mirror of
https://github.com/clap-rs/clap
synced 2024-09-21 06:41:54 +00:00
bfa02fd418
This ports our example testing over to [trycmd](https://docs.rs/) so we can: - More thoroughly test our examples - Provide always-up-to-date example usage The old way of testing automatically picked up examples. This new way requires we have a `.md` file that uses the example in some way. Notes: - Moved overall example description to the `.md` file - I added cross-linking between related examples - `14_groups` had a redundant paragraph (twice talked about "one and only one"
40 lines
1.6 KiB
Rust
40 lines
1.6 KiB
Rust
use clap::{App, Arg};
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fn main() {
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// Just like arg() and args(), subcommands can be specified one at a time via subcommand() or
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// multiple ones at once with a Vec<App> provided to subcommands().
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let matches = App::new("MyApp")
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.version("1.0")
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// Normal App and Arg configuration goes here...
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// In the following example assume we wanted an application which
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// supported an "add" subcommand, this "add" subcommand also took
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// one positional argument of a file to add:
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.subcommand(
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App::new("add") // The name we call argument with
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.about("Adds files to myapp") // The message displayed in "myapp -h"
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// or "myapp help"
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.version("0.1") // Subcommands can have independent version
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.author("Kevin K.") // And authors
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.arg(
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Arg::new("input") // And their own arguments
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.help("the file to add")
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.index(1)
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.required(true),
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),
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)
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.get_matches();
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// Most commonly, you'll get the name and matches at the same time
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match matches.subcommand() {
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Some(("add", sub_matches)) => println!(
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"'myapp add' was used, input is: {}",
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sub_matches
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.value_of("input")
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.expect("'input' is required and parsing will fail if its missing")
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),
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None => println!("No subcommand was used"),
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_ => println!("Some other subcommand was used"),
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}
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// Continued program logic goes here...
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}
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