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2 | 2 | name = "hg-core" |
|
3 | 3 | version = "0.1.0" |
|
4 | 4 | authors = ["Georges Racinet <gracinet@anybox.fr>"] |
|
5 | 5 | description = "Mercurial pure Rust core library, with no assumption on Python bindings (FFI)" |
|
6 | 6 | edition = "2018" |
|
7 | 7 | |
|
8 | 8 | [lib] |
|
9 | 9 | name = "hg" |
|
10 | 10 | |
|
11 | 11 | [dependencies] |
|
12 | 12 | bitflags = "1.2" |
|
13 | 13 | bytes-cast = "0.2" |
|
14 | 14 | byteorder = "1.3.4" |
|
15 | 15 | derive_more = "0.99" |
|
16 | hashbrown = {version = "0.9.1", features = ["rayon"]} | |
|
16 | 17 | home = "0.5" |
|
17 | 18 | im-rc = "15.0.*" |
|
18 | 19 | itertools = "0.9" |
|
19 | 20 | lazy_static = "1.4.0" |
|
20 | 21 | libc = "0.2" |
|
21 | 22 | rand = "0.8.4" |
|
22 | 23 | rand_pcg = "0.3.1" |
|
23 | 24 | rand_distr = "0.4.2" |
|
24 | 25 | rayon = "1.3.0" |
|
25 | 26 | regex = "1.3.9" |
|
26 | 27 | sha-1 = "0.9.6" |
|
27 | 28 | twox-hash = "1.5.0" |
|
28 | 29 | same-file = "1.0.6" |
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29 | 30 | stable_deref_trait = "1.2.0" |
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30 | 31 | tempfile = "3.1.0" |
|
31 | 32 | crossbeam-channel = "0.4" |
|
32 | 33 | micro-timer = "0.3.0" |
|
33 | 34 | log = "0.4.8" |
|
34 | 35 | memmap2 = {version = "0.4", features = ["stable_deref_trait"]} |
|
35 | 36 | zstd = "0.5.3" |
|
36 | 37 | format-bytes = "0.3.0" |
|
37 | 38 | |
|
38 | 39 | # We don't use the `miniz-oxide` backend to not change rhg benchmarks and until |
|
39 | 40 | # we have a clearer view of which backend is the fastest. |
|
40 | 41 | [dependencies.flate2] |
|
41 | 42 | version = "1.0.16" |
|
42 | 43 | features = ["zlib"] |
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43 | 44 | default-features = false |
|
44 | 45 | |
|
45 | 46 | [dev-dependencies] |
|
46 | 47 | clap = "*" |
|
47 | 48 | pretty_assertions = "0.6.1" |
@@ -1,1158 +1,1156 b'' | |||
|
1 | 1 | use bytes_cast::BytesCast; |
|
2 | 2 | use micro_timer::timed; |
|
3 | 3 | use std::borrow::Cow; |
|
4 | 4 | use std::path::PathBuf; |
|
5 | 5 | |
|
6 | 6 | use super::on_disk; |
|
7 | 7 | use super::on_disk::DirstateV2ParseError; |
|
8 | 8 | use super::owning::OwningDirstateMap; |
|
9 | 9 | use super::path_with_basename::WithBasename; |
|
10 | 10 | use crate::dirstate::parsers::pack_entry; |
|
11 | 11 | use crate::dirstate::parsers::packed_entry_size; |
|
12 | 12 | use crate::dirstate::parsers::parse_dirstate_entries; |
|
13 | 13 | use crate::dirstate::CopyMapIter; |
|
14 | 14 | use crate::dirstate::StateMapIter; |
|
15 | 15 | use crate::dirstate::TruncatedTimestamp; |
|
16 | 16 | use crate::dirstate::SIZE_FROM_OTHER_PARENT; |
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17 | 17 | use crate::dirstate::SIZE_NON_NORMAL; |
|
18 | 18 | use crate::matchers::Matcher; |
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19 | 19 | use crate::utils::hg_path::{HgPath, HgPathBuf}; |
|
20 | 20 | use crate::DirstateEntry; |
|
21 | 21 | use crate::DirstateError; |
|
22 | 22 | use crate::DirstateParents; |
|
23 | 23 | use crate::DirstateStatus; |
|
24 | 24 | use crate::EntryState; |
|
25 | use crate::FastHashMap; | |
|
25 | use crate::FastHashbrownMap as FastHashMap; | |
|
26 | 26 | use crate::PatternFileWarning; |
|
27 | 27 | use crate::StatusError; |
|
28 | 28 | use crate::StatusOptions; |
|
29 | 29 | |
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30 | 30 | /// Append to an existing data file if the amount of unreachable data (not used |
|
31 | 31 | /// anymore) is less than this fraction of the total amount of existing data. |
|
32 | 32 | const ACCEPTABLE_UNREACHABLE_BYTES_RATIO: f32 = 0.5; |
|
33 | 33 | |
|
34 | 34 | pub struct DirstateMap<'on_disk> { |
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35 | 35 | /// Contents of the `.hg/dirstate` file |
|
36 | 36 | pub(super) on_disk: &'on_disk [u8], |
|
37 | 37 | |
|
38 | 38 | pub(super) root: ChildNodes<'on_disk>, |
|
39 | 39 | |
|
40 | 40 | /// Number of nodes anywhere in the tree that have `.entry.is_some()`. |
|
41 | 41 | pub(super) nodes_with_entry_count: u32, |
|
42 | 42 | |
|
43 | 43 | /// Number of nodes anywhere in the tree that have |
|
44 | 44 | /// `.copy_source.is_some()`. |
|
45 | 45 | pub(super) nodes_with_copy_source_count: u32, |
|
46 | 46 | |
|
47 | 47 | /// See on_disk::Header |
|
48 | 48 | pub(super) ignore_patterns_hash: on_disk::IgnorePatternsHash, |
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49 | 49 | |
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50 | 50 | /// How many bytes of `on_disk` are not used anymore |
|
51 | 51 | pub(super) unreachable_bytes: u32, |
|
52 | 52 | } |
|
53 | 53 | |
|
54 | 54 | /// Using a plain `HgPathBuf` of the full path from the repository root as a |
|
55 | 55 | /// map key would also work: all paths in a given map have the same parent |
|
56 | 56 | /// path, so comparing full paths gives the same result as comparing base |
|
57 | 57 | /// names. However `HashMap` would waste time always re-hashing the same |
|
58 | 58 | /// string prefix. |
|
59 | 59 | pub(super) type NodeKey<'on_disk> = WithBasename<Cow<'on_disk, HgPath>>; |
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60 | 60 | |
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61 | 61 | /// Similar to `&'tree Cow<'on_disk, HgPath>`, but can also be returned |
|
62 | 62 | /// for on-disk nodes that don’t actually have a `Cow` to borrow. |
|
63 | 63 | pub(super) enum BorrowedPath<'tree, 'on_disk> { |
|
64 | 64 | InMemory(&'tree HgPathBuf), |
|
65 | 65 | OnDisk(&'on_disk HgPath), |
|
66 | 66 | } |
|
67 | 67 | |
|
68 | 68 | pub(super) enum ChildNodes<'on_disk> { |
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69 | 69 | InMemory(FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
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70 | 70 | OnDisk(&'on_disk [on_disk::Node]), |
|
71 | 71 | } |
|
72 | 72 | |
|
73 | 73 | pub(super) enum ChildNodesRef<'tree, 'on_disk> { |
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74 | 74 | InMemory(&'tree FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>), |
|
75 | 75 | OnDisk(&'on_disk [on_disk::Node]), |
|
76 | 76 | } |
|
77 | 77 | |
|
78 | 78 | pub(super) enum NodeRef<'tree, 'on_disk> { |
|
79 | 79 | InMemory(&'tree NodeKey<'on_disk>, &'tree Node<'on_disk>), |
|
80 | 80 | OnDisk(&'on_disk on_disk::Node), |
|
81 | 81 | } |
|
82 | 82 | |
|
83 | 83 | impl<'tree, 'on_disk> BorrowedPath<'tree, 'on_disk> { |
|
84 | 84 | pub fn detach_from_tree(&self) -> Cow<'on_disk, HgPath> { |
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85 | 85 | match *self { |
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86 | 86 | BorrowedPath::InMemory(in_memory) => Cow::Owned(in_memory.clone()), |
|
87 | 87 | BorrowedPath::OnDisk(on_disk) => Cow::Borrowed(on_disk), |
|
88 | 88 | } |
|
89 | 89 | } |
|
90 | 90 | } |
|
91 | 91 | |
|
92 | 92 | impl<'tree, 'on_disk> std::ops::Deref for BorrowedPath<'tree, 'on_disk> { |
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93 | 93 | type Target = HgPath; |
|
94 | 94 | |
|
95 | 95 | fn deref(&self) -> &HgPath { |
|
96 | 96 | match *self { |
|
97 | 97 | BorrowedPath::InMemory(in_memory) => in_memory, |
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98 | 98 | BorrowedPath::OnDisk(on_disk) => on_disk, |
|
99 | 99 | } |
|
100 | 100 | } |
|
101 | 101 | } |
|
102 | 102 | |
|
103 | 103 | impl Default for ChildNodes<'_> { |
|
104 | 104 | fn default() -> Self { |
|
105 | 105 | ChildNodes::InMemory(Default::default()) |
|
106 | 106 | } |
|
107 | 107 | } |
|
108 | 108 | |
|
109 | 109 | impl<'on_disk> ChildNodes<'on_disk> { |
|
110 | 110 | pub(super) fn as_ref<'tree>( |
|
111 | 111 | &'tree self, |
|
112 | 112 | ) -> ChildNodesRef<'tree, 'on_disk> { |
|
113 | 113 | match self { |
|
114 | 114 | ChildNodes::InMemory(nodes) => ChildNodesRef::InMemory(nodes), |
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115 | 115 | ChildNodes::OnDisk(nodes) => ChildNodesRef::OnDisk(nodes), |
|
116 | 116 | } |
|
117 | 117 | } |
|
118 | 118 | |
