Mercurial > hg
annotate rust/rhg/src/commands/status.rs @ 49374:455fce57e89e stable
rust: don't swallow valuable error information
This helps when diagnosing corruption, and is in general good practice. The
information is here, valuable and can be used easily.
author | Raphaël Gomès <rgomes@octobus.net> |
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date | Wed, 18 May 2022 15:53:28 +0100 |
parents | 4d3f6767319f |
children | b07465adbcc8 |
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 crate::utils::path_utils::RelativizePaths; |
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11 use clap::{Arg, SubCommand}; |
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12 use format_bytes::format_bytes; |
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13 use hg; |
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14 use hg::config::Config; |
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15 use hg::dirstate::has_exec_bit; |
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16 use hg::dirstate::status::StatusPath; |
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17 use hg::dirstate::TruncatedTimestamp; |
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18 use hg::errors::{HgError, IoResultExt}; |
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19 use hg::lock::LockError; |
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20 use hg::manifest::Manifest; |
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21 use hg::matchers::AlwaysMatcher; |
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22 use hg::repo::Repo; |
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23 use hg::utils::files::get_bytes_from_os_string; |
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24 use hg::utils::files::get_bytes_from_path; |
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25 use hg::utils::files::get_path_from_bytes; |
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26 use hg::utils::hg_path::{hg_path_to_path_buf, HgPath}; |
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27 use hg::DirstateStatus; |
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28 use hg::PatternFileWarning; |
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29 use hg::StatusError; |
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30 use hg::StatusOptions; |
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31 use log::info; |
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32 use std::io; |
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33 use std::path::PathBuf; |
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34 |
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35 pub const HELP_TEXT: &str = " |
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36 Show changed files in the working directory |
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37 |
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38 This is a pure Rust version of `hg status`. |
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39 |
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40 Some options might be missing, check the list below. |
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41 "; |
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42 |
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43 pub fn args() -> clap::App<'static, 'static> { |
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44 SubCommand::with_name("status") |
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45 .alias("st") |
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46 .about(HELP_TEXT) |
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47 .arg( |
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48 Arg::with_name("all") |
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49 .help("show status of all files") |
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50 .short("-A") |
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51 .long("--all"), |
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52 ) |
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53 .arg( |
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54 Arg::with_name("modified") |
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55 .help("show only modified files") |
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56 .short("-m") |
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57 .long("--modified"), |
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58 ) |
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59 .arg( |
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60 Arg::with_name("added") |
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61 .help("show only added files") |
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62 .short("-a") |
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63 .long("--added"), |
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64 ) |
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65 .arg( |
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66 Arg::with_name("removed") |
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67 .help("show only removed files") |
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68 .short("-r") |
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69 .long("--removed"), |
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70 ) |
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71 .arg( |
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72 Arg::with_name("clean") |
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73 .help("show only clean files") |
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74 .short("-c") |
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75 .long("--clean"), |
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76 ) |
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77 .arg( |
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78 Arg::with_name("deleted") |
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79 .help("show only deleted files") |
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80 .short("-d") |
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81 .long("--deleted"), |
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82 ) |
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83 .arg( |
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84 Arg::with_name("unknown") |
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85 .help("show only unknown (not tracked) files") |
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86 .short("-u") |
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87 .long("--unknown"), |
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88 ) |
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89 .arg( |
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90 Arg::with_name("ignored") |
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91 .help("show only ignored files") |
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92 .short("-i") |
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93 .long("--ignored"), |
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94 ) |
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95 .arg( |
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96 Arg::with_name("copies") |
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97 .help("show source of copied files (DEFAULT: ui.statuscopies)") |
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98 .short("-C") |
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99 .long("--copies"), |
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100 ) |
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101 .arg( |
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102 Arg::with_name("no-status") |
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103 .help("hide status prefix") |
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104 .short("-n") |
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105 .long("--no-status"), |
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106 ) |
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107 } |
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108 |
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109 /// Pure data type allowing the caller to specify file states to display |
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110 #[derive(Copy, Clone, Debug)] |
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111 pub struct DisplayStates { |
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112 pub modified: bool, |
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113 pub added: bool, |
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114 pub removed: bool, |
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115 pub clean: bool, |
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116 pub deleted: bool, |
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117 pub unknown: bool, |
