Mercurial > hg
annotate rust/rhg/src/commands/status.rs @ 48454:473af5cbc209
rhg: Add support for `rhg status --copies`
Copy sources are collected during `status()` rather than after the fact like
in Python, because `status()` takes a `&mut` exclusive reference to the dirstate map
(in order to potentially mutate it for directory mtimes) and returns `Cow<'_, HgPath>`
that borrow the dirstate map.
Even though with `Cow` only some shared borrows remain, the still extend the same
lifetime of the initial `&mut` so the dirstate map cannot be borrowed again
to access copy sources after the fact:
https://doc.rust-lang.org/nomicon/lifetime-mismatch.html#limits-of-lifetimes
Additionally, collecting copy sources during the dirstate tree traversal that
`status()` already does avoids the cost of another traversal or other lookups
(though I haven’t benchmarked that cost).
Differential Revision: https://phab.mercurial-scm.org/D11899
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Fri, 10 Dec 2021 16:18:58 +0100 |
parents | 9b0e1f64656f |
children | 0c408831b2f1 |
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::dirstate::RANGE_MASK_31BIT; |
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19 use hg::errors::{HgError, IoResultExt}; |
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20 use hg::lock::LockError; |
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21 use hg::manifest::Manifest; |
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22 use hg::matchers::AlwaysMatcher; |
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23 use hg::repo::Repo; |
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24 use hg::utils::files::get_bytes_from_os_string; |
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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::StatusOptions; |
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28 use log::{info, warn}; |
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29 use std::io; |
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30 use std::path::PathBuf; |
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31 |
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32 pub const HELP_TEXT: &str = " |
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33 Show changed files in the working directory |
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34 |
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35 This is a pure Rust version of `hg status`. |
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36 |
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37 Some options might be missing, check the list below. |
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38 "; |
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39 |
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40 pub fn args() -> clap::App<'static, 'static> { |
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41 SubCommand::with_name("status") |
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42 .alias("st") |
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43 .about(HELP_TEXT) |
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44 .arg( |
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45 Arg::with_name("all") |
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46 .help("show status of all files") |
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47 .short("-A") |
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48 .long("--all"), |
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49 ) |
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50 .arg( |
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51 Arg::with_name("modified") |
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52 .help("show only modified files") |
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53 .short("-m") |
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54 .long("--modified"), |
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55 ) |
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56 .arg( |
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57 Arg::with_name("added") |
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58 .help("show only added files") |
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59 .short("-a") |
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60 .long("--added"), |
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61 ) |
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62 .arg( |
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63 Arg::with_name("removed") |
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64 .help("show only removed files") |
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65 .short("-r") |
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66 .long("--removed"), |
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67 ) |
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68 .arg( |
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69 Arg::with_name("clean") |
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70 .help("show only clean files") |
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71 .short("-c") |
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72 .long("--clean"), |
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73 ) |
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74 .arg( |
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75 Arg::with_name("deleted") |
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76 .help("show only deleted files") |
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77 .short("-d") |
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78 .long("--deleted"), |
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79 ) |
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80 .arg( |
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81 Arg::with_name("unknown") |
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82 .help("show only unknown (not tracked) files") |
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83 .short("-u") |
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84 .long("--unknown"), |
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85 ) |
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86 .arg( |
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87 Arg::with_name("ignored") |
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88 .help("show only ignored files") |
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89 .short("-i") |
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90 .long("--ignored"), |
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91 ) |
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92 .arg( |
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93 Arg::with_name("copies") |
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94 .help("show source of copied files (DEFAULT: ui.statuscopies)") |
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95 .short("-C") |
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96 .long("--copies"), |
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97 ) |
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98 .arg( |
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99 Arg::with_name("no-status") |
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100 .help("hide status prefix") |
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101 .short("-n") |
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102 .long("--no-status"), |
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103 ) |
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104 } |
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105 |
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106 /// Pure data type allowing the caller to specify file states to display |
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107 #[derive(Copy, Clone, Debug)] |
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108 pub struct DisplayStates { |
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109 pub modified: bool, |
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110 pub added: bool, |
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111 pub removed: bool, |
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112 pub clean: bool, |
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113 pub deleted: bool, |
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114 pub unknown: bool, |
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115 pub ignored: bool, |
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116 } |
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117 |
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118 pub const DEFAULT_DISPLAY_STATES: DisplayStates = DisplayStates { |
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119 modified: true, |
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120 added: true, |
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121 removed: true, |
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122 clean: false, |
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123 deleted: true, |
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124 unknown: true, |
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125 ignored: false, |
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126 }; |
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127 |
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128 pub const ALL_DISPLAY_STATES: DisplayStates = DisplayStates { |
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129 modified: true, |
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130 added: true, |
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131 removed: true, |
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132 clean: true, |