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119 | 119 | pub(super) fn is_empty(&self) -> bool { |
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120 | 120 | match self { |
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121 | 121 | ChildNodes::InMemory(nodes) => nodes.is_empty(), |
|
122 | 122 | ChildNodes::OnDisk(nodes) => nodes.is_empty(), |
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123 | 123 | } |
|
124 | 124 | } |
|
125 | 125 | |
|
126 | 126 | fn make_mut( |
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127 | 127 | &mut self, |
|
128 | 128 | on_disk: &'on_disk [u8], |
|
129 | 129 | unreachable_bytes: &mut u32, |
|
130 | 130 | ) -> Result< |
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131 | 131 | &mut FastHashMap<NodeKey<'on_disk>, Node<'on_disk>>, |
|
132 | 132 | DirstateV2ParseError, |
|
133 | 133 | > { |
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134 | 134 | match self { |
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135 | 135 | ChildNodes::InMemory(nodes) => Ok(nodes), |
|
136 | 136 | ChildNodes::OnDisk(nodes) => { |
|
137 | 137 | *unreachable_bytes += |
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138 | 138 | std::mem::size_of_val::<[on_disk::Node]>(nodes) as u32; |
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139 | 139 | let nodes = nodes |
|
140 | 140 | .iter() |
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141 | 141 | .map(|node| { |
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142 | 142 | Ok(( |
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143 | 143 | node.path(on_disk)?, |
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144 | 144 | node.to_in_memory_node(on_disk)?, |
|
145 | 145 | )) |
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146 | 146 | }) |
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147 | 147 | .collect::<Result<_, _>>()?; |
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148 | 148 | *self = ChildNodes::InMemory(nodes); |
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149 | 149 | match self { |
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150 | 150 | ChildNodes::InMemory(nodes) => Ok(nodes), |
|
151 | 151 | ChildNodes::OnDisk(_) => unreachable!(), |
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152 | 152 | } |
|
153 | 153 | } |
|
154 | 154 | } |
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155 | 155 | } |
|
156 | 156 | } |
|
157 | 157 | |
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158 | 158 | impl<'tree, 'on_disk> ChildNodesRef<'tree, 'on_disk> { |
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159 | 159 | pub(super) fn get( |
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160 | 160 | &self, |
|
161 | 161 | base_name: &HgPath, |
|
162 | 162 | on_disk: &'on_disk [u8], |
|
163 | 163 | ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> { |
|
164 | 164 | match self { |
|
165 | 165 | ChildNodesRef::InMemory(nodes) => Ok(nodes |
|
166 | 166 | .get_key_value(base_name) |
|
167 | 167 | .map(|(k, v)| NodeRef::InMemory(k, v))), |
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168 | 168 | ChildNodesRef::OnDisk(nodes) => { |
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169 | 169 | let mut parse_result = Ok(()); |
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170 | 170 | let search_result = nodes.binary_search_by(|node| { |
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171 | 171 | match node.base_name(on_disk) { |
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172 | 172 | Ok(node_base_name) => node_base_name.cmp(base_name), |
|
173 | 173 | Err(e) => { |
|
174 | 174 | parse_result = Err(e); |
|
175 | 175 | // Dummy comparison result, `search_result` won’t |
|
176 | 176 | // be used since `parse_result` is an error |
|
177 | 177 | std::cmp::Ordering::Equal |
|
178 | 178 | } |
|
179 | 179 | } |
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180 | 180 | }); |
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181 | 181 | parse_result.map(|()| { |
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182 | 182 | search_result.ok().map(|i| NodeRef::OnDisk(&nodes[i])) |
|
183 | 183 | }) |
|
184 | 184 | } |
|
185 | 185 | } |
|
186 | 186 | } |
|
187 | 187 | |
|
188 | 188 | /// Iterate in undefined order |
|
189 | 189 | pub(super) fn iter( |
|
190 | 190 | &self, |
|
191 | 191 | ) -> impl Iterator<Item = NodeRef<'tree, 'on_disk>> { |
|
192 | 192 | match self { |
|
193 | 193 | ChildNodesRef::InMemory(nodes) => itertools::Either::Left( |
|
194 | 194 | nodes.iter().map(|(k, v)| NodeRef::InMemory(k, v)), |
|
195 | 195 | ), |
|
196 | 196 | ChildNodesRef::OnDisk(nodes) => { |
|
197 | 197 | itertools::Either::Right(nodes.iter().map(NodeRef::OnDisk)) |
|
198 | 198 | } |
|
199 | 199 | } |
|
200 | 200 | } |
|
201 | 201 | |
|
202 | 202 | /// Iterate in parallel in undefined order |
|
203 | 203 | pub(super) fn par_iter( |
|
204 | 204 | &self, |
|
205 | 205 | ) -> impl rayon::iter::ParallelIterator<Item = NodeRef<'tree, 'on_disk>> |
|
206 | 206 | { |
|
207 | 207 | use rayon::prelude::*; |
|
208 | 208 | match self { |
|
209 | 209 | ChildNodesRef::InMemory(nodes) => rayon::iter::Either::Left( |
|
210 | 210 | nodes.par_iter().map(|(k, v)| NodeRef::InMemory(k, v)), |
|
211 | 211 | ), |
|
212 | 212 | ChildNodesRef::OnDisk(nodes) => rayon::iter::Either::Right( |
|
213 | 213 | nodes.par_iter().map(NodeRef::OnDisk), |
|
214 | 214 | ), |
|
215 | 215 | } |
|
216 | 216 | } |
|
217 | 217 | |
|
218 | 218 | pub(super) fn sorted(&self) -> Vec<NodeRef<'tree, 'on_disk>> { |
|
219 | 219 | match self { |
|
220 | 220 | ChildNodesRef::InMemory(nodes) => { |
|
221 | 221 | let mut vec: Vec<_> = nodes |
|
222 | 222 | .iter() |
|
223 | 223 | .map(|(k, v)| NodeRef::InMemory(k, v)) |
|
224 | 224 | .collect(); |
|
225 | 225 | fn sort_key<'a>(node: &'a NodeRef) -> &'a HgPath { |
|
226 | 226 | match node { |
|
227 | 227 | NodeRef::InMemory(path, _node) => path.base_name(), |
|
228 | 228 | NodeRef::OnDisk(_) => unreachable!(), |
|
229 | 229 | } |
|
230 | 230 | } |
|
231 | 231 | // `sort_unstable_by_key` doesn’t allow keys borrowing from the |
|
232 | 232 | // value: https://github.com/rust-lang/rust/issues/34162 |
|
233 | 233 | vec.sort_unstable_by(|a, b| sort_key(a).cmp(sort_key(b))); |
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234 | 234 | vec |
|
235 | 235 | } |
|
236 | 236 | ChildNodesRef::OnDisk(nodes) => { |
|
237 | 237 | // Nodes on disk are already sorted |
|
238 | 238 | nodes.iter().map(NodeRef::OnDisk).collect() |
|
239 | 239 | } |
|
240 | 240 | } |
|
241 | 241 | } |
|
242 | 242 | } |
|
243 | 243 | |
|
244 | 244 | impl<'tree, 'on_disk> NodeRef<'tree, 'on_disk> { |
|
245 | 245 | pub(super) fn full_path( |
|
246 | 246 | &self, |
|
247 | 247 | on_disk: &'on_disk [u8], |
|
248 | 248 | ) -> Result<&'tree HgPath, DirstateV2ParseError> { |
|
249 | 249 | match self { |
|
250 | 250 | NodeRef::InMemory(path, _node) => Ok(path.full_path()), |
|
251 | 251 | NodeRef::OnDisk(node) => node.full_path(on_disk), |
|
252 | 252 | } |
|
253 | 253 | } |
|
254 | 254 | |
|
255 | 255 | /// Returns a `BorrowedPath`, which can be turned into a `Cow<'on_disk, |
|
256 | 256 | /// HgPath>` detached from `'tree` |
|
257 | 257 | pub(super) fn full_path_borrowed( |
|
258 | 258 | &self, |
|
259 | 259 | on_disk: &'on_disk [u8], |
|
260 | 260 | ) -> Result<BorrowedPath<'tree, 'on_disk>, DirstateV2ParseError> { |
|
261 | 261 | match self { |
|
262 | 262 | NodeRef::InMemory(path, _node) => match path.full_path() { |
|
263 | 263 | Cow::Borrowed(on_disk) => Ok(BorrowedPath::OnDisk(on_disk)), |
|
264 | 264 | Cow::Owned(in_memory) => Ok(BorrowedPath::InMemory(in_memory)), |
|
265 | 265 | }, |
|
266 | 266 | NodeRef::OnDisk(node) => { |
|
267 | 267 | Ok(BorrowedPath::OnDisk(node.full_path(on_disk)?)) |
|
268 | 268 | } |
|
269 | 269 | } |
|
270 | 270 | } |
|
271 | 271 | |
|
272 | 272 | pub(super) fn base_name( |
|
273 | 273 | &self, |
|
274 | 274 | on_disk: &'on_disk [u8], |
|
275 | 275 | ) -> Result<&'tree HgPath, DirstateV2ParseError> { |
|
276 | 276 | match self { |
|
277 | 277 | NodeRef::InMemory(path, _node) => Ok(path.base_name()), |
|
