Mercurial > hg
annotate rust/rhg/src/commands/status.rs @ 47682:78f7f0d490ee
dirstate-v2: Move fixed-size tree metadata into the docket file
Before this changeset, the dirstate-v2 data file contained not only nodes
and paths that may be reused when appending to an existing file,
but also some fixed-size metadata that applies to the entire tree
and was added at the end of the data file for every append.
This moves that metadata into the docket file, so that repeated "append"
operations without meaningful changes don’t actually need to grow any file.
Differential Revision: https://phab.mercurial-scm.org/D11098
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Thu, 15 Jul 2021 23:02:17 +0200 |
parents | 48aec076b8fb |
children | 81aedf1fc897 |
rev | line source |
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1 // status.rs |
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2 // |
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3 // Copyright 2020, Georges Racinet <georges.racinets@octobus.net> |
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4 // |
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5 // This software may be used and distributed according to the terms of the |
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6 // GNU General Public License version 2 or any later version. |
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7 |
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8 use crate::error::CommandError; |
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9 use crate::ui::Ui; |
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10 use clap::{Arg, SubCommand}; |
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11 use hg; |
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12 use hg::dirstate_tree::dirstate_map::DirstateMap; |
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13 use hg::dirstate_tree::on_disk; |
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14 use hg::errors::HgResultExt; |
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15 use hg::errors::IoResultExt; |
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16 use hg::matchers::AlwaysMatcher; |
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17 use hg::operations::cat; |
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18 use hg::repo::Repo; |
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19 use hg::revlog::node::Node; |
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20 use hg::utils::hg_path::{hg_path_to_os_string, HgPath}; |
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21 use hg::StatusError; |
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22 use hg::{HgPathCow, StatusOptions}; |
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23 use log::{info, warn}; |
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24 use std::convert::TryInto; |
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25 use std::fs; |
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26 use std::io::BufReader; |
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27 use std::io::Read; |
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28 |
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29 pub const HELP_TEXT: &str = " |
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30 Show changed files in the working directory |
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31 |
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32 This is a pure Rust version of `hg status`. |
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33 |
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34 Some options might be missing, check the list below. |
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35 "; |
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36 |
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37 pub fn args() -> clap::App<'static, 'static> { |
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38 SubCommand::with_name("status") |
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39 .alias("st") |
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40 .about(HELP_TEXT) |
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41 .arg( |
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42 Arg::with_name("all") |
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43 .help("show status of all files") |
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44 .short("-A") |
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45 .long("--all"), |
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46 ) |
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47 .arg( |
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48 Arg::with_name("modified") |
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49 .help("show only modified files") |
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50 .short("-m") |
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51 .long("--modified"), |
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52 ) |
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53 .arg( |
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54 Arg::with_name("added") |
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55 .help("show only added files") |
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56 .short("-a") |
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57 .long("--added"), |
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58 ) |
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59 .arg( |
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60 Arg::with_name("removed") |
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61 .help("show only removed files") |
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62 .short("-r") |
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63 .long("--removed"), |
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64 ) |
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65 .arg( |
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66 Arg::with_name("clean") |
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67 .help("show only clean files") |
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68 .short("-c") |
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69 .long("--clean"), |
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70 ) |
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71 .arg( |
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72 Arg::with_name("deleted") |
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73 .help("show only deleted files") |
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74 .short("-d") |
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75 .long("--deleted"), |
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76 ) |
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77 .arg( |
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78 Arg::with_name("unknown") |
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79 .help("show only unknown (not tracked) files") |
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80 .short("-u") |
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81 .long("--unknown"), |
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82 ) |
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83 .arg( |
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84 Arg::with_name("ignored") |
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85 .help("show only ignored files") |
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86 .short("-i") |
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87 .long("--ignored"), |
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88 ) |
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89 } |
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90 |
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91 /// Pure data type allowing the caller to specify file states to display |
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92 #[derive(Copy, Clone, Debug)] |
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93 pub struct DisplayStates { |
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94 pub modified: bool, |
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95 pub added: bool, |
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96 pub removed: bool, |
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97 pub clean: bool, |
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98 pub deleted: bool, |
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99 pub unknown: bool, |
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100 pub ignored: bool, |
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101 } |
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102 |
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103 pub const DEFAULT_DISPLAY_STATES: DisplayStates = DisplayStates { |
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104 modified: true, |
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105 added: true, |
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106 removed: true, |
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107 clean: false, |
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108 deleted: true, |
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109 unknown: true, |
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110 ignored: false, |
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111 }; |
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112 |
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113 pub const ALL_DISPLAY_STATES: DisplayStates = DisplayStates { |
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114 modified: true, |
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115 added: true, |
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116 removed: true, |
