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flagon-io/hello

public

Greets people from the command line. The sample repository for g1t.

hello/src/main.rs

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Add --times N flag that prints the greeting N times1use std::{env, process};
Greet people from the command line2
Merge #64: Add a --bye flag3use hello::{farewell, greeting_in, loud, parse_args, shout};
Greet people from the command line4
5fn main() {
Add --times N flag that prints the greeting N times6 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 };
Add --version flag that prints the crate version and exits13 if options.version {
14 println!("{}", env!("CARGO_PKG_VERSION"));
15 return;
16 }
Add --quiet flag that prints nothing17 if options.quiet {
18 return;
19 }
Greet people from the command line20 // The name given, or whoever is signed in.
Add --shout flag that upper-cases the greeting21 let name = options
Extract argument parsing into parse_args in lib.rs22 .name
Greet people from the command line23 .or_else(|| env::var("USER").ok())
24 .unwrap_or_else(|| "world".to_owned());
Merge #53: Add a --lang option (en, es, fr) to the greeter25 let message = greeting_in(&name, options.lang);
Add --loud flag that ends the greeting with three exclamation marks26 let message = if options.loud { loud(&message) } else { message };
Add --times N flag that prints the greeting N times27 let line = if options.shout { shout(&message) } else { message };
28 for _ in 0..options.times {
29 println!("{line}");
30 }
Merge #64: Add a --bye flag31 if options.bye {
32 println!("{}", farewell(&name));
33 }
Greet people from the command line34}

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