278 | 278 | NodeRef::OnDisk(node) => node.base_name(on_disk), |
|
279 | 279 | } |
|
280 | 280 | } |
|
281 | 281 | |
|
282 | 282 | pub(super) fn children( |
|
283 | 283 | &self, |
|
284 | 284 | on_disk: &'on_disk [u8], |
|
285 | 285 | ) -> Result<ChildNodesRef<'tree, 'on_disk>, DirstateV2ParseError> { |
|
286 | 286 | match self { |
|
287 | 287 | NodeRef::InMemory(_path, node) => Ok(node.children.as_ref()), |
|
288 | 288 | NodeRef::OnDisk(node) => { |
|
289 | 289 | Ok(ChildNodesRef::OnDisk(node.children(on_disk)?)) |
|
290 | 290 | } |
|
291 | 291 | } |
|
292 | 292 | } |
|
293 | 293 | |
|
294 | 294 | pub(super) fn has_copy_source(&self) -> bool { |
|
295 | 295 | match self { |
|
296 | 296 | NodeRef::InMemory(_path, node) => node.copy_source.is_some(), |
|
297 | 297 | NodeRef::OnDisk(node) => node.has_copy_source(), |
|
298 | 298 | } |
|
299 | 299 | } |
|
300 | 300 | |
|
301 | 301 | pub(super) fn copy_source( |
|
302 | 302 | &self, |
|
303 | 303 | on_disk: &'on_disk [u8], |
|
304 | 304 | ) -> Result<Option<&'tree HgPath>, DirstateV2ParseError> { |
|
305 | 305 | match self { |
|
306 | 306 | NodeRef::InMemory(_path, node) => { |
|
307 | 307 | Ok(node.copy_source.as_ref().map(|s| &**s)) |
|
308 | 308 | } |
|
309 | 309 | NodeRef::OnDisk(node) => node.copy_source(on_disk), |
|
310 | 310 | } |
|
311 | 311 | } |
|
312 | 312 | /// Returns a `BorrowedPath`, which can be turned into a `Cow<'on_disk, |
|
313 | 313 | /// HgPath>` detached from `'tree` |
|
314 | 314 | pub(super) fn copy_source_borrowed( |
|
315 | 315 | &self, |
|
316 | 316 | on_disk: &'on_disk [u8], |
|
317 | 317 | ) -> Result<Option<BorrowedPath<'tree, 'on_disk>>, DirstateV2ParseError> |
|
318 | 318 | { |
|
319 | 319 | Ok(match self { |
|
320 | 320 | NodeRef::InMemory(_path, node) => { |
|
321 | 321 | node.copy_source.as_ref().map(|source| match source { |
|
322 | 322 | Cow::Borrowed(on_disk) => BorrowedPath::OnDisk(on_disk), |
|
323 | 323 | Cow::Owned(in_memory) => BorrowedPath::InMemory(in_memory), |
|
324 | 324 | }) |
|
325 | 325 | } |
|
326 | 326 | NodeRef::OnDisk(node) => node |
|
327 | 327 | .copy_source(on_disk)? |
|
328 | 328 | .map(|source| BorrowedPath::OnDisk(source)), |
|
329 | 329 | }) |
|
330 | 330 | } |
|
331 | 331 | |
|
332 | 332 | pub(super) fn entry( |
|
333 | 333 | &self, |
|
334 | 334 | ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
|
335 | 335 | match self { |
|
336 | 336 | NodeRef::InMemory(_path, node) => { |
|
337 | 337 | Ok(node.data.as_entry().copied()) |
|
338 | 338 | } |
|
339 | 339 | NodeRef::OnDisk(node) => node.entry(), |
|
340 | 340 | } |
|
341 | 341 | } |
|
342 | 342 | |
|
343 | 343 | pub(super) fn state( |
|
344 | 344 | &self, |
|
345 | 345 | ) -> Result<Option<EntryState>, DirstateV2ParseError> { |
|
346 | 346 | Ok(self.entry()?.map(|e| e.state())) |
|
347 | 347 | } |
|
348 | 348 | |
|
349 | 349 | pub(super) fn cached_directory_mtime( |
|
350 | 350 | &self, |
|
351 | 351 | ) -> Result<Option<TruncatedTimestamp>, DirstateV2ParseError> { |
|
352 | 352 | match self { |
|
353 | 353 | NodeRef::InMemory(_path, node) => Ok(match node.data { |
|
354 | 354 | NodeData::CachedDirectory { mtime } => Some(mtime), |
|
355 | 355 | _ => None, |
|
356 | 356 | }), |
|
357 | 357 | NodeRef::OnDisk(node) => node.cached_directory_mtime(), |
|
358 | 358 | } |
|
359 | 359 | } |
|
360 | 360 | |
|
361 | 361 | pub(super) fn descendants_with_entry_count(&self) -> u32 { |
|
362 | 362 | match self { |
|
363 | 363 | NodeRef::InMemory(_path, node) => { |
|
364 | 364 | node.descendants_with_entry_count |
|
365 | 365 | } |
|
366 | 366 | NodeRef::OnDisk(node) => node.descendants_with_entry_count.get(), |
|
367 | 367 | } |
|
368 | 368 | } |
|
369 | 369 | |
|
370 | 370 | pub(super) fn tracked_descendants_count(&self) -> u32 { |
|
371 | 371 | match self { |
|
372 | 372 | NodeRef::InMemory(_path, node) => node.tracked_descendants_count, |
|
373 | 373 | NodeRef::OnDisk(node) => node.tracked_descendants_count.get(), |
|
374 | 374 | } |
|
375 | 375 | } |
|
376 | 376 | } |
|
377 | 377 | |
|
378 | 378 | /// Represents a file or a directory |
|
379 | 379 | #[derive(Default)] |
|
380 | 380 | pub(super) struct Node<'on_disk> { |
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381 | 381 | pub(super) data: NodeData, |
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382 | 382 | |
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383 | 383 | pub(super) copy_source: Option<Cow<'on_disk, HgPath>>, |
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384 | 384 | |
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385 | 385 | pub(super) children: ChildNodes<'on_disk>, |
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386 | 386 | |
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387 | 387 | /// How many (non-inclusive) descendants of this node have an entry. |
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388 | 388 | pub(super) descendants_with_entry_count: u32, |
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389 | 389 | |
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390 | 390 | /// How many (non-inclusive) descendants of this node have an entry whose |
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391 | 391 | /// state is "tracked". |
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392 | 392 | pub(super) tracked_descendants_count: u32, |
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393 | 393 | } |
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394 | 394 | |
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395 | 395 | pub(super) enum NodeData { |
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396 | 396 | Entry(DirstateEntry), |
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397 | 397 | CachedDirectory { mtime: TruncatedTimestamp }, |
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398 | 398 | None, |
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399 | 399 | } |
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400 | 400 | |
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401 | 401 | impl Default for NodeData { |
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402 | 402 | fn default() -> Self { |
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403 | 403 | NodeData::None |
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404 | 404 | } |
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405 | 405 | } |
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406 | 406 | |
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407 | 407 | impl NodeData { |
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408 | 408 | fn has_entry(&self) -> bool { |
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409 | 409 | match self { |
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410 | 410 | NodeData::Entry(_) => true, |
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411 | 411 | _ => false, |
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412 | 412 | } |
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413 | 413 | } |
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414 | 414 | |
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415 | 415 | fn as_entry(&self) -> Option<&DirstateEntry> { |
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416 | 416 | match self { |
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417 | 417 | NodeData::Entry(entry) => Some(entry), |
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418 | 418 | _ => None, |
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419 | 419 | } |
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420 | 420 | } |
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421 | 421 | } |
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422 | 422 | |
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423 | 423 | impl<'on_disk> DirstateMap<'on_disk> { |
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424 | 424 | pub(super) fn empty(on_disk: &'on_disk [u8]) -> Self { |
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425 | 425 | Self { |
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426 | 426 | on_disk, |
