#![crate_id(name="unlink", vers="1.0.0", author="zvms")]

/*
 * This file is part of the uutils coreutils package.
 *
 * (c) Colin Warren <me@zv.ms>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/* last synced with: unlink (GNU coreutils) 8.21 */

#![feature(macro_rules)]

extern crate getopts;
extern crate libc;

use std::os;
use std::io;
use std::io::fs;
use std::io::print;

#[path = "../common/util.rs"]
mod util;

static NAME: &'static str = "unlink";

#[allow(dead_code)]
fn main() { os::set_exit_status(uumain(os::args())); }

pub fn uumain(args: Vec<String>) -> int {
    let program = args.get(0).clone();
    let opts = [
        getopts::optflag("h", "help", "display this help and exit"),
        getopts::optflag("V", "version", "output version information and exit"),
    ];

    let matches = match getopts::getopts(args.tail(), opts) {
        Ok(m) => m,
        Err(f) => {
            crash!(1, "invalid options\n{}", f)
        }
    };

    if matches.opt_present("help") {
        println!("unlink 1.0.0");
        println!("");
        println!("Usage:");
        println!("  {0:s} [FILE]... [OPTION]...", program);
        println!("");
        print(getopts::usage("Unlink the file at [FILE].", opts).as_slice());
        return 0;
    }

    if matches.opt_present("version") {
        println!("unlink 1.0.0");
        return 0;
    }

    if matches.free.len() == 0 {
        crash!(1, "missing operand\nTry '{0:s} --help' for more information.", program);
    } else if matches.free.len() > 1 {
        crash!(1, "extra operand: '{1}'\nTry '{0:s} --help' for more information.", program, matches.free.get(1));
    }

    let path = Path::new(matches.free.get(0).clone());

    let result = path.lstat().and_then(|info| {
        match info.kind {
            io::TypeFile => Ok(()),
            io::TypeSymlink => Ok(()),
            _ => Err(io::IoError {
                kind: io::OtherIoError,
                desc: "is not a file or symlink",
                detail: None
            })
        }
    }).and_then(|_| {
        fs::unlink(&path)
    });

    match result {
        Ok(_) => (),
        Err(e) => {
            crash!(1, "cannot unlink '{0}': {1}", path.display(), e.desc);
        }
    }

    0
}