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annotate rust/rhg/src/commands/status.rs @ 47964:796206e74b10

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rhg: Reuse manifest when checking status of multiple ambiguous files When `rhg status` cannot determine whether a file is clean based on mtime and size alone, it needs to compare its contents with those found in the parent commit. Previously, rhg would find the (same) manifest of that commit again for every such file. This is lifted out of the loop and reused. Differential Revision: https://phab.mercurial-scm.org/D11411
author Simon Sapin <simon.sapin@octobus.net>
date Mon, 13 Sep 2021 18:09:10 +0200
parents 81aedf1fc897
children f9e6f2bb721d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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::dispatch::DirstateMapMethods;
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13 use hg::errors::{HgError, IoResultExt};
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14 use hg::manifest::Manifest;
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15 use hg::matchers::AlwaysMatcher;
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16 use hg::repo::Repo;
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17 use hg::utils::hg_path::{hg_path_to_os_string, HgPath};
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18 use hg::{HgPathCow, StatusOptions};
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19 use log::{info, warn};
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20 use std::convert::TryInto;
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21 use std::fs;
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22 use std::io::BufReader;
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23 use std::io::Read;
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24
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25 pub const HELP_TEXT: &str = "
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26 Show changed files in the working directory
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27
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28 This is a pure Rust version of `hg status`.
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29
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30 Some options might be missing, check the list below.
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31 ";
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32
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33 pub fn args() -> clap::App<'static, 'static> {
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34 SubCommand::with_name("status")
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35 .alias("st")
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36 .about(HELP_TEXT)
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37 .arg(
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38 Arg::with_name("all")
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39 .help("show status of all files")
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40 .short("-A")
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41 .long("--all"),
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42 )
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43 .arg(
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44 Arg::with_name("modified")
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45 .help("show only modified files")
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46 .short("-m")
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47 .long("--modified"),
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48 )
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49 .arg(
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50 Arg::with_name("added")
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51 .help("show only added files")
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52 .short("-a")
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53 .long("--added"),
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54 )
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55 .arg(
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56 Arg::with_name("removed")
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57 .help("show only removed files")
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58 .short("-r")
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59 .long("--removed"),
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60 )
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61 .arg(
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62 Arg::with_name("clean")
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63 .help("show only clean files")
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64 .short("-c")
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65 .long("--clean"),
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66 )
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67 .arg(
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68 Arg::with_name("deleted")
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69 .help("show only deleted files")
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70 .short("-d")
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71 .long("--deleted"),
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72 )
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73 .arg(
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74 Arg::with_name("unknown")
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75 .help("show only unknown (not tracked) files")
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76 .short("-u")
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77 .long("--unknown"),
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78 )
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79 .arg(
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80 Arg::with_name("ignored")
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81 .help("show only ignored files")
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82 .short("-i")
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83 .long("--ignored"),
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84 )
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85 }
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86
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87 /// Pure data type allowing the caller to specify file states to display
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88 #[derive(Copy, Clone, Debug)]
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89 pub struct DisplayStates {
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90 pub modified: bool,
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91 pub added: bool,
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92 pub removed: bool,
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93 pub clean: bool,
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94 pub deleted: bool,
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95 pub unknown: bool,
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96 pub ignored: bool,
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97 }
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98
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99 pub const DEFAULT_DISPLAY_STATES: DisplayStates = DisplayStates {
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100 modified: true,
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101 added: true,
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102 removed: true,
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103 clean: false,
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104 deleted: true,
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105 unknown: true,
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106 ignored: false,
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107 };
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108
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109 pub const ALL_DISPLAY_STATES: DisplayStates = DisplayStates {
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110 modified: true,
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111 added: true,
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112 removed: true,
