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

extern crate clap;
extern crate thinp;

use atty::Stream;
use clap::{App, Arg};
use std::path::Path;
use std::process;
use std::process::exit;
use std::sync::Arc;
use thinp::file_utils;
use thinp::report::*;
use thinp::thin::dump::{dump, ThinDumpOptions};

fn main() {
    let parser = App::new("thin_dump")
        .version(thinp::version::tools_version())
        .about("Dump thin-provisioning metadata to stdout in XML format")
        .arg(
            Arg::with_name("QUIET")
                .help("Suppress output messages, return only exit code.")
                .short("q")
                .long("quiet"),
        )
        .arg(
            Arg::with_name("REPAIR")
                .help("Repair the metadata whilst dumping it")
                .short("r")
                .long("repair"),
        )
        .arg(
            Arg::with_name("SKIP_MAPPINGS")
                .help("Do not dump the mappings")
                .long("skip-mappings"),
        )
        .arg(
            Arg::with_name("SYNC_IO")
                .help("Force use of synchronous io")
                .long("sync-io"),
        )
        .arg(
            Arg::with_name("METADATA_SNAPSHOT")
                .help("Access the metadata snapshot on a live pool")
                .short("m")
                .long("metadata-snapshot")
                .value_name("METADATA_SNAPSHOT"),
        )
        .arg(
            Arg::with_name("OUTPUT")
                .help("Specify the output file rather than stdout")
                .short("o")
                .long("output")
                .value_name("OUTPUT"),
        )
        .arg(
            Arg::with_name("INPUT")
                .help("Specify the input device to dump")
                .required(true)
                .index(1),
        );

    let matches = parser.get_matches();
    let input_file = Path::new(matches.value_of("INPUT").unwrap());
    let output_file = if matches.is_present("OUTPUT") {
        Some(Path::new(matches.value_of("OUTPUT").unwrap()))
    } else {
        None
    };

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

    let report;

    if matches.is_present("QUIET") {
        report = std::sync::Arc::new(mk_quiet_report());
    } else if atty::is(Stream::Stdout) {
        report = std::sync::Arc::new(mk_progress_bar_report());
    } else {
        report = Arc::new(mk_simple_report());
    }

    let opts = ThinDumpOptions {
        input: input_file,
        output: output_file,
        async_io: !matches.is_present("SYNC_IO"),
        report,
    };

    if let Err(reason) = dump(opts) {
        println!("{}", reason);
        process::exit(1);
    }
}