Backport #30742

Update to `@rollup/plugin-babel`

build/babel-helpers.js

@@ -1,13 +0,0 @@
-'use strict'
-
-// These are the babel helpers we whitelist
-const helpers = [
-  'createClass',
-  'createSuper',
-  'defineProperties',
-  'defineProperty',
-  'inheritsLoose',
-  'objectSpread2'
-]
-
-module.exports = helpers

build/build-plugins.js

@@ -11,17 +11,16 @@
 
 const path = require('path')
 const rollup = require('rollup')
-const babel   = require('rollup-plugin-babel')
+const { babel } = require('@rollup/plugin-babel')
 const banner = require('./banner.js')
-const babelHelpers = require('./babel-helpers.js')
 
 const TEST = process.env.NODE_ENV === 'test'
 const plugins = [
   babel({
     // Only transpile our source code
     exclude: 'node_modules/**',
-    // Include only required helpers
-    externalHelpersWhitelist: babelHelpers
+    // Inline the required helpers in each file
+    babelHelpers: 'inline'
   })
 ]
 const bsPlugins = {

build/rollup.config.js

@@ -1,10 +1,9 @@
 'use strict'
 
 const path = require('path')
-const babel   = require('rollup-plugin-babel')
+const { babel } = require('@rollup/plugin-babel')
 const resolve = require('@rollup/plugin-node-resolve')
 const banner = require('./banner.js')
-const babelHelpers = require('./babel-helpers.js')
 
 const BUNDLE = process.env.BUNDLE === 'true'
 
@@ -14,8 +13,8 @@ const plugins = [
   babel({
     // Only transpile our source code
     exclude: 'node_modules/**',
-    // Include only required helpers
-    externalHelpersWhitelist: babelHelpers
+    // Include the helpers in the bundle, at most one copy of each
+    babelHelpers: 'bundled'
   })
 ]
 const globals = {

js/tests/integration/rollup.bundle.js

@@ -2,7 +2,7 @@
 
 const resolve = require('@rollup/plugin-node-resolve')
 const commonjs = require('@rollup/plugin-commonjs')
-const babel = require('rollup-plugin-babel')
+const { babel } = require('@rollup/plugin-babel')
 
 module.exports = {
   input: 'js/tests/integration/bundle.js',
@@ -14,7 +14,8 @@ module.exports = {
     resolve(),
     commonjs(),
     babel({
-      exclude: 'node_modules/**'
+      exclude: 'node_modules/**',
+      babelHelpers: 'bundled'
     })
   ]
 }

package-lock.json

@@ -1054,6 +1054,16 @@
         "fastq": "^1.6.0"
       }
     },
+    "@rollup/plugin-babel": {
+      "version": "5.0.2",
+      "resolved": "https://registry.npmjs.org/@rollup/plugin-babel/-/plugin-babel-5.0.2.tgz",
+      "integrity": "sha512-GiL7jL+FGppzQ1Sn4y2ER4UYXlgXFFEt+sHm4WJEzQwI76Yf9oy2QDqIvcon6xApZWlik3L8fezRGC6Mj2vRXg==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-module-imports": "^7.7.4",
+        "@rollup/pluginutils": "^3.0.8"
+      }
+    },
     "@rollup/plugin-commonjs": {
       "version": "11.1.0",
       "resolved": "https://registry.npmjs.org/@rollup/plugin-commonjs/-/plugin-commonjs-11.1.0.tgz",
@@ -8411,33 +8421,6 @@
         }
       }
     },
-    "rollup-plugin-babel": {
-      "version": "4.4.0",
-      "resolved": "https://registry.npmjs.org/rollup-plugin-babel/-/rollup-plugin-babel-4.4.0.tgz",
-      "integrity": "sha512-Lek/TYp1+7g7I+uMfJnnSJ7YWoD58ajo6Oarhlex7lvUce+RCKRuGRSgztDO3/MF/PuGKmUL5iTHKf208UNszw==",
-      "dev": true,
-      "requires": {
-        "@babel/helper-module-imports": "^7.0.0",
-        "rollup-pluginutils": "^2.8.1"
-      }
-    },
-    "rollup-pluginutils": {
-      "version": "2.8.2",
-      "resolved": "https://registry.npmjs.org/rollup-pluginutils/-/rollup-pluginutils-2.8.2.tgz",
-      "integrity": "sha512-EEp9NhnUkwY8aif6bxgovPHMoMoNr2FulJziTndpt5H9RdwC47GSGuII9XxpSdzVGM0GWrNPHV6ie1LTNJPaLQ==",
-      "dev": true,
-      "requires": {
-        "estree-walker": "^0.6.1"
-      },
-      "dependencies": {
-        "estree-walker": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/estree-walker/-/estree-walker-0.6.1.tgz",
-          "integrity": "sha512-SqmZANLWS0mnatqbSfRP5g8OXZC12Fgg1IwNtLsyHDzJizORW4khDfjPqJZsemPWBB2uqykUah5YpQ6epsqC/w==",
-          "dev": true
-        }
-      }
-    },
     "run-async": {
       "version": "2.4.1",
       "resolved": "https://registry.npmjs.org/run-async/-/run-async-2.4.1.tgz",

package.json

@@ -113,6 +113,7 @@
     "@babel/core": "^7.9.6",
     "@babel/plugin-proposal-object-rest-spread": "^7.9.6",
     "@babel/preset-env": "^7.9.6",
+    "@rollup/plugin-babel": "^5.0.2",
     "@rollup/plugin-commonjs": "^11.1.0",
     "@rollup/plugin-node-resolve": "^7.1.3",
     "autoprefixer": "^9.7.6",
@@ -144,7 +145,6 @@
     "postcss-cli": "^7.1.1",
     "qunit": "2.9.2",
     "rollup": "^2.9.1",
-    "rollup-plugin-babel": "^4.4.0",
     "shelljs": "^0.8.4",
     "shx": "^0.3.2",
     "sinon": "^7.5.0",