v2 to use v0.32.0 of rusoto_* libs

describe_instances_v2.rs

#[macro_use]
extern crate clap;
extern crate rusoto_core;
extern crate rusoto_ec2;
use clap::App;
use rusoto_core::{EnvironmentProvider, Region};
use rusoto_core::reactor::RequestDispatcher;
use rusoto_ec2::{Ec2Client, DescribeInstancesRequest, Ec2};

fn main() {
  let yaml = load_yaml!("cli.yml");
  let _matches = App::from_yaml(yaml).get_matches();

  let dispatcher = RequestDispatcher::default();
  // This forces the app to use credentials in env vars rather than ~/.aws/credentials
  let provider = EnvironmentProvider;
  let client = Ec2Client::new(dispatcher, provider, Region::UsEast1);
  let req = DescribeInstancesRequest::default();
  let res = client.describe_instances(&req).sync();
  if let Err(e) = res {
    println!("{}", e);
  } else {
    println!("{:?}", res);
  }
}