names-main.rs

main.rs

use std::collections::HashSet;
use std::fs::File;
use std::io::{self, BufRead, BufReader};
use std::path::Path;

fn variants(word: &str) -> Vec<String> {
    let mut result = vec![word.to_string()];
    let capitalized = word.to_ascii_uppercase();
    result.push(capitalized);
    let upper = word.to_uppercase();
    result.push(upper);
    result
}

fn main() {
    let mut args = std::env::args().skip(1);
    if args.len() < 5 {
        return;
    }
    let usernames = ["frost"];
    let roles = ["user", "root"];
    let separators = ["", "_"];
    if args.next().unwrap().as_bytes()[1] == b'f' {
        usernames.clear();
        usernames.extend(args.next().unwrap().split_whitespace());
    }
    if args.next().unwrap().as_bytes()[1] == b'o' {
        roles.clear();
        roles.extend(args.next().unwrap().split_whitespace());
        roles.extend(args.next().unwrap().split_whitespace());
    }
    for username in usernames {
        for role in roles {
            for separator in separators {
                for variant in variants(&username) {
                    for variant2 in variants(&role) {
                        println!("{}{}{}", variant, separator, variant2);
                    }
                }
            }
        }
    }
}