annotate rust/hg-core/src/dirstate_tree/on_disk.rs @ 48265:3861e3f6ad54

dirstate-v2: read the fallback value in Rust This was overlooked in a previous commit. Differential Revision: https://phab.mercurial-scm.org/D11695
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Tue, 19 Oct 2021 20:14:17 +0200
parents bb240915f69f
children 749946b6a641
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1 //! The "version 2" disk representation of the dirstate
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2 //!
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3 //! See `mercurial/helptext/internals/dirstate-v2.txt`
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4
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5 use crate::dirstate::TruncatedTimestamp;
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6 use crate::dirstate_tree::dirstate_map::{self, DirstateMap, NodeRef};
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7 use crate::dirstate_tree::path_with_basename::WithBasename;
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8 use crate::errors::HgError;
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9 use crate::utils::hg_path::HgPath;
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10 use crate::DirstateEntry;
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11 use crate::DirstateError;
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12 use crate::DirstateParents;
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13 use bitflags::bitflags;
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14 use bytes_cast::unaligned::{U16Be, U32Be};
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15 use bytes_cast::BytesCast;
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16 use format_bytes::format_bytes;
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17 use std::borrow::Cow;
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18 use std::convert::{TryFrom, TryInto};
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19
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20 /// Added at the start of `.hg/dirstate` when the "v2" format is used.
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21 /// This a redundant sanity check more than an actual "magic number" since
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22 /// `.hg/requires` already governs which format should be used.
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23 pub const V2_FORMAT_MARKER: &[u8; 12] = b"dirstate-v2\n";
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24
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25 /// Keep space for 256-bit hashes
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26 const STORED_NODE_ID_BYTES: usize = 32;
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27
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28 /// … even though only 160 bits are used for now, with SHA-1
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29 const USED_NODE_ID_BYTES: usize = 20;
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30
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31 pub(super) const IGNORE_PATTERNS_HASH_LEN: usize = 20;
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32 pub(super) type IgnorePatternsHash = [u8; IGNORE_PATTERNS_HASH_LEN];
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33
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34 /// Must match constants of the same names in `mercurial/dirstateutils/v2.py`
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35 const TREE_METADATA_SIZE: usize = 44;
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36 const NODE_SIZE: usize = 44;
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37
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38 /// Make sure that size-affecting changes are made knowingly
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39 #[allow(unused)]
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40 fn static_assert_size_of() {
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41 let _ = std::mem::transmute::<TreeMetadata, [u8; TREE_METADATA_SIZE]>;
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42 let _ = std::mem::transmute::<DocketHeader, [u8; TREE_METADATA_SIZE + 81]>;
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43 let _ = std::mem::transmute::<Node, [u8; NODE_SIZE]>;
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44 }
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45
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46 // Must match `HEADER` in `mercurial/dirstateutils/docket.py`
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47 #[derive(BytesCast)]
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48 #[repr(C)]
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49 struct DocketHeader {
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50 marker: [u8; V2_FORMAT_MARKER.len()],
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51 parent_1: [u8; STORED_NODE_ID_BYTES],
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52 parent_2: [u8; STORED_NODE_ID_BYTES],
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53
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54 metadata: TreeMetadata,
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55
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56 /// Counted in bytes
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57 data_size: Size,
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58
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59 uuid_size: u8,
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60 }
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61
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62 pub struct Docket<'on_disk> {
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63 header: &'on_disk DocketHeader,
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64 uuid: &'on_disk [u8],
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65 }
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66
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67 /// Fields are documented in the *Tree metadata in the docket file*
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68 /// section of `mercurial/helptext/internals/dirstate-v2.txt`
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69 #[derive(BytesCast)]
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70 #[repr(C)]
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71 struct TreeMetadata {
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72 root_nodes: ChildNodes,
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73 nodes_with_entry_count: Size,
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74 nodes_with_copy_source_count: Size,
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75 unreachable_bytes: Size,
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76 unused: [u8; 4],
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77
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78 /// See *Optional hash of ignore patterns* section of
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79 /// `mercurial/helptext/internals/dirstate-v2.txt`
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80 ignore_patterns_hash: IgnorePatternsHash,
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81 }
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82
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83 /// Fields are documented in the *The data file format*
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84 /// section of `mercurial/helptext/internals/dirstate-v2.txt`
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85 #[derive(BytesCast)]
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86 #[repr(C)]
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87 pub(super) struct Node {
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88 full_path: PathSlice,
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89
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90 /// In bytes from `self.full_path.start`
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91 base_name_start: PathSize,
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92
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93 copy_source: OptPathSlice,
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94 children: ChildNodes,
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95 pub(super) descendants_with_entry_count: Size,
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96 pub(super) tracked_descendants_count: Size,
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97 flags: U16Be,
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98 size: U32Be,
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99 mtime: PackedTruncatedTimestamp,
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100 }
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101
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102 bitflags! {
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103 #[repr(C)]
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104 struct Flags: u16 {
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105 const WDIR_TRACKED = 1 << 0;
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106 const P1_TRACKED = 1 << 1;
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107 const P2_INFO = 1 << 2;
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108 const HAS_MODE_AND_SIZE = 1 << 3;
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109 const HAS_MTIME = 1 << 4;
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110 const DIRECTORY = 1 << 5;
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111 const MODE_EXEC_PERM = 1 << 6;
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112 const MODE_IS_SYMLINK = 1 << 7;
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113 const EXPECTED_STATE_IS_MODIFIED = 1 << 8;
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114 const ALL_UNKNOWN_RECORDED = 1 << 9;
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115 const ALL_IGNORED_RECORDED = 1 << 10;
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116 const HAS_FALLBACK_EXEC = 1 << 11;
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117 const FALLBACK_EXEC = 1 << 12;
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118 const HAS_FALLBACK_SYMLINK = 1 << 13;
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119 const FALLBACK_SYMLINK = 1 << 14;
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120 const MTIME_SECOND_AMBIGUOUS = 1 << 15;
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121 }
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122 }
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123
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124 /// Duration since the Unix epoch
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125 #[derive(BytesCast, Copy, Clone)]
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126 #[repr(C)]
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127 struct PackedTruncatedTimestamp {
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128 truncated_seconds: U32Be,
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129 nanoseconds: U32Be,
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130 }
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131
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132 /// Counted in bytes from the start of the file
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133 ///
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134 /// NOTE: not supporting `.hg/dirstate` files larger than 4 GiB.