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133 deleted: true, |
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134 unknown: true, |
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135 ignored: true, |
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136 }; |
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137 |
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138 impl DisplayStates { |
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139 pub fn is_empty(&self) -> bool { |
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140 !(self.modified |
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141 || self.added |
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142 || self.removed |
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143 || self.clean |
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144 || self.deleted |
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145 || self.unknown |
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146 || self.ignored) |
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147 } |
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148 } |
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149 |
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150 pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> { |
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151 let status_enabled_default = false; |
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152 let status_enabled = invocation.config.get_option(b"rhg", b"status")?; |
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153 if !status_enabled.unwrap_or(status_enabled_default) { |
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154 return Err(CommandError::unsupported( |
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155 "status is experimental in rhg (enable it with 'rhg.status = true' \ |
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156 or enable fallback with 'rhg.on-unsupported = fallback')" |
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157 )); |
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158 } |
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159 |
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160 // TODO: lift these limitations |
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161 if invocation.config.get_bool(b"ui", b"tweakdefaults")? { |
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162 return Err(CommandError::unsupported( |
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163 "ui.tweakdefaults is not yet supported with rhg status", |
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164 )); |
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165 } |
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166 if invocation.config.get_bool(b"ui", b"statuscopies")? { |
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167 return Err(CommandError::unsupported( |
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168 "ui.statuscopies is not yet supported with rhg status", |
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169 )); |
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170 } |
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171 if invocation |
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172 .config |
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173 .get(b"commands", b"status.terse") |
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174 .is_some() |
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175 { |
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176 return Err(CommandError::unsupported( |
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177 "status.terse is not yet supported with rhg status", |
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178 )); |
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179 } |
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180 |
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181 let ui = invocation.ui; |
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182 let config = invocation.config; |
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183 let args = invocation.subcommand_args; |
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184 let all = args.is_present("all"); |
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185 let display_states = if all { |
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186 // TODO when implementing `--quiet`: it excludes clean files |
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187 // from `--all` |
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188 ALL_DISPLAY_STATES |
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189 } else { |
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190 let requested = DisplayStates { |
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191 modified: args.is_present("modified"), |
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192 added: args.is_present("added"), |
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193 removed: args.is_present("removed"), |
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194 clean: args.is_present("clean"), |
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195 deleted: args.is_present("deleted"), |
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196 unknown: args.is_present("unknown"), |
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197 ignored: args.is_present("ignored"), |
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198 }; |
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199 if requested.is_empty() { |
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200 DEFAULT_DISPLAY_STATES |
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201 } else { |
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202 requested |
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203 } |
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204 }; |
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205 let no_status = args.is_present("no-status"); |
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206 let list_copies = all |
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207 || args.is_present("copies") |
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208 || config.get_bool(b"ui", b"statuscopies")?; |
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209 |
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210 let repo = invocation.repo?; |
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211 |
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212 if repo.has_sparse() || repo.has_narrow() { |
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213 return Err(CommandError::unsupported( |
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214 "rhg status is not supported for sparse checkouts or narrow clones yet" |
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215 )); |
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216 } |
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217 |
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218 let mut dmap = repo.dirstate_map_mut()?; |
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219 |
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220 let options = StatusOptions { |
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221 // we're currently supporting file systems with exec flags only |
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222 // anyway |
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223 check_exec: true, |
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224 list_clean: display_states.clean, |
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225 list_unknown: display_states.unknown, |
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226 list_ignored: display_states.ignored, |
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227 list_copies, |
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228 collect_traversed_dirs: false, |
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229 }; |
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230 let (mut ds_status, pattern_warnings) = dmap.status( |
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231 &AlwaysMatcher, |
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232 repo.working_directory_path().to_owned(), |
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233 ignore_files(repo, config), |
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234 options, |
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235 )?; |
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236 if !pattern_warnings.is_empty() { |
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237 warn!("Pattern warnings: {:?}", &pattern_warnings); |
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238 } |
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239 |
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240 if !ds_status.bad.is_empty() { |
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241 warn!("Bad matches {:?}", &(ds_status.bad)) |
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242 } |
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243 if !ds_status.unsure.is_empty() { |
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244 info!( |
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245 "Files to be rechecked by retrieval from filelog: {:?}", |
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246 ds_status.unsure.iter().map(|s| &s.path).collect::<Vec<_>>() |
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247 ); |
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248 } |
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249 let mut fixup = Vec::new(); |
