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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());
}
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