Mercurial > hg
annotate rust/hg-core/src/dirstate/status.rs @ 45111:7528699c6ccb
rust-status: refactor status into a struct
The code for `dirstate/status` has grown too large for comfort, this is the
first of three patches that try to improve maintainability.
In this patch, refactoring dirstate's status into a struct allows for slimming
down function signatures drastically, keeping the mental (and maintenance)
burden lower, since pretty much all of them shared a few common arguments.
This had the pleasant side-effect of simplifying lifetimes a little. This has
no observable impact on performance.
The next patch will add/improve documentation and refactor some types. I tried
to keep new code down to a minimum in this patch because it's already pretty
big.
Differential Revision: https://phab.mercurial-scm.org/D8661
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Wed, 24 Jun 2020 16:12:45 +0200 |
parents | 26114bd6ec60 |
children | 470d306e616c |
rev | line source |
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1 // status.rs |
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2 // |
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3 // Copyright 2019 Raphaël Gomès <rgomes@octobus.net> |
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4 // |
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5 // This software may be used and distributed according to the terms of the |
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6 // GNU General Public License version 2 or any later version. |
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7 |
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8 //! Rust implementation of dirstate.status (dirstate.py). |
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9 //! It is currently missing a lot of functionality compared to the Python one |
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10 //! and will only be triggered in narrow cases. |
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11 |
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12 use crate::{ |
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13 dirstate::SIZE_FROM_OTHER_PARENT, |
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14 filepatterns::PatternFileWarning, |
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15 matchers::{get_ignore_function, Matcher, VisitChildrenSet}, |
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16 utils::{ |
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17 files::{find_dirs, HgMetadata}, |
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18 hg_path::{ |
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19 hg_path_to_path_buf, os_string_to_hg_path_buf, HgPath, HgPathBuf, |
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20 HgPathError, |
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21 }, |
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22 path_auditor::PathAuditor, |
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23 }, |
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24 CopyMap, DirstateEntry, DirstateMap, EntryState, FastHashMap, |
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25 PatternError, |
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26 }; |
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27 use lazy_static::lazy_static; |
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28 use micro_timer::timed; |
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29 use rayon::prelude::*; |
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30 use std::{ |
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31 borrow::Cow, |
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32 collections::HashSet, |
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33 fs::{read_dir, DirEntry}, |
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34 io::ErrorKind, |
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35 ops::Deref, |
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36 path::{Path, PathBuf}, |
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37 }; |
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38 |
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39 /// Wrong type of file from a `BadMatch` |
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40 /// Note: a lot of those don't exist on all platforms. |
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41 #[derive(Debug, Copy, Clone)] |
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42 pub enum BadType { |
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43 CharacterDevice, |
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44 BlockDevice, |
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45 FIFO, |
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46 Socket, |
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47 Directory, |
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48 Unknown, |
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49 } |
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50 |
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51 impl ToString for BadType { |
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52 fn to_string(&self) -> String { |
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53 match self { |
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54 BadType::CharacterDevice => "character device", |
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55 BadType::BlockDevice => "block device", |
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56 BadType::FIFO => "fifo", |
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57 BadType::Socket => "socket", |
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58 BadType::Directory => "directory", |
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59 BadType::Unknown => "unknown", |
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60 } |
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61 .to_string() |
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62 } |
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63 } |
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64 |
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65 /// Was explicitly matched but cannot be found/accessed |
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66 #[derive(Debug, Copy, Clone)] |
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67 pub enum BadMatch { |
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68 OsError(i32), |
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69 BadType(BadType), |
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70 } |
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71 |
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72 /// Marker enum used to dispatch new status entries into the right collections. |
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73 /// Is similar to `crate::EntryState`, but represents the transient state of |
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74 /// entries during the lifetime of a command. |
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75 #[derive(Debug, Copy, Clone)] |
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76 pub enum Dispatch { |
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77 Unsure, |
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78 Modified, |
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79 Added, |
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80 Removed, |
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81 Deleted, |
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82 Clean, |
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83 Unknown, |
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84 Ignored, |
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85 /// Empty dispatch, the file is not worth listing |
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86 None, |
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87 /// Was explicitly matched but cannot be found/accessed |
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88 Bad(BadMatch), |
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89 Directory { |
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90 /// True if the directory used to be a file in the dmap so we can say |
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91 /// that it's been removed. |
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92 was_file: bool, |
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93 }, |
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94 } |
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95 |
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96 type IoResult<T> = std::io::Result<T>; |
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97 /// `Box<dyn Trait>` is syntactic sugar for `Box<dyn Trait, 'static>`, so add |
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98 /// an explicit lifetime here to not fight `'static` bounds "out of nowhere". |
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99 type IgnoreFnType<'a> = Box<dyn for<'r> Fn(&'r HgPath) -> bool + Sync + 'a>; |
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100 |
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101 /// Dates and times that are outside the 31-bit signed range are compared |
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102 /// modulo 2^31. This should prevent hg from behaving badly with very large |
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103 /// files or corrupt dates while still having a high probability of detecting |
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104 /// changes. (issue2608) |
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105 /// TODO I haven't found a way of having `b` be `Into<i32>`, since `From<u64>` |