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117 clean: true, |
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118 deleted: true, |
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119 unknown: true, |
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120 ignored: true, |
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121 }; |
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122 |
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123 impl DisplayStates { |
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124 pub fn is_empty(&self) -> bool { |
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125 !(self.modified |
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126 || self.added |
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127 || self.removed |
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128 || self.clean |
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129 || self.deleted |
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130 || self.unknown |
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131 || self.ignored) |
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132 } |
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133 } |
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134 |
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135 pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> { |
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136 let status_enabled_default = false; |
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137 let status_enabled = invocation.config.get_option(b"rhg", b"status")?; |
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138 if !status_enabled.unwrap_or(status_enabled_default) { |
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139 return Err(CommandError::unsupported( |
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140 "status is experimental in rhg (enable it with 'rhg.status = true' \ |
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141 or enable fallback with 'rhg.on-unsupported = fallback')" |
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142 )); |
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143 } |
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144 |
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145 let ui = invocation.ui; |
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146 let args = invocation.subcommand_args; |
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147 let display_states = if args.is_present("all") { |
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148 // TODO when implementing `--quiet`: it excludes clean files |
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149 // from `--all` |
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150 ALL_DISPLAY_STATES |
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151 } else { |
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152 let requested = DisplayStates { |
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153 modified: args.is_present("modified"), |
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154 added: args.is_present("added"), |
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155 removed: args.is_present("removed"), |
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156 clean: args.is_present("clean"), |
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157 deleted: args.is_present("deleted"), |
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158 unknown: args.is_present("unknown"), |
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159 ignored: args.is_present("ignored"), |
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160 }; |
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161 if requested.is_empty() { |
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162 DEFAULT_DISPLAY_STATES |
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163 } else { |
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164 requested |
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165 } |
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166 }; |
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167 |
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168 let repo = invocation.repo?; |
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169 let dirstate_data_mmap; |
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170 let (mut dmap, parents) = if repo.has_dirstate_v2() { |
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171 let docket_data = |
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172 repo.hg_vfs().read("dirstate").io_not_found_as_none()?; |
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173 let parents; |
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174 let dirstate_data; |
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175 let data_size; |
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176 let docket; |
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177 let tree_metadata; |
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178 if let Some(docket_data) = &docket_data { |
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179 docket = on_disk::read_docket(docket_data)?; |
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180 tree_metadata = docket.tree_metadata(); |
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181 parents = Some(docket.parents()); |
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182 data_size = docket.data_size(); |
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183 dirstate_data_mmap = repo |
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184 .hg_vfs() |
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185 .mmap_open(docket.data_filename()) |
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186 .io_not_found_as_none()?; |
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187 dirstate_data = dirstate_data_mmap.as_deref().unwrap_or(b""); |
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188 } else { |
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189 parents = None; |
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190 tree_metadata = b""; |
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191 data_size = 0; |
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192 dirstate_data = b""; |
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193 } |
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194 let dmap = |
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195 DirstateMap::new_v2(dirstate_data, data_size, tree_metadata)?; |
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196 (dmap, parents) |
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197 } else { |
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198 dirstate_data_mmap = |
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199 repo.hg_vfs().mmap_open("dirstate").io_not_found_as_none()?; |
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200 let dirstate_data = dirstate_data_mmap.as_deref().unwrap_or(b""); |
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201 DirstateMap::new_v1(dirstate_data)? |
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202 }; |
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203 |
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204 let options = StatusOptions { |
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205 // TODO should be provided by the dirstate parsing and |
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206 // hence be stored on dmap. Using a value that assumes we aren't |
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207 // below the time resolution granularity of the FS and the |
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208 // dirstate. |
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209 last_normal_time: 0, |
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210 // we're currently supporting file systems with exec flags only |
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211 // anyway |
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212 check_exec: true, |
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213 list_clean: display_states.clean, |
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214 list_unknown: display_states.unknown, |
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215 list_ignored: display_states.ignored, |
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216 collect_traversed_dirs: false, |
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217 }; |
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218 let ignore_file = repo.working_directory_vfs().join(".hgignore"); // TODO hardcoded |
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219 let (mut ds_status, pattern_warnings) = hg::dirstate_tree::status::status( |
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220 &mut dmap, |
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221 &AlwaysMatcher, |
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222 repo.working_directory_path().to_owned(), |
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223 vec![ignore_file], |
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224 options, |
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225 )?; |
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226 if !pattern_warnings.is_empty() { |
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227 warn!("Pattern warnings: {:?}", &pattern_warnings); |
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228 } |
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229 |
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230 if !ds_status.bad.is_empty() { |
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231 warn!("Bad matches {:?}", &(ds_status.bad)) |
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232 } |