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135 type Offset = U32Be;
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136
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137 /// Counted in number of items
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138 ///
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139 /// NOTE: we choose not to support counting more than 4 billion nodes anywhere.
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140 type Size = U32Be;
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141
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142 /// Counted in bytes
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143 ///
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144 /// NOTE: we choose not to support file names/paths longer than 64 KiB.
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145 type PathSize = U16Be;
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146
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147 /// A contiguous sequence of `len` times `Node`, representing the child nodes
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148 /// of either some other node or of the repository root.
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149 ///
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150 /// Always sorted by ascending `full_path`, to allow binary search.
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151 /// Since nodes with the same parent nodes also have the same parent path,
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152 /// only the `base_name`s need to be compared during binary search.
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153 #[derive(BytesCast, Copy, Clone)]
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154 #[repr(C)]
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155 struct ChildNodes {
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156 start: Offset,
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157 len: Size,
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158 }
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159
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160 /// A `HgPath` of `len` bytes
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161 #[derive(BytesCast, Copy, Clone)]
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162 #[repr(C)]
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163 struct PathSlice {
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164 start: Offset,
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165 len: PathSize,
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166 }
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167
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168 /// Either nothing if `start == 0`, or a `HgPath` of `len` bytes
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169 type OptPathSlice = PathSlice;
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170
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171 /// Unexpected file format found in `.hg/dirstate` with the "v2" format.
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172 ///
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173 /// This should only happen if Mercurial is buggy or a repository is corrupted.
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174 #[derive(Debug)]
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175 pub struct DirstateV2ParseError;
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176
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177 impl From<DirstateV2ParseError> for HgError {
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178 fn from(_: DirstateV2ParseError) -> Self {
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179 HgError::corrupted("dirstate-v2 parse error")
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180 }
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181 }
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182
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183 impl From<DirstateV2ParseError> for crate::DirstateError {
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184 fn from(error: DirstateV2ParseError) -> Self {
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185 HgError::from(error).into()
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186 }
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187 }
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188
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189 impl<'on_disk> Docket<'on_disk> {
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190 pub fn parents(&self) -> DirstateParents {
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191 use crate::Node;
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192 let p1 = Node::try_from(&self.header.parent_1[..USED_NODE_ID_BYTES])
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193 .unwrap()
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194 .clone();
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195 let p2 = Node::try_from(&self.header.parent_2[..USED_NODE_ID_BYTES])
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196 .unwrap()
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197 .clone();
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198 DirstateParents { p1, p2 }
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199 }
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200
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201 pub fn tree_metadata(&self) -> &[u8] {
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202 self.header.metadata.as_bytes()
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203 }
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204
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205 pub fn data_size(&self) -> usize {
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206 // This `unwrap` could only panic on a 16-bit CPU
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207 self.header.data_size.get().try_into().unwrap()
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208 }
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209
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210 pub fn data_filename(&self) -> String {
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211 String::from_utf8(format_bytes!(b"dirstate.{}", self.uuid)).unwrap()
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212 }
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213 }
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214
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215 pub fn read_docket(
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216 on_disk: &[u8],
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217 ) -> Result<Docket<'_>, DirstateV2ParseError> {
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218 let (header, uuid) =
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219 DocketHeader::from_bytes(on_disk).map_err(|_| DirstateV2ParseError)?;
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220 let uuid_size = header.uuid_size as usize;
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221 if header.marker == *V2_FORMAT_MARKER && uuid.len() == uuid_size {
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222 Ok(Docket { header, uuid })
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223 } else {
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224 Err(DirstateV2ParseError)
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225 }
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226 }
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227
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diff changeset
228 pub(super) fn read<'on_disk>(
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diff changeset
229 on_disk: &'on_disk [u8],
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diff changeset
230 metadata: &[u8],
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231 ) -> Result<DirstateMap<'on_disk>, DirstateV2ParseError> {
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232 if on_disk.is_empty() {
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233 return Ok(DirstateMap::empty(on_disk));
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234 }
47682
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diff changeset
235 let (meta, _) = TreeMetadata::from_bytes(metadata)
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diff changeset
236 .map_err(|_| DirstateV2ParseError)?;
47283
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237 let dirstate_map = DirstateMap {
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238 on_disk,
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
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diff changeset
239 root: dirstate_map::ChildNodes::OnDisk(read_nodes(
47374
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diff changeset
240 on_disk,
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diff changeset
241 meta.root_nodes,
47337
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242 )?),
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diff changeset
243 nodes_with_entry_count: meta.nodes_with_entry_count.get(),
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244 nodes_with_copy_source_count: meta.nodes_with_copy_source_count.get(),
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diff changeset
245 ignore_patterns_hash: meta.ignore_patterns_hash,
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diff changeset
246 unreachable_bytes: meta.unreachable_bytes.get(),
47283
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diff changeset
247 };
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diff changeset
248 Ok(dirstate_map)
47283
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249 }
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250
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251 impl Node {
47337
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252 pub(super) fn full_path<'on_disk>(
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253 &self,
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254 on_disk: &'on_disk [u8],
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diff changeset
255 ) -> Result<&'on_disk HgPath, DirstateV2ParseError> {
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parents: 47336
diff changeset
256 read_hg_path(on_disk, self.full_path)
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diff changeset
257 }
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parents: 47336
diff changeset
258
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diff changeset
259 pub(super) fn base_name_start<'on_disk>(
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diff changeset
260 &self,
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parents: 47336
diff changeset
261 ) -> Result<usize, DirstateV2ParseError> {
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parents: 47336
diff changeset
262 let start = self.base_name_start.get();
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parents: 47336
diff changeset
263 if start < self.full_path.len.get() {
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parents: 47336
diff changeset
264 let start = usize::try_from(start)
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parents: 47336
diff changeset
265 // u32 -> usize, could only panic on a 16-bit CPU
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parents: 47336
diff changeset
266 .expect("dirstate-v2 base_name_start out of bounds");
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diff changeset
267 Ok(start)
47283
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parents: 47280
diff changeset
268 } else {
47334
18b3060fe598 dirstate-v2: Add a zero-size error type for dirstate v2 parse errors
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parents: 47333
diff changeset
269 Err(DirstateV2ParseError)
47283
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270 }
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diff changeset
271 }
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diff changeset
272
47337
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diff changeset
273 pub(super) fn base_name<'on_disk>(
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diff changeset
274 &self,
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diff changeset
275 on_disk: &'on_disk [u8],
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parents: 47336
diff changeset
276 ) -> Result<&'on_disk HgPath, DirstateV2ParseError> {
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diff changeset
277 let full_path = self.full_path(on_disk)?;
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parents: 47336
diff changeset
278 let base_name_start = self.base_name_start()?;