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106 /// is not defined for `i32`, and there is no `As` trait. This forces the |
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107 /// caller to cast `b` as `i32`. |
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108 fn mod_compare(a: i32, b: i32) -> bool { |
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109 a & i32::max_value() != b & i32::max_value() |
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110 } |
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111 |
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112 /// Return a sorted list containing information about the entries |
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113 /// in the directory. |
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114 /// |
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115 /// * `skip_dot_hg` - Return an empty vec if `path` contains a `.hg` directory |
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116 fn list_directory( |
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117 path: impl AsRef<Path>, |
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118 skip_dot_hg: bool, |
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119 ) -> std::io::Result<Vec<(HgPathBuf, DirEntry)>> { |
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120 let mut results = vec![]; |
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121 let entries = read_dir(path.as_ref())?; |
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122 |
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123 for entry in entries { |
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124 let entry = entry?; |
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125 let filename = os_string_to_hg_path_buf(entry.file_name())?; |
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126 let file_type = entry.file_type()?; |
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127 if skip_dot_hg && filename.as_bytes() == b".hg" && file_type.is_dir() { |
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128 return Ok(vec![]); |
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129 } else { |
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130 results.push((filename, entry)) |
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131 } |
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132 } |
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133 |
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134 results.sort_unstable_by_key(|e| e.0.clone()); |
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135 Ok(results) |
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136 } |
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137 |
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138 /// The file corresponding to the dirstate entry was found on the filesystem. |
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139 fn dispatch_found( |
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140 filename: impl AsRef<HgPath>, |
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141 entry: DirstateEntry, |
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142 metadata: HgMetadata, |
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143 copy_map: &CopyMap, |
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144 options: StatusOptions, |
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145 ) -> Dispatch { |
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146 let DirstateEntry { |
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147 state, |
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148 mode, |
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149 mtime, |
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150 size, |
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151 } = entry; |
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152 |
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153 let HgMetadata { |
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154 st_mode, |
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155 st_size, |
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156 st_mtime, |
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157 .. |
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158 } = metadata; |
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159 |
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160 match state { |
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161 EntryState::Normal => { |
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162 let size_changed = mod_compare(size, st_size as i32); |
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163 let mode_changed = |
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164 (mode ^ st_mode as i32) & 0o100 != 0o000 && options.check_exec; |
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165 let metadata_changed = size >= 0 && (size_changed || mode_changed); |
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166 let other_parent = size == SIZE_FROM_OTHER_PARENT; |
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167 |
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168 if metadata_changed |
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169 || other_parent |
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170 || copy_map.contains_key(filename.as_ref()) |
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171 { |
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172 Dispatch::Modified |
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173 } else if mod_compare(mtime, st_mtime as i32) |
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174 || st_mtime == options.last_normal_time |
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175 { |
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176 // the file may have just been marked as normal and |
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177 // it may have changed in the same second without |
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178 // changing its size. This can happen if we quickly |
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179 // do multiple commits. Force lookup, so we don't |
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180 // miss such a racy file change. |
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181 Dispatch::Unsure |
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182 } else if options.list_clean { |
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183 Dispatch::Clean |
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184 } else { |
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185 Dispatch::None |
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186 } |
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187 } |
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188 EntryState::Merged => Dispatch::Modified, |
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189 EntryState::Added => Dispatch::Added, |
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190 EntryState::Removed => Dispatch::Removed, |
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191 EntryState::Unknown => Dispatch::Unknown, |
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192 } |
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193 } |
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194 |
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195 /// The file corresponding to this Dirstate entry is missing. |
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196 fn dispatch_missing(state: EntryState) -> Dispatch { |
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197 match state { |
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198 // File was removed from the filesystem during commands |
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199 EntryState::Normal | EntryState::Merged | EntryState::Added => { |
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200 Dispatch::Deleted |
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201 } |
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202 // File was removed, everything is normal |
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203 EntryState::Removed => Dispatch::Removed, |
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204 // File is unknown to Mercurial, everything is normal |
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205 EntryState::Unknown => Dispatch::Unknown, |
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206 } |
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207 } |
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208 |
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209 lazy_static! { |
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210 static ref DEFAULT_WORK: HashSet<&'static HgPath> = { |
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211 let mut h = HashSet::new(); |
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212 h.insert(HgPath::new(b"")); |
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213 h |
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214 }; |
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215 } |
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216 |
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217 #[derive(Debug, Copy, Clone)] |
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218 pub struct StatusOptions { |
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219 /// Remember the most recent modification timeslot for status, to make |
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220 /// sure we won't miss future size-preserving file content modifications |
