//! Parse Git CLI arguments and return Git-compatible usage and operation exit codes.
use clap::{Parser, error::ErrorKind};
fn main() {
    if matches!(std::env::args().nth(1).as_deref(), Some("--version" | "version")) {
        println!("git version {}.sausage", env!("CARGO_PKG_VERSION"));
        exit(0);
    }
    let cli = match git::Cli::try_parse() {
        Ok(cli) => cli,
        Err(error) => {
            let code = if !error.use_stderr() {
                0
            } else {
                match error.kind() {
                    ErrorKind::InvalidSubcommand | ErrorKind::MissingSubcommand => 1,
                    _ => 129,
                }
            };
            let _ = error.print();
            exit(code);
        }
    };
    let code = match git::run(cli) {
        Ok(code) => code,
        Err(error) => {
            eprintln!("fatal: {error}");
            128
        }
    };
    exit(code);
}
fn exit(code: i32) -> ! {
    #[cfg(target_os = "wasi")]
    {
        use std::io::Write;
        let _ = std::io::stdout().flush();
        let _ = std::io::stderr().flush();
        wasi::cli::exit::exit_with_code(code as u8);
        unreachable!("WASI exit returned");
    }
    #[cfg(not(target_os = "wasi"))]
    std::process::exit(code)
}