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250 if !ds_status.unsure.is_empty() |
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251 && (display_states.modified || display_states.clean) |
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252 { |
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253 let p1 = repo.dirstate_parents()?.p1; |
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254 let manifest = repo.manifest_for_node(p1).map_err(|e| { |
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255 CommandError::from((e, &*format!("{:x}", p1.short()))) |
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256 })?; |
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257 for to_check in ds_status.unsure { |
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258 if unsure_is_modified(repo, &manifest, &to_check.path)? { |
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259 if display_states.modified { |
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260 ds_status.modified.push(to_check); |
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261 } |
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262 } else { |
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263 if display_states.clean { |
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264 ds_status.clean.push(to_check.clone()); |
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265 } |
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266 fixup.push(to_check.path.into_owned()) |
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267 } |
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268 } |
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269 } |
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270 let relative_paths = (!ui.plain()) |
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271 && config |
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272 .get_option(b"commands", b"status.relative")? |
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273 .unwrap_or(config.get_bool(b"ui", b"relative-paths")?); |
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274 let output = DisplayStatusPaths { |
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275 ui, |
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276 no_status, |
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277 relativize: if relative_paths { |
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278 Some(RelativizePaths::new(repo)?) |
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279 } else { |
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280 None |
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281 }, |
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282 }; |
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283 if display_states.modified { |
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284 output.display(b"M", ds_status.modified)?; |
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285 } |
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286 if display_states.added { |
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287 output.display(b"A", ds_status.added)?; |
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288 } |
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289 if display_states.removed { |
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290 output.display(b"R", ds_status.removed)?; |
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291 } |
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292 if display_states.deleted { |
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293 output.display(b"!", ds_status.deleted)?; |
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294 } |
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295 if display_states.unknown { |
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296 output.display(b"?", ds_status.unknown)?; |
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297 } |
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298 if display_states.ignored { |
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299 output.display(b"I", ds_status.ignored)?; |
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300 } |
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301 if display_states.clean { |
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302 output.display(b"C", ds_status.clean)?; |
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303 } |
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304 |
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305 let mut dirstate_write_needed = ds_status.dirty; |
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306 let filesystem_time_at_status_start = ds_status |
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307 .filesystem_time_at_status_start |
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308 .map(TruncatedTimestamp::from); |
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309 |
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310 if (fixup.is_empty() || filesystem_time_at_status_start.is_none()) |
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311 && !dirstate_write_needed |
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312 { |
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313 // Nothing to update |
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314 return Ok(()); |
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315 } |
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316 |
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317 // Update the dirstate on disk if we can |
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318 let with_lock_result = |
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319 repo.try_with_wlock_no_wait(|| -> Result<(), CommandError> { |
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320 if let Some(mtime_boundary) = filesystem_time_at_status_start { |
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321 for hg_path in fixup { |
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322 use std::os::unix::fs::MetadataExt; |
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323 let fs_path = hg_path_to_path_buf(&hg_path) |
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324 .expect("HgPath conversion"); |
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325 // Specifically do not reuse `fs_metadata` from |
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326 // `unsure_is_clean` which was needed before reading |
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327 // contents. Here we access metadata again after reading |
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328 // content, in case it changed in the meantime. |
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329 let fs_metadata = repo |
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330 .working_directory_vfs() |
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331 .symlink_metadata(&fs_path)?; |
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332 if let Some(mtime) = |
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333 TruncatedTimestamp::for_reliable_mtime_of( |
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334 &fs_metadata, |
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335 &mtime_boundary, |
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336 ) |
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337 .when_reading_file(&fs_path)? |
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338 { |
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339 let mode = fs_metadata.mode(); |
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340 let size = fs_metadata.len() as u32 & RANGE_MASK_31BIT; |
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341 let mut entry = dmap |
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342 .get(&hg_path)? |
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343 .expect("ambiguous file not in dirstate"); |
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344 entry.set_clean(mode, size, mtime); |
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345 dmap.add_file(&hg_path, entry)?; |
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346 dirstate_write_needed = true |
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347 } |
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348 } |
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349 } |
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350 drop(dmap); // Avoid "already mutably borrowed" RefCell panics |
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351 if dirstate_write_needed { |
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352 repo.write_dirstate()? |
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353 } |
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354 Ok(()) |
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355 }); |
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356 match with_lock_result { |
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357 Ok(closure_result) => closure_result?, |
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358 Err(LockError::AlreadyHeld) => { |
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359 // Not updating the dirstate is not ideal but not critical: |
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360 // don’t keep our caller waiting until some other Mercurial |
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361 // process releases the lock. |
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362 } |
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363 Err(LockError::Other(HgError::IoError { error, .. })) |
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364 if error.kind() == io::ErrorKind::PermissionDenied => |
