Use native ESM for dev scripts

.eslintrc.js

@@ -254,7 +254,7 @@ module.exports = {
     },
     {
       env: {node: true},
-      files: ['*.js', '*.jsx'],
+      files: ['*.js', '*.jsx', 'scripts/*'],
     },
     {
       files: [

package.json

@@ -87,9 +87,9 @@
   "scripts": {
     "build-clean": "rimraf './packages/*/build' './packages/*/dist' './packages/*/tsconfig.tsbuildinfo' './packages/*/api-extractor.json' './api-extractor.json'",
     "build": "yarn build:js && yarn build:ts && yarn bundle:ts",
-    "build:js": "node ./scripts/build.js",
-    "build:ts": "node ./scripts/buildTs.js",
-    "bundle:ts": "node ./scripts/bundleTs.js",
+    "build:js": "node ./scripts/build.mjs",
+    "build:ts": "node ./scripts/buildTs.mjs",
+    "bundle:ts": "node ./scripts/bundleTs.mjs",
     "check-copyright-headers": "node ./scripts/checkCopyrightHeaders.js",
     "clean-all": "yarn clean-e2e && yarn build-clean && rimraf './packages/*/node_modules' && rimraf './node_modules'",
     "clean-e2e": "node ./scripts/cleanE2e.js",

scripts/build.js → scripts/build.mjs

@@ -12,36 +12,41 @@
  * Non-js files not matching IGNORE_PATTERN will be copied without transpiling.
  *
  * Example:
- *  node ./scripts/build.js
- *  node ./scripts/build.js /users/123/jest/packages/jest-111/src/111.js
- *
- * NOTE: this script is node@6 compatible
+ *  node ./scripts/build.mjs
+ *  node ./scripts/build.mjs /users/123/jest/packages/jest-111/src/111.js
  */
 
 'use strict';
 
-const assert = require('assert');
-const fs = require('fs');
-const path = require('path');
-const babel = require('@babel/core');
-const chalk = require('chalk');
-const glob = require('glob');
-const micromatch = require('micromatch');
-const prettier = require('prettier');
-const transformOptions = require('../babel.config.js');
-const {getPackages, adjustToTerminalWidth, OK} = require('./buildUtils');
+import assert from 'assert';
+import fs from 'fs';
+import path from 'path';
+import {fileURLToPath} from 'url';
+import babel from '@babel/core';
+import chalk from 'chalk';
+import glob from 'glob';
+import micromatch from 'micromatch';
+import prettier from 'prettier';
+import transformOptions from '../babel.config.js';
+import {
+  OK,
+  PACKAGES_DIR,
+  adjustToTerminalWidth,
+  getPackages,
+} from './buildUtils.mjs';
 
 const SRC_DIR = 'src';
 const BUILD_DIR = 'build';
 const JS_FILES_PATTERN = '**/*.js';
 const TS_FILES_PATTERN = '**/*.ts';
 const IGNORE_PATTERN = '**/__{tests,mocks}__/**';
-const PACKAGES_DIR = path.resolve(__dirname, '../packages');
 
 const INLINE_REQUIRE_EXCLUDE_LIST =
   /packages\/expect|(jest-(circus|diff|get-type|jasmine2|matcher-utils|message-util|regex-util|snapshot))|pretty-format\//;
 
-const prettierConfig = prettier.resolveConfig.sync(__filename);
+const prettierConfig = prettier.resolveConfig.sync(
+  fileURLToPath(import.meta.url),
+);
 prettierConfig.trailingComma = 'none';
 prettierConfig.parser = 'babel';
 
@@ -110,7 +115,10 @@ function buildFile(file, silent) {
       // The excluded modules are injected into the user's sandbox
       // We need to guard some globals there.
       options.plugins.push(
-        require.resolve('./babel-plugin-jest-native-globals'),
+        path.resolve(
+          path.dirname(fileURLToPath(import.meta.url)),
+          'babel-plugin-jest-native-globals.js',
+        ),
       );
     } else {
       options.plugins = options.plugins.map(plugin => {

scripts/buildTs.js → scripts/buildTs.mjs

@@ -7,18 +7,18 @@
 
 'use strict';
 
-const assert = require('assert');
-const fs = require('fs');
-const os = require('os');
-const path = require('path');
-const chalk = require('chalk');
-const execa = require('execa');
-const globby = require('globby');
-const stripJsonComments = require('strip-json-comments');
-const throat = require('throat');
-const {getPackages} = require('./buildUtils');
-
-(async () => {
+import assert from 'assert';
+import fs from 'fs';
+import os from 'os';
+import path from 'path';
+import chalk from 'chalk';
+import execa from 'execa';
+import globby from 'globby';
+import stripJsonComments from 'strip-json-comments';
+import throat from 'throat';
+import {getPackages} from './buildUtils.mjs';
+
+try {
   const packages = getPackages();
 
   const packagesWithTs = packages.filter(p =>
@@ -196,7 +196,7 @@ const {getPackages} = require('./buildUtils');
   console.log(
     chalk.inverse.green(' Successfully validated TypeScript definition files '),
   );
-})().catch(error => {
+} catch (error) {
   console.error('Got error', error.stack);
   process.exitCode = 1;
-});
+}

scripts/buildUtils.js → scripts/buildUtils.mjs

@@ -7,24 +7,30 @@
 
 'use strict';
 