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diff changeset
279 Ok(HgPath::new(&full_path.as_bytes()[base_name_start..]))
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parents: 47336
diff changeset
280 }
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parents: 47336
diff changeset
281
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diff changeset
282 pub(super) fn path<'on_disk>(
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diff changeset
283 &self,
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diff changeset
284 on_disk: &'on_disk [u8],
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parents: 47336
diff changeset
285 ) -> Result<dirstate_map::NodeKey<'on_disk>, DirstateV2ParseError> {
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parents: 47336
diff changeset
286 Ok(WithBasename::from_raw_parts(
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diff changeset
287 Cow::Borrowed(self.full_path(on_disk)?),
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diff changeset
288 self.base_name_start()?,
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diff changeset
289 ))
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diff changeset
290 }
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parents: 47336
diff changeset
291
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diff changeset
292 pub(super) fn has_copy_source<'on_disk>(&self) -> bool {
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
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parents: 47336
diff changeset
293 self.copy_source.start.get() != 0
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diff changeset
294 }
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parents: 47336
diff changeset
295
47283
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diff changeset
296 pub(super) fn copy_source<'on_disk>(
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diff changeset
297 &self,
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diff changeset
298 on_disk: &'on_disk [u8],
47337
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parents: 47336
diff changeset
299 ) -> Result<Option<&'on_disk HgPath>, DirstateV2ParseError> {
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parents: 47336
diff changeset
300 Ok(if self.has_copy_source() {
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
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parents: 47280
diff changeset
301 Some(read_hg_path(on_disk, self.copy_source)?)
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
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parents: 47280
diff changeset
302 } else {
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diff changeset
303 None
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Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
304 })
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diff changeset
305 }
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Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
306
48231
0524c1359bfc dirstate-v2: Extend node flags to 16 bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48221
diff changeset
307 fn flags(&self) -> Flags {
0524c1359bfc dirstate-v2: Extend node flags to 16 bits
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parents: 48221
diff changeset
308 Flags::from_bits_truncate(self.flags.get())
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diff changeset
309 }
0524c1359bfc dirstate-v2: Extend node flags to 16 bits
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parents: 48221
diff changeset
310
48139
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Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
311 fn has_entry(&self) -> bool {
48231
0524c1359bfc dirstate-v2: Extend node flags to 16 bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48221
diff changeset
312 self.flags().intersects(
48139
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Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
313 Flags::WDIR_TRACKED | Flags::P1_TRACKED | Flags::P2_INFO,
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
314 )
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
315 }
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
316
47348
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
Simon Sapin <simon.sapin@octobus.net>
parents: 47337
diff changeset
317 pub(super) fn node_data(
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
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parents: 47337
diff changeset
318 &self,
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
Simon Sapin <simon.sapin@octobus.net>
parents: 47337
diff changeset
319 ) -> Result<dirstate_map::NodeData, DirstateV2ParseError> {
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
320 if self.has_entry() {
48260
269ff8978086 dirstate: store mtimes with nanosecond precision in memory
Simon Sapin <simon.sapin@octobus.net>
parents: 48254
diff changeset
321 Ok(dirstate_map::NodeData::Entry(self.assume_entry()?))
48193
320de901896a dirstate-v2: Truncate directory mtimes to 31 bits of seconds
Simon Sapin <simon.sapin@octobus.net>
parents: 48192
diff changeset
322 } else if let Some(mtime) = self.cached_directory_mtime()? {
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
323 Ok(dirstate_map::NodeData::CachedDirectory { mtime })
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
324 } else {
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
325 Ok(dirstate_map::NodeData::None)
47348
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
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diff changeset
326 }
47337
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diff changeset
327 }
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Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
328
48193
320de901896a dirstate-v2: Truncate directory mtimes to 31 bits of seconds
Simon Sapin <simon.sapin@octobus.net>
parents: 48192
diff changeset
329 pub(super) fn cached_directory_mtime(
320de901896a dirstate-v2: Truncate directory mtimes to 31 bits of seconds
Simon Sapin <simon.sapin@octobus.net>
parents: 48192
diff changeset
330 &self,
320de901896a dirstate-v2: Truncate directory mtimes to 31 bits of seconds
Simon Sapin <simon.sapin@octobus.net>
parents: 48192
diff changeset
331 ) -> Result<Option<TruncatedTimestamp>, DirstateV2ParseError> {
48264
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
332 // For now we do not have code to handle the absence of
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
333 // ALL_UNKNOWN_RECORDED, so we ignore the mtime if the flag is
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
334 // unset.
