stream: inline name arg creation

Author: efekrskl

lib/internal/streams/pipeline.js

@@ -181,12 +181,6 @@ async function pumpToWeb(readable, writable, finish, { end }) {
   }
 }
 
-function getPipelineArgName(i, len) {
-  if (i === 0) return 'source';
-  if (i === len - 1) return 'destination';
-  return `transform[${i - 1}]`;
-}
-
 function isValidPipelineSource(stream) {
   return (
     isIterable(stream) ||
@@ -218,12 +212,10 @@ function validatePipelineStream(stream, i, len) {
     return;
   }
 
-  const name = getPipelineArgName(i, len);
-
   if (i === 0) {
     if (!isValidPipelineSource(stream)) {
       throw new ERR_INVALID_ARG_TYPE(
-        name,
+        'source',
         ['Readable', 'Iterable', 'AsyncIterable', 'ReadableStream', 'TransformStream'],
         stream,
       );
@@ -234,7 +226,7 @@ function validatePipelineStream(stream, i, len) {
   if (i === len - 1) {
     if (!isValidPipelineDestination(stream)) {
       throw new ERR_INVALID_ARG_TYPE(
-        name,
+        'destination',
         ['Writable', 'WritableStream', 'TransformStream'],
         stream,
       );
@@ -244,7 +236,7 @@ function validatePipelineStream(stream, i, len) {
 
   if (!isValidPipelineTransform(stream)) {
     throw new ERR_INVALID_ARG_TYPE(
-      name,
+      `transform[${i - 1}]`,
       ['Duplex', 'Transform', 'TransformStream'],
       stream,
     );