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118 pub ignored: bool, |
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119 } |
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120 |
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121 pub const DEFAULT_DISPLAY_STATES: DisplayStates = DisplayStates { |
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122 modified: true, |
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123 added: true, |
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124 removed: true, |
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125 clean: false, |
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126 deleted: true, |
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127 unknown: true, |
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128 ignored: false, |
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129 }; |
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130 |
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131 pub const ALL_DISPLAY_STATES: DisplayStates = DisplayStates { |
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132 modified: true, |
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133 added: true, |
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134 removed: true, |
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135 clean: true, |
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136 deleted: true, |
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137 unknown: true, |
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138 ignored: true, |
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139 }; |
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140 |
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141 impl DisplayStates { |
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142 pub fn is_empty(&self) -> bool { |
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143 !(self.modified |
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144 || self.added |
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145 || self.removed |
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146 || self.clean |
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147 || self.deleted |
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148 || self.unknown |
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149 || self.ignored) |
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150 } |
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151 } |
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152 |
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153 pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> { |
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154 // TODO: lift these limitations |
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155 if invocation.config.get_bool(b"ui", b"tweakdefaults")? { |
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156 return Err(CommandError::unsupported( |
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157 "ui.tweakdefaults is not yet supported with rhg status", |
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158 )); |
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159 } |
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160 if invocation.config.get_bool(b"ui", b"statuscopies")? { |
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161 return Err(CommandError::unsupported( |
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162 "ui.statuscopies is not yet supported with rhg status", |
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163 )); |
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164 } |
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165 if invocation |
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166 .config |
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167 .get(b"commands", b"status.terse") |
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168 .is_some() |
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169 { |
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170 return Err(CommandError::unsupported( |
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171 "status.terse is not yet supported with rhg status", |
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172 )); |
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173 } |
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174 |
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175 let ui = invocation.ui; |
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176 let config = invocation.config; |
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177 let args = invocation.subcommand_args; |
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178 |
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179 let verbose = !ui.plain(None) |
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180 && !args.is_present("print0") |
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181 && (config.get_bool(b"ui", b"verbose")? |
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182 || config.get_bool(b"commands", b"status.verbose")?); |
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183 if verbose { |
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184 return Err(CommandError::unsupported( |
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185 "verbose status is not supported yet", |
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186 )); |
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187 } |
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188 |
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189 let all = args.is_present("all"); |
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190 let display_states = if all { |
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191 // TODO when implementing `--quiet`: it excludes clean files |
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192 // from `--all` |
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193 ALL_DISPLAY_STATES |
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194 } else { |
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195 let requested = DisplayStates { |
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196 modified: args.is_present("modified"), |
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197 added: args.is_present("added"), |
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198 removed: args.is_present("removed"), |
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199 clean: args.is_present("clean"), |
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200 deleted: args.is_present("deleted"), |
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201 unknown: args.is_present("unknown"), |
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202 ignored: args.is_present("ignored"), |
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203 }; |
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204 if requested.is_empty() { |
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205 DEFAULT_DISPLAY_STATES |
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206 } else { |
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207 requested |
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208 } |
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209 }; |
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210 let no_status = args.is_present("no-status"); |
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211 let list_copies = all |
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212 || args.is_present("copies") |
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213 || config.get_bool(b"ui", b"statuscopies")?; |
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214 |
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215 let repo = invocation.repo?; |
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216 |
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217 if repo.has_sparse() || repo.has_narrow() { |
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218 return Err(CommandError::unsupported( |
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219 "rhg status is not supported for sparse checkouts or narrow clones yet" |
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220 )); |
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221 } |
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222 |
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223 let mut dmap = repo.dirstate_map_mut()?; |
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224 |
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225 let options = StatusOptions { |
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226 // we're currently supporting file systems with exec flags only |
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227 // anyway |
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228 check_exec: true, |
