From 603e1264fcdf977816be1517b3d81a7413c19211 Mon Sep 17 00:00:00 2001
From: himself65 <himself65@outlook.com>
Date: Wed, 22 Apr 2020 13:28:35 +0800
Subject: [PATCH 1/2] module: hide internal stack when onWarning

---
 lib/internal/process/warning.js | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/internal/process/warning.js b/lib/internal/process/warning.js
index 383bbd7e0fe79f..5eafb3e65e8a77 100644
--- a/lib/internal/process/warning.js
+++ b/lib/internal/process/warning.js
@@ -58,6 +58,17 @@ function doEmitWarning(warning) {
   return () => process.emit('warning', warning);
 }
 
+function hideInternalStacks(stacks) {
+  const newStack = [];
+  for (const stack of stacks.split('\n')) {
+    if (/\(internal\/.+\)$/.test(stack)) {
+      continue;
+    }
+    newStack.push(stack);
+  }
+  return newStack.join('\n');
+}
+
 let traceWarningHelperShown = false;
 function onWarning(warning) {
   if (!(warning instanceof Error)) return;
@@ -69,7 +80,8 @@ function onWarning(warning) {
   if (warning.code)
     msg += `[${warning.code}] `;
   if (trace && warning.stack) {
-    msg += `${warning.stack}`;
+    // hide internal stack
+    msg += hideInternalStacks(`${warning.stack}`);
   } else {
     const toString =
       typeof warning.toString === 'function' ?

From 92cdf773f1cc5dbf5e9ece0eed89c60a6cf2564b Mon Sep 17 00:00:00 2001
From: himself65 <himself65@outlook.com>
Date: Wed, 22 Apr 2020 13:49:47 +0800
Subject: [PATCH 2/2] fixup!

---
 lib/internal/process/warning.js | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/lib/internal/process/warning.js b/lib/internal/process/warning.js
index 5eafb3e65e8a77..f2879ad8d4234e 100644
--- a/lib/internal/process/warning.js
+++ b/lib/internal/process/warning.js
@@ -80,8 +80,7 @@ function onWarning(warning) {
   if (warning.code)
     msg += `[${warning.code}] `;
   if (trace && warning.stack) {
-    // hide internal stack
-    msg += hideInternalStacks(`${warning.stack}`);
+    msg += `${warning.stack}`;
   } else {
     const toString =
       typeof warning.toString === 'function' ?
@@ -91,12 +90,16 @@ function onWarning(warning) {
   if (typeof warning.detail === 'string') {
     msg += `\n${warning.detail}`;
   }
-  if (!trace && !traceWarningHelperShown) {
-    const flag = isDeprecation ? '--trace-deprecation' : '--trace-warnings';
-    const argv0 = require('path').basename(process.argv0 || 'node', '.exe');
-    msg += `\n(Use \`${argv0} ${flag} ...\` to show where the warning ` +
-           'was created)';
-    traceWarningHelperShown = true;
+  if (!traceWarningHelperShown) {
+    if (!trace) {
+      const flag = isDeprecation ? '--trace-deprecation' : '--trace-warnings';
+      const argv0 = require('path').basename(process.argv0 || 'node', '.exe');
+      msg += `\n(Use \`${argv0} ${flag} ...\` to show where the warning ` +
+          'was created)';
+      traceWarningHelperShown = true;
+    } else {
+      msg = hideInternalStacks(msg);
+    }
   }
   const warningFile = lazyOption();
   if (warningFile) {