feat: opt card logging

src/pgpcardutil.rs

@@ -35,9 +35,13 @@ fn get_card() -> XResult<OpenPGPCard> {
     if card_list.is_empty() {
         return simple_error!("Cannot find any card");
     }
-    if card_list.len() > 0 {
+    if card_list.len() > 1 {
         warning!("Find {} OpenPGP cards, will use first card", card_list.len());
     }
-    Ok(opt_value_result!(card_list.into_iter().next(), "Get first card failed"))
+    let card = card_list.into_iter().next();
+    card.as_ref().map(|card|
+        card.get_aid().map(|card|
+            success!("Found card: {:?}", card)));
+    Ok(opt_value_result!(card, "Get first card failed"))
 }