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229 list_clean: display_states.clean, |
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230 list_unknown: display_states.unknown, |
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231 list_ignored: display_states.ignored, |
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232 list_copies, |
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233 collect_traversed_dirs: false, |
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234 }; |
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235 |
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236 type StatusResult<'a> = |
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237 Result<(DirstateStatus<'a>, Vec<PatternFileWarning>), StatusError>; |
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238 |
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239 let after_status = |res: StatusResult| -> Result<_, CommandError> { |
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240 let (mut ds_status, pattern_warnings) = res?; |
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241 for warning in pattern_warnings { |
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242 match warning { |
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243 hg::PatternFileWarning::InvalidSyntax(path, syntax) => ui |
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244 .write_stderr(&format_bytes!( |
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245 b"{}: ignoring invalid syntax '{}'\n", |
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246 get_bytes_from_path(path), |
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247 &*syntax |
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248 ))?, |
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249 hg::PatternFileWarning::NoSuchFile(path) => { |
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250 let path = if let Ok(relative) = |
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251 path.strip_prefix(repo.working_directory_path()) |
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252 { |
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253 relative |
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254 } else { |
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255 &*path |
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256 }; |
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257 ui.write_stderr(&format_bytes!( |
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258 b"skipping unreadable pattern file '{}': \ |
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259 No such file or directory\n", |
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260 get_bytes_from_path(path), |
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261 ))? |
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262 } |
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263 } |
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264 } |
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265 |
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266 for (path, error) in ds_status.bad { |
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267 let error = match error { |
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268 hg::BadMatch::OsError(code) => { |
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269 std::io::Error::from_raw_os_error(code).to_string() |
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270 } |
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271 hg::BadMatch::BadType(ty) => { |
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272 format!("unsupported file type (type is {})", ty) |
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273 } |
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274 }; |
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275 ui.write_stderr(&format_bytes!( |
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276 b"{}: {}\n", |
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277 path.as_bytes(), |
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278 error.as_bytes() |
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279 ))? |
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280 } |
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281 if !ds_status.unsure.is_empty() { |
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282 info!( |
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283 "Files to be rechecked by retrieval from filelog: {:?}", |
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284 ds_status.unsure.iter().map(|s| &s.path).collect::<Vec<_>>() |
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285 ); |
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286 } |
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287 let mut fixup = Vec::new(); |
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288 if !ds_status.unsure.is_empty() |
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289 && (display_states.modified || display_states.clean) |
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290 { |
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291 let p1 = repo.dirstate_parents()?.p1; |
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292 let manifest = repo.manifest_for_node(p1).map_err(|e| { |
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293 CommandError::from((e, &*format!("{:x}", p1.short()))) |
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294 })?; |
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295 for to_check in ds_status.unsure { |
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296 if unsure_is_modified(repo, &manifest, &to_check.path)? { |
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297 if display_states.modified { |
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298 ds_status.modified.push(to_check); |
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299 } |
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300 } else { |
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301 if display_states.clean { |
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302 ds_status.clean.push(to_check.clone()); |
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303 } |
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304 fixup.push(to_check.path.into_owned()) |
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305 } |
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306 } |
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307 } |
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308 let relative_paths = (!ui.plain(None)) |
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309 && config |
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310 .get_option(b"commands", b"status.relative")? |
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311 .unwrap_or(config.get_bool(b"ui", b"relative-paths")?); |
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312 let output = DisplayStatusPaths { |
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313 ui, |
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314 no_status, |
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315 relativize: if relative_paths { |
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316 Some(RelativizePaths::new(repo)?) |
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317 } else { |
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318 None |
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319 }, |
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320 }; |
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321 if display_states.modified { |
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322 output.display(b"M ", "status.modified", ds_status.modified)?; |
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323 } |
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324 if display_states.added { |
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325 output.display(b"A ", "status.added", ds_status.added)?; |
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326 } |
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327 if display_states.removed { |
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328 output.display(b"R ", "status.removed", ds_status.removed)?; |
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329 } |
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330 if display_states.deleted { |
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331 output.display(b"! ", "status.deleted", ds_status.deleted)?; |
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332 } |
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333 if display_states.unknown { |
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334 output.display(b"? ", "status.unknown", ds_status.unknown)?; |
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335 } |
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336 if display_states.ignored { |
