follwing rust tutorial

Cargo.toml

@@ -7,3 +7,4 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+clap = { version = "4.0", features = ["derive"] }

src/main.rs

@@ -1,3 +1,19 @@
-fn main() {
-    println!("Hello, world!");
+#![allow(unused)]
+use clap::Parser;
+
+/// Search for a pattern in a file and display the lines that contain it.
+#[derive(Parser)]
+
+struct Cli {
+    pattern: String,
+    path: std::path::PathBuf,
+}
+
+fn main() {
+    let args = Cli::parse();
+    println!("pattern: {}", args.pattern);
+    println!(
+        "path: {}",
+        args.path.into_os_string().into_string().unwrap()
+    );
 }