Mercurial > hg-stable
view rust/rhg/src/main.rs @ 45051:18f8d3b31baa
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> |
---|---|
date | Tue, 07 Jul 2020 14:05:15 +0530 |
parents | 513b3ef277a3 |
children | 47997afadf08 |
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use clap::App; use clap::AppSettings; use clap::SubCommand; mod commands; mod error; mod exitcode; mod ui; use commands::Command; fn main() { let mut app = App::new("rhg") .setting(AppSettings::AllowInvalidUtf8) .setting(AppSettings::SubcommandRequired) .setting(AppSettings::VersionlessSubcommands) .version("0.0.1") .subcommand( SubCommand::with_name("root").about(commands::root::HELP_TEXT), ); let matches = app.clone().get_matches_safe().unwrap_or_else(|_| { std::process::exit(exitcode::UNIMPLEMENTED_COMMAND) }); let command_result = match matches.subcommand_name() { Some(name) => match name { "root" => commands::root::RootCommand::new().run(), _ => std::process::exit(exitcode::UNIMPLEMENTED_COMMAND), }, _ => { match app.print_help() { Ok(_) => std::process::exit(exitcode::OK), Err(_) => std::process::exit(exitcode::ABORT), }; } }; match command_result { Ok(_) => std::process::exit(exitcode::OK), Err(e) => e.exit(), } }