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
335 if self.flags().contains(Flags::DIRECTORY)
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
336 && self.flags().contains(Flags::HAS_MTIME)
48251
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
337 && self.flags().contains(Flags::ALL_UNKNOWN_RECORDED)
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
338 {
48264
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
339 Ok(Some(self.mtime.try_into()?))
48232
f7fd629ffb98 dirstate-v2: Separate HAS_FILE_MTIME and HAS_DIRECTORY_MTIME flags
Simon Sapin <simon.sapin@octobus.net>
parents: 48231
diff changeset
340 } else {
f7fd629ffb98 dirstate-v2: Separate HAS_FILE_MTIME and HAS_DIRECTORY_MTIME flags
Simon Sapin <simon.sapin@octobus.net>
parents: 48231
diff changeset
341 Ok(None)
f7fd629ffb98 dirstate-v2: Separate HAS_FILE_MTIME and HAS_DIRECTORY_MTIME flags
Simon Sapin <simon.sapin@octobus.net>
parents: 48231
diff changeset
342 }
47349
7138c863d0a1 dirstate-v2: Skip readdir in status based on directory mtime
Simon Sapin <simon.sapin@octobus.net>
parents: 47348
diff changeset
343 }
7138c863d0a1 dirstate-v2: Skip readdir in status based on directory mtime
Simon Sapin <simon.sapin@octobus.net>
parents: 47348
diff changeset
344
48195
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
345 fn synthesize_unix_mode(&self) -> u32 {
48231
0524c1359bfc dirstate-v2: Extend node flags to 16 bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48221
diff changeset
346 let file_type = if self.flags().contains(Flags::MODE_IS_SYMLINK) {
48195
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
347 libc::S_IFLNK
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
348 } else {
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
349 libc::S_IFREG
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
350 };
48231
0524c1359bfc dirstate-v2: Extend node flags to 16 bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48221
diff changeset
351 let permisions = if self.flags().contains(Flags::MODE_EXEC_PERM) {
48195
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
352 0o755
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
353 } else {
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
354 0o644
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
355 };
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
356 file_type | permisions
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
357 }
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
358
48260
269ff8978086 dirstate: store mtimes with nanosecond precision in memory
Simon Sapin <simon.sapin@octobus.net>
parents: 48254
diff changeset
359 fn assume_entry(&self) -> Result<DirstateEntry, DirstateV2ParseError> {
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
360 // TODO: convert through raw bits instead?
48231
0524c1359bfc dirstate-v2: Extend node flags to 16 bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48221
diff changeset
361 let wdir_tracked = self.flags().contains(Flags::WDIR_TRACKED);
0524c1359bfc dirstate-v2: Extend node flags to 16 bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48221
diff changeset
362 let p1_tracked = self.flags().contains(Flags::P1_TRACKED);
0524c1359bfc dirstate-v2: Extend node flags to 16 bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48221
diff changeset
363 let p2_info = self.flags().contains(Flags::P2_INFO);
48250
1730b2fceaa1 dirstate-v2: adds a flag to mark a file as modified
Simon Sapin <simon.sapin@octobus.net>
parents: 48232
diff changeset
364 let mode_size = if self.flags().contains(Flags::HAS_MODE_AND_SIZE)
1730b2fceaa1 dirstate-v2: adds a flag to mark a file as modified
Simon Sapin <simon.sapin@octobus.net>
parents: 48232
diff changeset
365 && !self.flags().contains(Flags::EXPECTED_STATE_IS_MODIFIED)
1730b2fceaa1 dirstate-v2: adds a flag to mark a file as modified
Simon Sapin <simon.sapin@octobus.net>
parents: 48232
diff changeset
366 {
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
367 Some((self.synthesize_unix_mode(), self.size.into()))
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
368 } else {
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
369 None
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
370 };
48264
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
371 let mtime = if self.flags().contains(Flags::HAS_MTIME)
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
372 && !self.flags().contains(Flags::DIRECTORY)
48250
1730b2fceaa1 dirstate-v2: adds a flag to mark a file as modified
Simon Sapin <simon.sapin@octobus.net>
parents: 48232
diff changeset
373 && !self.flags().contains(Flags::EXPECTED_STATE_IS_MODIFIED)
48261
9205d9be8b41 dirstate-v2: add a new MTIME_SECOND_AMBIGUOUS flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48260
diff changeset
374 // The current code is not able to do the more subtle comparison that the
9205d9be8b41 dirstate-v2: add a new MTIME_SECOND_AMBIGUOUS flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48260
diff changeset
375 // MTIME_SECOND_AMBIGUOUS requires. So we ignore the mtime
9205d9be8b41 dirstate-v2: add a new MTIME_SECOND_AMBIGUOUS flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48260
diff changeset
376 && !self.flags().contains(Flags::MTIME_SECOND_AMBIGUOUS)
48250
1730b2fceaa1 dirstate-v2: adds a flag to mark a file as modified
Simon Sapin <simon.sapin@octobus.net>
parents: 48232
diff changeset
377 {
48263
83d0bd45b662 dirstate-v2: actually use sub-second mtime precision
Simon Sapin <simon.sapin@octobus.net>
parents: 48261
diff changeset
378 Some(self.mtime.try_into()?)
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
379 } else {
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
380 None
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
381 };
48265
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
382 let fallback_exec = if self.flags().contains(Flags::HAS_FALLBACK_EXEC)
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
383 {
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
384 Some(self.flags().contains(Flags::FALLBACK_EXEC))
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
385 } else {
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
386 None
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
387 };
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
388 let fallback_symlink =
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
389 if self.flags().contains(Flags::HAS_FALLBACK_SYMLINK) {
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
390 Some(self.flags().contains(Flags::FALLBACK_SYMLINK))
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
391 } else {
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
392 None
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
393 };
48260
269ff8978086 dirstate: store mtimes with nanosecond precision in memory
Simon Sapin <simon.sapin@octobus.net>
parents: 48254
diff changeset
394 Ok(DirstateEntry::from_v2_data(
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
395 wdir_tracked,
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
396 p1_tracked,
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
397 p2_info,
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
398 mode_size,
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
399 mtime,
48265
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
400 fallback_exec,
3861e3f6ad54 dirstate-v2: read the fallback value in Rust
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48264
diff changeset
401 fallback_symlink,
48260
269ff8978086 dirstate: store mtimes with nanosecond precision in memory
Simon Sapin <simon.sapin@octobus.net>
parents: 48254
diff changeset
402 ))
47337
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
403 }
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
404
47334
18b3060fe598 dirstate-v2: Add a zero-size error type for dirstate v2 parse errors
Simon Sapin <simon.sapin@octobus.net>
parents: 47333
diff changeset
405 pub(super) fn entry(
18b3060fe598 dirstate-v2: Add a zero-size error type for dirstate v2 parse errors
Simon Sapin <simon.sapin@octobus.net>
parents: 47333
diff changeset
406 &self,
18b3060fe598 dirstate-v2: Add a zero-size error type for dirstate v2 parse errors