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233 if !ds_status.unsure.is_empty() { |
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234 info!( |
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235 "Files to be rechecked by retrieval from filelog: {:?}", |
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236 &ds_status.unsure |
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237 ); |
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238 } |
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239 if !ds_status.unsure.is_empty() |
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240 && (display_states.modified || display_states.clean) |
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241 { |
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242 let p1: Node = parents |
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243 .expect( |
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244 "Dirstate with no parents should not list any file to |
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245 be rechecked for modifications", |
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246 ) |
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247 .p1 |
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248 .into(); |
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249 let p1_hex = format!("{:x}", p1); |
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250 for to_check in ds_status.unsure { |
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251 if cat_file_is_modified(repo, &to_check, &p1_hex)? { |
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252 if display_states.modified { |
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253 ds_status.modified.push(to_check); |
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254 } |
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255 } else { |
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256 if display_states.clean { |
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257 ds_status.clean.push(to_check); |
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258 } |
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259 } |
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260 } |
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261 } |
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262 if display_states.modified { |
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263 display_status_paths(ui, &mut ds_status.modified, b"M")?; |
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264 } |
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265 if display_states.added { |
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266 display_status_paths(ui, &mut ds_status.added, b"A")?; |
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267 } |
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268 if display_states.removed { |
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269 display_status_paths(ui, &mut ds_status.removed, b"R")?; |
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270 } |
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271 if display_states.deleted { |
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272 display_status_paths(ui, &mut ds_status.deleted, b"!")?; |
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273 } |
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274 if display_states.unknown { |
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275 display_status_paths(ui, &mut ds_status.unknown, b"?")?; |
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276 } |
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277 if display_states.ignored { |
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278 display_status_paths(ui, &mut ds_status.ignored, b"I")?; |
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279 } |
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280 if display_states.clean { |
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281 display_status_paths(ui, &mut ds_status.clean, b"C")?; |
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282 } |
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283 Ok(()) |
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284 } |
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285 |
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286 // Probably more elegant to use a Deref or Borrow trait rather than |
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287 // harcode HgPathBuf, but probably not really useful at this point |
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288 fn display_status_paths( |
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289 ui: &Ui, |
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290 paths: &mut [HgPathCow], |
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291 status_prefix: &[u8], |
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292 ) -> Result<(), CommandError> { |
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293 paths.sort_unstable(); |
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294 for path in paths { |
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295 // Same TODO as in commands::root |
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296 let bytes: &[u8] = path.as_bytes(); |
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297 // TODO optim, probably lots of unneeded copies here, especially |
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298 // if out stream is buffered |
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299 ui.write_stdout(&[status_prefix, b" ", bytes, b"\n"].concat())?; |
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300 } |
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301 Ok(()) |
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302 } |
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303 |
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304 /// Check if a file is modified by comparing actual repo store and file system. |
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305 /// |
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306 /// This meant to be used for those that the dirstate cannot resolve, due |
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307 /// to time resolution limits. |
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308 /// |
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309 /// TODO: detect permission bits and similar metadata modifications |
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310 fn cat_file_is_modified( |
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311 repo: &Repo, |
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312 hg_path: &HgPath, |
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313 rev: &str, |
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314 ) -> Result<bool, CommandError> { |
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315 // TODO CatRev expects &[HgPathBuf], something like |
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316 // &[impl Deref<HgPath>] would be nicer and should avoid the copy |
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317 let path_bufs = [hg_path.into()]; |
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318 // TODO IIUC CatRev returns a simple Vec<u8> for all files |
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319 // being able to tell them apart as (path, bytes) would be nicer |
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320 // and OPTIM would allow manifest resolution just once. |
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321 let output = cat(repo, rev, &path_bufs).map_err(|e| (e, rev))?; |
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322 |
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323 let fs_path = repo |
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324 .working_directory_vfs() |
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325 .join(hg_path_to_os_string(hg_path).expect("HgPath conversion")); |
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326 let hg_data_len: u64 = match output.concatenated.len().try_into() { |
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327 Ok(v) => v, |
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328 Err(_) => { |
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329 // conversion of data length to u64 failed, |
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330 // good luck for any file to have this content |
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331 return Ok(true); |
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332 } |
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333 }; |
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334 let fobj = fs::File::open(&fs_path).when_reading_file(&fs_path)?; |
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335 if fobj.metadata().map_err(|e| StatusError::from(e))?.len() != hg_data_len |
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336 { |
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337 return Ok(true); |
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338 } |
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339 for (fs_byte, hg_byte) in |
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340 BufReader::new(fobj).bytes().zip(output.concatenated) |
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341 { |
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342 if fs_byte.map_err(|e| StatusError::from(e))? != hg_byte { |
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343 return Ok(true); |
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344 } |
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345 } |
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346 Ok(false) |
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347 } |