src/main.rs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

use std::fs::File;
use std::io::{self, BufRead, BufReader, Read, Write};
use structopt::StructOpt;

mod choice;
mod config;
use config::Config;

fn main() {
    let opt = config::Opt::from_args();
    let config = Config::new(opt);

    let read = match &config.opt.input {
        Some(f) => Box::new(File::open(f).expect("Could not open file")) as Box<dyn Read>,
        None => Box::new(io::stdin()) as Box<dyn Read>,
    };

    let buf = BufReader::new(read);

    let stdout = io::stdout();
    let lock = stdout.lock();
    let mut handle = io::BufWriter::new(lock);

    let lines = buf.lines();
    for line in lines {
        match line {
            Ok(l) => {
                for choice in &config.opt.choice {
                    choice.print_choice(&l, &config, &mut handle);
                }
                match handle.write(b"\n") {
                    Ok(_) => (),
                    Err(e) => eprintln!("Failed to write to output: {}", e)
                }
            }
            Err(e) => println!("Failed to read line: {}", e),
        }
    }
}