Simon Sapin <simon.sapin@octobus.net>
parents: 47333
diff changeset
407 ) -> Result<Option<DirstateEntry>, DirstateV2ParseError> {
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
408 if self.has_entry() {
48260
269ff8978086 dirstate: store mtimes with nanosecond precision in memory
Simon Sapin <simon.sapin@octobus.net>
parents: 48254
diff changeset
409 Ok(Some(self.assume_entry()?))
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
410 } else {
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
411 Ok(None)
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
412 }
47337
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
413 }
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
414
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
415 pub(super) fn children<'on_disk>(
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
416 &self,
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
417 on_disk: &'on_disk [u8],
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
418 ) -> Result<&'on_disk [Node], DirstateV2ParseError> {
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
419 read_nodes(on_disk, self.children)
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
420 }
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
421
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
422 pub(super) fn to_in_memory_node<'on_disk>(
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
423 &self,
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
424 on_disk: &'on_disk [u8],
47334
18b3060fe598 dirstate-v2: Add a zero-size error type for dirstate v2 parse errors
Simon Sapin <simon.sapin@octobus.net>
parents: 47333
diff changeset
425 ) -> Result<dirstate_map::Node<'on_disk>, DirstateV2ParseError> {
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
426 Ok(dirstate_map::Node {
47337
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
427 children: dirstate_map::ChildNodes::OnDisk(
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
428 self.children(on_disk)?,
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
429 ),
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
430 copy_source: self.copy_source(on_disk)?.map(Cow::Borrowed),
47348
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
Simon Sapin <simon.sapin@octobus.net>
parents: 47337
diff changeset
431 data: self.node_data()?,
47478
ca8121d26732 dirstate-tree: Keep a counter of descendant nodes that have an entry
Simon Sapin <simon.sapin@octobus.net>
parents: 47476
diff changeset
432 descendants_with_entry_count: self
ca8121d26732 dirstate-tree: Keep a counter of descendant nodes that have an entry
Simon Sapin <simon.sapin@octobus.net>
parents: 47476
diff changeset
433 .descendants_with_entry_count
ca8121d26732 dirstate-tree: Keep a counter of descendant nodes that have an entry
Simon Sapin <simon.sapin@octobus.net>
parents: 47476
diff changeset
434 .get(),
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
435 tracked_descendants_count: self.tracked_descendants_count.get(),
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
436 })
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
437 }
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
438
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
439 fn from_dirstate_entry(
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
440 entry: &DirstateEntry,
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
441 ) -> (Flags, U32Be, PackedTruncatedTimestamp) {
48254
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
442 let (
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
443 wdir_tracked,
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
444 p1_tracked,
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
445 p2_info,
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
446 mode_size_opt,
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
447 mtime_opt,
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
448 fallback_exec,
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
449 fallback_symlink,
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
450 ) = entry.v2_data();
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
451 // TODO: convert throug raw flag bits instead?
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
452 let mut flags = Flags::empty();
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
453 flags.set(Flags::WDIR_TRACKED, wdir_tracked);
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
454 flags.set(Flags::P1_TRACKED, p1_tracked);
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
455 flags.set(Flags::P2_INFO, p2_info);
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
456 let size = if let Some((m, s)) = mode_size_opt {
48195
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
457 let exec_perm = m & libc::S_IXUSR != 0;
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
458 let is_symlink = m & libc::S_IFMT == libc::S_IFLNK;
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
459 flags.set(Flags::MODE_EXEC_PERM, exec_perm);
4d5a13253d34 dirstate-v2: Replace the 32-bit `mode` field with two bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48194
diff changeset
460 flags.set(Flags::MODE_IS_SYMLINK, is_symlink);
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
461 flags.insert(Flags::HAS_MODE_AND_SIZE);
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
462 s.into()
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
463 } else {
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
464 0.into()
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
465 };
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
466 let mtime = if let Some(m) = mtime_opt {
48264
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
467 flags.insert(Flags::HAS_MTIME);
48260
269ff8978086 dirstate: store mtimes with nanosecond precision in memory
Simon Sapin <simon.sapin@octobus.net>
parents: 48254
diff changeset
468 m.into()
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
469 } else {
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
470 PackedTruncatedTimestamp::null()
48192
d2f760c2c91c dirstate-v2: Separate Rust structs for Timestamp and PackedTimestamp
Simon Sapin <simon.sapin@octobus.net>
parents: 48191
diff changeset
471 };
48254
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
472 if let Some(f_exec) = fallback_exec {
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
473 flags.insert(Flags::HAS_FALLBACK_EXEC);
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
474 if f_exec {
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
475 flags.insert(Flags::FALLBACK_EXEC);
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
476 }
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
477 }
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
478 if let Some(f_symlink) = fallback_symlink {
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
479 flags.insert(Flags::HAS_FALLBACK_SYMLINK);
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
480 if f_symlink {
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
481 flags.insert(Flags::FALLBACK_SYMLINK);
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
482 }
b874e8d81a98 dirstate-v2: preserve the fallback values on disk
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48253
diff changeset
483 }
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
484 (flags, size, mtime)
47348
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
Simon Sapin <simon.sapin@octobus.net>
parents: 47337
diff changeset
485 }
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
Simon Sapin <simon.sapin@octobus.net>
parents: 47337
diff changeset
486 }
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
Simon Sapin <simon.sapin@octobus.net>
parents: 47337
diff changeset
487
47334
18b3060fe598 dirstate-v2: Add a zero-size error type for dirstate v2 parse errors
Simon Sapin <simon.sapin@octobus.net>
parents: 47333
diff changeset
488 fn read_hg_path(
18b3060fe598 dirstate-v2: Add a zero-size error type for dirstate v2 parse errors
Simon Sapin <simon.sapin@octobus.net>
parents: 47333
diff changeset
489 on_disk: &[u8],
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
490 slice: PathSlice,
47337
0654b3b3d2b5 dirstate-v2: Parse the dirstate lazily, with copy-on-write nodes
Simon Sapin <simon.sapin@octobus.net>
parents: 47336
diff changeset
491 ) -> Result<&HgPath, DirstateV2ParseError> {
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
492 read_slice(on_disk, slice.start, slice.len.get()).map(HgPath::new)
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
493 }
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
494
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
495 fn read_nodes(
47334
18b3060fe598 dirstate-v2: Add a zero-size error type for dirstate v2 parse errors
Simon Sapin <simon.sapin@octobus.net>
parents: 47333
diff changeset
496 on_disk: &[u8],
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
497 slice: ChildNodes,
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
498 ) -> Result<&[Node], DirstateV2ParseError> {
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
499 read_slice(on_disk, slice.start, slice.len.get())
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
500 }
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
501
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
502 fn read_slice<T, Len>(
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
503 on_disk: &[u8],
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
504 start: Offset,
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
505 len: Len,
47334
18b3060fe598 dirstate-v2: Add a zero-size error type for dirstate v2 parse errors
Simon Sapin <simon.sapin@octobus.net>
parents: 47333
diff changeset
506 ) -> Result<&[T], DirstateV2ParseError>
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
507 where
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
508 T: BytesCast,
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
509 Len: TryInto<usize>,
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
510 {
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
511 // Either `usize::MAX` would result in "out of bounds" error since a single
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
512 // `&[u8]` cannot occupy the entire addess space.
