idna: use url module instead of punycode

doc/api/intl.md

@@ -51,6 +51,7 @@ option:
 | `String.prototype.toLocale*Case()`      | partial (not locale-aware)        | full                         | full                   | full       |
 | [`Number.prototype.toLocaleString()`][] | partial (not locale-aware)        | partial/full (depends on OS) | partial (English-only) | full       |
 | `Date.prototype.toLocale*String()`      | partial (not locale-aware)        | partial/full (depends on OS) | partial (English-only) | full       |
+| [Legacy URL Parser][]                   | partial (no IDN support)          | full                         | full                   | full       |
 | [WHATWG URL Parser][]                   | partial (no IDN support)          | full                         | full                   | full       |
 | [`require('buffer').transcode()`][]     | none (function does not exist)    | full                         | full                   | full       |
 | [REPL][]                                | partial (inaccurate line editing) | full                         | full                   | full       |
@@ -193,6 +194,7 @@ to be helpful:
 [ECMA-262]: https://tc39.github.io/ecma262/
 [ECMA-402]: https://tc39.github.io/ecma402/
 [ICU]: http://site.icu-project.org/
+[Legacy URL parser]: url.md#url_legacy_url_api
 [REPL]: repl.md#repl_repl
 [Test262]: https://github.com/tc39/test262/tree/HEAD/test/intl402
 [WHATWG URL parser]: url.md#url_the_whatwg_url_api

lib/internal/idna.js

@@ -4,6 +4,6 @@ if (internalBinding('config').hasIntl) {
   const { toASCII, toUnicode } = internalBinding('icu');
   module.exports = { toASCII, toUnicode };
 } else {
-  const { toASCII, toUnicode } = require('punycode');
-  module.exports = { toASCII, toUnicode };
+  const { domainToASCII, domainToUnicode } = require('internal/url');
+  module.exports = { toASCII: domainToASCII, toUnicode: domainToUnicode };
 }

test/parallel/test-bootstrap-modules.js

@@ -151,7 +151,7 @@ if (!common.isMainThread) {
 if (common.hasIntl) {
   expectedModules.add('Internal Binding icu');
 } else {
-  expectedModules.add('NativeModule punycode');
+  expectedModules.add('NativeModule url');
 }
 
 if (process.features.inspector) {

test/parallel/test-url-format.js

@@ -1,8 +1,11 @@
 'use strict';
-require('../common');
+const common = require('../common');
 const assert = require('assert');
 const url = require('url');
 
+if (!common.hasIntl)
+  common.skip('missing Intl');
+
 // Formatting tests to verify that it'll format slightly wonky content to a
 // valid URL.
 const formatTests = {

test/parallel/test-url-parse-format.js

@@ -1,5 +1,9 @@
 'use strict';
-require('../common');
+const common = require('../common');
+
+if (!common.hasIntl)
+  common.skip('missing Intl');
+
 const assert = require('assert');
 const inspect = require('util').inspect;