examples/hello_runfiles/hello_runfiles.rs

use std::fs::File;
use std::io::prelude::*;

use runfiles::Runfiles;

fn main() {
    let r = Runfiles::create().unwrap();

    let mut f =
        File::open(runfiles::rlocation!(r, "examples/hello_runfiles/hello_runfiles.rs").unwrap())
            .unwrap();

    let mut buffer = String::new();
    f.read_to_string(&mut buffer).unwrap();

    println!("This program's source is {} characters long.", buffer.len());
}