Mercurial > hg
annotate rust/hg-core/src/dirstate/entry.rs @ 48157:b45c4dc65adc
dirstate-item: drop the legacy new_added constructor
Nobody is calling it anymore. Its purposes has been filled.
Differential Revision: https://phab.mercurial-scm.org/D11601
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Fri, 01 Oct 2021 09:16:53 +0200 |
parents | d342815ff827 |
children | da304f78a0e1 |
rev | line source |
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1 use crate::errors::HgError; |
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2 use bitflags::bitflags; |
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3 use std::convert::TryFrom; |
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4 |
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5 #[derive(Copy, Clone, Debug, Eq, PartialEq)] |
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6 pub enum EntryState { |
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7 Normal, |
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8 Added, |
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9 Removed, |
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10 Merged, |
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11 } |
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12 |
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13 /// The C implementation uses all signed types. This will be an issue |
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14 /// either when 4GB+ source files are commonplace or in 2038, whichever |
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15 /// comes first. |
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16 #[derive(Debug, PartialEq, Copy, Clone)] |
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17 pub struct DirstateEntry { |
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18 pub(crate) flags: Flags, |
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19 mode_size: Option<(i32, i32)>, |
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20 mtime: Option<i32>, |
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21 } |
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22 |
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23 bitflags! { |
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24 pub(crate) struct Flags: u8 { |
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25 const WDIR_TRACKED = 1 << 0; |
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26 const P1_TRACKED = 1 << 1; |
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27 const P2_INFO = 1 << 2; |
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28 } |
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29 } |
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30 |
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31 pub const V1_RANGEMASK: i32 = 0x7FFFFFFF; |
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32 |
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33 pub const MTIME_UNSET: i32 = -1; |
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34 |
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35 /// A `DirstateEntry` with a size of `-2` means that it was merged from the |
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36 /// other parent. This allows revert to pick the right status back during a |
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37 /// merge. |
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38 pub const SIZE_FROM_OTHER_PARENT: i32 = -2; |
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39 /// A special value used for internal representation of special case in |
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40 /// dirstate v1 format. |
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41 pub const SIZE_NON_NORMAL: i32 = -1; |
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42 |
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43 impl DirstateEntry { |
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44 pub fn from_v2_data( |
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45 wdir_tracked: bool, |
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46 p1_tracked: bool, |
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47 p2_info: bool, |
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48 mode_size: Option<(i32, i32)>, |
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49 mtime: Option<i32>, |
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50 ) -> Self { |
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51 let mut flags = Flags::empty(); |
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52 flags.set(Flags::WDIR_TRACKED, wdir_tracked); |
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53 flags.set(Flags::P1_TRACKED, p1_tracked); |
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54 flags.set(Flags::P2_INFO, p2_info); |
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55 Self { |
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56 flags, |
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57 mode_size, |
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58 mtime, |
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59 } |
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60 } |
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61 |
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62 pub fn from_v1_data( |
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63 state: EntryState, |
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64 mode: i32, |
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65 size: i32, |
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66 mtime: i32, |
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67 ) -> Self { |
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68 match state { |
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69 EntryState::Normal => { |
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70 if size == SIZE_FROM_OTHER_PARENT { |
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71 Self::new_from_p2() |
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72 } else if size == SIZE_NON_NORMAL { |
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73 Self::new_possibly_dirty() |
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74 } else if mtime == MTIME_UNSET { |
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75 Self { |
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76 flags: Flags::WDIR_TRACKED | Flags::P1_TRACKED, |
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77 mode_size: Some((mode, size)), |
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78 mtime: None, |
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79 } |
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80 } else { |
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81 Self::new_normal(mode, size, mtime) |
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82 } |
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83 } |
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84 EntryState::Added => Self { |
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85 flags: Flags::WDIR_TRACKED, |
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86 mode_size: None, |
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87 mtime: None, |
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88 }, |
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89 EntryState::Removed => Self { |
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90 flags: if size == SIZE_NON_NORMAL { |
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91 Flags::P1_TRACKED | Flags::P2_INFO |
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92 } else if size == SIZE_FROM_OTHER_PARENT { |
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93 // We don’t know if P1_TRACKED should be set (file history) |
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94 Flags::P2_INFO |
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95 } else { |
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96 Flags::P1_TRACKED |
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97 }, |
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98 mode_size: None, |
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99 mtime: None, |
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100 }, |
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101 EntryState::Merged => Self { |
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102 flags: Flags::WDIR_TRACKED |
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103 | Flags::P1_TRACKED // might not be true because of rename ? |