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221 /// that happen within the same timeslot. |
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222 pub last_normal_time: i64, |
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223 /// Whether we are on a filesystem with UNIX-like exec flags |
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224 pub check_exec: bool, |
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225 pub list_clean: bool, |
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226 pub list_unknown: bool, |
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227 pub list_ignored: bool, |
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228 /// Whether to collect traversed dirs for applying a callback later. |
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229 /// Used by `hg purge` for example. |
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230 pub collect_traversed_dirs: bool, |
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231 } |
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232 |
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233 #[derive(Debug)] |
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234 pub struct DirstateStatus<'a> { |
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235 pub modified: Vec<Cow<'a, HgPath>>, |
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236 pub added: Vec<Cow<'a, HgPath>>, |
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237 pub removed: Vec<Cow<'a, HgPath>>, |
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238 pub deleted: Vec<Cow<'a, HgPath>>, |
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239 pub clean: Vec<Cow<'a, HgPath>>, |
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240 pub ignored: Vec<Cow<'a, HgPath>>, |
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241 pub unknown: Vec<Cow<'a, HgPath>>, |
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242 pub bad: Vec<(Cow<'a, HgPath>, BadMatch)>, |
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243 /// Only filled if `collect_traversed_dirs` is `true` |
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244 pub traversed: Vec<HgPathBuf>, |
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245 } |
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246 |
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247 #[derive(Debug)] |
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248 pub enum StatusError { |
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249 IO(std::io::Error), |
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250 Path(HgPathError), |
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251 Pattern(PatternError), |
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252 } |
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253 |
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254 pub type StatusResult<T> = Result<T, StatusError>; |
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255 |
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256 impl From<PatternError> for StatusError { |
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257 fn from(e: PatternError) -> Self { |
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258 StatusError::Pattern(e) |
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259 } |
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260 } |
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261 impl From<HgPathError> for StatusError { |
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262 fn from(e: HgPathError) -> Self { |
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263 StatusError::Path(e) |
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264 } |
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265 } |
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266 impl From<std::io::Error> for StatusError { |
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267 fn from(e: std::io::Error) -> Self { |
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268 StatusError::IO(e) |
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269 } |
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270 } |
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271 |
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272 impl ToString for StatusError { |
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273 fn to_string(&self) -> String { |
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274 match self { |
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275 StatusError::IO(e) => e.to_string(), |
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276 StatusError::Path(e) => e.to_string(), |
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277 StatusError::Pattern(e) => e.to_string(), |
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278 } |
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279 } |
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280 } |
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281 |
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282 pub struct Status<'a, M: Matcher + Sync> { |
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283 dmap: &'a DirstateMap, |
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284 matcher: &'a M, |
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285 root_dir: PathBuf, |
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286 options: StatusOptions, |
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287 ignore_fn: IgnoreFnType<'a>, |
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288 } |
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289 |
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290 impl<'a, M> Status<'a, M> |
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291 where |
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292 M: Matcher + Sync, |
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293 { |
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294 pub fn new( |
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295 dmap: &'a DirstateMap, |
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296 matcher: &'a M, |
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297 root_dir: PathBuf, |
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298 ignore_files: Vec<PathBuf>, |
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299 options: StatusOptions, |
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300 ) -> StatusResult<(Self, Vec<PatternFileWarning>)> { |
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301 // Needs to outlive `dir_ignore_fn` since it's captured. |
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302 |
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303 let (ignore_fn, warnings): (IgnoreFnType, _) = |
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304 if options.list_ignored || options.list_unknown { |
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305 get_ignore_function(ignore_files, &root_dir)? |
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306 } else { |
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307 (Box::new(|&_| true), vec![]) |
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308 }; |
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309 |
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310 Ok(( |
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311 Self { |
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312 dmap, |
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313 matcher, |
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314 root_dir, |
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315 options, |
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316 ignore_fn, |
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317 }, |
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318 warnings, |
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319 )) |
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320 } |
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321 |
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322 pub fn is_ignored(&self, path: impl AsRef<HgPath>) -> bool { |
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323 (self.ignore_fn)(path.as_ref()) |
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324 } |
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325 |
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326 /// Is the path or one of its ancestors ignored? |
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327 pub fn dir_ignore(&self, dir: impl AsRef<HgPath>) -> bool { |
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328 // Only involve ignore mechanism if we're listing unknowns or ignored. |
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329 if self.options.list_ignored || self.options.list_unknown { |
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330 if self.is_ignored(&dir) { |
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331 true |
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332 } else { |
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333 for p in find_dirs(dir.as_ref()) { |
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334 if self.is_ignored(p) { |
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335 return true; |
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336 } |
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337 } |
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338 false |
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339 } |
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340 } else { |
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341 true |
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342 } |
