_fn(move || { |
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590 while let Some(child_node) = iter.next() { |
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591 let children = match child_node.children(self.on_disk) { |
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592 Ok(children) => children, |
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593 Err(error) => return Some(Err(error)), |
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594 }; |
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595 // Pseudo-recursion |
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596 let new_iter = children.iter(); |
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597 let old_iter = std::mem::replace(&mut iter, new_iter); |
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598 stack.push((child_node, old_iter)); |
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599 } |
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600 // Found the end of a `children.iter()` iterator. |
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601 if let Some((child_node, next_iter)) = stack.pop() { |
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602 // "Return" from pseudo-recursion by restoring state from the |
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603 // explicit stack |
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604 iter = next_iter; |
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605 |
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606 Some(Ok(child_node)) |
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607 } else { |
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608 // Reached the bottom of the stack, we’re done |
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609 None |
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610 } |
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611 }) |
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612 } |
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613 |
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614 fn clear_known_ambiguous_mtimes( |
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615 &mut self, |
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616 paths: &[impl AsRef<HgPath>], |
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617 ) -> Result<(), DirstateV2ParseError> { |
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618 for path in paths { |
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619 if let Some(node) = Self::get_node_mut( |
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620 self.on_disk, |
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621 &mut self.root, |
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622 path.as_ref(), |
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623 )? { |
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624 if let NodeData::Entry(entry) = &mut node.data { |
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625 entry.clear_mtime(); |
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626 } |
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627 } |
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628 } |
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629 Ok(()) |
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630 } |
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631 |
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632 /// Return a faillilble iterator of full paths of nodes that have an |
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633 /// `entry` for which the given `predicate` returns true. |
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634 /// |
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635 /// Fallibility means that each iterator item is a `Result`, which may |
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636 /// indicate a parse error of the on-disk dirstate-v2 format. Such errors |
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637 /// should only happen if Mercurial is buggy or a repository is corrupted. |
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638 fn filter_full_paths<'tree>( |
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639 &'tree self, |
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640 predicate: impl Fn(&DirstateEntry) -> bool + 'tree, |
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641 ) -> impl Iterator<Item = Result<&HgPath, DirstateV2ParseError>> + 'tree |
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642 { |
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643 filter_map_results(self.iter_nodes(), move |node| { |
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644 if let Some(entry) = node.entry()? { |
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645 if predicate(&entry) { |
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646 return Ok(Some(node.full_path(self.on_disk)?)); |
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647 } |
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648 } |
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649 Ok(None) |
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650 }) |
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651 } |
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652 } |
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653 |
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654 /// Like `Iterator::filter_map`, but over a fallible iterator of `Result`s. |
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655 /// |
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656 /// The callback is only called for incoming `Ok` values. Errors are passed |
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657 /// through as-is. In order to let it use the `?` operator the callback is |
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658 /// expected to return a `Result` of `Option`, instead of an `Option` of |
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659 /// `Result`. |
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660 fn filter_map_results<'a, I, F, A, B, E>( |
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661 iter: I, |
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662 f: F, |
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663 ) -> impl Iterator<Item = Result<B, E>> + 'a |
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664 where |
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665 I: Iterator<Item = Result<A, E>> + 'a, |
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666 F: Fn(A) -> Result<Option<B>, E> + 'a, |
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667 { |
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668 iter.filter_map(move |result| match result { |
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669 Ok(node) => f(node).transpose(), |
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670 Err(e) => Some(Err(e)), |
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671 }) |
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672 } |
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673 |
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674 impl<'on_disk> super::dispatch::DirstateMapMethods for DirstateMap<'on_disk> { |
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675 fn clear(&mut self) { |
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676 self.root = Default::default(); |
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677 self.nodes_with_entry_count = 0; |
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678 self.nodes_with_copy_source_count = 0; |
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679 } |
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680 |
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681 fn add_file( |
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682 &mut self, |
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683 filename: &HgPath, |
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684 old_state: EntryState, |
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685 entry: DirstateEntry, |
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686 ) -> Result<(), DirstateError> { |
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687 Ok(self.add_or_remove_file(filename, old_state, entry)?) |
