Default path - return PathBuf

• PathBuf

• args

• The user must supply the path to root and optionally the path to the pages.

• If the user does not supply the path to the pages then we use root/pages

fn main() {
    let args: Vec<String> = std::env::args().collect();
    if args.len() < 2 || args.len() > 3 {
        eprintln!("Usage: {} ROOT [PATH]", args[0]);
        std::process::exit(1);
    }
    let root = &args[1];
    let page = get_path(&args);
    println!("root: {}", root);
    println!("page: {:?}", page);
}

fn get_path(args: &[String]) -> std::path::PathBuf {
    if args.len() == 3 {
        return std::path::PathBuf::from(&args[2]);
    }
    let pb = std::path::PathBuf::from(&args[1]);
    pb.join("pages")
}

Returning the second parameter as the path to pages:

$ cargo run one two

root: one
page: "two"

Returning root/pages:

$ cargo run one
root: one
page: "one/pages"