fix: transactions execution failure should lead to json "succes: false"

Author: Klaim

libmamba/src/core/transaction.cpp

@@ -368,6 +368,16 @@ namespace mamba
     bool
     MTransaction::execute(const Context& ctx, ChannelContext& channel_context, PrefixData& prefix)
     {
+        on_scope_exit _fail_json_if_exception{
+            []
+            {
+                if (std::uncaught_exceptions() > 0)
+                {
+                    Console::instance().json_write({ { "success", false } });
+                }
+            }
+        };
+
         // JSON output
         // back to the top level if any action was required
         if (!empty())