-const assert = require('assert');
-const fs = require('fs');
-const path = require('path');
-const chalk = require('chalk');
-const {sync: readPkg} = require('read-pkg');
-const stringLength = require('string-length');
-const rootPackage = require('../package.json');
-
-const PACKAGES_DIR = path.resolve(__dirname, '../packages');
-
-const OK = chalk.reset.inverse.bold.green(' DONE ');
+import assert from 'assert';
+import fs from 'fs';
+import {createRequire} from 'module';
+import path from 'path';
+import {fileURLToPath} from 'url';
+import chalk from 'chalk';
+import {sync as readPkg} from 'read-pkg';
+import stringLength from 'string-length';
+
+export const PACKAGES_DIR = path.resolve(
+  path.dirname(fileURLToPath(import.meta.url)),
+  '../packages',
+);
+
+export const OK = chalk.reset.inverse.bold.green(' DONE ');
 
 // Get absolute paths of all directories under packages/*
-module.exports.getPackages = function getPackages() {
+export function getPackages() {
   const packages = fs
     .readdirSync(PACKAGES_DIR)
     .map(file => path.resolve(PACKAGES_DIR, file))
     .filter(f => fs.lstatSync(path.resolve(f)).isDirectory());
+  const require = createRequire(import.meta.url);
+  const rootPackage = require('../package.json');
 
   const nodeEngineRequirement = rootPackage.engines.node;
 
@@ -104,9 +110,9 @@ module.exports.getPackages = function getPackages() {
 
     return {packageDir, pkg};
   });
-};
+}
 
-module.exports.adjustToTerminalWidth = function adjustToTerminalWidth(str) {
+export function adjustToTerminalWidth(str) {
   const columns = process.stdout.columns || 80;
   const WIDTH = columns - stringLength(OK) + 1;
   const strs = str.match(new RegExp(`(.{1,${WIDTH}})`, 'g'));
@@ -115,7 +121,4 @@ module.exports.adjustToTerminalWidth = function adjustToTerminalWidth(str) {
     lastString += Array(WIDTH - lastString.length).join(chalk.dim('.'));
   }
   return strs.slice(0, -1).concat(lastString).join('\n');
-};
-
-module.exports.OK = OK;
-module.exports.PACKAGES_DIR = PACKAGES_DIR;
+}

scripts/bundleTs.js → scripts/bundleTs.mjs

@@ -7,23 +7,26 @@
 
 'use strict';
 
-const fs = require('fs');
-const path = require('path');
-const {
+import fs from 'fs';
+import {createRequire} from 'module';
+import path from 'path';
+import {fileURLToPath} from 'url';
+import {
   CompilerState,
   Extractor,
   ExtractorConfig,
-} = require('@microsoft/api-extractor');
-const chalk = require('chalk');
-const {sync: pkgDir} = require('pkg-dir');
-const prettier = require('prettier');
-const rimraf = require('rimraf');
-const {getPackages} = require('./buildUtils');
+} from '@microsoft/api-extractor';
+import chalk from 'chalk';
+import {sync as pkgDir} from 'pkg-dir';
+import prettier from 'prettier';
+import rimraf from 'rimraf';
+import {getPackages} from './buildUtils.mjs';
 
 const prettierConfig = prettier.resolveConfig.sync(
-  __filename.replace(/\.js$/, '.d.ts'),
+  fileURLToPath(import.meta.url).replace(/\.js$/, '.d.ts'),
 );
 
+const require = createRequire(import.meta.url);
 const typescriptCompilerFolder = pkgDir(require.resolve('typescript'));
 
 const copyrightSnippet = `
@@ -35,7 +38,7 @@ const copyrightSnippet = `
  */
 `.trim();
 
-(async () => {
+try {
   const packages = getPackages();
 
   const packagesWithTs = packages.filter(p =>
@@ -104,7 +107,10 @@ const copyrightSnippet = `
   };
 
   await fs.promises.writeFile(
-    path.resolve(__dirname, '../api-extractor.json'),
+    path.resolve(
+      path.dirname(fileURLToPath(import.meta.url)),
+      '../api-extractor.json',
+    ),
     JSON.stringify(sharedExtractorConfig, null, 2),
   );
 
@@ -195,7 +201,7 @@ const copyrightSnippet = `
   console.log(
     chalk.inverse.green(' Successfully extracted TypeScript definition files '),
   );
-})().catch(error => {
+} catch (error) {
   console.error('Got error', error.stack);
   process.exitCode = 1;
-});
+}