Repository: nodejs/node
Pull request: punycode: limit deprecation warning

DEP0040 is an extremely annoying warning. Most of the people seeing it cannot do anything about it. This commit updates the warning logic to only emit outside of node_modules. This is similar to other warnings such as the Buffer() constructor warning.

Ideally, this should be backported to Node 22.

Refs: https://github.com/nodejs/node/pull/47202

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Changed files:
filename: lib/punycode.js
patch: @@ -1,11 +1,16 @@
 'use strict';
-
-process.emitWarning(
-  'The `punycode` module is deprecated. Please use a userland ' +
-  'alternative instead.',
-  'DeprecationWarning',
-  'DEP0040',
-);
+const {
+  isInsideNodeModules,
+} = internalBinding('util');
+
+if (!isInsideNodeModules(100, true)) {
+	process.emitWarning(
+		'The `punycode` module is deprecated. Please use a userland ' +
+		'alternative instead.',
+		'DeprecationWarning',
+		'DEP0040',
+	);
+}
 
 /** Highest positive signed 32-bit float value */
 const maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1

filename: test/fixtures/errors/core_line_numbers.snapshot
patch: @@ -1,10 +1,10 @@
-node:punycode:49
+node:punycode:54
 	throw new RangeError(errors[type]);
 	^
 
 RangeError: Invalid input
-    at error (node:punycode:49:8)
-    at Object.decode (node:punycode:242:5)
+    at error (node:punycode:54:8)
+    at Object.decode (node:punycode:247:5)
     at Object.<anonymous> (*core_line_numbers.js:13:10)
 
 Node.js *