stris(1): modernize code

src/stris.rs

@@ -23,9 +23,9 @@ use std::{
 };
 
 extern crate getopt;
-use getopt::{ Opt, Parser };
-
 extern crate sysexits;
+
+use getopt::GetOpt;
 use sysexits::EX_USAGE;
 
 struct Reqs {
@@ -34,45 +34,39 @@ struct Reqs {
 }
 
 fn usage(s: &str) -> ExitCode {
-	eprintln!("Usage: {} (-7bcdlu) (-i [inclusions]) [strings...]", s);
+	eprintln!("Usage: {} [-7bcdlu] [-i inclusions] [strings...]", s);
 	ExitCode::from(EX_USAGE as u8)
 }
 
 fn main() -> ExitCode {
 	let argv = args().collect::<Vec<String>>();
-	let mut opts = Parser::new(&argv, "7bcdi:lu");
+	let mut optind = 1;
 	let mut reqs = Reqs {
 		ascii: false, blank: false, cntrl: false, digit: false, lower: false,
 		upper: false, inuse: false, extra: String::new()
 	};
 
-	loop {
-		match opts.next() {
-			None => break,
-			Some(opt) => {
-				match opt {
-					Ok(Opt('7', None)) => reqs.ascii = true,
-					Ok(Opt('b', None)) => reqs.blank = true,
-					Ok(Opt('c', None)) => reqs.cntrl = true,
-					Ok(Opt('d', None)) => reqs.digit = true,
-					Ok(Opt('i', Some(arg))) => reqs.extra = arg,
-					Ok(Opt('l', None)) => reqs.lower = true,
-					Ok(Opt('u', None)) => reqs.upper = true,
-					_ => { return usage(&argv[0]); }
-				}
-				reqs.inuse = true;
-			}
+	while let Some(opt) = argv.getopt("7bcdi:lu") {
+		match opt.opt() {
+			Ok("7") => reqs.ascii = true,
+			Ok("b") => reqs.blank = true,
+			Ok("c") => reqs.cntrl = true,
+			Ok("d") => reqs.digit = true,
+			Ok("i") => reqs.extra = opt.arg().unwrap(),
+			Ok("l") => reqs.lower = true,
+			Ok("u") => reqs.upper = true,
+			_ => { return usage(&argv[0]); }
 		}
+		optind = opt.ind();
+		reqs.inuse = true;
 	}
 
-	if argv.len() == opts.index() {
-		return usage(&argv[0]);
-	}
+	if argv.len() == optind { return usage(&argv[0]); }
 
 	drop(argv);
 
 	if reqs.inuse {
-		for arg in args().skip(opts.index()) {
+		for arg in args().skip(optind) {
 			for c in arg.chars() {
 				if (reqs.ascii && c.is_ascii())
 						|| (reqs.blank && c.is_whitespace())