Use clap for command-line arguments in pull example

examples/pull.rs

@@ -1,21 +1,37 @@
-use std::{env, error::Error, io::Write};
+use std::{error::Error, io::Write};
 
+use clap::Parser;
 use futures_util::StreamExt;
 use ollama_rs::{OllamaClient, types::pull::PullRequest};
 
-const MODEL: &str = "functiongemma";
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    /// The model to pull
+    #[arg(short, long)]
+    model: String,
+
+    /// The Ollama server address
+    #[arg(
+        short,
+        long,
+        env = "OLLAMA_SERVER",
+        default_value = "http://localhost:11434"
+    )]
+    server_address: String,
+}
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn Error>> {
     let _ = dotenvy::dotenv();
-    let server_address = env::var("OLLAMA_SERVER")?;
-    let ollama_client = OllamaClient::new(server_address);
+    let args = Args::parse();
+    let ollama_client = OllamaClient::new(args.server_address);
 
-    let request = PullRequest::builder(MODEL).stream(true).build();
+    let request = PullRequest::builder(&args.model).stream(true).build();
     let mut stream = ollama_client.pull(request);
     while let Some(response) = stream.next().await {
         let response = response?;
-        println!("{:?}", response);
+        println!("{}", response.status);
         std::io::stdout().flush()?;
     }
     Ok(())