electron/patches/node/chore_expose_importmoduledynamically_and.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Samuel Attard <marshallofsound@electronjs.org>
Date: Wed, 8 Mar 2023 13:02:17 -0800
Subject: chore: expose ImportModuleDynamically and
 HostInitializeImportMetaObjectCallback to embedders

This also subtly changes the behavior of shouldNotRegisterESMLoader to ensure that node sets up the handlers
internally but simply avoids setting its own handlers on the Isolate.  This is so that Electron can set it to
its own blended handler between Node and Blink.

Not upstreamable.

diff --git a/lib/internal/modules/esm/utils.js b/lib/internal/modules/esm/utils.js
index 4a4279459341e87784ee8efa832dc74371c4a708..88d84786e72cf8712e0b9bda16c418d4087fe549 100644
--- a/lib/internal/modules/esm/utils.js
+++ b/lib/internal/modules/esm/utils.js
@@ -34,7 +34,7 @@ const {
   ERR_VM_DYNAMIC_IMPORT_CALLBACK_MISSING,
   ERR_INVALID_ARG_VALUE,
 } = require('internal/errors').codes;
-const { getOptionValue } = require('internal/options');
+const { getOptionValue, getEmbedderOptions } = require('internal/options');
 const {
   loadPreloadModules,
   initializeFrozenIntrinsics,
@@ -291,12 +291,13 @@ let _forceDefaultLoader = false;
  * @param {boolean} [forceDefaultLoader] - A boolean indicating disabling custom loaders.
  */
 function initializeESM(forceDefaultLoader = false) {
+  const shouldSetOnIsolate = !getEmbedderOptions().shouldNotRegisterESMLoader;
   _forceDefaultLoader = forceDefaultLoader;
   initializeDefaultConditions();
   // Setup per-realm callbacks that locate data or callbacks that we keep
   // track of for different ESM modules.
-  setInitializeImportMetaObjectCallback(initializeImportMetaObject);
-  setImportModuleDynamicallyCallback(importModuleDynamicallyCallback);
+  setInitializeImportMetaObjectCallback(initializeImportMetaObject, shouldSetOnIsolate);
+  setImportModuleDynamicallyCallback(importModuleDynamicallyCallback, shouldSetOnIsolate);
 }
 
 /**
diff --git a/src/module_wrap.cc b/src/module_wrap.cc
index 5783728da2894270f902f47b210008df0e911bde..8fed194cbae9ce75bd0805b4df30b4de64fbbefa 100644
--- a/src/module_wrap.cc
+++ b/src/module_wrap.cc
@@ -1097,7 +1097,7 @@ Maybe<ModuleWrap*> ModuleWrap::ResolveModule(
   return Just(module_wrap);
 }
 
-static MaybeLocal<Promise> ImportModuleDynamicallyWithPhase(
+MaybeLocal<Promise> ImportModuleDynamicallyWithPhase(
     Local<Context> context,
     Local<Data> host_defined_options,
     Local<Value> resource_name,
@@ -1185,14 +1185,16 @@ void ModuleWrap::SetImportModuleDynamicallyCallback(
   Realm* realm = Realm::GetCurrent(args);
   HandleScope handle_scope(isolate);
 
-  CHECK_EQ(args.Length(), 1);
+  CHECK_EQ(args.Length(), 2);
   CHECK(args[0]->IsFunction());
   Local<Function> import_callback = args[0].As<Function>();
   realm->set_host_import_module_dynamically_callback(import_callback);
 
-  isolate->SetHostImportModuleDynamicallyCallback(ImportModuleDynamically);
-  isolate->SetHostImportModuleWithPhaseDynamicallyCallback(
+  if (args[1]->IsBoolean() && args[1]->BooleanValue(isolate)) {
+    isolate->SetHostImportModuleDynamicallyCallback(ImportModuleDynamically);
+    isolate->SetHostImportModuleWithPhaseDynamicallyCallback(
       ImportModuleDynamicallyWithPhase);
+  }
 }
 
 void ModuleWrap::HostInitializeImportMetaObjectCallback(
@@ -1234,13 +1236,14 @@ void ModuleWrap::SetInitializeImportMetaObjectCallback(
   Realm* realm = Realm::GetCurrent(args);
   Isolate* isolate = realm->isolate();
 
-  CHECK_EQ(args.Length(), 1);
+  CHECK_EQ(args.Length(), 2);
   CHECK(args[0]->IsFunction());
   Local<Function> import_meta_callback = args[0].As<Function>();
   realm->set_host_initialize_import_meta_object_callback(import_meta_callback);
 
-  isolate->SetHostInitializeImportMetaObjectCallback(
-      HostInitializeImportMetaObjectCallback);
+  if (args[1]->IsBoolean() && args[1]->BooleanValue(isolate))
+    isolate->SetHostInitializeImportMetaObjectCallback(
+        HostInitializeImportMetaObjectCallback);
 }
 
 MaybeLocal<Value> ModuleWrap::SyntheticModuleEvaluationStepsCallback(
diff --git a/src/module_wrap.h b/src/module_wrap.h
index 03cf8d0e91d795aad6db9b11956d296ff4999f7e..45264c2ad58e37a73fd62addac7fb671eed6d502 100644
--- a/src/module_wrap.h
+++ b/src/module_wrap.h
@@ -8,6 +8,7 @@
 #include <unordered_map>
 #include <vector>
 #include "base_object.h"
+#include "node.h"
 #include "v8-script.h"
 
 namespace node {
@@ -92,7 +93,15 @@ struct ModuleCacheKey : public MemoryRetainer {
         hash(hash) {}
 };
 
-class ModuleWrap : public BaseObject {
+NODE_EXTERN v8::MaybeLocal<v8::Promise> ImportModuleDynamicallyWithPhase(
+    v8::Local<v8::Context> context,
+    v8::Local<v8::Data> host_defined_options,
+    v8::Local<v8::Value> resource_name,
+    v8::Local<v8::String> specifier,
+    v8::ModuleImportPhase phase,
+    v8::Local<v8::FixedArray> import_attributes);
+
+class NODE_EXTERN ModuleWrap : public BaseObject {
   using ResolveCache =
       std::unordered_map<ModuleCacheKey, uint32_t, ModuleCacheKey::Hash>;
 
@@ -157,6 +166,8 @@ class ModuleWrap : public BaseObject {
   static void CreateRequiredModuleFacade(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 
+  static ModuleWrap* GetFromModule(node::Environment*, v8::Local<v8::Module>);
+
  private:
   ModuleWrap(Realm* realm,
              v8::Local<v8::Object> object,
@@ -205,7 +216,6 @@ class ModuleWrap : public BaseObject {
       v8::Local<v8::String> specifier,
       v8::Local<v8::FixedArray> import_attributes,
       v8::Local<v8::Module> referrer);
-  static ModuleWrap* GetFromModule(node::Environment*, v8::Local<v8::Module>);
 
   // This method may throw a JavaScript exception, so the return type is
   // wrapped in a Maybe.