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427 | 427 | root: ChildNodes::default(), |
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428 | 428 | nodes_with_entry_count: 0, |
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429 | 429 | nodes_with_copy_source_count: 0, |
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430 | 430 | ignore_patterns_hash: [0; on_disk::IGNORE_PATTERNS_HASH_LEN], |
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431 | 431 | unreachable_bytes: 0, |
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432 | 432 | } |
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433 | 433 | } |
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434 | 434 | |
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435 | 435 | #[timed] |
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436 | 436 | pub fn new_v2( |
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437 | 437 | on_disk: &'on_disk [u8], |
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438 | 438 | data_size: usize, |
|
439 | 439 | metadata: &[u8], |
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440 | 440 | ) -> Result<Self, DirstateError> { |
|
441 | 441 | if let Some(data) = on_disk.get(..data_size) { |
|
442 | 442 | Ok(on_disk::read(data, metadata)?) |
|
443 | 443 | } else { |
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444 | 444 | Err(DirstateV2ParseError.into()) |
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445 | 445 | } |
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446 | 446 | } |
|
447 | 447 | |
|
448 | 448 | #[timed] |
|
449 | 449 | pub fn new_v1( |
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450 | 450 | on_disk: &'on_disk [u8], |
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451 | 451 | ) -> Result<(Self, Option<DirstateParents>), DirstateError> { |
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452 | 452 | let mut map = Self::empty(on_disk); |
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453 | 453 | if map.on_disk.is_empty() { |
|
454 | 454 | return Ok((map, None)); |
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455 | 455 | } |
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456 | 456 | |
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457 | 457 | let parents = parse_dirstate_entries( |
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458 | 458 | map.on_disk, |
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459 | 459 | |path, entry, copy_source| { |
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460 | 460 | let tracked = entry.state().is_tracked(); |
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461 | 461 | let node = Self::get_or_insert_node( |
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462 | 462 | map.on_disk, |
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463 | 463 | &mut map.unreachable_bytes, |
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464 | 464 | &mut map.root, |
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465 | 465 | path, |
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466 | 466 | WithBasename::to_cow_borrowed, |
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467 | 467 | |ancestor| { |
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468 | 468 | if tracked { |
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469 | 469 | ancestor.tracked_descendants_count += 1 |
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470 | 470 | } |
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471 | 471 | ancestor.descendants_with_entry_count += 1 |
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472 | 472 | }, |
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473 | 473 | )?; |
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474 | 474 | assert!( |
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475 | 475 | !node.data.has_entry(), |
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476 | 476 | "duplicate dirstate entry in read" |
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477 | 477 | ); |
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478 | 478 | assert!( |
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479 | 479 | node.copy_source.is_none(), |
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480 | 480 | "duplicate dirstate entry in read" |
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481 | 481 | ); |
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482 | 482 | node.data = NodeData::Entry(*entry); |
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483 | 483 | node.copy_source = copy_source.map(Cow::Borrowed); |
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484 | 484 | map.nodes_with_entry_count += 1; |
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485 | 485 | if copy_source.is_some() { |
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486 | 486 | map.nodes_with_copy_source_count += 1 |
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487 | 487 | } |
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488 | 488 | Ok(()) |
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489 | 489 | }, |
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490 | 490 | )?; |
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491 | 491 | let parents = Some(parents.clone()); |
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492 | 492 | |
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493 | 493 | Ok((map, parents)) |
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494 | 494 | } |
|
495 | 495 | |
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496 | 496 | /// Assuming dirstate-v2 format, returns whether the next write should |
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497 | 497 | /// append to the existing data file that contains `self.on_disk` (true), |
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498 | 498 | /// or create a new data file from scratch (false). |
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499 | 499 | pub(super) fn write_should_append(&self) -> bool { |
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500 | 500 | let ratio = self.unreachable_bytes as f32 / self.on_disk.len() as f32; |
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501 | 501 | ratio < ACCEPTABLE_UNREACHABLE_BYTES_RATIO |
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502 | 502 | } |
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503 | 503 | |
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504 | 504 | fn get_node<'tree>( |
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505 | 505 | &'tree self, |
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506 | 506 | path: &HgPath, |
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507 | 507 | ) -> Result<Option<NodeRef<'tree, 'on_disk>>, DirstateV2ParseError> { |
|
508 | 508 | let mut children = self.root.as_ref(); |
|
509 | 509 | let mut components = path.components(); |
|
510 | 510 | let mut component = |
|
511 | 511 | components.next().expect("expected at least one components"); |
|
512 | 512 | loop { |
|
513 | 513 | if let Some(child) = children.get(component, self.on_disk)? { |
|
514 | 514 | if let Some(next_component) = components.next() { |
|
515 | 515 | component = next_component; |
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516 | 516 | children = child.children(self.on_disk)?; |
|
517 | 517 | } else { |
|
518 | 518 | return Ok(Some(child)); |
|
519 | 519 | } |
|
520 | 520 | } else { |
|
521 | 521 | return Ok(None); |
|
522 | 522 | } |
|
523 | 523 | } |
|
524 | 524 | } |
|
525 | 525 | |
|
526 | 526 | /// Returns a mutable reference to the node at `path` if it exists |
|
527 | 527 | /// |
|
528 | 528 | /// This takes `root` instead of `&mut self` so that callers can mutate |
|
529 | 529 | /// other fields while the returned borrow is still valid |
|
530 | 530 | fn get_node_mut<'tree>( |
|
531 | 531 | on_disk: &'on_disk [u8], |
|
532 | 532 | unreachable_bytes: &mut u32, |
|
533 | 533 | root: &'tree mut ChildNodes<'on_disk>, |
|
534 | 534 | path: &HgPath, |
|