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688 } |
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689 |
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690 fn remove_file( |
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691 &mut self, |
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692 filename: &HgPath, |
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693 old_state: EntryState, |
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694 size: i32, |
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695 ) -> Result<(), DirstateError> { |
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696 let entry = DirstateEntry { |
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697 state: EntryState::Removed, |
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698 mode: 0, |
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699 size, |
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700 mtime: 0, |
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701 }; |
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702 Ok(self.add_or_remove_file(filename, old_state, entry)?) |
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703 } |
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704 |
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705 fn drop_file( |
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706 &mut self, |
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707 filename: &HgPath, |
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708 old_state: EntryState, |
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709 ) -> Result<bool, DirstateError> { |
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710 struct Dropped { |
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711 was_tracked: bool, |
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712 had_entry: bool, |
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713 had_copy_source: bool, |
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714 } |
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715 fn recur<'on_disk>( |
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716 on_disk: &'on_disk [u8], |
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717 nodes: &mut ChildNodes<'on_disk>, |
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718 path: &HgPath, |
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719 ) -> Result<Option<Dropped>, DirstateV2ParseError> { |
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720 let (first_path_component, rest_of_path) = |
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721 path.split_first_component(); |
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722 let node = if let Some(node) = |
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723 nodes.make_mut(on_disk)?.get_mut(first_path_component) |
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724 { |
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725 node |
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726 } else { |
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727 return Ok(None); |
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728 }; |
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729 let dropped; |
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730 if let Some(rest) = rest_of_path { |
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731 if let Some(d) = recur(on_disk, &mut node.children, rest)? { |
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732 dropped = d; |
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733 if dropped.was_tracked { |
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734 node.tracked_descendants_count -= 1; |
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735 } |
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736 } else { |
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737 return Ok(None); |
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738 } |
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739 } else { |
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740 let had_entry = node.data.has_entry(); |
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741 if had_entry { |
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742 node.data = NodeData::None |
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743 } |
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744 dropped = Dropped { |
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745 was_tracked: node |
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746 .data |
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747 .as_entry() |
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748 .map_or(false, |entry| entry.state.is_tracked()), |
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749 had_entry, |
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750 had_copy_source: node.copy_source.take().is_some(), |
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751 }; |
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752 } |
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753 // After recursion, for both leaf (rest_of_path is None) nodes and |
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754 // parent nodes, remove a node if it just became empty. |
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755 if !node.data.has_entry() |
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756 && node.copy_source.is_none() |
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757 && node.children.is_empty() |
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758 { |
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759 nodes.make_mut(on_disk)?.remove(first_path_component); |
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760 } |
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761 Ok(Some(dropped)) |
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762 } |
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763 |
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764 if let Some(dropped) = recur(self.on_disk, &mut self.root, filename)? { |
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765 if dropped.had_entry { |
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766 self.nodes_with_entry_count -= 1 |
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767 } |
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768 if dropped.had_copy_source { |
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769 self.nodes_with_copy_source_count -= 1 |
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770 } |
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771 Ok(dropped.had_entry) |
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772 } else { |
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773 debug_assert!(!old_state.is_tracked()); |
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774 Ok(false) |
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775 } |
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776 } |
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777 |
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778 fn clear_ambiguous_times( |
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779 &mut self, |
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780 filenames: Vec<HgPathBuf>, |
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781 now: i32, |
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782 ) -> Result<(), DirstateV2ParseError> { |
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783 for filename in filenames { |
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784 if let Some(node) = |
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785 Self::get_node_mut(self.on_disk, &mut self.root, &filename)? |
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786 { |
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787 if let NodeData::Entry(entry) = &mut node.data { |
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788 entry.clear_ambiguous_mtime(now); |
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789 } |
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790 } |
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791 } |
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792 Ok(()) |
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793 } |
