added more graceful interrupt handler

src/main.rs

@@ -47,7 +47,12 @@ async fn main() -> eyre::Result<()> {
 				  .wrap_err(eyre!("Invalid config"))
 				  .with_suggestion(|| "Try running `--help`")?);
     
-    let graph = work::work_on_all(state).await;
+    let graph = tokio::select!{
+	x = work::work_on_all(state) => {x}
+	_ = tokio::signal::ctrl_c() => {
+	    return Err(eyre!("Interrupt signalled, exiting"));
+	}
+    };
     let mut graph = graph.into_hierarchical();
     graph.compute_recursive_sizes();