535 | 535 | ) -> Result<Option<&'tree mut Node<'on_disk>>, DirstateV2ParseError> { |
|
536 | 536 | let mut children = root; |
|
537 | 537 | let mut components = path.components(); |
|
538 | 538 | let mut component = |
|
539 | 539 | components.next().expect("expected at least one components"); |
|
540 | 540 | loop { |
|
541 | 541 | if let Some(child) = children |
|
542 | 542 | .make_mut(on_disk, unreachable_bytes)? |
|
543 | 543 | .get_mut(component) |
|
544 | 544 | { |
|
545 | 545 | if let Some(next_component) = components.next() { |
|
546 | 546 | component = next_component; |
|
547 | 547 | children = &mut child.children; |
|
548 | 548 | } else { |
|
549 | 549 | return Ok(Some(child)); |
|
550 | 550 | } |
|
551 | 551 | } else { |
|
552 | 552 | return Ok(None); |
|
553 | 553 | } |
|
554 | 554 | } |
|
555 | 555 | } |
|
556 | 556 | |
|
557 | 557 | pub(super) fn get_or_insert<'tree, 'path>( |
|
558 | 558 | &'tree mut self, |
|
559 | 559 | path: &HgPath, |
|
560 | 560 | ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> { |
|
561 | 561 | Self::get_or_insert_node( |
|
562 | 562 | self.on_disk, |
|
563 | 563 | &mut self.unreachable_bytes, |
|
564 | 564 | &mut self.root, |
|
565 | 565 | path, |
|
566 | 566 | WithBasename::to_cow_owned, |
|
567 | 567 | |_| {}, |
|
568 | 568 | ) |
|
569 | 569 | } |
|
570 | 570 | |
|
571 | 571 | fn get_or_insert_node<'tree, 'path>( |
|
572 | 572 | on_disk: &'on_disk [u8], |
|
573 | 573 | unreachable_bytes: &mut u32, |
|
574 | 574 | root: &'tree mut ChildNodes<'on_disk>, |
|
575 | 575 | path: &'path HgPath, |
|
576 | 576 | to_cow: impl Fn( |
|
577 | 577 | WithBasename<&'path HgPath>, |
|
578 | 578 | ) -> WithBasename<Cow<'on_disk, HgPath>>, |
|
579 | 579 | mut each_ancestor: impl FnMut(&mut Node), |
|
580 | 580 | ) -> Result<&'tree mut Node<'on_disk>, DirstateV2ParseError> { |
|
581 | 581 | let mut child_nodes = root; |
|
582 | 582 | let mut inclusive_ancestor_paths = |
|
583 | 583 | WithBasename::inclusive_ancestors_of(path); |
|
584 | 584 | let mut ancestor_path = inclusive_ancestor_paths |
|
585 | 585 | .next() |
|
586 | 586 | .expect("expected at least one inclusive ancestor"); |
|
587 | 587 | loop { |
|
588 | // TODO: can we avoid allocating an owned key in cases where the | |
|
589 | // map already contains that key, without introducing double | |
|
590 | // lookup? | |
|
591 | let child_node = child_nodes | |
|
588 | let (_, child_node) = child_nodes | |
|
592 | 589 | .make_mut(on_disk, unreachable_bytes)? |
|
593 |
.entry( |
|
|
594 | .or_default(); | |
|
590 | .raw_entry_mut() | |
|
591 | .from_key(ancestor_path.base_name()) | |
|
592 | .or_insert_with(|| (to_cow(ancestor_path), Node::default())); | |
|
595 | 593 | if let Some(next) = inclusive_ancestor_paths.next() { |
|
596 | 594 | each_ancestor(child_node); |
|
597 | 595 | ancestor_path = next; |
|
598 | 596 | child_nodes = &mut child_node.children; |
|
599 | 597 | } else { |
|
600 | 598 | return Ok(child_node); |
|
601 | 599 | } |
|
602 | 600 | } |
|
603 | 601 | } |
|
604 | 602 | |
|
605 | 603 | fn add_or_remove_file( |
|
606 | 604 | &mut self, |
|
607 | 605 | path: &HgPath, |
|
608 | 606 | old_state: Option<EntryState>, |
|
609 | 607 | new_entry: DirstateEntry, |
|
610 | 608 | ) -> Result<(), DirstateV2ParseError> { |
|
611 | 609 | let had_entry = old_state.is_some(); |
|
612 | 610 | let was_tracked = old_state.map_or(false, |s| s.is_tracked()); |
|
613 | 611 | let tracked_count_increment = |
|
614 | 612 | match (was_tracked, new_entry.state().is_tracked()) { |
|
615 | 613 | (false, true) => 1, |
|
616 | 614 | (true, false) => -1, |
|
617 | 615 | _ => 0, |
|
618 | 616 | }; |
|
619 | 617 | |
|
620 | 618 | let node = Self::get_or_insert_node( |
|
621 | 619 | self.on_disk, |
|
622 | 620 | &mut self.unreachable_bytes, |
|
623 | 621 | &mut self.root, |
|
624 | 622 | path, |
|
625 | 623 | WithBasename::to_cow_owned, |
|
626 | 624 | |ancestor| { |
|
627 | 625 | if !had_entry { |
|
628 | 626 | ancestor.descendants_with_entry_count += 1; |
|
629 | 627 | } |
|
630 | 628 | |
|
631 | 629 | // We can’t use `+= increment` because the counter is unsigned, |
|
632 | 630 | // and we want debug builds to detect accidental underflow |
|
633 | 631 | // through zero |
|
634 | 632 | match tracked_count_increment { |
|
635 | 633 | 1 => ancestor.tracked_descendants_count += 1, |
|
636 | 634 | -1 => ancestor.tracked_descendants_count -= 1, |
|
637 | 635 | _ => {} |
|
638 | 636 | } |
|
639 | 637 | }, |
|
640 | 638 | )?; |
|
641 | 639 | if !had_entry { |
|
642 | 640 | self.nodes_with_entry_count += 1 |
|
643 | 641 | } |
|
644 | 642 | node.data = NodeData::Entry(new_entry); |
|
645 | 643 | Ok(()) |
|
646 | 644 | } |
|
647 | 645 | |
|
648 | 646 | fn iter_nodes<'tree>( |
|
649 | 647 | &'tree self, |
|
650 | 648 | ) -> impl Iterator< |
|
651 | 649 | Item = Result<NodeRef<'tree, 'on_disk>, DirstateV2ParseError>, |
|
652 | 650 | > + 'tree { |
|
653 | 651 | // Depth first tree traversal. |
|
654 | 652 | // |
|
655 | 653 | // If we could afford internal iteration and recursion, |
|
656 | 654 | // this would look like: |
|
657 | 655 | // |
|
658 | 656 | // ``` |
|
659 | 657 | // fn traverse_children( |
|
660 | 658 | // children: &ChildNodes, |
|
661 | 659 | // each: &mut impl FnMut(&Node), |
|
662 | 660 | // ) { |
|
663 | 661 | // for child in children.values() { |
|
664 | 662 | // traverse_children(&child.children, each); |
|
665 | 663 | // each(child); |
|
666 | 664 | // } |
|
667 | 665 | // } |
|
668 | 666 | // ``` |
|
669 | 667 | // |
|
670 | 668 | // However we want an external iterator and therefore can’t use the |
|
671 | 669 | // call stack. Use an explicit stack instead: |
|
672 | 670 | let mut stack = Vec::new(); |
|
673 | 671 | let mut iter = self.root.as_ref().iter(); |
|
674 | 672 | std::iter::from_fn(move || { |
|
675 | 673 | while let Some(child_node) = iter.next() { |
|
676 | 674 | let children = match child_node.children(self.on_disk) { |
|
677 | 675 | Ok(children) => children, |
|
678 | 676 | Err(error) => return Some(Err(error)), |
|
679 | 677 | }; |
|
680 | 678 | // Pseudo-recursion |
|
681 | 679 | let new_iter = children.iter(); |
|
682 | 680 | let old_iter = std::mem::replace(&mut iter, new_iter); |
|
683 | 681 | stack.push((child_node, old_iter)); |
|
684 | 682 | } |
|
685 | 683 | // Found the end of a `children.iter()` iterator. |
|
686 | 684 | if let Some((child_node, next_iter)) = stack.pop() { |
|
687 | 685 | // "Return" from pseudo-recursion by restoring state from the |
|
688 | 686 | // explicit stack |
|
689 | 687 | iter = next_iter; |
|
690 | 688 | |
|
691 | 689 | Some(Ok(child_node)) |
|
692 | 690 | } else { |
|
693 | 691 | // Reached the bottom of the stack, we’re done |
|
694 | 692 | None |
|
695 | 693 | } |
|
696 | 694 | }) |
|
697 | 695 | } |
|
698 | 696 | |
|
699 | 697 | fn count_dropped_path(unreachable_bytes: &mut u32, path: &Cow<HgPath>) { |
|
700 | 698 | if let Cow::Borrowed(path) = path { |
|
701 | 699 | *unreachable_bytes += path.len() as u32 |
|
702 | 700 | } |
|
703 | 701 | } |
|
704 | 702 | } |
|
705 | 703 | |
|
706 | 704 | /// Like `Iterator::filter_map`, but over a fallible iterator of `Result`s. |
|
707 | 705 | /// |
|
708 | 706 | /// The callback is only called for incoming `Ok` values. Errors are passed |
|
709 | 707 | /// through as-is. In order to let it use the `?` operator the callback is |
|
710 | 708 | /// expected to return a `Result` of `Option`, instead of an `Option` of |
|
711 | 709 | /// `Result`. |
|
712 | 710 | fn filter_map_results<'a, I, F, A, B, E>( |
|
713 | 711 | iter: I, |
|
714 | 712 | f: F, |
|
715 | 713 | ) -> impl Iterator<Item = Result<B, E>> + 'a |
|
716 | 714 | where |
|
717 | 715 | I: Iterator<Item = Result<A, E>> + 'a, |
|
718 | 716 | F: Fn(A) -> Result<Option<B>, E> + 'a, |
|
719 | 717 | { |
|
720 | 718 | iter.filter_map(move |result| match result { |
|
721 | 719 | Ok(node) => f(node).transpose(), |
|
722 | 720 | Err(e) => Some(Err(e)), |
|
723 | 721 | }) |
|
724 | 722 | } |
|
725 | 723 | |
|
726 | 724 | impl OwningDirstateMap { |
|
727 | 725 | pub fn clear(&mut self) { |
|
728 | 726 | let map = self.get_map_mut(); |
|
729 | 727 | map.root = Default::default(); |
