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// This file is part of the uutils coreutils package.
//
// For the full copyright and license information, please view the LICENSE
// file that was distributed with this source code.

use std::ffi::OsString;

use clap::{crate_version, Command};

use uucore::display::println_verbatim;
use uucore::error::{FromIo, UResult};
use uucore::{format_usage, help_about, help_usage};

mod platform;

const ABOUT: &str = help_about!("whoami.md");
const USAGE: &str = help_usage!("whoami.md");

#[uucore::main]
pub fn uumain(args: impl uucore::Args) -> UResult<()> {
    uu_app().try_get_matches_from(args)?;
    let username = whoami()?;
    println_verbatim(username).map_err_context(|| "failed to print username".into())?;
    Ok(())
}

/// Get the current username
pub fn whoami() -> UResult<OsString> {
    platform::get_username().map_err_context(|| "failed to get username".into())
}

pub fn uu_app() -> Command {
    Command::new(uucore::util_name())
        .version(crate_version!())
        .about(ABOUT)
        .override_usage(format_usage(USAGE))
        .infer_long_args(true)
}