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343 } |
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344 |
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345 /// Get stat data about the files explicitly specified by match. |
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346 /// TODO subrepos |
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347 #[timed] |
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348 pub fn walk_explicit( |
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349 &self, |
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350 traversed_sender: crossbeam::Sender<HgPathBuf>, |
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351 ) -> ( |
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352 Vec<(Cow<'a, HgPath>, Dispatch)>, |
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353 Vec<(Cow<'a, HgPath>, Dispatch)>, |
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354 ) { |
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355 self.matcher |
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356 .file_set() |
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357 .unwrap_or(&DEFAULT_WORK) |
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358 .par_iter() |
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359 .map(|&filename| -> Option<IoResult<_>> { |
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360 // TODO normalization |
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361 let normalized = filename; |
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362 |
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363 let buf = match hg_path_to_path_buf(normalized) { |
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364 Ok(x) => x, |
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365 Err(e) => return Some(Err(e.into())), |
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366 }; |
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367 let target = self.root_dir.join(buf); |
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368 let st = target.symlink_metadata(); |
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369 let in_dmap = self.dmap.get(normalized); |
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370 match st { |
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371 Ok(meta) => { |
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372 let file_type = meta.file_type(); |
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373 return if file_type.is_file() || file_type.is_symlink() |
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374 { |
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375 if let Some(entry) = in_dmap { |
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376 return Some(Ok(( |
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377 Cow::Borrowed(normalized), |
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378 dispatch_found( |
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379 &normalized, |
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380 *entry, |
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381 HgMetadata::from_metadata(meta), |
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382 &self.dmap.copy_map, |
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383 self.options, |
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384 ), |
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385 ))); |
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386 } |
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387 Some(Ok(( |
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388 Cow::Borrowed(normalized), |
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389 Dispatch::Unknown, |
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390 ))) |
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391 } else if file_type.is_dir() { |
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392 if self.options.collect_traversed_dirs { |
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393 traversed_sender |
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394 .send(normalized.to_owned()) |
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395 .expect("receiver should outlive sender"); |
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396 } |
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397 Some(Ok(( |
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398 Cow::Borrowed(normalized), |
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399 Dispatch::Directory { |
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400 was_file: in_dmap.is_some(), |
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401 }, |
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402 ))) |
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403 } else { |
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404 Some(Ok(( |
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405 Cow::Borrowed(normalized), |
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406 Dispatch::Bad(BadMatch::BadType( |
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407 // TODO do more than unknown |
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408 // Support for all `BadType` variant |
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409 // varies greatly between platforms. |
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410 // So far, no tests check the type and |
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411 // this should be good enough for most |
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412 // users. |
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413 BadType::Unknown, |
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414 )), |
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415 ))) |
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416 }; |
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417 } |
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418 Err(_) => { |
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419 if let Some(entry) = in_dmap { |
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420 return Some(Ok(( |
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421 Cow::Borrowed(normalized), |
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422 dispatch_missing(entry.state), |
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423 ))); |
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424 } |
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425 } |
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426 }; |
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427 None |
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428 }) |
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429 .flatten() |
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430 .filter_map(Result::ok) |
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431 .partition(|(_, dispatch)| match dispatch { |
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432 Dispatch::Directory { .. } => true, |
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433 _ => false, |
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434 }) |
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435 } |
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436 |
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437 /// Walk the working directory recursively to look for changes compared to |
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438 /// the current `DirstateMap`. |
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439 /// |
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440 /// This takes a mutable reference to the results to account for the |
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441 /// `extend` in timings |
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442 #[timed] |
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443 pub fn traverse( |
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444 &self, |
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445 path: impl AsRef<HgPath>, |
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446 old_results: &FastHashMap<Cow<'a, HgPath>, Dispatch>, |
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447 results: &mut Vec<(Cow<'a, HgPath>, Dispatch)>, |
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448 traversed_sender: crossbeam::Sender<HgPathBuf>, |
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449 ) -> IoResult<()> { |
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450 // The traversal is done in parallel, so use a channel to gather |
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451 // entries. `crossbeam::Sender` is `Sync`, while `mpsc::Sender` |
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452 // is not. |
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453 let (files_transmitter, files_receiver) = |
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454 crossbeam::channel::unbounded(); |
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455 |
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456 self.traverse_dir( |
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457 &files_transmitter, |
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458 path, |
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459 &old_results, |
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460 traversed_sender, |
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461 )?; |
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462 |
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463 // Disconnect the channel so the receiver stops waiting |
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464 drop(files_transmitter); |
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465 |