|
730 | 728 | map.nodes_with_entry_count = 0; |
|
731 | 729 | map.nodes_with_copy_source_count = 0; |
|
732 | 730 | } |
|
733 | 731 | |
|
734 | 732 | pub fn set_entry( |
|
735 | 733 | &mut self, |
|
736 | 734 | filename: &HgPath, |
|
737 | 735 | entry: DirstateEntry, |
|
738 | 736 | ) -> Result<(), DirstateV2ParseError> { |
|
739 | 737 | let map = self.get_map_mut(); |
|
740 | 738 | map.get_or_insert(&filename)?.data = NodeData::Entry(entry); |
|
741 | 739 | Ok(()) |
|
742 | 740 | } |
|
743 | 741 | |
|
744 | 742 | pub fn add_file( |
|
745 | 743 | &mut self, |
|
746 | 744 | filename: &HgPath, |
|
747 | 745 | entry: DirstateEntry, |
|
748 | 746 | ) -> Result<(), DirstateError> { |
|
749 | 747 | let old_state = self.get(filename)?.map(|e| e.state()); |
|
750 | 748 | let map = self.get_map_mut(); |
|
751 | 749 | Ok(map.add_or_remove_file(filename, old_state, entry)?) |
|
752 | 750 | } |
|
753 | 751 | |
|
754 | 752 | pub fn remove_file( |
|
755 | 753 | &mut self, |
|
756 | 754 | filename: &HgPath, |
|
757 | 755 | in_merge: bool, |
|
758 | 756 | ) -> Result<(), DirstateError> { |
|
759 | 757 | let old_entry_opt = self.get(filename)?; |
|
760 | 758 | let old_state = old_entry_opt.map(|e| e.state()); |
|
761 | 759 | let mut size = 0; |
|
762 | 760 | if in_merge { |
|
763 | 761 | // XXX we should not be able to have 'm' state and 'FROM_P2' if not |
|
764 | 762 | // during a merge. So I (marmoute) am not sure we need the |
|
765 | 763 | // conditionnal at all. Adding double checking this with assert |
|
766 | 764 | // would be nice. |
|
767 | 765 | if let Some(old_entry) = old_entry_opt { |
|
768 | 766 | // backup the previous state |
|
769 | 767 | if old_entry.state() == EntryState::Merged { |
|
770 | 768 | size = SIZE_NON_NORMAL; |
|
771 | 769 | } else if old_entry.state() == EntryState::Normal |
|
772 | 770 | && old_entry.size() == SIZE_FROM_OTHER_PARENT |
|
773 | 771 | { |
|
774 | 772 | // other parent |
|
775 | 773 | size = SIZE_FROM_OTHER_PARENT; |
|
776 | 774 | } |
|
777 | 775 | } |
|
778 | 776 | } |
|
779 | 777 | if size == 0 { |
|
780 | 778 | self.copy_map_remove(filename)?; |
|
781 | 779 | } |
|
782 | 780 | let map = self.get_map_mut(); |
|
783 | 781 | let entry = DirstateEntry::new_removed(size); |
|
784 | 782 | Ok(map.add_or_remove_file(filename, old_state, entry)?) |
|
785 | 783 | } |
|
786 | 784 | |
|
787 | 785 | pub fn drop_entry_and_copy_source( |
|
788 | 786 | &mut self, |
|
789 | 787 | filename: &HgPath, |
|
790 | 788 | ) -> Result<(), DirstateError> { |
|
791 | 789 | let was_tracked = self |
|
792 | 790 | .get(filename)? |
|
793 | 791 | .map_or(false, |e| e.state().is_tracked()); |
|
794 | 792 | let map = self.get_map_mut(); |
|
795 | 793 | struct Dropped { |
|
796 | 794 | was_tracked: bool, |
|
797 | 795 | had_entry: bool, |
|
798 | 796 | had_copy_source: bool, |
|
799 | 797 | } |
|
800 | 798 | |
|
801 | 799 | /// If this returns `Ok(Some((dropped, removed)))`, then |
|
802 | 800 | /// |
|
803 | 801 | /// * `dropped` is about the leaf node that was at `filename` |
|
804 | 802 | /// * `removed` is whether this particular level of recursion just |
|
805 | 803 | /// removed a node in `nodes`. |
|
806 | 804 | fn recur<'on_disk>( |
|
807 | 805 | on_disk: &'on_disk [u8], |
|
808 | 806 | unreachable_bytes: &mut u32, |
|
809 | 807 | nodes: &mut ChildNodes<'on_disk>, |
|
810 | 808 | path: &HgPath, |
|
811 | 809 | ) -> Result<Option<(Dropped, bool)>, DirstateV2ParseError> { |
|
812 | 810 | let (first_path_component, rest_of_path) = |
|
813 | 811 | path.split_first_component(); |
|
814 | 812 | let nodes = nodes.make_mut(on_disk, unreachable_bytes)?; |
|
815 | 813 | let node = if let Some(node) = nodes.get_mut(first_path_component) |
|
816 | 814 | { |
|
817 | 815 | node |
|
818 | 816 | } else { |
|
819 | 817 | return Ok(None); |
|
820 | 818 | }; |
|
821 | 819 | let dropped; |
|
822 | 820 | if let Some(rest) = rest_of_path { |
|
823 | 821 | if let Some((d, removed)) = recur( |
|
824 | 822 | on_disk, |
|
825 | 823 | unreachable_bytes, |
|
826 | 824 | &mut node.children, |
|
827 | 825 | rest, |
|
828 | 826 | )? { |
|
829 | 827 | dropped = d; |
|
830 | 828 | if dropped.had_entry { |
|
831 | 829 | node.descendants_with_entry_count -= 1; |
|
832 | 830 | } |
|
833 | 831 | if dropped.was_tracked { |
|
834 | 832 | node.tracked_descendants_count -= 1; |
|
835 | 833 | } |
|
836 | 834 | |
|
837 | 835 | // Directory caches must be invalidated when removing a |
|
838 | 836 | // child node |
|
839 | 837 | if removed { |
|
840 | 838 | if let NodeData::CachedDirectory { .. } = &node.data { |
|
841 | 839 | node.data = NodeData::None |
|
842 | 840 | } |
|
843 | 841 | } |
|
844 | 842 | } else { |
|
845 | 843 | return Ok(None); |
|
846 | 844 | } |
|
847 | 845 | } else { |
|
848 | 846 | let had_entry = node.data.has_entry(); |
|
849 | 847 | if had_entry { |
|
850 | 848 | node.data = NodeData::None |
|
851 | 849 | } |
|
852 | 850 | if let Some(source) = &node.copy_source { |
|
853 | 851 | DirstateMap::count_dropped_path(unreachable_bytes, source); |
|
854 | 852 | node.copy_source = None |
|
855 | 853 | } |
|
856 | 854 | dropped = Dropped { |
|
857 | 855 | was_tracked: node |
|
858 | 856 | .data |
|
859 | 857 | .as_entry() |
|
860 | 858 | .map_or(false, |entry| entry.state().is_tracked()), |
|
861 | 859 | had_entry, |
|
862 | 860 | had_copy_source: node.copy_source.take().is_some(), |
|
863 | 861 | }; |
|
864 | 862 | } |
|
865 | 863 | // After recursion, for both leaf (rest_of_path is None) nodes and |
|
866 | 864 | // parent nodes, remove a node if it just became empty. |
|
867 | 865 | let remove = !node.data.has_entry() |
|
868 | 866 | && node.copy_source.is_none() |
|
869 | 867 | && node.children.is_empty(); |
|
870 | 868 | if remove { |
|
871 | 869 | let (key, _) = |
|
872 | 870 | nodes.remove_entry(first_path_component).unwrap(); |
|
873 | 871 | DirstateMap::count_dropped_path( |
|
874 | 872 | unreachable_bytes, |
|
875 | 873 | key.full_path(), |
|
876 | 874 | ) |
|
877 | 875 | } |
|
878 | 876 | Ok(Some((dropped, remove))) |
|
879 | 877 | } |
|
880 | 878 | |
|
881 | 879 | if let Some((dropped, _removed)) = recur( |
|
882 | 880 | map.on_disk, |
|
883 | 881 | &mut map.unreachable_bytes, |
|
884 | 882 | &mut map.root, |
|
885 | 883 | filename, |
|
886 | 884 | )? { |
|
887 | 885 | if dropped.had_entry { |
|
888 | 886 | map.nodes_with_entry_count -= 1 |
|
889 | 887 | } |
|
890 | 888 | if dropped.had_copy_source { |
|
891 | 889 | map.nodes_with_copy_source_count -= 1 |
|
892 | 890 | } |
|
893 | 891 | } else { |
|
894 | 892 | debug_assert!(!was_tracked); |
|
895 | 893 | } |
|
896 | 894 | Ok(()) |
|
897 | 895 | } |
|
898 | 896 | |
|
899 | 897 | pub fn has_tracked_dir( |
|
900 | 898 | &mut self, |
|
901 | 899 | directory: &HgPath, |
|
902 | 900 | ) -> Result<bool, DirstateError> { |
|
903 | 901 | let map = self.get_map_mut(); |
|
904 | 902 | if let Some(node) = map.get_node(directory)? { |
|
905 | 903 | // A node without a `DirstateEntry` was created to hold child |
|
906 | 904 | // nodes, and is therefore a directory. |
|
907 | 905 | let state = node.state()?; |
|
908 | 906 | Ok(state.is_none() && node.tracked_descendants_count() > 0) |
|
909 | 907 | } else { |
|
910 | 908 | Ok(false) |
|
911 | 909 | } |
|
912 | 910 | } |
|
913 | 911 | |
|
914 | 912 | pub fn has_dir( |
|
915 | 913 | &mut self, |
|
916 | 914 | directory: &HgPath, |
|
917 | 915 | ) -> Result<bool, DirstateError> { |
|
918 | 916 | let map = self.get_map_mut(); |
|
919 | 917 | if let Some(node) = map.get_node(directory)? { |
|
920 | 918 | // A node without a `DirstateEntry` was created to hold child |
|
921 | 919 | // nodes, and is therefore a directory. |
|
922 | 920 | let state = node.state()?; |
|
923 | 921 | Ok(state.is_none() && node.descendants_with_entry_count() > 0) |
|
924 | 922 | } else { |
|
925 | 923 | Ok(false) |
|
926 | 924 | } |
|
927 | 925 | } |
|
928 | 926 | |
|
929 | 927 | #[timed] |
|
930 | 928 | pub fn pack_v1( |
|
931 | 929 | &self, |
|
932 | 930 | parents: DirstateParents, |
|
933 | 931 | ) -> Result<Vec<u8>, DirstateError> { |
|
934 | 932 | let map = self.get_map(); |
|
