thin-provisioning-tools/src/bin/thin_metadata_unpack.rs

extern crate clap;
extern crate thinp;

use clap::{App, Arg};
use std::path::Path;
use std::process;
use thinp::file_utils;

use std::process::exit;

fn main() {
    let parser = App::new("thin_metadata_unpack")
        .version(thinp::version::TOOLS_VERSION)
        .about("Unpack a compressed file of thin metadata.")
        .arg(
            Arg::with_name("INPUT")
                .help("Specify thinp metadata binary device/file")
                .required(true)
                .short("i")
                .value_name("DEV")
                .takes_value(true),
        )
        .arg(
            Arg::with_name("OUTPUT")
                .help("Specify packed output file")
                .required(true)
                .short("o")
                .value_name("FILE")
                .takes_value(true),
        );

    let matches = parser.get_matches();
    let input_file = Path::new(matches.value_of("INPUT").unwrap());
    let output_file = Path::new(matches.value_of("OUTPUT").unwrap());

    if !file_utils::file_exists(input_file) {
        eprintln!("Couldn't find input file '{}'.", &input_file.display());
        exit(1);
    }

    if let Err(reason) = thinp::pack::toplevel::unpack(&input_file, &output_file) {
        println!("Application error: {}", reason);
        process::exit(1);
    }
}