clap/examples/02_apps.rs

30 lines
1.3 KiB
Rust

extern crate clap;
use clap::App;
fn main() {
// Apps describe the top level application
//
// You create an App and set various options on that App using the "builder pattern"
//
// The options (version(), author(), about()) aren't mandatory, but recommended. There is
// another option, usage(), which is an exception to the rule. This should only be used when
// the default usage string automatically generated by clap doesn't suffice.
//
// You also set all the valid arguments your App should accept via the arg(), args(), arg_from_usage()
// and args_from_usage() (as well as subcommands via the subcommand() and subcommands() methods) which
// will be covered later.
//
// Once all options have been set, call .get_matches() in order to start the parsing and find all valid
// command line arguments that supplied by the user at runtime. The name given to new() will be displayed
// when the version or help flags are used.
App::new("MyApp")
.version("1.0")
.author("Kevin K. <kbknapp@gmail.com>")
.about("Does awesome things")
.get_matches();
// This example doesn't do much, but it *does* give automatic -h, --help, -V, and --version functionality ;)
// Continued program logic goes here...
}