935 | 933 | // Optizimation (to be measured?): pre-compute size to avoid `Vec` |
|
936 | 934 | // reallocations |
|
937 | 935 | let mut size = parents.as_bytes().len(); |
|
938 | 936 | for node in map.iter_nodes() { |
|
939 | 937 | let node = node?; |
|
940 | 938 | if node.entry()?.is_some() { |
|
941 | 939 | size += packed_entry_size( |
|
942 | 940 | node.full_path(map.on_disk)?, |
|
943 | 941 | node.copy_source(map.on_disk)?, |
|
944 | 942 | ); |
|
945 | 943 | } |
|
946 | 944 | } |
|
947 | 945 | |
|
948 | 946 | let mut packed = Vec::with_capacity(size); |
|
949 | 947 | packed.extend(parents.as_bytes()); |
|
950 | 948 | |
|
951 | 949 | for node in map.iter_nodes() { |
|
952 | 950 | let node = node?; |
|
953 | 951 | if let Some(entry) = node.entry()? { |
|
954 | 952 | pack_entry( |
|
955 | 953 | node.full_path(map.on_disk)?, |
|
956 | 954 | &entry, |
|
957 | 955 | node.copy_source(map.on_disk)?, |
|
958 | 956 | &mut packed, |
|
959 | 957 | ); |
|
960 | 958 | } |
|
961 | 959 | } |
|
962 | 960 | Ok(packed) |
|
963 | 961 | } |
|
964 | 962 | |
|
965 | 963 | /// Returns new data and metadata together with whether that data should be |
|
966 | 964 | /// appended to the existing data file whose content is at |
|
967 | 965 | /// `map.on_disk` (true), instead of written to a new data file |
|
968 | 966 | /// (false). |
|
969 | 967 | #[timed] |
|
970 | 968 | pub fn pack_v2( |
|
971 | 969 | &self, |
|
972 | 970 | can_append: bool, |
|
973 | 971 | ) -> Result<(Vec<u8>, on_disk::TreeMetadata, bool), DirstateError> { |
|
974 | 972 | let map = self.get_map(); |
|
975 | 973 | on_disk::write(map, can_append) |
|
976 | 974 | } |
|
977 | 975 | |
|
978 | 976 | pub fn status<'a>( |
|
979 | 977 | &'a mut self, |
|
980 | 978 | matcher: &'a (dyn Matcher + Sync), |
|
981 | 979 | root_dir: PathBuf, |
|
982 | 980 | ignore_files: Vec<PathBuf>, |
|
983 | 981 | options: StatusOptions, |
|
984 | 982 | ) -> Result<(DirstateStatus<'a>, Vec<PatternFileWarning>), StatusError> |
|
985 | 983 | { |
|
986 | 984 | let map = self.get_map_mut(); |
|
987 | 985 | super::status::status(map, matcher, root_dir, ignore_files, options) |
|
988 | 986 | } |
|
989 | 987 | |
|
990 | 988 | pub fn copy_map_len(&self) -> usize { |
|
991 | 989 | let map = self.get_map(); |
|
992 | 990 | map.nodes_with_copy_source_count as usize |
|
993 | 991 | } |
|
994 | 992 | |
|
995 | 993 | pub fn copy_map_iter(&self) -> CopyMapIter<'_> { |
|
996 | 994 | let map = self.get_map(); |
|
997 | 995 | Box::new(filter_map_results(map.iter_nodes(), move |node| { |
|
998 | 996 | Ok(if let Some(source) = node.copy_source(map.on_disk)? { |
|
999 | 997 | Some((node.full_path(map.on_disk)?, source)) |
|
1000 | 998 | } else { |
|
1001 | 999 | None |
|
1002 | 1000 | }) |
|
1003 | 1001 | })) |
|
1004 | 1002 | } |
|
1005 | 1003 | |
|
1006 | 1004 | pub fn copy_map_contains_key( |
|
1007 | 1005 | &self, |
|
1008 | 1006 | key: &HgPath, |
|
1009 | 1007 | ) -> Result<bool, DirstateV2ParseError> { |
|
1010 | 1008 | let map = self.get_map(); |
|
1011 | 1009 | Ok(if let Some(node) = map.get_node(key)? { |
|
1012 | 1010 | node.has_copy_source() |
|
1013 | 1011 | } else { |
|
1014 | 1012 | false |
|
1015 | 1013 | }) |
|
1016 | 1014 | } |
|
1017 | 1015 | |
|
1018 | 1016 | pub fn copy_map_get( |
|
1019 | 1017 | &self, |
|
1020 | 1018 | key: &HgPath, |
|
1021 | 1019 | ) -> Result<Option<&HgPath>, DirstateV2ParseError> { |
|
1022 | 1020 | let map = self.get_map(); |
|
1023 | 1021 | if let Some(node) = map.get_node(key)? { |
|
1024 | 1022 | if let Some(source) = node.copy_source(map.on_disk)? { |
|
1025 | 1023 | return Ok(Some(source)); |
|
1026 | 1024 | } |
|
1027 | 1025 | } |
|
1028 | 1026 | Ok(None) |
|
1029 | 1027 | } |
|
1030 | 1028 | |
|
1031 | 1029 | pub fn copy_map_remove( |
|
1032 | 1030 | &mut self, |
|
1033 | 1031 | key: &HgPath, |
|
1034 | 1032 | ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
|
1035 | 1033 | let map = self.get_map_mut(); |
|
1036 | 1034 | let count = &mut map.nodes_with_copy_source_count; |
|
1037 | 1035 | let unreachable_bytes = &mut map.unreachable_bytes; |
|
1038 | 1036 | Ok(DirstateMap::get_node_mut( |
|
1039 | 1037 | map.on_disk, |
|
1040 | 1038 | unreachable_bytes, |
|
1041 | 1039 | &mut map.root, |
|
1042 | 1040 | key, |
|
1043 | 1041 | )? |
|
1044 | 1042 | .and_then(|node| { |
|
1045 | 1043 | if let Some(source) = &node.copy_source { |
|
1046 | 1044 | *count -= 1; |
|
1047 | 1045 | DirstateMap::count_dropped_path(unreachable_bytes, source); |
|
1048 | 1046 | } |
|
1049 | 1047 | node.copy_source.take().map(Cow::into_owned) |
|
1050 | 1048 | })) |
|
1051 | 1049 | } |
|
1052 | 1050 | |
|
1053 | 1051 | pub fn copy_map_insert( |
|
1054 | 1052 | &mut self, |
|
1055 | 1053 | key: HgPathBuf, |
|
1056 | 1054 | value: HgPathBuf, |
|
1057 | 1055 | ) -> Result<Option<HgPathBuf>, DirstateV2ParseError> { |
|
1058 | 1056 | let map = self.get_map_mut(); |
|
1059 | 1057 | let node = DirstateMap::get_or_insert_node( |
|
1060 | 1058 | map.on_disk, |
|
1061 | 1059 | &mut map.unreachable_bytes, |
|
1062 | 1060 | &mut map.root, |
|
1063 | 1061 | &key, |
|
1064 | 1062 | WithBasename::to_cow_owned, |
|
1065 | 1063 | |_ancestor| {}, |
|
1066 | 1064 | )?; |
|
1067 | 1065 | if node.copy_source.is_none() { |
|
1068 | 1066 | map.nodes_with_copy_source_count += 1 |
|
1069 | 1067 | } |
|
1070 | 1068 | Ok(node.copy_source.replace(value.into()).map(Cow::into_owned)) |
|
1071 | 1069 | } |
|
1072 | 1070 | |
|
1073 | 1071 | pub fn len(&self) -> usize { |
|
1074 | 1072 | let map = self.get_map(); |
|
1075 | 1073 | map.nodes_with_entry_count as usize |
|
1076 | 1074 | } |
|
1077 | 1075 | |
|
1078 | 1076 | pub fn contains_key( |
|
1079 | 1077 | &self, |
|
1080 | 1078 | key: &HgPath, |
|
1081 | 1079 | ) -> Result<bool, DirstateV2ParseError> { |
|
1082 | 1080 | Ok(self.get(key)?.is_some()) |
|
1083 | 1081 | } |
|
1084 | 1082 | |
|
1085 | 1083 | pub fn get( |
|
1086 | 1084 | &self, |
|
1087 | 1085 | key: &HgPath, |
|
1088 | 1086 | ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> { |
|
1089 | 1087 | let map = self.get_map(); |
|
1090 | 1088 | Ok(if let Some(node) = map.get_node(key)? { |
|
1091 | 1089 | node.entry()? |
|
1092 | 1090 | } else { |
|
1093 | 1091 | None |
|
1094 | 1092 | }) |
|
1095 | 1093 | } |
|
1096 | 1094 | |
|
1097 | 1095 | pub fn iter(&self) -> StateMapIter<'_> { |
|
1098 | 1096 | let map = self.get_map(); |
|
1099 | 1097 | Box::new(filter_map_results(map.iter_nodes(), move |node| { |
|
1100 | 1098 | Ok(if let Some(entry) = node.entry()? { |
|
1101 | 1099 | Some((node.full_path(map.on_disk)?, entry)) |
|
1102 | 1100 | } else { |
|
1103 | 1101 | None |
|
1104 | 1102 | }) |
|
1105 | 1103 | })) |
|
1106 | 1104 | } |
|
1107 | 1105 | |
|
1108 | 1106 | pub fn iter_tracked_dirs( |
|
1109 | 1107 | &mut self, |
|
1110 | 1108 | ) -> Result< |
|
1111 | 1109 | Box< |
|
1112 | 1110 | dyn Iterator<Item = Result<&HgPath, DirstateV2ParseError>> |
|
1113 | 1111 | + Send |
|
1114 | 1112 | + '_, |
|
1115 | 1113 | >, |
|
1116 | 1114 | DirstateError, |
|
1117 | 1115 | > { |
|
1118 | 1116 | let map = self.get_map_mut(); |
|
1119 | 1117 | let on_disk = map.on_disk; |
|
1120 | 1118 | Ok(Box::new(filter_map_results( |
|
1121 | 1119 | map.iter_nodes(), |
|
1122 | 1120 | move |node| { |
|
1123 | 1121 | Ok(if node.tracked_descendants_count() > 0 { |
|
1124 | 1122 | Some(node.full_path(on_disk)?) |
|
1125 | 1123 | } else { |
|
1126 | 1124 | None |
|
1127 | 1125 | }) |
|
1128 | 1126 | }, |
|
1129 | 1127 | ))) |
|
1130 | 1128 | } |
|
1131 | 1129 | |
|
1132 | 1130 | pub fn debug_iter( |
|
1133 | 1131 | &self, |
|
1134 | 1132 | all: bool, |
|
1135 | 1133 | ) -> Box< |
|
1136 | 1134 | dyn Iterator< |
|
1137 | 1135 | Item = Result< |
|
1138 | 1136 | (&HgPath, (u8, i32, i32, i32)), |
|
1139 | 1137 | DirstateV2ParseError, |
|
1140 | 1138 | >, |
|
1141 | 1139 | > + Send |
|
1142 | 1140 | + '_, |
|
1143 | 1141 | > { |
|
1144 | 1142 | let map = self.get_map(); |
|
1145 | 1143 | Box::new(filter_map_results(map.iter_nodes(), move |node| { |
|
1146 | 1144 | let debug_tuple = if let Some(entry) = node.entry()? { |
|
1147 | 1145 | entry.debug_tuple() |
|
1148 | 1146 | } else if !all { |
|
1149 | 1147 | return Ok(None); |
