From 3847617f55873cfa4286e133a9e1f47623a244a5 Mon Sep 17 00:00:00 2001
From: Feng Yu <F3n67u@outlook.com>
Date: Tue, 21 Jun 2022 02:58:45 +0800
Subject: [PATCH] dns: make promise API fully constructed from
 `lib/internal/dns/promises`
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PR-URL: https://github.com/nodejs/node/pull/43227
Refs: https://github.com/nodejs/node/discussions/43198
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Minwoo Jung <nodecorelab@gmail.com>
---
 lib/dns.js                   |  2 --
 lib/dns/promises.js          |  4 +---
 lib/internal/dns/promises.js | 11 +++++++++++
 3 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/lib/dns.js b/lib/dns.js
index 351fa43f357f4d..97793eb12aaf3a 100644
--- a/lib/dns.js
+++ b/lib/dns.js
@@ -439,8 +439,6 @@ ObjectDefineProperties(module.exports, {
     get() {
       if (promises === null) {
         promises = require('internal/dns/promises');
-        promises.setServers = defaultResolverSetServers;
-        promises.setDefaultResultOrder = setDefaultResultOrder;
       }
       return promises;
     }
diff --git a/lib/dns/promises.js b/lib/dns/promises.js
index ad8a2561ef51e4..35881e5bb47374 100644
--- a/lib/dns/promises.js
+++ b/lib/dns/promises.js
@@ -1,5 +1,3 @@
 'use strict';
 
-const dnsPromises = require('internal/dns/promises');
-dnsPromises.setServers = require('dns').setServers;
-module.exports = dnsPromises;
+module.exports = require('internal/dns/promises');
diff --git a/lib/internal/dns/promises.js b/lib/internal/dns/promises.js
index 395b059758f36f..334260923faa7b 100644
--- a/lib/internal/dns/promises.js
+++ b/lib/internal/dns/promises.js
@@ -17,6 +17,8 @@ const {
   emitInvalidHostnameWarning,
   getDefaultVerbatim,
   errorCodes: dnsErrorCodes,
+  setDefaultResultOrder,
+  setDefaultResolver,
 } = require('internal/dns/utils');
 const {
   NODATA,
@@ -349,11 +351,20 @@ Resolver.prototype.resolve = function resolve(hostname, rrtype) {
   return ReflectApply(resolver, this, [hostname]);
 };
 
+function defaultResolverSetServers(servers) {
+  const resolver = new Resolver();
+
+  resolver.setServers(servers);
+  setDefaultResolver(resolver);
+  bindDefaultResolver(module.exports, Resolver.prototype);
+}
 
 module.exports = {
   lookup,
   lookupService,
   Resolver,
+  setDefaultResultOrder,
+  setServers: defaultResolverSetServers,
 
   // ERROR CODES
   NODATA,