| 1 | use std::{env, process}; |
| 2 | |
| 3 | use hello::{greeting, parse_args, shout}; |
| 4 | |
| 5 | fn main() { |
| 6 | let options = match parse_args(env::args().skip(1)) { |
| 7 | Ok(options) => options, |
| 8 | Err(message) => { |
| 9 | eprintln!("error: {message}"); |
| 10 | process::exit(2); |
| 11 | } |
| 12 | }; |
| 13 | if options.version { |
| 14 | println!("{}", env!("CARGO_PKG_VERSION")); |
| 15 | return; |
| 16 | } |
| 17 | // The name given, or whoever is signed in. |
| 18 | let name = options |
| 19 | .name |
| 20 | .or_else(|| env::var("USER").ok()) |
| 21 | .unwrap_or_else(|| "world".to_owned()); |
| 22 | let message = greeting(&name); |
| 23 | let line = if options.shout { shout(&message) } else { message }; |
| 24 | for _ in 0..options.times { |
| 25 | println!("{line}"); |
| 26 | } |
| 27 | } |