v 0.1.1

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "qr"
-version = "0.1.0"
+version = "0.1.1"
 authors = ["Hatter Jiang <jht5945@gmail.com>"]
 edition = "2018"
 readme = "README.md"
@@ -11,3 +11,4 @@ license = "MIT"
 
 [dependencies]
 qrcode = { version = "0.11.2", default-features = false }
+clap = "2.33.0"

README.md

@@ -1,3 +1,11 @@
 # qr
 
-qr
+```
+cargo install qr
+```
+
+
+```
+qr 'hello world'
+```
+

src/main.rs

@@ -1,10 +1,33 @@
+use clap::{Arg, App};
 use qrcode::QrCode;
 
 const W: &str = " ";
 const B: &str = " ";
 
-fn main() {
+fn main() -> Result<(), Box<dyn std::error::Error>> {
-    let code = QrCode::new(b"https://hatter.ink/").unwrap();
+    let matches = App::new("QR cli")
+                    .version("0.1.1")
+                    .author("Hatter Jiang <jht5945@gmail.com>")
+                    .about("QR command line tool")
+                    .arg(Arg::with_name("INPUT")
+                        .help("Set the QR input")
+                        .required(true)
+                        .index(1))
+                    .get_matches();
+
+    let mut input: Option<String> = None;
+    if let Some(input_arg) = matches.args.get("INPUT") {
+        if input_arg.vals.len() > 0 {
+            input = input_arg.vals[0].clone().into_string().ok();
+        }
+    }
+
+    let input_string = match input {
+        Some(i) => i,
+        None => return Ok(()), // TODO
+    };
+
+    let code = QrCode::new(input_string.as_bytes()).unwrap();
     let string = code.render::<char>()
         .quiet_zone(false)
         .module_dimensions(2, 1)
@@ -40,4 +63,6 @@ fn main() {
         output_stirng.push_str(W);
     }
     println!("{}", output_stirng);
+
+    Ok(())
 }