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794 |
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795 fn non_normal_entries_contains( |
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796 &mut self, |
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797 key: &HgPath, |
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798 ) -> Result<bool, DirstateV2ParseError> { |
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799 Ok(if let Some(node) = self.get_node(key)? { |
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800 node.entry()?.map_or(false, |entry| entry.is_non_normal()) |
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801 } else { |
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802 false |
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803 }) |
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804 } |
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805 |
47108
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806 fn non_normal_entries_remove(&mut self, _key: &HgPath) { |
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807 // Do nothing, this `DirstateMap` does not have a separate "non normal |
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808 // entries" set that need to be kept up to date |
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809 } |
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810 |
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811 fn non_normal_or_other_parent_paths( |
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812 &mut self, |
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813 ) -> Box<dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> + '_> |
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814 { |
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815 Box::new(self.filter_full_paths(|entry| { |
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816 entry.is_non_normal() || entry.is_from_other_parent() |
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817 })) |
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818 } |
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819 |
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820 fn set_non_normal_other_parent_entries(&mut self, _force: bool) { |
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821 // Do nothing, this `DirstateMap` does not have a separate "non normal |
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822 // entries" and "from other parent" sets that need to be recomputed |
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823 } |
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824 |
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825 fn iter_non_normal_paths( |
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826 &mut self, |
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827 ) -> Box< |
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828 dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> + Send + '_, |
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829 > { |
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830 self.iter_non_normal_paths_panic() |
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831 } |
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832 |
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833 fn iter_non_normal_paths_panic( |
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834 &self, |
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835 ) -> Box< |
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836 dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> + Send + '_, |
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837 > { |
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838 Box::new(self.filter_full_paths(|entry| entry.is_non_normal())) |
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839 } |
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840 |
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841 fn iter_other_parent_paths( |
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842 &mut self, |
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843 ) -> Box< |
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844 dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> + Send + '_, |
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845 > { |
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846 Box::new(self.filter_full_paths(|entry| entry.is_from_other_parent())) |
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847 } |
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848 |
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849 fn has_tracked_dir( |
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850 &mut self, |
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851 directory: &HgPath, |
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852 ) -> Result<bool, DirstateError> { |
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853 if let Some(node) = self.get_node(directory)? { |
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854 // A node without a `DirstateEntry` was created to hold child |
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855 // nodes, and is therefore a directory. |
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856 let state = node.state()?; |
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857 Ok(state.is_none() && node.tracked_descendants_count() > 0) |
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858 } else { |
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859 Ok(false) |
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860 } |
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861 } |
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862 |
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863 fn has_dir(&mut self, directory: &HgPath) -> Result<bool, DirstateError> { |
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864 if let Some(node) = self.get_node(directory)? { |
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865 // A node without a `DirstateEntry` was created to hold child |
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866 // nodes, and is therefore a directory. |
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867 Ok(node.state()?.is_none()) |
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868 } else { |
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869 Ok(false) |
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870 } |
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871 } |
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872 |
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873 #[timed] |
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874 fn pack_v1( |
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875 &mut self, |
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876 parents: DirstateParents, |
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877 now: Timestamp, |
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878 ) -> Result<Vec<u8>, DirstateError> { |
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879 let now: i32 = now.0.try_into().expect("time overflow"); |
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880 let mut ambiguous_mtimes = Vec::new(); |
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881 // Optizimation (to be measured?): pre-compute size to avoid `Vec` |
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882 // reallocations |
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883 let mut size = parents.as_bytes().len(); |
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884 for node in self.iter_nodes() { |
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885 let node = node?; |
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886 if let Some(entry) = node.entry()? { |
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887 size += packed_entry_size( |
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888 node.full_path(self.on_disk)?, |
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889 node.copy_source(self.on_disk)?, |
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890 ); |
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891 if entry.mtime_is_ambiguous(now) { |
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892 ambiguous_mtimes.push( |