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104 | Flags::P2_INFO, // might not be true because of rename ? |
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105 mode_size: None, |
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106 mtime: None, |
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107 }, |
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108 } |
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109 } |
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110 |
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111 pub fn new_from_p2() -> Self { |
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112 Self { |
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113 // might be missing P1_TRACKED |
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114 flags: Flags::WDIR_TRACKED | Flags::P2_INFO, |
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115 mode_size: None, |
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116 mtime: None, |
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117 } |
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118 } |
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119 |
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120 pub fn new_possibly_dirty() -> Self { |
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121 Self { |
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122 flags: Flags::WDIR_TRACKED | Flags::P1_TRACKED, |
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123 mode_size: None, |
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124 mtime: None, |
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125 } |
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126 } |
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127 |
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128 pub fn new_normal(mode: i32, size: i32, mtime: i32) -> Self { |
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129 Self { |
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130 flags: Flags::WDIR_TRACKED | Flags::P1_TRACKED, |
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131 mode_size: Some((mode, size)), |
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132 mtime: Some(mtime), |
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133 } |
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134 } |
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135 |
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136 /// Creates a new entry in "removed" state. |
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137 /// |
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138 /// `size` is expected to be zero, `SIZE_NON_NORMAL`, or |
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139 /// `SIZE_FROM_OTHER_PARENT` |
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140 pub fn new_removed(size: i32) -> Self { |
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141 Self::from_v1_data(EntryState::Removed, 0, size, 0) |
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142 } |
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143 |
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144 pub fn tracked(&self) -> bool { |
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145 self.flags.contains(Flags::WDIR_TRACKED) |
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146 } |
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147 |
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148 pub fn p1_tracked(&self) -> bool { |
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149 self.flags.contains(Flags::P1_TRACKED) |
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150 } |
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151 |
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152 fn in_either_parent(&self) -> bool { |
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153 self.flags.intersects(Flags::P1_TRACKED | Flags::P2_INFO) |
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154 } |
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155 |
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156 pub fn removed(&self) -> bool { |
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157 self.in_either_parent() && !self.flags.contains(Flags::WDIR_TRACKED) |
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158 } |
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159 |
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160 pub fn p2_info(&self) -> bool { |
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161 self.flags.contains(Flags::WDIR_TRACKED | Flags::P2_INFO) |
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162 } |
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163 |
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164 pub fn added(&self) -> bool { |
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165 self.flags.contains(Flags::WDIR_TRACKED) && !self.in_either_parent() |
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166 } |
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167 |
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168 pub fn maybe_clean(&self) -> bool { |
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169 if !self.flags.contains(Flags::WDIR_TRACKED) { |
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170 false |
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171 } else if !self.flags.contains(Flags::P1_TRACKED) { |
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172 false |
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173 } else if self.flags.contains(Flags::P2_INFO) { |
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174 false |
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175 } else { |
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176 true |
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177 } |
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178 } |
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179 |
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180 pub fn any_tracked(&self) -> bool { |
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181 self.flags.intersects( |
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182 Flags::WDIR_TRACKED | Flags::P1_TRACKED | Flags::P2_INFO, |
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183 ) |
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184 } |
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185 |
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186 /// Returns `(wdir_tracked, p1_tracked, p2_info, mode_size, mtime)` |
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187 pub(crate) fn v2_data( |
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188 &self, |
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189 ) -> (bool, bool, bool, Option<(i32, i32)>, Option<i32>) { |
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190 if !self.any_tracked() { |
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191 // TODO: return an Option instead? |
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192 panic!("Accessing v1_state of an untracked DirstateEntry") |
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193 } |
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194 let wdir_tracked = self.flags.contains(Flags::WDIR_TRACKED); |
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195 let p1_tracked = self.flags.contains(Flags::P1_TRACKED); |
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196 let p2_info = self.flags.contains(Flags::P2_INFO); |
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197 let mode_size = self.mode_size; |
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198 let mtime = self.mtime; |
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199 (wdir_tracked, p1_tracked, p2_info, mode_size, mtime) |
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200 } |
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201 |
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202 fn v1_state(&self) -> EntryState { |
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203 if !self.any_tracked() { |
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204 // TODO: return an Option instead? |
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205 panic!("Accessing v1_state of an untracked DirstateEntry") |
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206 } |
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207 if self.removed() { |