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
513 let start = start.get().try_into().unwrap_or(std::usize::MAX);
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
514 let len = len.try_into().unwrap_or(std::usize::MAX);
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
515 on_disk
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
516 .get(start..)
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
517 .and_then(|bytes| T::slice_from_bytes(bytes, len).ok())
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
518 .map(|(slice, _rest)| slice)
47334
18b3060fe598 dirstate-v2: Add a zero-size error type for dirstate v2 parse errors
Simon Sapin <simon.sapin@octobus.net>
parents: 47333
diff changeset
519 .ok_or_else(|| DirstateV2ParseError)
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
520 }
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
521
47374
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
522 pub(crate) fn for_each_tracked_path<'on_disk>(
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
523 on_disk: &'on_disk [u8],
47682
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
524 metadata: &[u8],
47374
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
525 mut f: impl FnMut(&'on_disk HgPath),
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
526 ) -> Result<(), DirstateV2ParseError> {
47682
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
527 let (meta, _) = TreeMetadata::from_bytes(metadata)
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
528 .map_err(|_| DirstateV2ParseError)?;
47374
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
529 fn recur<'on_disk>(
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
530 on_disk: &'on_disk [u8],
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
531 nodes: ChildNodes,
47374
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
532 f: &mut impl FnMut(&'on_disk HgPath),
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
533 ) -> Result<(), DirstateV2ParseError> {
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
534 for node in read_nodes(on_disk, nodes)? {
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
535 if let Some(entry) = node.entry()? {
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
536 if entry.state().is_tracked() {
47374
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
537 f(node.full_path(on_disk)?)
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
538 }
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
539 }
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
540 recur(on_disk, node.children, f)?
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
541 }
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
542 Ok(())
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
543 }
47682
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
544 recur(on_disk, meta.root_nodes, &mut f)
47374
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
545 }
bd88b6bfd8da rhg: Add support for dirstate-v2
Simon Sapin <simon.sapin@octobus.net>
parents: 47351
diff changeset
546
47682
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
547 /// Returns new data and metadata, together with whether that data should be
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
548 /// appended to the existing data file whose content is at
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
549 /// `dirstate_map.on_disk` (true), instead of written to a new data file
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
550 /// (false).
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
551 pub(super) fn write(
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
552 dirstate_map: &mut DirstateMap,
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
553 can_append: bool,
47682
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
554 ) -> Result<(Vec<u8>, Vec<u8>, bool), DirstateError> {
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
555 let append = can_append && dirstate_map.write_should_append();
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
556
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
557 // This ignores the space for paths, and for nodes without an entry.
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
558 // TODO: better estimate? Skip the `Vec` and write to a file directly?
47682
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
559 let size_guess = std::mem::size_of::<Node>()
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
560 * dirstate_map.nodes_with_entry_count as usize;
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
561
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
562 let mut writer = Writer {
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
563 dirstate_map,
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
564 append,
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
565 out: Vec::with_capacity(size_guess),
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
566 };
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
567
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
568 let root_nodes = writer.write_nodes(dirstate_map.root.as_ref())?;
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
569
47682
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
570 let meta = TreeMetadata {
47676
096ee2e260a3 dirstate-v2: Rename Header to Root, move it to the end of the data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47675
diff changeset
571 root_nodes,
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
572 nodes_with_entry_count: dirstate_map.nodes_with_entry_count.into(),
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
573 nodes_with_copy_source_count: dirstate_map
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
574 .nodes_with_copy_source_count
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
575 .into(),
47681
d94118365ec5 dirstate-v2: Add heuristic for when to create a new data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47680
diff changeset
576 unreachable_bytes: dirstate_map.unreachable_bytes.into(),
47684
852262e2e7d9 dirstate-v2: Reserve a few bytes of space for future extensions
Simon Sapin <simon.sapin@octobus.net>
parents: 47682
diff changeset
577 unused: [0; 4],
47409
0ef8231e413f dirstate-v2: Store a hash of ignore patterns (.hgignore)
Simon Sapin <simon.sapin@octobus.net>
parents: 47374
diff changeset
578 ignore_patterns_hash: dirstate_map.ignore_patterns_hash,
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
579 };
47682
78f7f0d490ee dirstate-v2: Move fixed-size tree metadata into the docket file
Simon Sapin <simon.sapin@octobus.net>
parents: 47681
diff changeset
580 Ok((writer.out, meta.as_bytes().to_vec(), append))
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
581 }
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
582
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
583 struct Writer<'dmap, 'on_disk> {
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
584 dirstate_map: &'dmap DirstateMap<'on_disk>,
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
585 append: bool,
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
586 out: Vec<u8>,
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
587 }
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
588
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
589 impl Writer<'_, '_> {
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
590 fn write_nodes(
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
591 &mut self,
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
592 nodes: dirstate_map::ChildNodesRef,
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
593 ) -> Result<ChildNodes, DirstateError> {
47679
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
594 // Reuse already-written nodes if possible
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
595 if self.append {
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
596 if let dirstate_map::ChildNodesRef::OnDisk(nodes_slice) = nodes {
47680
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
597 let start = self.on_disk_offset_of(nodes_slice).expect(
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
598 "dirstate-v2 OnDisk nodes not found within on_disk",
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
599 );
47679
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
600 let len = child_nodes_len_from_usize(nodes_slice.len());
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
601 return Ok(ChildNodes { start, len });
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
602 }
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
603 }
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
604
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
605 // `dirstate_map::ChildNodes::InMemory` contains a `HashMap` which has
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
606 // undefined iteration order. Sort to enable binary search in the
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
607 // written file.