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113 clean: true,
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114 deleted: true,
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115 unknown: true,
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116 ignored: true,
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117 };
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118
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119 impl DisplayStates {
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120 pub fn is_empty(&self) -> bool {
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121 !(self.modified
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122 || self.added
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123 || self.removed
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124 || self.clean
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125 || self.deleted
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126 || self.unknown
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127 || self.ignored)
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128 }
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129 }
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130
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131 pub fn run(invocation: &crate::CliInvocation) -> Result<(), CommandError> {
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132 let status_enabled_default = false;
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133 let status_enabled = invocation.config.get_option(b"rhg", b"status")?;
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134 if !status_enabled.unwrap_or(status_enabled_default) {
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135 return Err(CommandError::unsupported(
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136 "status is experimental in rhg (enable it with 'rhg.status = true' \
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137 or enable fallback with 'rhg.on-unsupported = fallback')"
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138 ));
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139 }
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140
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141 let ui = invocation.ui;
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142 let args = invocation.subcommand_args;
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143 let display_states = if args.is_present("all") {
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144 // TODO when implementing `--quiet`: it excludes clean files
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145 // from `--all`
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146 ALL_DISPLAY_STATES
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147 } else {
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148 let requested = DisplayStates {
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149 modified: args.is_present("modified"),
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150 added: args.is_present("added"),
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151 removed: args.is_present("removed"),
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152 clean: args.is_present("clean"),
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153 deleted: args.is_present("deleted"),
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154 unknown: args.is_present("unknown"),
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155 ignored: args.is_present("ignored"),
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156 };
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157 if requested.is_empty() {
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158 DEFAULT_DISPLAY_STATES
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159 } else {
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160 requested
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161 }
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162 };
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163
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164 let repo = invocation.repo?;
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165 let mut dmap = repo.dirstate_map_mut()?;
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166
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167 let options = StatusOptions {
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168 // TODO should be provided by the dirstate parsing and
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169 // hence be stored on dmap. Using a value that assumes we aren't
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170 // below the time resolution granularity of the FS and the
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171 // dirstate.
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172 last_normal_time: 0,
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173 // we're currently supporting file systems with exec flags only
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174 // anyway
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175 check_exec: true,
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176 list_clean: display_states.clean,
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177 list_unknown: display_states.unknown,
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178 list_ignored: display_states.ignored,
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179 collect_traversed_dirs: false,
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180 };
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181 let ignore_file = repo.working_directory_vfs().join(".hgignore"); // TODO hardcoded
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182 let (mut ds_status, pattern_warnings) = dmap.status(
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183 &AlwaysMatcher,
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184 repo.working_directory_path().to_owned(),
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185 vec![ignore_file],
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186 options,
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187 )?;
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188 if !pattern_warnings.is_empty() {
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189 warn!("Pattern warnings: {:?}", &pattern_warnings);
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190 }
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191
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192 if !ds_status.bad.is_empty() {
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193 warn!("Bad matches {:?}", &(ds_status.bad))
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194 }
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195 if !ds_status.unsure.is_empty() {
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196 info!(
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197 "Files to be rechecked by retrieval from filelog: {:?}",
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198 &ds_status.unsure
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199 );
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200 }
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201 if !ds_status.unsure.is_empty()
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diff changeset
202 && (display_states.modified || display_states.clean)
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diff changeset
203 {
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diff changeset
204 let p1 = repo.dirstate_parents()?.p1;
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diff changeset
205 let manifest = repo.manifest_for_node(p1).map_err(|e| {
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diff changeset
206 CommandError::from((e, &*format!("{:x}", p1.short())))
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diff changeset
207 })?;
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diff changeset
208 for to_check in ds_status.unsure {
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diff changeset
209 if cat_file_is_modified(repo, &manifest, &to_check)? {
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diff changeset
210 if display_states.modified {
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diff changeset
211 ds_status.modified.push(to_check);
