From 248921b58ca5fdff439f418f8adc8f07a9cb154c Mon Sep 17 00:00:00 2001
From: Joyee Cheung <joyeec9h3@gmail.com>
Date: Wed, 4 Dec 2019 01:11:29 +0800
Subject: [PATCH] lib: delay access to CLI option to pre-execution

CLI options should not be added through the config binding, instead
they are already available in the JS land via
`require('internal/options')`. Also CLI options in principle should
be processed in pre-execution instead of bootstrap scripts.

PR-URL: https://github.com/nodejs/node/pull/30778
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yongsheng Zhang <zyszys98@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
---
 lib/internal/bootstrap/loaders.js       |  3 ---
 lib/internal/bootstrap/pre_execution.js | 12 +++++++++++-
 lib/internal/main/worker_thread.js      |  2 ++
 src/node_config.cc                      |  8 ++++----
 4 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/lib/internal/bootstrap/loaders.js b/lib/internal/bootstrap/loaders.js
index dbf1609dbc410a..1a0db5f882fc6f 100644
--- a/lib/internal/bootstrap/loaders.js
+++ b/lib/internal/bootstrap/loaders.js
@@ -160,9 +160,6 @@ function NativeModule(id) {
   this.loaded = false;
   this.loading = false;
   this.canBeRequiredByUsers = !id.startsWith('internal/');
-
-  if (id === 'wasi')
-    this.canBeRequiredByUsers = !!internalBinding('config').experimentalWasi;
 }
 
 // To be called during pre-execution when --expose-internals is on.
diff --git a/lib/internal/bootstrap/pre_execution.js b/lib/internal/bootstrap/pre_execution.js
index e20fd10fd4d053..81002a3e3c49f6 100644
--- a/lib/internal/bootstrap/pre_execution.js
+++ b/lib/internal/bootstrap/pre_execution.js
@@ -62,6 +62,7 @@ function prepareMainThreadExecution(expandArgv1 = false) {
   initializeClusterIPC();
 
   initializeDeprecations();
+  initializeWASI();
   initializeCJSLoader();
   initializeESMLoader();
 
@@ -400,6 +401,14 @@ function initializePolicy() {
   }
 }
 
+function initializeWASI() {
+  if (getOptionValue('--experimental-wasi-unstable-preview0')) {
+    const { NativeModule } = require('internal/bootstrap/loaders');
+    const mod = NativeModule.map.get('wasi');
+    mod.canBeRequiredByUsers = true;
+  }
+}
+
 function initializeCJSLoader() {
   const CJSLoader = require('internal/modules/cjs/loader');
   CJSLoader.Module._initPaths();
@@ -466,5 +475,6 @@ module.exports = {
   setupTraceCategoryState,
   setupInspectorHooks,
   initializeReport,
-  initializeCJSLoader
+  initializeCJSLoader,
+  initializeWASI
 };
diff --git a/lib/internal/main/worker_thread.js b/lib/internal/main/worker_thread.js
index 49fad1b5c30513..56ccd9df5e9b53 100644
--- a/lib/internal/main/worker_thread.js
+++ b/lib/internal/main/worker_thread.js
@@ -14,6 +14,7 @@ const {
   setupWarningHandler,
   setupDebugEnv,
   initializeDeprecations,
+  initializeWASI,
   initializeCJSLoader,
   initializeESMLoader,
   initializeFrozenIntrinsics,
@@ -109,6 +110,7 @@ port.on('message', (message) => {
       require('internal/process/policy').setup(manifestSrc, manifestURL);
     }
     initializeDeprecations();
+    initializeWASI();
     initializeCJSLoader();
     initializeESMLoader();
 
diff --git a/src/node_config.cc b/src/node_config.cc
index 16050bdd5b967d..6ee3164a134fe8 100644
--- a/src/node_config.cc
+++ b/src/node_config.cc
@@ -15,11 +15,14 @@ using v8::Number;
 using v8::Object;
 using v8::Value;
 
-// The config binding is used to provide an internal view of compile or runtime
+// The config binding is used to provide an internal view of compile time
 // config options that are required internally by lib/*.js code. This is an
 // alternative to dropping additional properties onto the process object as
 // has been the practice previously in node.cc.
 
+// Command line arguments are already accessible in the JS land via
+// require('internal/options').getOptionValue('--some-option'). Do not add them
+// here.
 static void Initialize(Local<Object> target,
                        Local<Value> unused,
                        Local<Context> context,
@@ -84,9 +87,6 @@ static void Initialize(Local<Object> target,
 
   READONLY_PROPERTY(target, "hasCachedBuiltins",
      v8::Boolean::New(isolate, native_module::has_code_cache));
-
-  if (env->options()->experimental_wasi)
-    READONLY_TRUE_PROPERTY(target, "experimentalWasi");
 }  // InitConfig
 
 }  // namespace node