src: add a constructor overload for CallbackScope

src/api/async_resource.cc

@@ -62,10 +62,8 @@ async_id AsyncResource::get_trigger_async_id() const {
   return async_context_.trigger_async_id;
 }
 
-// TODO(addaleax): We shouldn’t need to use env_->isolate() if we’re just going
-// to end up using the Isolate* to figure out the Environment* again.
 AsyncResource::CallbackScope::CallbackScope(AsyncResource* res)
-    : node::CallbackScope(res->env_->isolate(),
+    : node::CallbackScope(res->env_,
                           res->resource_.Get(res->env_->isolate()),
                           res->async_context_) {}
 

src/api/callback.cc

@@ -26,6 +26,16 @@ CallbackScope::CallbackScope(Isolate* isolate,
   try_catch_.SetVerbose(true);
 }
 
+CallbackScope::CallbackScope(Environment* env,
+                             Local<Object> object,
+                             async_context asyncContext)
+  : private_(new InternalCallbackScope(env,
+                                       object,
+                                       asyncContext)),
+    try_catch_(env->isolate()) {
+  try_catch_.SetVerbose(true);
+}
+
 CallbackScope::~CallbackScope() {
   if (try_catch_.HasCaught())
     private_->MarkAsFailed();

src/node.h

@@ -1005,6 +1005,9 @@ class NODE_EXTERN CallbackScope {
   CallbackScope(v8::Isolate* isolate,
                 v8::Local<v8::Object> resource,
                 async_context asyncContext);
+  CallbackScope(Environment* env,
+                v8::Local<v8::Object> resource,
+                async_context asyncContext);
   ~CallbackScope();
 
   void operator=(const CallbackScope&) = delete;

src/node_api.cc

@@ -539,7 +539,7 @@ class AsyncContext {
   class CallbackScope : public node::CallbackScope {
    public:
     explicit CallbackScope(AsyncContext* async_context)
-        : node::CallbackScope(async_context->node_env()->isolate(),
+        : node::CallbackScope(async_context->node_env(),
                               async_context->resource_.Get(
                                   async_context->node_env()->isolate()),
                               async_context->async_context()) {}