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diff changeset
212 }
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213 } else {
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diff changeset
214 if display_states.clean {
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diff changeset
215 ds_status.clean.push(to_check);
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216 }
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217 }
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218 }
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219 }
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diff changeset
220 if display_states.modified {
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diff changeset
221 display_status_paths(ui, &mut ds_status.modified, b"M")?;
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222 }
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diff changeset
223 if display_states.added {
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diff changeset
224 display_status_paths(ui, &mut ds_status.added, b"A")?;
46822
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225 }
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diff changeset
226 if display_states.removed {
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227 display_status_paths(ui, &mut ds_status.removed, b"R")?;
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228 }
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diff changeset
229 if display_states.deleted {
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diff changeset
230 display_status_paths(ui, &mut ds_status.deleted, b"!")?;
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231 }
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diff changeset
232 if display_states.unknown {
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diff changeset
233 display_status_paths(ui, &mut ds_status.unknown, b"?")?;
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234 }
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parents:
diff changeset
235 if display_states.ignored {
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diff changeset
236 display_status_paths(ui, &mut ds_status.ignored, b"I")?;
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diff changeset
237 }
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diff changeset
238 if display_states.clean {
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diff changeset
239 display_status_paths(ui, &mut ds_status.clean, b"C")?;
46822
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240 }
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parents:
diff changeset
241 Ok(())
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parents:
diff changeset
242 }
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parents:
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243
c71e8d9e7f2a rhg: Initial support for the 'status' command
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parents:
diff changeset
244 // Probably more elegant to use a Deref or Borrow trait rather than
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parents:
diff changeset
245 // harcode HgPathBuf, but probably not really useful at this point
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parents:
diff changeset
246 fn display_status_paths(
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diff changeset
247 ui: &Ui,
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diff changeset
248 paths: &mut [HgPathCow],
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parents:
diff changeset
249 status_prefix: &[u8],
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parents:
diff changeset
250 ) -> Result<(), CommandError> {
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diff changeset
251 paths.sort_unstable();
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252 for path in paths {
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253 // Same TODO as in commands::root
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254 let bytes: &[u8] = path.as_bytes();
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255 // TODO optim, probably lots of unneeded copies here, especially
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256 // if out stream is buffered
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257 ui.write_stdout(&[status_prefix, b" ", bytes, b"\n"].concat())?;
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258 }
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259 Ok(())
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260 }
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261
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262 /// Check if a file is modified by comparing actual repo store and file system.
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263 ///
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264 /// This meant to be used for those that the dirstate cannot resolve, due
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265 /// to time resolution limits.
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266 ///
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267 /// TODO: detect permission bits and similar metadata modifications
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268 fn cat_file_is_modified(
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269 repo: &Repo,
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270 manifest: &Manifest,
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271 hg_path: &HgPath,
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272 ) -> Result<bool, HgError> {
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273 let file_node = manifest
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274 .find_file(hg_path)?
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275 .expect("ambgious file not in p1");
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276 let filelog = repo.filelog(hg_path)?;
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277 let filelog_entry = filelog.get_node(file_node).map_err(|_| {
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278 HgError::corrupted("filelog missing node from manifest")
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279 })?;
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280 let contents_in_p1 = filelog_entry.data()?;
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281
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282 let fs_path = repo
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283 .working_directory_vfs()
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284 .join(hg_path_to_os_string(hg_path).expect("HgPath conversion"));
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285 let hg_data_len: u64 = match contents_in_p1.len().try_into() {
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286 Ok(v) => v,
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287 Err(_) => {
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288 // conversion of data length to u64 failed,
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289 // good luck for any file to have this content
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290 return Ok(true);
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291 }
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292 };
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293 let fobj = fs::File::open(&fs_path).when_reading_file(&fs_path)?;
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294 if fobj.metadata().when_reading_file(&fs_path)?.len() != hg_data_len {
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295 return Ok(true);
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296 }
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297 for (fs_byte, &hg_byte) in BufReader::new(fobj).bytes().zip(contents_in_p1)
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298 {
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299 if fs_byte.when_reading_file(&fs_path)? != hg_byte {
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300 return Ok(true);
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301 }
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302 }
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303 Ok(false)
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304 }