Use clap for CLI argument parsing

1 files changed, 30 insertions, 7 deletions

diff --git a/src/main.rs b/src/main.rs
index 87dd041..1ec5174 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
-use std::env;
+extern crate clap;
+
 use std::fs;
 use std::io;
 use std::io::prelude::*;
@@ -45,13 +46,35 @@ fn cli_controller(asyncpair: Arc<(Mutex<bool>, Condvar)>) {
 }
 
 fn main() {
-    let args: Vec<_> = env::args().collect();
-    if args.len() < 2 {
-        println!("Please, specify ihex file");
-        return;
-    }
+    let cli_args_matches = clap::App::new("x51emu")
+        .version("0.1.0")
+        .author("oxore")
+        .about("MCS51 emulator")
+        .arg(
+            clap::Arg::with_name("file")
+                .short("f")
+                .long("file")
+                .value_name("FILE")
+                .help("Sets a file with program to load")
+                .takes_value(true)
+                .required(true),
+        )
+        .arg(
+            clap::Arg::with_name("interface")
+                .short("i")
+                .long("interface")
+                .value_name("INTERFACE")
+                .help("Sets a controlling and I/O interface")
+                .takes_value(true)
+                .possible_values(&["cli", "ws"]),
+        )
+        .get_matches();
+
+    let filename = cli_args_matches
+        .value_of("file")
+        .expect("No file name provided");
     let data =
-        fs::read_to_string(&args[1]).unwrap_or_else(|_| panic!("Unable to read file {}", &args[1]));
+        fs::read_to_string(filename).unwrap_or_else(|_| panic!("Unable to read file {}", filename));
 
     let asyncpair = Arc::new((Mutex::new(false), Condvar::new()));
     let asyncpair2 = asyncpair.clone();