rust で CLI Parser とスレッドがうまく行かなかったやつ解決した。すごい

main.rs

extern crate reqwest;

use structopt::StructOpt;
use std::thread;
use std::sync::mpsc;
use std::sync::Arc;

#[derive(StructOpt, Debug, Clone)]
#[structopt()]
struct Opt {
    // PATH
    #[structopt(name = "PATH")]
    path: String,
}

fn main() {
    let _opt = Opt::from_args();
    let opt = Arc::new(_opt.clone());
    println!("{:#?}", opt);

    let client = Arc::new(reqwest::Client::new());
    let mut children = Vec::new();
    // let url: Arc<&str> = Arc::new(&opt.path);
    for _ in 0..2 {
        let client = Arc::clone(&client);
        let opt = Arc::clone(&opt);
        let child = thread::spawn(move || {
            let url = &opt.path;
            client.get(url).send();
        });
        children.push(child);
    }

    for c in children {
        c.join();
    }
}