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
608 let nodes = nodes.sorted();
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
609 let nodes_len = nodes.len();
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
610
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
611 // First accumulate serialized nodes in a `Vec`
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
612 let mut on_disk_nodes = Vec::with_capacity(nodes_len);
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
613 for node in nodes {
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
614 let children =
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
615 self.write_nodes(node.children(self.dirstate_map.on_disk)?)?;
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
616 let full_path = node.full_path(self.dirstate_map.on_disk)?;
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
617 let full_path = self.write_path(full_path.as_bytes());
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
618 let copy_source = if let Some(source) =
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
619 node.copy_source(self.dirstate_map.on_disk)?
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
620 {
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
621 self.write_path(source.as_bytes())
47336
8d0260d0dbc9 dirstate-v2: Make the dirstate bytes buffer available in more places
Simon Sapin <simon.sapin@octobus.net>
parents: 47335
diff changeset
622 } else {
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
623 PathSlice {
47336
8d0260d0dbc9 dirstate-v2: Make the dirstate bytes buffer available in more places
Simon Sapin <simon.sapin@octobus.net>
parents: 47335
diff changeset
624 start: 0.into(),
8d0260d0dbc9 dirstate-v2: Make the dirstate bytes buffer available in more places
Simon Sapin <simon.sapin@octobus.net>
parents: 47335
diff changeset
625 len: 0.into(),
8d0260d0dbc9 dirstate-v2: Make the dirstate bytes buffer available in more places
Simon Sapin <simon.sapin@octobus.net>
parents: 47335
diff changeset
626 }
8d0260d0dbc9 dirstate-v2: Make the dirstate bytes buffer available in more places
Simon Sapin <simon.sapin@octobus.net>
parents: 47335
diff changeset
627 };
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
628 on_disk_nodes.push(match node {
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
629 NodeRef::InMemory(path, node) => {
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
630 let (flags, size, mtime) = match &node.data {
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
631 dirstate_map::NodeData::Entry(entry) => {
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
632 Node::from_dirstate_entry(entry)
48139
ab5a7fdbf75c dirstate-v2: Store a bitfield on disk instead of v1-like state
Simon Sapin <simon.sapin@octobus.net>
parents: 48022
diff changeset
633 }
48232
f7fd629ffb98 dirstate-v2: Separate HAS_FILE_MTIME and HAS_DIRECTORY_MTIME flags
Simon Sapin <simon.sapin@octobus.net>
parents: 48231
diff changeset
634 dirstate_map::NodeData::CachedDirectory { mtime } => (
48251
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
635 // we currently never set a mtime if unknown file
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
636 // are present.
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
637 // So if we have a mtime for a directory, we know
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
638 // they are no unknown
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
639 // files and we
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
640 // blindly set ALL_UNKNOWN_RECORDED.
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
641 //
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
642 // We never set ALL_IGNORED_RECORDED since we
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
643 // don't track that case
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
644 // currently.
48264
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
645 Flags::DIRECTORY
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
646 | Flags::HAS_MTIME
48251
dfc5a505ddc5 dirstate-v2: adds two flag to track the presence of some unrecorded files
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48250
diff changeset
647 | Flags::ALL_UNKNOWN_RECORDED,
48232
f7fd629ffb98 dirstate-v2: Separate HAS_FILE_MTIME and HAS_DIRECTORY_MTIME flags
Simon Sapin <simon.sapin@octobus.net>
parents: 48231
diff changeset
648 0.into(),
f7fd629ffb98 dirstate-v2: Separate HAS_FILE_MTIME and HAS_DIRECTORY_MTIME flags
Simon Sapin <simon.sapin@octobus.net>
parents: 48231
diff changeset
649 (*mtime).into(),
f7fd629ffb98 dirstate-v2: Separate HAS_FILE_MTIME and HAS_DIRECTORY_MTIME flags
Simon Sapin <simon.sapin@octobus.net>
parents: 48231
diff changeset
650 ),
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
651 dirstate_map::NodeData::None => (
48264
bb240915f69f dirstate-v2: adjust the meaning of directory flags
Pierre-Yves David <pierre-yves.david@octobus.net>
parents: 48263
diff changeset
652 Flags::DIRECTORY,
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
653 0.into(),
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
654 PackedTruncatedTimestamp::null(),
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
655 ),
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
656 };
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
657 Node {
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
658 children,
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
659 copy_source,
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
660 full_path,
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
661 base_name_start: u16::try_from(path.base_name_start())
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
662 // Could only panic for paths over 64 KiB
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
663 .expect("dirstate-v2 path length overflow")
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
664 .into(),
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
665 descendants_with_entry_count: node
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
666 .descendants_with_entry_count
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
667 .into(),
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
668 tracked_descendants_count: node
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
669 .tracked_descendants_count
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
670 .into(),
48231
0524c1359bfc dirstate-v2: Extend node flags to 16 bits
Simon Sapin <simon.sapin@octobus.net>
parents: 48221
diff changeset
671 flags: flags.bits().into(),
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
672 size,
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
673 mtime,
47333
69530e5d4fe5 dirstate-tree: Add `NodeRef` and `ChildNodesRef` enums
Simon Sapin <simon.sapin@octobus.net>
parents: 47331
diff changeset
674 }
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
675 }
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
676 NodeRef::OnDisk(node) => Node {
47348
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
Simon Sapin <simon.sapin@octobus.net>
parents: 47337
diff changeset
677 children,
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
Simon Sapin <simon.sapin@octobus.net>
parents: 47337
diff changeset
678 copy_source,
a4de570e61fa dirstate-v2: Allow tree nodes without an entry to store a timestamp
Simon Sapin <simon.sapin@octobus.net>
parents: 47337
diff changeset
679 full_path,
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
680 ..*node
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
681 },
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
682 })
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
683 }
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
684 // … so we can write them contiguously, after writing everything else
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
685 // they refer to.