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365 { |
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366 // `hg status` on a read-only repository is fine |
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367 } |
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368 Err(LockError::Other(error)) => { |
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369 // Report other I/O errors |
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370 Err(error)? |
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371 } |
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372 } |
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373 Ok(()) |
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374 } |
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375 |
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376 fn ignore_files(repo: &Repo, config: &Config) -> Vec<PathBuf> { |
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377 let mut ignore_files = Vec::new(); |
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378 let repo_ignore = repo.working_directory_vfs().join(".hgignore"); |
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379 if repo_ignore.exists() { |
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380 ignore_files.push(repo_ignore) |
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381 } |
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382 for (key, value) in config.iter_section(b"ui") { |
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383 if key == b"ignore" || key.starts_with(b"ignore.") { |
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384 let path = get_path_from_bytes(value); |
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385 // TODO:Â expand "~/" and environment variable here, like Python |
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386 // does with `os.path.expanduser` and `os.path.expandvars` |
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387 |
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388 let joined = repo.working_directory_path().join(path); |
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389 ignore_files.push(joined); |
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390 } |
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391 } |
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392 ignore_files |
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393 } |
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394 |
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395 struct DisplayStatusPaths<'a> { |
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396 ui: &'a Ui, |
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397 no_status: bool, |
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398 relativize: Option<RelativizePaths>, |
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399 } |
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400 |
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401 impl DisplayStatusPaths<'_> { |
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402 // Probably more elegant to use a Deref or Borrow trait rather than |
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403 // harcode HgPathBuf, but probably not really useful at this point |
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404 fn display( |
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405 &self, |
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406 status_prefix: &[u8], |
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407 mut paths: Vec<StatusPath<'_>>, |
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408 ) -> Result<(), CommandError> { |
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409 paths.sort_unstable(); |
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410 for StatusPath { path, copy_source } in paths { |
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411 let relative; |
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412 let path = if let Some(relativize) = &self.relativize { |
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413 relative = relativize.relativize(&path); |
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414 &*relative |
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415 } else { |
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416 path.as_bytes() |
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417 }; |
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418 // TODO optim, probably lots of unneeded copies here, especially |
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419 // if out stream is buffered |
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420 if self.no_status { |
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421 self.ui.write_stdout(&format_bytes!(b"{}\n", path))? |
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422 } else { |
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423 self.ui.write_stdout(&format_bytes!( |
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424 b"{} {}\n", |
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425 status_prefix, |
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426 path |
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427 ))? |
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428 } |
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429 if let Some(source) = copy_source { |
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430 self.ui.write_stdout(&format_bytes!( |
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431 b" {}\n", |
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432 source.as_bytes() |
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433 ))? |
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434 } |
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435 } |
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436 Ok(()) |
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437 } |
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438 } |
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439 |
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440 /// Check if a file is modified by comparing actual repo store and file system. |
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441 /// |
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442 /// This meant to be used for those that the dirstate cannot resolve, due |
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443 /// to time resolution limits. |
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444 fn unsure_is_modified( |
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445 repo: &Repo, |
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446 manifest: &Manifest, |
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447 hg_path: &HgPath, |
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448 ) -> Result<bool, HgError> { |
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449 let vfs = repo.working_directory_vfs(); |
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450 let fs_path = hg_path_to_path_buf(hg_path).expect("HgPath conversion"); |
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451 let fs_metadata = vfs.symlink_metadata(&fs_path)?; |
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452 let is_symlink = fs_metadata.file_type().is_symlink(); |
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453 // TODO: Also account for `FALLBACK_SYMLINK` and `FALLBACK_EXEC` from the |
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454 // dirstate |
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455 let fs_flags = if is_symlink { |
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456 Some(b'l') |
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457 } else if has_exec_bit(&fs_metadata) { |
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458 Some(b'x') |
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459 } else { |
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460 None |
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461 }; |
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462 |
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463 let entry = manifest |
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464 .find_file(hg_path)? |
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465 .expect("ambgious file not in p1"); |
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466 if entry.flags != fs_flags { |
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467 return Ok(true); |
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468 } |
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469 let filelog = repo.filelog(hg_path)?; |
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470 let filelog_entry = |
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471 filelog.data_for_node(entry.node_id()?).map_err(|_| { |
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472 HgError::corrupted("filelog missing node from manifest") |
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473 })?; |
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474 let contents_in_p1 = filelog_entry.data()?; |
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475 |
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476 let fs_contents = if is_symlink { |
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477 get_bytes_from_os_string(vfs.read_link(fs_path)?.into_os_string()) |
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478 } else { |
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479 vfs.read(fs_path)? |
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480 }; |
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481 Ok(contents_in_p1 != &*fs_contents) |
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482 } |