Use clap for CLI argument parsing

3 files changed, 140 insertions, 7 deletions

diff --git a/Cargo.lock b/Cargo.lock
index 2a26673..62161f5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,115 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 [[package]]
+name = "ansi_term"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
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+ "libc 0.2.67 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "bitflags"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "clap"
+version = "2.33.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "atty 0.2.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bitflags 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-width 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
+ "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "hermit-abi"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "libc 0.2.67 (registry+https://github.com/rust-lang/crates.io-index)",
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+
+[[package]]
+name = "libc"
+version = "0.2.67"
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+
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+[[package]]
+name = "unicode-width"
+version = "0.1.7"
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+
+[[package]]
+name = "vec_map"
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+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
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+ "winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
 name = "x51emu"
 version = "0.1.0"
+dependencies = [
+ "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
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diff --git a/Cargo.toml b/Cargo.toml
index a2942d8..7bb745a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,3 +5,4 @@ authors = ["Oxore <oxore@protonmail.com>"]
 edition = "2018"
 
 [dependencies]
+clap = "2.33.0"
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();