vendor/tar/examples/extract_file.rs


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//! An example of extracting a file in an archive.
//!
//! Takes a tarball on standard input, looks for an entry with a listed file
//! name as the first argument provided, and then prints the contents of that
//! file to stdout.

extern crate tar;

use std::env::args_os;
use std::io::{copy, stdin, stdout};
use std::path::Path;

use tar::Archive;

fn main() {
    let first_arg = args_os().skip(1).next().unwrap();
    let filename = Path::new(&first_arg);
    let mut ar = Archive::new(stdin());
    for file in ar.entries().unwrap() {
        let mut f = file.unwrap();
        if f.path().unwrap() == filename {
            copy(&mut f, &mut stdout()).unwrap();
        }
    }
}