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893 node.full_path_borrowed(self.on_disk)? |
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894 .detach_from_tree(), |
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895 ) |
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896 } |
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897 } |
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898 } |
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899 self.clear_known_ambiguous_mtimes(&ambiguous_mtimes)?; |
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900 |
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901 let mut packed = Vec::with_capacity(size); |
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902 packed.extend(parents.as_bytes()); |
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903 |
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904 for node in self.iter_nodes() { |
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905 let node = node?; |
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906 if let Some(entry) = node.entry()? { |
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907 pack_entry( |
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908 node.full_path(self.on_disk)?, |
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909 &entry, |
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910 node.copy_source(self.on_disk)?, |
47102
d6c94ca40863
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Simon Sapin <simon.sapin@octobus.net>
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47101
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|
911 &mut packed, |
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|
912 ); |
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|
913 } |
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|
914 } |
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|
915 Ok(packed) |
47095
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|
916 } |
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|
917 |
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|
918 #[timed] |
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|
919 fn pack_v2( |
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|
920 &mut self, |
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|
921 parents: DirstateParents, |
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|
922 now: Timestamp, |
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|
923 ) -> Result<Vec<u8>, DirstateError> { |
47330
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|
924 // TODO: how do we want to handle this in 2038? |
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|
925 let now: i32 = now.0.try_into().expect("time overflow"); |
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|
926 let mut paths = Vec::new(); |
47333
69530e5d4fe5
dirstate-tree: Add `NodeRef` and `ChildNodesRef` enums
Simon Sapin <simon.sapin@octobus.net>
parents:
47332
diff
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|
927 for node in self.iter_nodes() { |
47335
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|
928 let node = node?; |
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|
929 if let Some(entry) = node.entry()? { |
47330
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|
930 if entry.mtime_is_ambiguous(now) { |
47347
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|
931 paths.push( |
73ddcedeaadf
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|
932 node.full_path_borrowed(self.on_disk)? |
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|
933 .detach_from_tree(), |
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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 // Borrow of `self` ends here since we collect cloned paths |
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|
939 |
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|
940 self.clear_known_ambiguous_mtimes(&paths)?; |
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|
941 |
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|
942 on_disk::write(self, parents) |
47280
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|
943 } |
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|
944 |
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|
945 fn set_all_dirs(&mut self) -> Result<(), DirstateError> { |
47106
52906934b775
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Simon Sapin <simon.sapin@octobus.net>
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|
946 // Do nothing, this `DirstateMap` does not a separate `all_dirs` that |
52906934b775
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|
947 // needs to be recomputed |
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|
948 Ok(()) |
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|
949 } |
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|
950 |
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|
951 fn set_dirs(&mut self) -> Result<(), DirstateError> { |
47106
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|
952 // Do nothing, this `DirstateMap` does not a separate `dirs` that needs |
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|
953 // to be recomputed |
52906934b775
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|
954 Ok(()) |
47095
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|
955 } |
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|
956 |
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|
957 fn status<'a>( |
47112
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|
958 &'a mut self, |
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|
959 matcher: &'a (dyn Matcher + Sync), |
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960 root_dir: PathBuf, |
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47110
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|
961 ignore_files: Vec<PathBuf>, |
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diff
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|
962 options: StatusOptions, |
47110
9c6b458a08e1
rust: Move "lookup" a.k.a. "unsure" paths into `DirstateStatus` struct
Simon Sapin <simon.sapin@octobus.net>
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47109
diff
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|
963 ) -> Result<(DirstateStatus<'a>, Vec<PatternFileWarning>), StatusError> |
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|
964 { |
47112
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|
965 super::status::status(self, matcher, root_dir, ignore_files, options) |
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|
966 } |
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|
967 |
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|
968 fn copy_map_len(&self) -> usize { |
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|
969 self.nodes_with_copy_source_count as usize |
47095
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|
970 } |
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|
971 |
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|
972 fn copy_map_iter(&self) -> CopyMapIter<'_> { |
47336
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|
973 Box::new(filter_map_results(self.iter_nodes(), move |node| { |
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|
974 Ok(if let Some(source) = node.copy_source(self.on_disk)? { |
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|
975 Some((node.full_path(self.on_disk)?, source)) |
47335
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|
976 } else { |
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|
977 None |
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|
978 }) |
47100
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|
979 })) |
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|
980 } |
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|
981 |
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|
982 fn copy_map_contains_key( |
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983 &self, |
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|
984 key: &HgPath, |
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985 ) -> Result<bool, DirstateV2ParseError> { |
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986 Ok(if let Some(node) = self.get_node(key)? { |
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|
