2015-03-15 21:17:52 +00:00
|
|
|
extern crate clap;
|
|
|
|
|
2015-04-14 19:34:44 +00:00
|
|
|
use clap::{App, SubCommand};
|
2015-03-15 21:17:52 +00:00
|
|
|
|
|
|
|
fn main() {
|
2015-03-16 13:52:18 +00:00
|
|
|
|
2015-04-14 02:18:50 +00:00
|
|
|
// This example shows how to create an application with several arguments using usage strings, which can be
|
|
|
|
// far less verbose that shown in 01b_QuickExample.rs, but is more readable. The downside is you cannot set
|
|
|
|
// the more advanced configuration options using this method (well...actually you can, you'll see ;) )
|
|
|
|
//
|
2015-03-16 18:47:09 +00:00
|
|
|
// Create an application with 5 possible arguments (2 auto generated) and 2 subcommands (1 auto generated)
|
|
|
|
// - A config file
|
|
|
|
// + Uses "-c filename" or "--config filename"
|
|
|
|
// - An output file
|
|
|
|
// + A positional argument (i.e. "$ myapp output_filename")
|
|
|
|
// - A debug flag
|
|
|
|
// + Uses "-d" or "--debug"
|
|
|
|
// + Allows multiple occurrences of such as "-dd" (for vary levels of debugging, as an example)
|
|
|
|
// - A help flag (automatically generated by clap)
|
|
|
|
// + Uses "-h" or "--help" (Only autogenerated if you do NOT specify your own "-h" or "--help")
|
|
|
|
// - A version flag (automatically generated by clap)
|
2015-06-17 00:46:11 +00:00
|
|
|
// + Uses "-V" or "--version" (Only autogenerated if you do NOT specify your own "-V" or "--version")
|
2015-03-16 18:47:09 +00:00
|
|
|
// - A subcommand "test" (subcommands behave like their own apps, with their own arguments
|
|
|
|
// + Used by "$ myapp test" with the following arguments
|
|
|
|
// > A list flag
|
|
|
|
// = Uses "-l" (usage is "$ myapp test -l"
|
|
|
|
// > A help flag (automatically generated by clap
|
|
|
|
// = Uses "-h" or "--help" (full usage "$ myapp test -h" or "$ myapp test --help")
|
|
|
|
// > A version flag (automatically generated by clap
|
2015-06-17 00:46:11 +00:00
|
|
|
// = Uses "-V" or "--version" (full usage "$ myapp test -V" or "$ myapp test --version")
|
2015-03-16 18:47:09 +00:00
|
|
|
// - A subcommand "help" (automatically generated by clap because we specified a subcommand of our own)
|
|
|
|
// + Used by "$ myapp help" (same functionality as "-h" or "--help")
|
|
|
|
let matches = App::new("MyApp")
|
|
|
|
.version("1.0")
|
|
|
|
.author("Kevin K. <kbknapp@gmail.com>")
|
|
|
|
.about("Does awesome things")
|
2015-04-14 02:18:50 +00:00
|
|
|
.args_from_usage("-c --config=[conf] 'Sets a custom config file'
|
|
|
|
[output] 'Sets an optional output file'
|
|
|
|
[debug]... -d 'Turn debugging information on'")
|
2015-06-30 02:21:47 +00:00
|
|
|
.subcommand(SubCommand::with_name("test")
|
2015-03-16 18:47:09 +00:00
|
|
|
.about("does testing things")
|
2015-04-14 02:18:50 +00:00
|
|
|
.arg_from_usage("[list] -l 'lists test values'"))
|
2015-03-16 18:47:09 +00:00
|
|
|
.get_matches();
|
2015-03-15 21:17:52 +00:00
|
|
|
|
2015-03-16 18:47:09 +00:00
|
|
|
// You can check the value provided by positional arguments, or option arguments
|
|
|
|
if let Some(o) = matches.value_of("output") {
|
|
|
|
println!("Value for output: {}", o);
|
|
|
|
}
|
2015-03-15 21:17:52 +00:00
|
|
|
|
2015-03-16 18:47:09 +00:00
|
|
|
if let Some(c) = matches.value_of("config") {
|
|
|
|
println!("Value for config: {}", c);
|
|
|
|
}
|
2015-03-15 21:17:52 +00:00
|
|
|
|
2015-03-16 18:47:09 +00:00
|
|
|
// You can see how many times a particular flag or argument occurred
|
|
|
|
// Note, only flags can have multiple occurrences
|
|
|
|
match matches.occurrences_of("debug") {
|
2015-03-19 02:00:01 +00:00
|
|
|
0 => println!("Debug mode is off"),
|
2015-03-16 18:47:09 +00:00
|
|
|
1 => println!("Debug mode is kind of on"),
|
|
|
|
2 => println!("Debug mode is on"),
|
|
|
|
3 | _ => println!("Don't be crazy"),
|
|
|
|
}
|
2015-03-15 21:17:52 +00:00
|
|
|
|
2015-05-06 00:21:13 +00:00
|
|
|
// You can check for the existence of subcommands, and if found use their
|
2015-03-16 18:47:09 +00:00
|
|
|
// matches just as you would the top level app
|
|
|
|
if let Some(ref matches) = matches.subcommand_matches("test") {
|
|
|
|
// "$ myapp test" was run
|
|
|
|
if matches.is_present("list") {
|
|
|
|
// "$ myapp test -l" was run
|
|
|
|
println!("Printing testing lists...");
|
|
|
|
} else {
|
|
|
|
println!("Not printing testing lists...");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// Continued program logic goes here...
|
2015-03-16 13:52:18 +00:00
|
|
|
}
|