clap-port-flag

Easily add a --port flag to CLIs using Structopt.

Usage

With the following code in src/main.rs:

```rust extern crate clapportflag;

[macro_use] extern crate structopt;

use structopt::StructOpt; use clapportflag::Port;

[derive(Debug, StructOpt)]

struct Cli { #[structopt(flatten)] port: Port, }

fn main() { let args = Cli::fromargs(); let _tcplistener = args.port.bind().unwrap(); } ```

When you run the binary, it'll provide the following output:

```txt my-cool-app 0.2.0 Alice Person alice@person.com Application that does things over TCP.

USAGE: main [OPTIONS]

FLAGS: -h, --help Prints help information -V, --version Prints version information

OPTIONS: --listen-fd A previously opened network socket. [env: LISTEN_FD=] -a, --address The network address to listen to. [default: 127.0.0.1] -p, --port The network port to listen to. [env: PORT=] ```

Installation

sh $ cargo add clap-port-flag

Acknowledgements

The original version of this crate was sketched out by @TeXitoi in rust-lang-nursery/cli-wg#37.

License

MIT OR Apache-2.0