Mercurial > public > mercurial-scm > hg
diff 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> |
|---|---|
| date | Tue, 07 Jul 2020 14:05:15 +0530 |
| parents | 513b3ef277a3 |
| children | 47997afadf08 |
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--- a/rust/rhg/src/main.rs Fri Jun 05 09:01:35 2020 +0200 +++ b/rust/rhg/src/main.rs Tue Jul 07 14:05:15 2020 +0530 @@ -1,8 +1,42 @@ +use clap::App; +use clap::AppSettings; +use clap::SubCommand; + mod commands; mod error; mod exitcode; mod ui; +use commands::Command; fn main() { - std::process::exit(exitcode::UNIMPLEMENTED_COMMAND) + 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(), + } }