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466 // TODO don't collect. Find a way of replicating the behavior of |
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467 // `itertools::process_results`, but for `rayon::ParallelIterator` |
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468 let new_results: IoResult<Vec<(Cow<HgPath>, Dispatch)>> = |
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469 files_receiver |
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470 .into_iter() |
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471 .map(|item| { |
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472 let (f, d) = item?; |
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473 Ok((Cow::Owned(f), d)) |
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474 }) |
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475 .collect(); |
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476 |
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477 results.par_extend(new_results?); |
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478 |
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479 Ok(()) |
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480 } |
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481 |
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482 /// Dispatch a single entry (file, folder, symlink...) found during |
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483 /// `traverse`. If the entry is a folder that needs to be traversed, it |
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484 /// will be handled in a separate thread. |
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485 fn handle_traversed_entry<'b>( |
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486 &'a self, |
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487 scope: &rayon::Scope<'b>, |
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488 files_sender: &'b crossbeam::Sender<IoResult<(HgPathBuf, Dispatch)>>, |
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489 old_results: &'a FastHashMap<Cow<HgPath>, Dispatch>, |
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490 filename: HgPathBuf, |
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491 dir_entry: DirEntry, |
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492 traversed_sender: crossbeam::Sender<HgPathBuf>, |
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493 ) -> IoResult<()> |
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494 where |
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495 'a: 'b, |
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496 { |
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497 let file_type = dir_entry.file_type()?; |
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498 let entry_option = self.dmap.get(&filename); |
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499 |
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500 if filename.as_bytes() == b".hg" { |
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501 // Could be a directory or a symlink |
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502 return Ok(()); |
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503 } |
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504 |
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505 if file_type.is_dir() { |
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506 self.handle_traversed_dir( |
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507 scope, |
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508 files_sender, |
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509 old_results, |
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510 entry_option, |
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511 filename, |
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512 traversed_sender, |
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513 ); |
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514 } else if file_type.is_file() || file_type.is_symlink() { |
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515 if let Some(entry) = entry_option { |
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516 if self.matcher.matches_everything() |
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517 || self.matcher.matches(&filename) |
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518 { |
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519 let metadata = dir_entry.metadata()?; |
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520 files_sender |
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521 .send(Ok(( |
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522 filename.to_owned(), |
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523 dispatch_found( |
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524 &filename, |
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525 *entry, |
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526 HgMetadata::from_metadata(metadata), |
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527 &self.dmap.copy_map, |
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528 self.options, |
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529 ), |
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530 ))) |
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531 .unwrap(); |
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532 } |
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533 } else if (self.matcher.matches_everything() |
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534 || self.matcher.matches(&filename)) |
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535 && !self.is_ignored(&filename) |
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536 { |
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537 if (self.options.list_ignored |
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538 || self.matcher.exact_match(&filename)) |
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539 && self.dir_ignore(&filename) |
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540 { |
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541 if self.options.list_ignored { |
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542 files_sender |
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543 .send(Ok((filename.to_owned(), Dispatch::Ignored))) |
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544 .unwrap(); |
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545 } |
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546 } else if self.options.list_unknown { |
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547 files_sender |
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548 .send(Ok((filename.to_owned(), Dispatch::Unknown))) |
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549 .unwrap(); |
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550 } |
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551 } else if self.is_ignored(&filename) && self.options.list_ignored { |
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552 files_sender |
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553 .send(Ok((filename.to_owned(), Dispatch::Ignored))) |
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554 .unwrap(); |
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555 } |
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556 } else if let Some(entry) = entry_option { |
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557 // Used to be a file or a folder, now something else. |
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558 if self.matcher.matches_everything() |
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559 || self.matcher.matches(&filename) |
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560 { |
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561 files_sender |
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562 .send(Ok(( |
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563 filename.to_owned(), |
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564 dispatch_missing(entry.state), |
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565 ))) |
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566 .unwrap(); |
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567 } |
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568 } |
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569 |
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570 Ok(()) |
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571 } |
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572 |
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573 /// A directory was found in the filesystem and needs to be traversed |
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574 fn handle_traversed_dir<'b>( |
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575 &'a self, |
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576 scope: &rayon::Scope<'b>, |
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577 files_sender: &'b crossbeam::Sender<IoResult<(HgPathBuf, Dispatch)>>, |
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578 old_results: &'a FastHashMap<Cow<HgPath>, Dispatch>, |
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579 entry_option: Option<&'a DirstateEntry>, |
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580 directory: HgPathBuf, |
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581 traversed_sender: crossbeam::Sender<HgPathBuf>, |
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582 ) where |
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583 'a: 'b, |
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584 { |
