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annotate rust/rhg/src/main.rs @ 45924:a2eda1ff22aa

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requirements: move loading to hg-core and add parsing No functional change, checking comes later. Differential Revision: https://phab.mercurial-scm.org/D9398
author Simon Sapin <simon-commits@exyr.org>
date Tue, 24 Nov 2020 17:49:16 +0100
parents ead435aa5294
children ca3f73cc3cf4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 extern crate log;
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2 use clap::App;
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3 use clap::AppSettings;
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4 use clap::Arg;
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5 use clap::ArgGroup;
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6 use clap::ArgMatches;
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7 use clap::SubCommand;
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8 use hg::operations::DebugDataKind;
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9 use std::convert::TryFrom;
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10
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11 mod commands;
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12 mod error;
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13 mod exitcode;
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14 mod ui;
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15 use commands::Command;
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16 use error::CommandError;
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17
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18 fn main() {
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19 env_logger::init();
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20 let app = App::new("rhg")
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21 .setting(AppSettings::AllowInvalidUtf8)
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22 .setting(AppSettings::SubcommandRequired)
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23 .setting(AppSettings::VersionlessSubcommands)
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24 .version("0.0.1")
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25 .subcommand(
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26 SubCommand::with_name("root").about(commands::root::HELP_TEXT),
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27 )
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28 .subcommand(
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29 SubCommand::with_name("files")
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30 .arg(
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31 Arg::with_name("rev")
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32 .help("search the repository as it is in REV")
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33 .short("-r")
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34 .long("--revision")
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35 .value_name("REV")
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36 .takes_value(true),
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37 )
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38 .about(commands::files::HELP_TEXT),
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39 )
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40 .subcommand(
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41 SubCommand::with_name("cat")
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42 .arg(
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43 Arg::with_name("rev")
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44 .help("search the repository as it is in REV")
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45 .short("-r")
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46 .long("--revision")
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47 .value_name("REV")
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48 .takes_value(true),
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49 )
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50 .arg(
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51 clap::Arg::with_name("files")
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52 .required(true)
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53 .multiple(true)
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54 .empty_values(false)
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55 .value_name("FILE")
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56 .help("Activity to start: activity@category"),
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57 )
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58 .about(commands::cat::HELP_TEXT),
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59 )
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60 .subcommand(
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61 SubCommand::with_name("debugdata")
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62 .about(commands::debugdata::HELP_TEXT)
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63 .arg(
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64 Arg::with_name("changelog")
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65 .help("open changelog")
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66 .short("-c")
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67 .long("--changelog"),
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68 )
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69 .arg(
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70 Arg::with_name("manifest")
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71 .help("open manifest")
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72 .short("-m")
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73 .long("--manifest"),
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74 )
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75 .group(
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76 ArgGroup::with_name("")
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77 .args(&["changelog", "manifest"])
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78 .required(true),
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79 )
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80 .arg(
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81 Arg::with_name("rev")
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82 .help("revision")
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83 .required(true)
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84 .value_name("REV"),
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85 ),
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86 )
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87 .subcommand(
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88 SubCommand::with_name("debugrequirements")
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89 .about(commands::debugrequirements::HELP_TEXT),
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90 );
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91
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92 let matches = app.clone().get_matches_safe().unwrap_or_else(|err| {
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93 let _ = ui::Ui::new().writeln_stderr_str(&err.message);
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94 std::process::exit(exitcode::UNIMPLEMENTED_COMMAND)
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95 });
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96
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97 let ui = ui::Ui::new();
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98
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99 let command_result = match_subcommand(matches, &ui);
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100
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101 match command_result {
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102 Ok(_) => std::process::exit(exitcode::OK),
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103 Err(e) => {
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104 let message = e.get_error_message_bytes();
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105 if let Some(msg) = message {
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106 match ui.write_stderr(&msg) {
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107 Ok(_) => (),
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108 Err(_) => std::process::exit(exitcode::ABORT),
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109 };
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110 };
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111 e.exit()
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112 }
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113 }
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114 }
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115
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116 fn match_subcommand(
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117 matches: ArgMatches,
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118 ui: &ui::Ui,
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119 ) -> Result<(), CommandError> {
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120 match matches.subcommand() {
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121 ("root", _) => commands::root::RootCommand::new().run(&ui),
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122 ("files", Some(matches)) => {
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123 commands::files::FilesCommand::try_from(matches)?.run(&ui)
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124 }
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125 ("cat", Some(matches)) => {
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126 commands::cat::CatCommand::try_from(matches)?.run(&ui)
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127 }
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128 ("debugdata", Some(matches)) => {
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129 commands::debugdata::DebugDataCommand::try_from(matches)?.run(&ui)
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130 }
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131 ("debugrequirements", _) => {
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132 commands::debugrequirements::DebugRequirementsCommand::new()
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133 .run(&ui)
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134 }
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135 _ => unreachable!(), // Because of AppSettings::SubcommandRequired,
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136 }
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137 }
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138
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139 impl<'a> TryFrom<&'a ArgMatches<'_>> for commands::files::FilesCommand<'a> {
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140 type Error = CommandError;
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141
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142 fn try_from(args: &'a ArgMatches) -> Result<Self, Self::Error> {
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143 let rev = args.value_of("rev");
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144 Ok(commands::files::FilesCommand::new(rev))
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145 }
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146 }
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147
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148 impl<'a> TryFrom<&'a ArgMatches<'_>> for commands::cat::CatCommand<'a> {
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149 type Error = CommandError;
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150
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151 fn try_from(args: &'a ArgMatches) -> Result<Self, Self::Error> {
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152 let rev = args.value_of("rev");
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153 let files = match args.values_of("files") {
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154 Some(files) => files.collect(),
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155 None => vec![],
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156 };
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157 Ok(commands::cat::CatCommand::new(rev, files))
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158 }
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159 }
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160
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161 impl<'a> TryFrom<&'a ArgMatches<'_>>
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162 for commands::debugdata::DebugDataCommand<'a>
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163 {
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164 type Error = CommandError;
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165
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166 fn try_from(args: &'a ArgMatches) -> Result<Self, Self::Error> {
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167 let rev = args
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168 .value_of("rev")
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169 .expect("rev should be a required argument");
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170 let kind = match (
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171 args.is_present("changelog"),
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172 args.is_present("manifest"),
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173 ) {
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174 (true, false) => DebugDataKind::Changelog,
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175 (false, true) => DebugDataKind::Manifest,
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176 (true, true) => {
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177 unreachable!("Should not happen since options are exclusive")
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178 }
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179 (false, false) => {
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180 unreachable!("Should not happen since options are required")
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181 }
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182 };
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183 Ok(commands::debugdata::DebugDataCommand::new(rev, kind))
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184 }
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185 }