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annotate rust/rhg/src/main.rs @ 45361:47997afadf08

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rhg: ask the error message from `CommandError` Avoid repeating the display of the same error messages in different commands. Differential Revision: https://phab.mercurial-scm.org/D8865
author Antoine Cezar <antoine.cezar@octobus.net>
date Mon, 20 Jul 2020 18:14:52 +0200
parents 18f8d3b31baa
children 26440adbe3e9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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;
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7 mod exitcode;
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8 mod ui;
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9 use commands::Command;
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10
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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 ui = ui::Ui::new();
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26
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27 let command_result = match matches.subcommand_name() {
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28 Some(name) => match name {
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29 "root" => commands::root::RootCommand::new(&ui).run(),
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30 _ => std::process::exit(exitcode::UNIMPLEMENTED_COMMAND),
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31 },
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32 _ => {
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33 match app.print_help() {
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34 Ok(_) => std::process::exit(exitcode::OK),
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35 Err(_) => std::process::exit(exitcode::ABORT),
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36 };
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37 }
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38 };
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39
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40 match command_result {
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41 Ok(_) => std::process::exit(exitcode::OK),
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42 Err(e) => {
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43 let message = e.get_error_message_bytes();
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44 if let Some(msg) = message {
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45 match ui.write_stderr(&msg) {
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46 Ok(_) => (),
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47 Err(_) => std::process::exit(exitcode::ABORT),
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48 };
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49 };
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50 e.exit()
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51 }
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52 }
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53 }