fix: expose helpers for legacy versions of Node.js (#1801)

.eslintignore

@@ -1,3 +1,4 @@
 build/
 test/
 example/
+helpers/

helpers/helpers.mjs

@@ -0,0 +1,10 @@
+import {applyExtends as _applyExtends} from '../build/lib/utils/apply-extends.js';
+import {hideBin} from '../build/lib/utils/process-argv.js';
+import Parser from 'yargs-parser';
+import shim from '../lib/platform-shims/esm.mjs';
+
+const applyExtends = (config, cwd, mergeExtends) => {
+  return _applyExtends(config, cwd, mergeExtends, shim);
+};
+
+export {applyExtends, hideBin, Parser};

helpers/index.js

@@ -0,0 +1,14 @@
+const {
+  applyExtends,
+  cjsPlatformShim,
+  Parser,
+  processArgv,
+} = require('../build/index.cjs');
+
+module.exports = {
+  applyExtends: (config, cwd, mergeExtends) => {
+    return applyExtends(config, cwd, mergeExtends, cjsPlatformShim);
+  },
+  hideBin: processArgv.hideBin,
+  Parser,
+};

helpers/package.json

@@ -0,0 +1,3 @@
+{
+  "type": "commonjs"
+}

package.json

@@ -12,8 +12,8 @@
       "./index.cjs"
     ],
     "./helpers": {
-      "import": "./helpers.mjs",
-      "require": "./yargs"
+      "import": "./helpers/helpers.mjs",
+      "require": "./helpers/index.js"
     },
     "./yargs": [
       {
@@ -33,7 +33,8 @@
   "files": [
     "browser.mjs",
     "index.cjs",
-    "helpers.mjs",
+    "helpers/*.js",
+    "helpers/*",
     "index.mjs",
     "yargs",
     "build",
@@ -99,6 +100,7 @@
   "standardx": {
     "ignore": [
       "build",
+      "helpers",
       "**/example/**",
       "**/platform-shims/esm.mjs"
     ]

test/esm/helpers.mjs

@@ -1,7 +1,7 @@
 'use strict';
 
 import * as assert from 'assert';
-import {applyExtends, hideBin, Parser} from '../../helpers.mjs';
+import {applyExtends, hideBin, Parser} from '../../helpers/helpers.mjs';
 import {describe, it} from 'mocha';
 
 describe('helpers', () => {

yargs

@@ -1,5 +1,5 @@
 // TODO: consolidate on using a helpers file at some point in the future, which
-// is the approach currently used to export Parser and  applyExtends for ESM:
+// is the approach currently used to export Parser and applyExtends for ESM:
 const {applyExtends, cjsPlatformShim, Parser, Yargs, processArgv} = require('./build/index.cjs')
 Yargs.applyExtends = (config, cwd, mergeExtends) => {
   return applyExtends(config, cwd, mergeExtends, cjsPlatformShim)