verco 6.3.0

A simple Git/Mercurial/PlasticSCM tui client based on keyboard shortcuts
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use std::{env, io};

mod application;
mod backend;
mod mode;
mod platform;
mod ui;

fn main() {
    let mut args = env::args();
    args.next();
    if let Some(arg) = args.next() {
        if args.next().is_some() {
            eprintln!("too many args");
        } else {
            match &arg[..] {
                "-h" | "--help" => {
                    let name = env!("CARGO_PKG_NAME");
                    let version = env!("CARGO_PKG_VERSION");
                    println!("{} v{}", name, version);
                    println!();
                    println!("{}", env!("CARGO_PKG_DESCRIPTION"));
                    println!();
                    println!("\t-h --help\tprint this help message and exit");
                    println!("\t-v --version\tprint version number and exit");
                }
                "-v" | "--version" => {
                    print!("{}", env!("CARGO_PKG_VERSION"));
                }
                arg => eprintln!("invalid argument '{}'", arg),
            }
        }
        return;
    }

    let (root, backend) = match backend::backend_from_current_repository() {
        Some((root, backend)) => (root, backend),
        None => {
            eprintln!("no repository found");
            return;
        }
    };

    if std::env::set_current_dir(&root).is_err() {
        eprintln!("could not set current dir to {:?}", root);
        return;
    }

    let (platform, platform_event_reader) = match platform::Platform::new() {
        Some(platform) => platform,
        None => return,
    };

    {
        use io::Write;
        let stdout = io::stdout();
        let mut stdout = stdout.lock();

        stdout.write_all(ui::BEGIN_TITLE_CODE).unwrap();
        stdout
            .write_all(root.as_os_str().to_string_lossy().as_bytes())
            .unwrap();
        stdout.write_all(ui::END_TITLE_CODE).unwrap();
        stdout.write_all(ui::ENTER_ALTERNATE_BUFFER_CODE).unwrap();
        stdout.write_all(ui::HIDE_CURSOR_CODE).unwrap();
        stdout.flush().unwrap();
    }

    application::run(platform_event_reader, backend);

    {
        use io::Write;
        let stdout = io::stdout();
        let mut stdout = stdout.lock();

        stdout.write_all(ui::RESET_STYLE_CODE).unwrap();
        stdout.write_all(ui::SHOW_CURSOR_CODE).unwrap();
        stdout.write_all(ui::EXIT_ALTERNATE_BUFFER_CODE).unwrap();
        stdout.flush().unwrap();
    }

    drop(platform);
}