Simple command line flag parser for rust.
use easy_flag::FlagSet;
fn main() -> Result<(), String>{
let mut help = false;
let mut my_flag = String::from("default value");
let args: Vec<String> = std::env::args().collect();
let mut my_set = FlagSet::new(&args[0])
.add("-h, --help", &mut help, "Prints help message.")
.add("-m, --my-flag", &mut my_flag, "Help message for my_flag with string `value`");
if let Err(err) = my_set.parse(&args[1..]) {
println!("{}", my_set.defaults());
return Err(err);
}
let usage = my_set.usage();
if help {
println!("{}", usage);
return Ok(());
}
println!("my_flag flag value: {}", my_flag);
Ok(())
}