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585 scope.spawn(move |_| { |
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586 // Nested `if` until `rust-lang/rust#53668` is stable |
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587 if let Some(entry) = entry_option { |
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588 // Used to be a file, is now a folder |
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589 if self.matcher.matches_everything() |
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590 || self.matcher.matches(&directory) |
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591 { |
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592 files_sender |
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593 .send(Ok(( |
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594 directory.to_owned(), |
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595 dispatch_missing(entry.state), |
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596 ))) |
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597 .unwrap(); |
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598 } |
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599 } |
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600 // Do we need to traverse it? |
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601 if !self.is_ignored(&directory) || self.options.list_ignored { |
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602 self.traverse_dir( |
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603 files_sender, |
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604 directory, |
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605 &old_results, |
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606 traversed_sender, |
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607 ) |
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608 .unwrap_or_else(|e| files_sender.send(Err(e)).unwrap()) |
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609 } |
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610 }); |
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611 } |
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612 |
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613 /// Decides whether the directory needs to be listed, and if so handles the |
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614 /// entries in a separate thread. |
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615 fn traverse_dir( |
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616 &self, |
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617 files_sender: &crossbeam::Sender<IoResult<(HgPathBuf, Dispatch)>>, |
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618 directory: impl AsRef<HgPath>, |
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619 old_results: &FastHashMap<Cow<HgPath>, Dispatch>, |
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620 traversed_sender: crossbeam::Sender<HgPathBuf>, |
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621 ) -> IoResult<()> { |
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622 let directory = directory.as_ref(); |
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623 |
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624 if self.options.collect_traversed_dirs { |
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625 traversed_sender |
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626 .send(directory.to_owned()) |
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627 .expect("receiver should outlive sender"); |
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628 } |
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629 |
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630 let visit_entries = match self.matcher.visit_children_set(directory) { |
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631 VisitChildrenSet::Empty => return Ok(()), |
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632 VisitChildrenSet::This | VisitChildrenSet::Recursive => None, |
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633 VisitChildrenSet::Set(set) => Some(set), |
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634 }; |
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635 let buf = hg_path_to_path_buf(directory)?; |
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636 let dir_path = self.root_dir.join(buf); |
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637 |
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638 let skip_dot_hg = !directory.as_bytes().is_empty(); |
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639 let entries = match list_directory(dir_path, skip_dot_hg) { |
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640 Err(e) => match e.kind() { |
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641 ErrorKind::NotFound | ErrorKind::PermissionDenied => { |
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642 files_sender |
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643 .send(Ok(( |
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644 directory.to_owned(), |
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645 Dispatch::Bad(BadMatch::OsError( |
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646 // Unwrapping here is OK because the error |
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647 // always is a |
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648 // real os error |
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649 e.raw_os_error().unwrap(), |
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650 )), |
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651 ))) |
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652 .unwrap(); |
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653 return Ok(()); |
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654 } |
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655 _ => return Err(e), |
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656 }, |
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657 Ok(entries) => entries, |
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658 }; |
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659 |
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660 rayon::scope(|scope| -> IoResult<()> { |
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661 for (filename, dir_entry) in entries { |
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662 if let Some(ref set) = visit_entries { |
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663 if !set.contains(filename.deref()) { |
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664 continue; |
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665 } |
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666 } |
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667 // TODO normalize |
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668 let filename = if directory.is_empty() { |
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669 filename.to_owned() |
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670 } else { |
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671 directory.join(&filename) |
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672 }; |
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673 |
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674 if !old_results.contains_key(filename.deref()) { |
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675 self.handle_traversed_entry( |
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676 scope, |
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677 files_sender, |
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678 old_results, |
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679 filename, |
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680 dir_entry, |
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681 traversed_sender.clone(), |
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682 )?; |
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683 } |
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684 } |
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685 Ok(()) |
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686 }) |
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687 } |
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688 |
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689 /// This takes a mutable reference to the results to account for the |
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690 /// `extend` in timings |
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691 #[timed] |
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692 fn handle_unknowns( |
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693 &self, |
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694 results: &mut Vec<(Cow<'a, HgPath>, Dispatch)>, |
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695 ) -> IoResult<()> { |
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696 let to_visit: Vec<(&HgPath, &DirstateEntry)> = |
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697 if results.is_empty() && self.matcher.matches_everything() { |
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698 self.dmap.iter().map(|(f, e)| (f.deref(), e)).collect() |
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699 } else { |
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700 // Only convert to a hashmap if needed. |
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701 let old_results: FastHashMap<_, _> = |
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702 results.iter().cloned().collect(); |
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703 self.dmap |
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704 .iter() |