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337 output.display(b"I ", "status.ignored", ds_status.ignored)?; |
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338 } |
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339 if display_states.clean { |
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340 output.display(b"C ", "status.clean", ds_status.clean)?; |
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341 } |
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342 |
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343 let dirstate_write_needed = ds_status.dirty; |
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344 let filesystem_time_at_status_start = |
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345 ds_status.filesystem_time_at_status_start; |
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346 |
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347 Ok(( |
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348 fixup, |
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349 dirstate_write_needed, |
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350 filesystem_time_at_status_start, |
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351 )) |
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352 }; |
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353 let (fixup, mut dirstate_write_needed, filesystem_time_at_status_start) = |
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354 dmap.with_status( |
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355 &AlwaysMatcher, |
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356 repo.working_directory_path().to_owned(), |
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357 ignore_files(repo, config), |
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358 options, |
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359 after_status, |
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360 )?; |
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361 |
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362 if (fixup.is_empty() || filesystem_time_at_status_start.is_none()) |
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363 && !dirstate_write_needed |
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364 { |
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365 // Nothing to update |
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366 return Ok(()); |
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367 } |
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368 |
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369 // Update the dirstate on disk if we can |
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370 let with_lock_result = |
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371 repo.try_with_wlock_no_wait(|| -> Result<(), CommandError> { |
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372 if let Some(mtime_boundary) = filesystem_time_at_status_start { |
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373 for hg_path in fixup { |
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374 use std::os::unix::fs::MetadataExt; |
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375 let fs_path = hg_path_to_path_buf(&hg_path) |
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376 .expect("HgPath conversion"); |
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377 // Specifically do not reuse `fs_metadata` from |
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378 // `unsure_is_clean` which was needed before reading |
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379 // contents. Here we access metadata again after reading |
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380 // content, in case it changed in the meantime. |
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381 let fs_metadata = repo |
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382 .working_directory_vfs() |
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383 .symlink_metadata(&fs_path)?; |
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384 if let Some(mtime) = |
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385 TruncatedTimestamp::for_reliable_mtime_of( |
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386 &fs_metadata, |
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387 &mtime_boundary, |
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388 ) |
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389 .when_reading_file(&fs_path)? |
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390 { |
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391 let mode = fs_metadata.mode(); |
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392 let size = fs_metadata.len(); |
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393 dmap.set_clean(&hg_path, mode, size as u32, mtime)?; |
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394 dirstate_write_needed = true |
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395 } |
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396 } |
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397 } |
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398 drop(dmap); // Avoid "already mutably borrowed" RefCell panics |
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399 if dirstate_write_needed { |
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400 repo.write_dirstate()? |
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401 } |
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402 Ok(()) |
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403 }); |
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404 match with_lock_result { |
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405 Ok(closure_result) => closure_result?, |
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406 Err(LockError::AlreadyHeld) => { |
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407 // Not updating the dirstate is not ideal but not critical: |
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408 // don’t keep our caller waiting until some other Mercurial |
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409 // process releases the lock. |
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410 } |
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411 Err(LockError::Other(HgError::IoError { error, .. })) |
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412 if error.kind() == io::ErrorKind::PermissionDenied => |
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413 { |
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414 // `hg status` on a read-only repository is fine |
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415 } |
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416 Err(LockError::Other(error)) => { |
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417 // Report other I/O errors |
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418 Err(error)? |
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419 } |
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420 } |
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421 Ok(()) |
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422 } |
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423 |
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424 fn ignore_files(repo: &Repo, config: &Config) -> Vec<PathBuf> { |
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425 let mut ignore_files = Vec::new(); |
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426 let repo_ignore = repo.working_directory_vfs().join(".hgignore"); |
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427 if repo_ignore.exists() { |
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428 ignore_files.push(repo_ignore) |
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429 } |
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430 for (key, value) in config.iter_section(b"ui") { |
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431 if key == b"ignore" || key.starts_with(b"ignore.") { |
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432 let path = get_path_from_bytes(value); |
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433 // TODO:Â expand "~/" and environment variable here, like Python |
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434 // does with `os.path.expanduser` and `os.path.expandvars` |
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435 |
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436 let joined = repo.working_directory_path().join(path); |
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437 ignore_files.push(joined); |
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438 } |
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439 } |
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440 ignore_files |
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441 } |
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442 |