987 node.has_copy_source() |
47099
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|
988 } else { |
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|
989 false |
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|
990 }) |
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|
991 } |
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992 |
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|
993 fn copy_map_get( |
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994 &self, |
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|
995 key: &HgPath, |
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996 ) -> Result<Option<&HgPath>, DirstateV2ParseError> { |
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|
997 if let Some(node) = self.get_node(key)? { |
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|
998 if let Some(source) = node.copy_source(self.on_disk)? { |
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|
999 return Ok(Some(source)); |
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|
1000 } |
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1001 } |
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|
1002 Ok(None) |
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1003 } |
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1004 |
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|
1005 fn copy_map_remove( |
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1006 &mut self, |
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1007 key: &HgPath, |
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|
1008 ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
47104
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|
1009 let count = &mut self.nodes_with_copy_source_count; |
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1010 Ok( |
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|
1011 Self::get_node_mut(self.on_disk, &mut self.root, key)?.and_then( |
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|
1012 |node| { |
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|
1013 if node.copy_source.is_some() { |
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1014 *count -= 1 |
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1015 } |
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1016 node.copy_source.take().map(Cow::into_owned) |
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1017 }, |
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1018 ), |
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1019 ) |
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1020 } |
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1021 |
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1022 fn copy_map_insert( |
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1023 &mut self, |
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1024 key: HgPathBuf, |
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1025 value: HgPathBuf, |
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1026 ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
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1027 let node = Self::get_or_insert_node( |
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1028 self.on_disk, |
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1029 &mut self.root, |
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1030 &key, |
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1031 WithBasename::to_cow_owned, |
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1032 |_ancestor| {}, |
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1033 )?; |
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1034 if node.copy_source.is_none() { |
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1035 self.nodes_with_copy_source_count += 1 |
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1036 } |
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1037 Ok(node.copy_source.replace(value.into()).map(Cow::into_owned)) |
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1038 } |
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1039 |
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1040 fn len(&self) -> usize { |
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1041 self.nodes_with_entry_count as usize |
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1042 } |
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1043 |
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1044 fn contains_key( |
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1045 &self, |
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1046 key: &HgPath, |
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1047 ) -> Result<bool, DirstateV2ParseError> { |
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1048 Ok(self.get(key)?.is_some()) |
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1049 } |
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1050 |
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1051 fn get( |
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1052 &self, |
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1053 key: &HgPath, |
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1054 ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
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1055 Ok(if let Some(node) = self.get_node(key)? { |
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1056 node.entry()? |
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1057 } else { |
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1058 None |
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1059 }) |
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1060 } |
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1061 |
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1062 fn iter(&self) -> StateMapIter<'_> { |
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1063 Box::new(filter_map_results(self.iter_nodes(), move |node| { |
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1064 Ok(if let Some(entry) = node.entry()? { |
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1065 Some((node.full_path(self.on_disk)?, entry)) |
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1066 } else { |
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1067 None |
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1068 }) |
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1069 })) |
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1070 } |
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1071 |
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1072 fn iter_directories( |
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1073 &self, |
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1074 ) -> Box< |
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1075 dyn Iterator< |
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1076 Item = Result< |
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1077 (&HgPath, Option<Timestamp>), |
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1078 DirstateV2ParseError, |
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1079 >, |
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1080 > + Send |
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1081 + '_, |
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1082 > { |
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1083 Box::new(filter_map_results(self.iter_nodes(), move |node| { |
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1084 Ok(if node.state()?.is_none() { |
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1085 Some(( |
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1086 node.full_path(self.on_disk)?, |
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1087 node.cached_directory_mtime() |
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1088 .map(|mtime| Timestamp(mtime.seconds())), |
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1089 )) |
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1090 } else { |
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1091 None |
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1092 }) |
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1093 })) |
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1094 } |
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1095 } |