Remove dependency on 'getopts'

As described in 0b12b2bae1130746ed49cc3c7a2daa819ede1b58, we don't need
to depend on 'getopts' because we don't have any command line options,
just a single required argument.

Rewrite our code to factor out getopts and assume that the first
argument to our program is an alias file path.

1 files changed, 2 insertions, 11 deletions

diff --git a/src/main.rs b/src/main.rs
index 6b9d79e..75e74ac 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,6 +1,3 @@
-extern crate getopts;
-
-use getopts::Options;
 use std::env;
 use std::error::{self, Error};
 use std::io::{self, BufRead, BufReader, Write};
@@ -168,15 +165,9 @@ fn print_usage(program: &str) {
 fn main() {
     let args: Vec<String> = env::args().collect();
     let program = args[0].clone();
-    let opts = Options::new();
-
-    let opt_matches = match opts.parse(&args[1..]) {
-        Ok(m) => m,
-        Err(f) => panic!(f.to_string()),
-    };
 
-    let file = if !opt_matches.free.is_empty() {
-        opt_matches.free[0].clone()
+    let file = if args.len() > 1 {
+        &args[1]
     } else {
         print_usage(&program);
         return;