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208 EntryState::Removed |
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209 } else if self |
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210 .flags |
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211 .contains(Flags::WDIR_TRACKED | Flags::P1_TRACKED | Flags::P2_INFO) |
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212 { |
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213 EntryState::Merged |
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214 } else if self.added() { |
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215 EntryState::Added |
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216 } else { |
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217 EntryState::Normal |
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218 } |
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219 } |
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220 |
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221 fn v1_mode(&self) -> i32 { |
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222 if let Some((mode, _size)) = self.mode_size { |
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223 mode |
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224 } else { |
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225 0 |
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226 } |
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227 } |
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228 |
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229 fn v1_size(&self) -> i32 { |
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230 if !self.any_tracked() { |
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231 // TODO: return an Option instead? |
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232 panic!("Accessing v1_size of an untracked DirstateEntry") |
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233 } |
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234 if self.removed() |
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235 && self.flags.contains(Flags::P1_TRACKED | Flags::P2_INFO) |
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236 { |
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237 SIZE_NON_NORMAL |
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238 } else if self.flags.contains(Flags::P2_INFO) { |
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239 SIZE_FROM_OTHER_PARENT |
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240 } else if self.removed() { |
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241 0 |
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242 } else if self.added() { |
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243 SIZE_NON_NORMAL |
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244 } else if let Some((_mode, size)) = self.mode_size { |
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245 size |
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246 } else { |
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247 SIZE_NON_NORMAL |
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248 } |
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249 } |
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250 |
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251 fn v1_mtime(&self) -> i32 { |
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252 if !self.any_tracked() { |
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253 // TODO: return an Option instead? |
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254 panic!("Accessing v1_mtime of an untracked DirstateEntry") |
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255 } |
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256 if self.removed() { |
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257 0 |
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258 } else if self.flags.contains(Flags::P2_INFO) { |
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259 MTIME_UNSET |
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260 } else if !self.flags.contains(Flags::P1_TRACKED) { |
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261 MTIME_UNSET |
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262 } else { |
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263 self.mtime.unwrap_or(MTIME_UNSET) |
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264 } |
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265 } |
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266 |
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267 // TODO: return `Option<EntryState>`? None when `!self.any_tracked` |
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268 pub fn state(&self) -> EntryState { |
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269 self.v1_state() |
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270 } |
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271 |
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272 // TODO: return Option? |
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273 pub fn mode(&self) -> i32 { |
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274 self.v1_mode() |
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275 } |
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276 |
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277 // TODO: return Option? |
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278 pub fn size(&self) -> i32 { |
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279 self.v1_size() |
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280 } |
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281 |
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282 // TODO: return Option? |
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283 pub fn mtime(&self) -> i32 { |
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284 self.v1_mtime() |
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285 } |
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286 |
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287 pub fn drop_merge_data(&mut self) { |
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288 if self.flags.contains(Flags::P2_INFO) { |
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289 self.flags.remove(Flags::P2_INFO); |
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290 self.mode_size = None; |
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291 self.mtime = None; |
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292 } |
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293 } |
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294 |
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295 pub fn set_possibly_dirty(&mut self) { |
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296 self.mtime = None |
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297 } |
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298 |
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299 pub fn set_clean(&mut self, mode: i32, size: i32, mtime: i32) { |
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300 self.flags.insert(Flags::WDIR_TRACKED | Flags::P1_TRACKED); |
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301 self.mode_size = Some((mode, size)); |
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302 self.mtime = Some(mtime); |
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303 } |
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304 |
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305 pub fn set_tracked(&mut self) { |
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306 self.flags.insert(Flags::WDIR_TRACKED); |
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307 // `set_tracked` is replacing various `normallookup` call. So we mark |
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308 // the files as needing lookup |
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309 // |
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310 // Consider dropping this in the future in favor of something less |
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311 // broad. |
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312 self.mtime = None; |
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313 } |
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314 |
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315 pub fn set_untracked(&mut self) { |
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316 self.flags.remove(Flags::WDIR_TRACKED); |