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
686 let start = self.current_offset();
47679
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
687 let len = child_nodes_len_from_usize(nodes_len);
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
688 self.out.extend(on_disk_nodes.as_bytes());
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
689 Ok(ChildNodes { start, len })
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
690 }
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
691
47680
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
692 /// If the given slice of items is within `on_disk`, returns its offset
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
693 /// from the start of `on_disk`.
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
694 fn on_disk_offset_of<T>(&self, slice: &[T]) -> Option<Offset>
47679
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
695 where
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
696 T: BytesCast,
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
697 {
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
698 fn address_range(slice: &[u8]) -> std::ops::RangeInclusive<usize> {
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
699 let start = slice.as_ptr() as usize;
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
700 let end = start + slice.len();
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
701 start..=end
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
702 }
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
703 let slice_addresses = address_range(slice.as_bytes());
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
704 let on_disk_addresses = address_range(self.dirstate_map.on_disk);
47680
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
705 if on_disk_addresses.contains(slice_addresses.start())
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
706 && on_disk_addresses.contains(slice_addresses.end())
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
707 {
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
708 let offset = slice_addresses.start() - on_disk_addresses.start();
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
709 Some(offset_from_usize(offset))
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
710 } else {
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
711 None
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
712 }
47679
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
713 }
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
714
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
715 fn current_offset(&mut self) -> Offset {
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
716 let mut offset = self.out.len();
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
717 if self.append {
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
718 offset += self.dirstate_map.on_disk.len()
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
719 }
47679
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
720 offset_from_usize(offset)
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
721 }
47677
da1c0cd68d53 dirstate-v2: shrink on-disk path lengths to 16-bits
Simon Sapin <simon.sapin@octobus.net>
parents: 47676
diff changeset
722
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
723 fn write_path(&mut self, slice: &[u8]) -> PathSlice {
47680
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
724 let len = path_len_from_usize(slice.len());
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
725 // Reuse an already-written path if possible
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
726 if self.append {
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
727 if let Some(start) = self.on_disk_offset_of(slice) {
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
728 return PathSlice { start, len };
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
729 }
a8b0f29dc0d7 dirstate-v2: Reuse existing paths when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47679
diff changeset
730 }
47678
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
731 let start = self.current_offset();
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
732 self.out.extend(slice.as_bytes());
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
733 PathSlice { start, len }
065e61628980 dirstate-v2: Support appending to the same data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47677
diff changeset
734 }
47283
2a9ddc8094c7 dirstate-v2: Change the on-disk format to be tree-shaped
Simon Sapin <simon.sapin@octobus.net>
parents: 47280
diff changeset
735 }
47679
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
736
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
737 fn offset_from_usize(x: usize) -> Offset {
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
738 u32::try_from(x)
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
739 // Could only panic for a dirstate file larger than 4 GiB
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
740 .expect("dirstate-v2 offset overflow")
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
741 .into()
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
742 }
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
743
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
744 fn child_nodes_len_from_usize(x: usize) -> Size {
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
745 u32::try_from(x)
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
746 // Could only panic with over 4 billion nodes
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
747 .expect("dirstate-v2 slice length overflow")
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
748 .into()
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
749 }
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
750
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
751 fn path_len_from_usize(x: usize) -> PathSize {
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
752 u16::try_from(x)
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
753 // Could only panic for paths over 64 KiB
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
754 .expect("dirstate-v2 path length overflow")
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
755 .into()
731286dc5321 dirstate-v2: Reuse existing nodes when appending to a data file
Simon Sapin <simon.sapin@octobus.net>
parents: 47678
diff changeset
756 }
48219
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
757
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
758 impl From<TruncatedTimestamp> for PackedTruncatedTimestamp {
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
759 fn from(timestamp: TruncatedTimestamp) -> Self {
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
760 Self {
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
761 truncated_seconds: timestamp.truncated_seconds().into(),
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
762 nanoseconds: timestamp.nanoseconds().into(),
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
763 }
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
764 }
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
765 }
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
766
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
767 impl TryFrom<PackedTruncatedTimestamp> for TruncatedTimestamp {
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
768 type Error = DirstateV2ParseError;
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
769
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
770 fn try_from(
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
771 timestamp: PackedTruncatedTimestamp,
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
772 ) -> Result<Self, Self::Error> {
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
773 Self::from_already_truncated(
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
774 timestamp.truncated_seconds.get(),
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
775 timestamp.nanoseconds.get(),
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
776 )
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
777 }
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
778 }
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
779 impl PackedTruncatedTimestamp {
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
780 fn null() -> Self {
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
781 Self {
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
782 truncated_seconds: 0.into(),
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
783 nanoseconds: 0.into(),
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
784 }
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
785 }
308d9c245337 dirstate-v2: Add storage space for nanoseconds precision in file mtimes
Simon Sapin <simon.sapin@octobus.net>
parents: 48196
diff changeset
786 }