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443 struct DisplayStatusPaths<'a> { |
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444 ui: &'a Ui, |
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445 no_status: bool, |
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446 relativize: Option<RelativizePaths>, |
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447 } |
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448 |
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449 impl DisplayStatusPaths<'_> { |
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450 // Probably more elegant to use a Deref or Borrow trait rather than |
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451 // harcode HgPathBuf, but probably not really useful at this point |
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452 fn display( |
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453 &self, |
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454 status_prefix: &[u8], |
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455 label: &'static str, |
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456 mut paths: Vec<StatusPath<'_>>, |
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457 ) -> Result<(), CommandError> { |
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458 paths.sort_unstable(); |
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459 // TODO: get the stdout lock once for the whole loop |
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460 // instead of in each write |
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461 for StatusPath { path, copy_source } in paths { |
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462 let relative; |
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463 let path = if let Some(relativize) = &self.relativize { |
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464 relative = relativize.relativize(&path); |
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465 &*relative |
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466 } else { |
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467 path.as_bytes() |
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468 }; |
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469 // TODO: Add a way to use `write_bytes!` instead of `format_bytes!` |
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470 // in order to stream to stdout instead of allocating an |
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471 // itermediate `Vec<u8>`. |
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472 if !self.no_status { |
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473 self.ui.write_stdout_labelled(status_prefix, label)? |
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474 } |
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475 self.ui |
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476 .write_stdout_labelled(&format_bytes!(b"{}\n", path), label)?; |
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477 if let Some(source) = copy_source { |
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478 let label = "status.copied"; |
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479 self.ui.write_stdout_labelled( |
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480 &format_bytes!(b" {}\n", source.as_bytes()), |
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481 label, |
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482 )? |
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483 } |
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484 } |
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485 Ok(()) |
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486 } |
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487 } |
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488 |
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489 /// Check if a file is modified by comparing actual repo store and file system. |
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490 /// |
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491 /// This meant to be used for those that the dirstate cannot resolve, due |
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492 /// to time resolution limits. |
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493 fn unsure_is_modified( |
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494 repo: &Repo, |
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495 manifest: &Manifest, |
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496 hg_path: &HgPath, |
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497 ) -> Result<bool, HgError> { |
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498 let vfs = repo.working_directory_vfs(); |
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499 let fs_path = hg_path_to_path_buf(hg_path).expect("HgPath conversion"); |
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500 let fs_metadata = vfs.symlink_metadata(&fs_path)?; |
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501 let is_symlink = fs_metadata.file_type().is_symlink(); |
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502 // TODO: Also account for `FALLBACK_SYMLINK` and `FALLBACK_EXEC` from the |
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503 // dirstate |
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504 let fs_flags = if is_symlink { |
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505 Some(b'l') |
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506 } else if has_exec_bit(&fs_metadata) { |
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507 Some(b'x') |
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508 } else { |
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509 None |
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510 }; |
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511 |
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512 let entry = manifest |
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513 .find_by_path(hg_path)? |
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514 .expect("ambgious file not in p1"); |
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515 if entry.flags != fs_flags { |
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516 return Ok(true); |
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517 } |
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518 let filelog = repo.filelog(hg_path)?; |
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519 let fs_len = fs_metadata.len(); |
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520 let file_node = entry.node_id()?; |
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521 let filelog_entry = filelog.entry_for_node(file_node).map_err(|_| { |
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522 HgError::corrupted(format!( |
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523 "filelog missing node {:?} from manifest", |
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524 file_node |
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525 )) |
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526 })?; |
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527 if filelog_entry.file_data_len_not_equal_to(fs_len) { |
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528 // No need to read file contents: |
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529 // it cannot be equal if it has a different length. |
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530 return Ok(true); |
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531 } |
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532 |
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533 let p1_filelog_data = filelog_entry.data()?; |
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534 let p1_contents = p1_filelog_data.file_data()?; |
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535 if p1_contents.len() as u64 != fs_len { |
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536 // No need to read file contents: |
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537 // it cannot be equal if it has a different length. |
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538 return Ok(true); |
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539 } |
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540 |
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541 let fs_contents = if is_symlink { |
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542 get_bytes_from_os_string(vfs.read_link(fs_path)?.into_os_string()) |
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543 } else { |
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544 vfs.read(fs_path)? |
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545 }; |
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546 Ok(p1_contents != &*fs_contents) |
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547 } |