Mercurial > hg
annotate rust/rhg/src/main.rs @ 45050:18f8d3b31baa
rhg: add a limited `rhg root` subcommand
Clap has been choosen for argument parsing for the following reasons:
- it's a wildly used and maintained crate
- it can deal with OS encoding making it suitable for any encoding
- it supports nonambiguous prefix matching as already available in hg
- it will soon allow for structopts-style declarative pattern instead of the
currently used builder pattern
Differential Revision: https://phab.mercurial-scm.org/D8613
author | Antoine Cezar <antoine.cezar@octobus.net> |
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date | Tue, 07 Jul 2020 14:05:15 +0530 |
parents | 513b3ef277a3 |
children | 47997afadf08 |
rev | line source |
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45050
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rhg: add a limited `rhg root` subcommand
Antoine Cezar <antoine.cezar@octobus.net>
parents:
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1 use clap::App; |
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2 use clap::AppSettings; |
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3 use clap::SubCommand; |
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4 |
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5 mod commands; |
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6 mod error; |
44981 | 7 mod exitcode; |
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8 mod ui; |
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9 use commands::Command; |
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11 fn main() { | |
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12 let mut app = App::new("rhg") |
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13 .setting(AppSettings::AllowInvalidUtf8) |
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14 .setting(AppSettings::SubcommandRequired) |
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15 .setting(AppSettings::VersionlessSubcommands) |
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16 .version("0.0.1") |
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17 .subcommand( |
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18 SubCommand::with_name("root").about(commands::root::HELP_TEXT), |
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19 ); |
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20 |
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21 let matches = app.clone().get_matches_safe().unwrap_or_else(|_| { |
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22 std::process::exit(exitcode::UNIMPLEMENTED_COMMAND) |
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23 }); |
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24 |
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25 let command_result = match matches.subcommand_name() { |
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26 Some(name) => match name { |
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27 "root" => commands::root::RootCommand::new().run(), |
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28 _ => std::process::exit(exitcode::UNIMPLEMENTED_COMMAND), |
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29 }, |
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30 _ => { |
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31 match app.print_help() { |
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32 Ok(_) => std::process::exit(exitcode::OK), |
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33 Err(_) => std::process::exit(exitcode::ABORT), |
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34 }; |
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35 } |
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36 }; |
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37 |
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38 match command_result { |
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39 Ok(_) => std::process::exit(exitcode::OK), |
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40 Err(e) => e.exit(), |
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41 } |
44981 | 42 } |