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705 .filter_map(move |(f, e)| { |
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706 if !old_results.contains_key(f.deref()) |
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707 && self.matcher.matches(f) |
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708 { |
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709 Some((f.deref(), e)) |
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710 } else { |
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711 None |
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712 } |
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713 }) |
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714 .collect() |
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715 }; |
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716 |
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717 // We walked all dirs under the roots that weren't ignored, and |
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718 // everything that matched was stat'ed and is already in results. |
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719 // The rest must thus be ignored or under a symlink. |
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720 let path_auditor = PathAuditor::new(&self.root_dir); |
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721 |
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722 // TODO don't collect. Find a way of replicating the behavior of |
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723 // `itertools::process_results`, but for `rayon::ParallelIterator` |
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724 let new_results: IoResult<Vec<_>> = to_visit |
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725 .into_par_iter() |
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726 .filter_map(|(filename, entry)| -> Option<IoResult<_>> { |
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727 // Report ignored items in the dmap as long as they are not |
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728 // under a symlink directory. |
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729 if path_auditor.check(filename) { |
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730 // TODO normalize for case-insensitive filesystems |
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731 let buf = match hg_path_to_path_buf(filename) { |
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732 Ok(x) => x, |
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733 Err(e) => return Some(Err(e.into())), |
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734 }; |
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735 Some(Ok(( |
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736 Cow::Borrowed(filename), |
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737 match self.root_dir.join(&buf).symlink_metadata() { |
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738 // File was just ignored, no links, and exists |
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739 Ok(meta) => { |
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740 let metadata = HgMetadata::from_metadata(meta); |
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741 dispatch_found( |
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742 filename, |
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743 *entry, |
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744 metadata, |
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745 &self.dmap.copy_map, |
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746 self.options, |
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747 ) |
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748 } |
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749 // File doesn't exist |
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750 Err(_) => dispatch_missing(entry.state), |
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751 }, |
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752 ))) |
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753 } else { |
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754 // It's either missing or under a symlink directory which |
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755 // we, in this case, report as missing. |
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756 Some(Ok(( |
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757 Cow::Borrowed(filename), |
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758 dispatch_missing(entry.state), |
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759 ))) |
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760 } |
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761 }) |
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762 .collect(); |
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763 |
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764 results.par_extend(new_results?); |
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765 |
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766 Ok(()) |
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767 } |
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768 |
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769 /// This takes a mutable reference to the results to account for the |
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770 /// `extend` in timings |
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771 #[timed] |
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772 fn extend_from_dmap( |
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773 &self, |
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774 results: &mut Vec<(Cow<'a, HgPath>, Dispatch)>, |
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775 ) { |
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776 results.par_extend(self.dmap.par_iter().flat_map( |
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777 move |(filename, entry)| { |
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778 let filename: &HgPath = filename; |
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779 let filename_as_path = hg_path_to_path_buf(filename)?; |
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780 let meta = |
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781 self.root_dir.join(filename_as_path).symlink_metadata(); |
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782 |
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783 match meta { |
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784 Ok(ref m) |
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785 if !(m.file_type().is_file() |
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786 || m.file_type().is_symlink()) => |
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787 { |
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788 Ok(( |
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789 Cow::Borrowed(filename), |
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790 dispatch_missing(entry.state), |
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791 )) |
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792 } |
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793 Ok(m) => Ok(( |
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794 Cow::Borrowed(filename), |
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795 dispatch_found( |
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796 filename, |
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797 *entry, |
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798 HgMetadata::from_metadata(m), |
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799 &self.dmap.copy_map, |
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800 self.options, |
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801 ), |
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802 )), |
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803 Err(ref e) |
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804 if e.kind() == ErrorKind::NotFound |
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805 || e.raw_os_error() == Some(20) => |
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806 { |
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807 // Rust does not yet have an `ErrorKind` for |
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808 // `NotADirectory` (errno 20) |
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809 // It happens if the dirstate contains `foo/bar` |
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810 // and foo is not a |
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811 // directory |
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812 Ok(( |
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813 Cow::Borrowed(filename), |
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814 dispatch_missing(entry.state), |
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815 )) |
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816 } |
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817 Err(e) => Err(e), |
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818 } |
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819 }, |
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820 )); |
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821 } |
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822 } |
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823 |
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824 #[timed] |
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825 fn build_response<'a>( |
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826 results: impl IntoIterator<Item = (Cow<'a, HgPath>, Dispatch)>, |
