s3find 0.3.0

extern crate structopt;
#[macro_use]
extern crate failure;

extern crate clap;
extern crate glob;
extern crate regex;
extern crate rusoto_core;
extern crate version_check;

use clap::Shell;
use std::fs;
use std::io::{self, Write};
use std::process::exit;

use structopt::StructOpt;

include!("src/arg.rs");

fn main() {
    match version_check::is_min_version("1.30") {
        // rustc >= 1.30
        Some((true, _)) => {}
        // rustc < 1.20 or can't figure it out
        _ => {
            writeln!(&mut io::stderr(), "This crate requires rustc >= 1.30").unwrap();
            exit(1);
        }
    }

    let var = std::env::var_os("SHELL_COMPLETIONS_DIR").or(std::env::var_os("OUT_DIR"));
    let outdir = match var {
        None => return,
        Some(outdir) => outdir,
    };
    fs::create_dir_all(&outdir).unwrap();

    let mut app = FindOpt::clap();
    app.gen_completions("s3find", Shell::Bash, &outdir);
    app.gen_completions("s3find", Shell::Fish, &outdir);
    app.gen_completions("s3find", Shell::Zsh, &outdir);
    app.gen_completions("s3find", Shell::PowerShell, &outdir);
}