src/vendor/docopt/examples/verbose_multiple.rs

   1 extern crate rustc_serialize;
   2 extern crate docopt;
   3
   4 use docopt::Docopt;
   5
   6 // This shows how to implement multiple levels of verbosity.
   7 //
   8 // When you have multiple patterns, I think the only way to carry the
   9 // repeated flag through all of them is to specify it for each pattern
  10 // explicitly.
  11 //
  12 // This is unfortunate.
  13 const USAGE: &'static str = "
  14 Usage: cp [options] [-v | -vv | -vvv] <source> <dest>
  15        cp [options] [-v | -vv | -vvv] <source>... <dir>
  16
  17 Options:
  18     -a, --archive  Copy everything.
  19     -v, --verbose  Show extra log output.
  20 ";
  21
  22 #[derive(Debug, RustcDecodable)]
  23 struct Args {
  24     arg_source: Vec<String>,
  25     arg_dest: String,
  26     arg_dir: String,
  27     flag_archive: bool,
  28     flag_verbose: usize,
  29 }
  30
  31 fn main() {
  32     let args: Args = Docopt::new(USAGE)
  33                             .and_then(|d| d.decode())
  34                             .unwrap_or_else(|e| e.exit());
  35     println!("{:?}", args);
  36 }