Mercurial > hg
annotate rust/rhg/src/main.rs @ 45542:33ded2d3f4fc
rhg: add a limited `rhg cat -r` subcommand
It only supports revision specification (rev or full hash) and the list of files
to cat.
Differential Revision: https://phab.mercurial-scm.org/D9052
author | Antoine Cezar <antoine.cezar@octobus.net> |
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date | Tue, 15 Sep 2020 16:51:11 +0200 |
parents | 2f8227a12592 |
children | ead435aa5294 |
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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14 mod ui; |
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15 use commands::Command; |
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16 use error::CommandError; |
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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 |
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88 let matches = app.clone().get_matches_safe().unwrap_or_else(|err| { |
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89 let _ = ui::Ui::new().writeln_stderr_str(&err.message); |
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90 std::process::exit(exitcode::UNIMPLEMENTED_COMMAND) |
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91 }); |
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92 |
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93 let ui = ui::Ui::new(); |
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94 |
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95 let command_result = match_subcommand(matches, &ui); |
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96 |
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97 match command_result { |
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98 Ok(_) => std::process::exit(exitcode::OK), |
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99 Err(e) => { |
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100 let message = e.get_error_message_bytes(); |
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101 if let Some(msg) = message { |
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102 match ui.write_stderr(&msg) { |
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103 Ok(_) => (), |
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104 Err(_) => std::process::exit(exitcode::ABORT), |
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105 }; |
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106 }; |
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107 e.exit() |
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108 } |
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109 } |
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111 |
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112 fn match_subcommand( |
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113 matches: ArgMatches, |
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114 ui: &ui::Ui, |
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115 ) -> Result<(), CommandError> { |
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116 match matches.subcommand() { |
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117 ("root", _) => commands::root::RootCommand::new().run(&ui), |
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118 ("files", Some(matches)) => { |
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119 commands::files::FilesCommand::try_from(matches)?.run(&ui) |
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120 } |
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121 ("cat", Some(matches)) => { |
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122 commands::cat::CatCommand::try_from(matches)?.run(&ui) |
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123 } |
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124 ("debugdata", Some(matches)) => { |
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125 commands::debugdata::DebugDataCommand::try_from(matches)?.run(&ui) |
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126 } |
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127 _ => unreachable!(), // Because of AppSettings::SubcommandRequired, |
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128 } |
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129 } |
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130 |
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131 impl<'a> TryFrom<&'a ArgMatches<'_>> for commands::files::FilesCommand<'a> { |
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132 type Error = CommandError; |
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133 |
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134 fn try_from(args: &'a ArgMatches) -> Result<Self, Self::Error> { |
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135 let rev = args.value_of("rev"); |
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136 Ok(commands::files::FilesCommand::new(rev)) |
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137 } |
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138 } |
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139 |
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140 impl<'a> TryFrom<&'a ArgMatches<'_>> for commands::cat::CatCommand<'a> { |
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141 type Error = CommandError; |
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142 |
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143 fn try_from(args: &'a ArgMatches) -> Result<Self, Self::Error> { |
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144 let rev = args.value_of("rev"); |
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145 let files = match args.values_of("files") { |
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146 Some(files) => files.collect(), |
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147 None => vec![], |
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148 }; |
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149 Ok(commands::cat::CatCommand::new(rev, files)) |
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150 } |
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151 } |
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152 |
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153 impl<'a> TryFrom<&'a ArgMatches<'_>> |
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154 for commands::debugdata::DebugDataCommand<'a> |
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155 { |
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156 type Error = CommandError; |
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157 |
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158 fn try_from(args: &'a ArgMatches) -> Result<Self, Self::Error> { |
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159 let rev = args |
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160 .value_of("rev") |
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161 .expect("rev should be a required argument"); |
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162 let kind = match ( |
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163 args.is_present("changelog"), |
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164 args.is_present("manifest"), |
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165 ) { |
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166 (true, false) => DebugDataKind::Changelog, |
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167 (false, true) => DebugDataKind::Manifest, |
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168 (true, true) => { |
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169 unreachable!("Should not happen since options are exclusive") |
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170 } |
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171 (false, false) => { |
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172 unreachable!("Should not happen since options are required") |
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173 } |
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174 }; |
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175 Ok(commands::debugdata::DebugDataCommand::new(rev, kind)) |
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176 } |
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177 } |