add default value for NUM_AGENTS

src/agent.rs

@@ -47,9 +47,9 @@ impl Agent {
         if child == 0 {
             // child
 
-            close(0);
-            close(1);
-            close(2);
+            // close(0);
+            // close(1);
+            // close(2);
 
             let path = CString::new(agent_path.as_os_str().as_encoded_bytes()).unwrap();
             let data_fd = CString::new(data_fd.to_string()).unwrap();

src/ed25519.rs

@@ -13,7 +13,7 @@ static ED25519AGENT: LazyLock<Vec<Mutex<Agent>>> = LazyLock::new(|| {
     let keyfile_path =
         std::env::var("ED25519_KEYFILE").expect("Ed25519_KEYFILE environment variable missing");
     let num_agents: usize = std::env::var("NUM_AGENTS")
-        .expect("NUM_AGENTS environment variable missing")
+        .unwrap_or("1".to_string())
         .parse()
         .expect("NUM_AGENTS should be an integer");
     let mut agents = Vec::with_capacity(num_agents);