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827 traversed: Vec<HgPathBuf>, |
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828 ) -> (Vec<Cow<'a, HgPath>>, DirstateStatus<'a>) { |
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829 let mut lookup = vec![]; |
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830 let mut modified = vec![]; |
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831 let mut added = vec![]; |
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832 let mut removed = vec![]; |
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833 let mut deleted = vec![]; |
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834 let mut clean = vec![]; |
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835 let mut ignored = vec![]; |
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836 let mut unknown = vec![]; |
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837 let mut bad = vec![]; |
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838 |
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839 for (filename, dispatch) in results.into_iter() { |
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840 match dispatch { |
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841 Dispatch::Unknown => unknown.push(filename), |
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842 Dispatch::Unsure => lookup.push(filename), |
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843 Dispatch::Modified => modified.push(filename), |
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844 Dispatch::Added => added.push(filename), |
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845 Dispatch::Removed => removed.push(filename), |
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846 Dispatch::Deleted => deleted.push(filename), |
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847 Dispatch::Clean => clean.push(filename), |
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848 Dispatch::Ignored => ignored.push(filename), |
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849 Dispatch::None => {} |
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850 Dispatch::Bad(reason) => bad.push((filename, reason)), |
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851 Dispatch::Directory { .. } => {} |
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852 } |
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853 } |
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854 |
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855 ( |
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856 lookup, |
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857 DirstateStatus { |
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858 modified, |
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859 added, |
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860 removed, |
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861 deleted, |
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862 clean, |
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863 ignored, |
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864 unknown, |
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865 bad, |
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866 traversed, |
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867 }, |
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868 ) |
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869 } |
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870 |
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871 /// Get the status of files in the working directory. |
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872 /// |
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873 /// This is the current entry-point for `hg-core` and is realistically unusable |
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874 /// outside of a Python context because its arguments need to provide a lot of |
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875 /// information that will not be necessary in the future. |
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876 #[timed] |
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877 pub fn status<'a>( |
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878 dmap: &'a DirstateMap, |
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879 matcher: &'a (impl Matcher + Sync), |
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880 root_dir: PathBuf, |
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881 ignore_files: Vec<PathBuf>, |
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882 options: StatusOptions, |
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883 ) -> StatusResult<( |
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884 (Vec<Cow<'a, HgPath>>, DirstateStatus<'a>), |
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885 Vec<PatternFileWarning>, |
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886 )> { |
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887 let (traversed_sender, traversed_receiver) = |
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888 crossbeam::channel::unbounded(); |
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889 let (st, warnings) = |
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890 Status::new(dmap, matcher, root_dir, ignore_files, options)?; |
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891 |
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892 // Step 1: check the files explicitly mentioned by the user |
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893 let (work, mut results) = st.walk_explicit(traversed_sender.clone()); |
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894 |
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895 if !work.is_empty() { |
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896 // Hashmaps are quite a bit slower to build than vecs, so only build it |
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897 // if needed. |
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898 let old_results = results.iter().cloned().collect(); |
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899 |
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900 // Step 2: recursively check the working directory for changes if |
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901 // needed |
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902 for (dir, dispatch) in work { |
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903 match dispatch { |
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904 Dispatch::Directory { was_file } => { |
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905 if was_file { |
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906 results.push((dir.to_owned(), Dispatch::Removed)); |
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907 } |
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908 if options.list_ignored |
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909 || options.list_unknown && !st.dir_ignore(&dir) |
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910 { |
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911 st.traverse( |
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912 &dir, |
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913 &old_results, |
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914 &mut results, |
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915 traversed_sender.clone(), |
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916 )?; |
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917 } |
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918 } |
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919 _ => unreachable!("There can only be directories in `work`"), |
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920 } |
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921 } |
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922 } |
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923 |
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924 if !matcher.is_exact() { |
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925 // Step 3: Check the remaining files from the dmap. |
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926 // If a dmap file is not in results yet, it was either |
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927 // a) not matched b) ignored, c) missing, or d) under a |
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928 // symlink directory. |
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929 |
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930 if options.list_unknown { |
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931 st.handle_unknowns(&mut results)?; |
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932 } else { |
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933 // We may not have walked the full directory tree above, so stat |
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934 // and check everything we missed. |
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935 st.extend_from_dmap(&mut results); |
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936 } |
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937 } |
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938 |
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939 drop(traversed_sender); |
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940 let traversed = traversed_receiver.into_iter().collect(); |
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941 |
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942 Ok((build_response(results, traversed), warnings)) |
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943 } |