compress_file.rs - mozsearch

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use flate2::write::GzEncoder;

use flate2::Compression;

use std::env::args;

use std::fs::File;

use std::io::copy;

use std::io::BufReader;

use std::time::Instant;

fn main() {

    if args().len() != 3 {

        eprintln!("Usage: ./compress_file `source` `target`");

        return;

    let mut input = BufReader::new(File::open(args().nth(1).unwrap()).unwrap());

    let output = File::create(args().nth(2).unwrap()).unwrap();

    let mut encoder = GzEncoder::new(output, Compression::default());

    let start = Instant::now();

    copy(&mut input, &mut encoder).unwrap();

    let output = encoder.finish().unwrap();

    println!(

        "Source len: {:?}",

        input.get_ref().metadata().unwrap().len()

);

    println!("Target len: {:?}", output.metadata().unwrap().len());

    println!("Elapsed: {:?}", start.elapsed());