feat: multi-threading secret lookups

src/main.rs

@@ -4,6 +4,7 @@ use clap::Parser;
 use futures::stream::StreamExt;
 use std::fs::File;
 use std::io::Write;
+use tokio::sync::mpsc;
 
 #[derive(Parser)]
 #[clap(author, version, about, long_about = None)]
@@ -46,15 +47,42 @@ async fn fetch_secrets_from_key_vault(
 
     while let Some(page) = secret_pages.next().await {
         let page = page?;
+        let (tx, mut rx) = mpsc::channel(32); // Channel for concurrent secret retrieval
+
         for secret in &page.value {
             if let Some(filter) = filter {
                 if !secret.id.contains(filter) {
                     continue;
                 }
             }
-            let secret_name = secret.id.split('/').last().unwrap_or_default();
+            let tx = tx.clone();
-            let secret_bundle = client.get(secret_name).await?;
+
-            secret_values.push((secret.id.clone(), secret_bundle.value));
+            // Clone necessary data before moving into the spawned task
+            let secret_id = secret.id.clone();
+            let client_clone = client.clone();
+
+            tokio::spawn(async move {
+                let secret_name = secret_id.split('/').last().unwrap_or_default();
+                let secret_bundle = client_clone.get(secret_name).await;
+
+                // Handle the result and send it through the channel
+                match secret_bundle {
+                    Ok(bundle) => {
+                        tx.send((secret_id, bundle.value)).await.expect("Send error");
+                    }
+                    Err(err) => {
+                        eprintln!("Error fetching secret: {}", err);
+                        // You can decide to continue or not in case of an error.
+                    }
+                }
+            });
+        }
+
+        drop(tx); // Drop the sender to signal the end of sending tasks
+
+        while let Some(result) = rx.recv().await {
+            let (key, value) = result;
+            secret_values.push((key, value));
         }
     }