|
1150 | 1148 | } else if let Some(mtime) = node.cached_directory_mtime()? { |
|
1151 | 1149 | (b' ', 0, -1, mtime.truncated_seconds() as i32) |
|
1152 | 1150 | } else { |
|
1153 | 1151 | (b' ', 0, -1, -1) |
|
1154 | 1152 | }; |
|
1155 | 1153 | Ok(Some((node.full_path(map.on_disk)?, debug_tuple))) |
|
1156 | 1154 | })) |
|
1157 | 1155 | } |
|
1158 | 1156 | } |
@@ -1,132 +1,137 b'' | |||
|
1 | 1 | // Copyright 2018-2020 Georges Racinet <georges.racinet@octobus.net> |
|
2 | 2 | // and Mercurial contributors |
|
3 | 3 | // |
|
4 | 4 | // This software may be used and distributed according to the terms of the |
|
5 | 5 | // GNU General Public License version 2 or any later version. |
|
6 | 6 | |
|
7 | 7 | mod ancestors; |
|
8 | 8 | pub mod dagops; |
|
9 | 9 | pub mod errors; |
|
10 | 10 | pub use ancestors::{AncestorsIterator, MissingAncestors}; |
|
11 | 11 | pub mod dirstate; |
|
12 | 12 | pub mod dirstate_tree; |
|
13 | 13 | pub mod discovery; |
|
14 | 14 | pub mod exit_codes; |
|
15 | 15 | pub mod requirements; |
|
16 | 16 | pub mod testing; // unconditionally built, for use from integration tests |
|
17 | 17 | pub use dirstate::{ |
|
18 | 18 | dirs_multiset::{DirsMultiset, DirsMultisetIter}, |
|
19 | 19 | status::{ |
|
20 | 20 | BadMatch, BadType, DirstateStatus, HgPathCow, StatusError, |
|
21 | 21 | StatusOptions, |
|
22 | 22 | }, |
|
23 | 23 | DirstateEntry, DirstateParents, EntryState, |
|
24 | 24 | }; |
|
25 | 25 | pub mod copy_tracing; |
|
26 | 26 | mod filepatterns; |
|
27 | 27 | pub mod matchers; |
|
28 | 28 | pub mod repo; |
|
29 | 29 | pub mod revlog; |
|
30 | 30 | pub use revlog::*; |
|
31 | 31 | pub mod config; |
|
32 | 32 | pub mod lock; |
|
33 | 33 | pub mod logging; |
|
34 | 34 | pub mod operations; |
|
35 | 35 | pub mod revset; |
|
36 | 36 | pub mod utils; |
|
37 | 37 | pub mod vfs; |
|
38 | 38 | |
|
39 | 39 | use crate::utils::hg_path::{HgPathBuf, HgPathError}; |
|
40 | 40 | pub use filepatterns::{ |
|
41 | 41 | parse_pattern_syntax, read_pattern_file, IgnorePattern, |
|
42 | 42 | PatternFileWarning, PatternSyntax, |
|
43 | 43 | }; |
|
44 | 44 | use std::collections::HashMap; |
|
45 | 45 | use std::fmt; |
|
46 | 46 | use twox_hash::RandomXxHashBuilder64; |
|
47 | 47 | |
|
48 | 48 | /// This is a contract between the `micro-timer` crate and us, to expose |
|
49 | 49 | /// the `log` crate as `crate::log`. |
|
50 | 50 | use log; |
|
51 | 51 | |
|
52 | 52 | pub type LineNumber = usize; |
|
53 | 53 | |
|
54 | 54 | /// Rust's default hasher is too slow because it tries to prevent collision |
|
55 | 55 | /// attacks. We are not concerned about those: if an ill-minded person has |
|
56 | 56 | /// write access to your repository, you have other issues. |
|
57 | 57 | pub type FastHashMap<K, V> = HashMap<K, V, RandomXxHashBuilder64>; |
|
58 | 58 | |
|
59 | // TODO: should this be the default `FastHashMap` for all of hg-core, not just | |
|
60 | // dirstate_tree? How does XxHash compare with AHash, hashbrown’s default? | |
|
61 | pub type FastHashbrownMap<K, V> = | |
|
62 | hashbrown::HashMap<K, V, RandomXxHashBuilder64>; | |
|
63 | ||
|
59 | 64 | #[derive(Debug, PartialEq)] |
|
60 | 65 | pub enum DirstateMapError { |
|
61 | 66 | PathNotFound(HgPathBuf), |
|
62 | 67 | EmptyPath, |
|
63 | 68 | InvalidPath(HgPathError), |
|
64 | 69 | } |
|
65 | 70 | |
|
66 | 71 | impl fmt::Display for DirstateMapError { |
|
67 | 72 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
|
68 | 73 | match self { |
|
69 | 74 | DirstateMapError::PathNotFound(_) => { |
|
70 | 75 | f.write_str("expected a value, found none") |
|
71 | 76 | } |
|
72 | 77 | DirstateMapError::EmptyPath => { |
|
73 | 78 | f.write_str("Overflow in dirstate.") |
|
74 | 79 | } |
|
75 | 80 | DirstateMapError::InvalidPath(path_error) => path_error.fmt(f), |
|
76 | 81 | } |
|
77 | 82 | } |
|
78 | 83 | } |
|
79 | 84 | |
|
80 | 85 | #[derive(Debug, derive_more::From)] |
|
81 | 86 | pub enum DirstateError { |
|
82 | 87 | Map(DirstateMapError), |
|
83 | 88 | Common(errors::HgError), |
|
84 | 89 | } |
|
85 | 90 | |
|
86 | 91 | impl fmt::Display for DirstateError { |
|
87 | 92 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
|
88 | 93 | match self { |
|
89 | 94 | DirstateError::Map(error) => error.fmt(f), |
|
90 | 95 | DirstateError::Common(error) => error.fmt(f), |
|
91 | 96 | } |
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92 | 97 | } |
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93 | 98 | } |
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94 | 99 | |
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95 | 100 | #[derive(Debug, derive_more::From)] |
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96 | 101 | pub enum PatternError { |
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97 | 102 | #[from] |
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98 | 103 | Path(HgPathError), |
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99 | 104 | UnsupportedSyntax(String), |
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100 | 105 | UnsupportedSyntaxInFile(String, String, usize), |
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101 | 106 | TooLong(usize), |
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102 | 107 | #[from] |
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103 | 108 | IO(std::io::Error), |
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104 | 109 | /// Needed a pattern that can be turned into a regex but got one that |
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105 | 110 | /// can't. This should only happen through programmer error. |
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106 | 111 | NonRegexPattern(IgnorePattern), |
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107 | 112 | } |
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108 | 113 | |
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109 | 114 | impl fmt::Display for PatternError { |
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110 | 115 | fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { |
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111 | 116 | match self { |
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112 | 117 | PatternError::UnsupportedSyntax(syntax) => { |
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113 | 118 | write!(f, "Unsupported syntax {}", syntax) |
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114 | 119 | } |
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115 | 120 | PatternError::UnsupportedSyntaxInFile(syntax, file_path, line) => { |
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116 | 121 | write!( |
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117 | 122 | f, |
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118 | 123 | "{}:{}: unsupported syntax {}", |
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119 | 124 | file_path, line, syntax |
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120 | 125 | ) |
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121 | 126 | } |
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122 | 127 | PatternError::TooLong(size) => { |
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123 | 128 | write!(f, "matcher pattern is too long ({} bytes)", size) |
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124 | 129 | } |
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125 | 130 | PatternError::IO(error) => error.fmt(f), |
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126 | 131 | PatternError::Path(error) => error.fmt(f), |
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127 | 132 | PatternError::NonRegexPattern(pattern) => { |
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128 | 133 | write!(f, "'{:?}' cannot be turned into a regex", pattern) |
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129 | 134 | } |
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130 | 135 | } |
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131 | 136 | } |
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132 | 137 | } |
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