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317 self.mode_size = None; |
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318 self.mtime = None; |
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319 } |
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320 |
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321 /// Returns `(state, mode, size, mtime)` for the puprose of serialization |
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322 /// in the dirstate-v1 format. |
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323 /// |
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324 /// This includes marker values such as `mtime == -1`. In the future we may |
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325 /// want to not represent these cases that way in memory, but serialization |
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326 /// will need to keep the same format. |
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327 pub fn v1_data(&self) -> (u8, i32, i32, i32) { |
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328 ( |
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329 self.v1_state().into(), |
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330 self.v1_mode(), |
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331 self.v1_size(), |
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332 self.v1_mtime(), |
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333 ) |
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334 } |
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335 |
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336 pub(crate) fn is_from_other_parent(&self) -> bool { |
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337 self.state() == EntryState::Normal |
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338 && self.size() == SIZE_FROM_OTHER_PARENT |
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339 } |
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340 |
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341 // TODO: other platforms |
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342 #[cfg(unix)] |
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343 pub fn mode_changed( |
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344 &self, |
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345 filesystem_metadata: &std::fs::Metadata, |
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346 ) -> bool { |
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347 use std::os::unix::fs::MetadataExt; |
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348 const EXEC_BIT_MASK: u32 = 0o100; |
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349 let dirstate_exec_bit = (self.mode() as u32) & EXEC_BIT_MASK; |
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350 let fs_exec_bit = filesystem_metadata.mode() & EXEC_BIT_MASK; |
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351 dirstate_exec_bit != fs_exec_bit |
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352 } |
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353 |
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354 /// Returns a `(state, mode, size, mtime)` tuple as for |
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355 /// `DirstateMapMethods::debug_iter`. |
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356 pub fn debug_tuple(&self) -> (u8, i32, i32, i32) { |
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357 (self.state().into(), self.mode(), self.size(), self.mtime()) |
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358 } |
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359 |
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360 pub fn mtime_is_ambiguous(&self, now: i32) -> bool { |
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361 self.state() == EntryState::Normal && self.mtime() == now |
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362 } |
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363 |
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364 pub fn clear_ambiguous_mtime(&mut self, now: i32) -> bool { |
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365 let ambiguous = self.mtime_is_ambiguous(now); |
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366 if ambiguous { |
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367 // The file was last modified "simultaneously" with the current |
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368 // write to dirstate (i.e. within the same second for file- |
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369 // systems with a granularity of 1 sec). This commonly happens |
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370 // for at least a couple of files on 'update'. |
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371 // The user could change the file without changing its size |
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372 // within the same second. Invalidate the file's mtime in |
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373 // dirstate, forcing future 'status' calls to compare the |
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374 // contents of the file if the size is the same. This prevents |
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375 // mistakenly treating such files as clean. |
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376 self.set_possibly_dirty() |
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377 } |
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378 ambiguous |
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379 } |
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380 } |
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381 |
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382 impl EntryState { |
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383 pub fn is_tracked(self) -> bool { |
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384 use EntryState::*; |
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385 match self { |
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386 Normal | Added | Merged => true, |
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387 Removed => false, |
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388 } |
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389 } |
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390 } |
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391 |
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392 impl TryFrom<u8> for EntryState { |
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393 type Error = HgError; |
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394 |
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395 fn try_from(value: u8) -> Result<Self, Self::Error> { |
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396 match value { |
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397 b'n' => Ok(EntryState::Normal), |
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398 b'a' => Ok(EntryState::Added), |
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399 b'r' => Ok(EntryState::Removed), |
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400 b'm' => Ok(EntryState::Merged), |
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401 _ => Err(HgError::CorruptedRepository(format!( |
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402 "Incorrect dirstate entry state {}", |
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403 value |
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404 ))), |
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405 } |
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406 } |
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407 } |
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408 |
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409 impl Into<u8> for EntryState { |
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410 fn into(self) -> u8 { |
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411 match self { |
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412 EntryState::Normal => b'n', |
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413 EntryState::Added => b'a', |
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414 EntryState::Removed => b'r', |
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415 EntryState::Merged => b'm', |
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416 } |
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417 } |
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418 } |