Use native ESM for dev scripts

.eslintrc.js → .eslintrc.cjs

@@ -5,11 +5,21 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-const {getPackages} = require('./scripts/buildUtils');
+const fs = require('fs');
+const path = require('path');
+const {sync: readPkg} = require('read-pkg');
 
-const internalPackages = getPackages()
-  .map(({pkg}) => pkg.name)
-  .sort();
+function getPackages() {
+  const PACKAGES_DIR = path.resolve(__dirname, 'packages');
+  const packages = fs
+    .readdirSync(PACKAGES_DIR)
+    .map(file => path.resolve(PACKAGES_DIR, file))
+    .filter(f => fs.lstatSync(path.resolve(f)).isDirectory());
+  return packages.map(packageDir => {
+    const pkg = readPkg({cwd: packageDir});
+    return pkg.name;
+  });
+}
 
 module.exports = {
   env: {
@@ -254,7 +264,7 @@ module.exports = {
     },
     {
       env: {node: true},
-      files: ['*.js', '*.jsx'],
+      files: ['*.js', '*.jsx', '*.mjs', '*.cjs'],
     },
     {
       files: [
@@ -325,7 +335,7 @@ module.exports = {
           'scripts/**',
           'babel.config.js',
           'testSetupFile.js',
-          '.eslintrc.js',
+          '.eslintrc.cjs',
         ],
       },
     ],
@@ -507,7 +517,9 @@ module.exports = {
     'import/ignore': ['react-native'],
     // using `new RegExp` makes sure to escape `/`
     'import/internal-regex': new RegExp(
-      internalPackages.map(pkg => `^${pkg}$`).join('|'),
+      getPackages()
+        .map(pkg => `^${pkg}$`)
+        .join('|'),
     ).source,
     'import/resolver': {
       typescript: {},

.github/workflows/nodejs.yml

@@ -177,7 +177,7 @@ jobs:
           yarn jest-coverage --color --config jest.config.ci.js --max-workers ${{ steps.cpu-cores.outputs.count }} --shard=${{ matrix.shard }}
           yarn test-leak
       - name: map coverage
-        run: node ./scripts/mapCoverage.js
+        run: node ./scripts/mapCoverage.mjs
         if: always()
       - uses: codecov/codecov-action@v2
         if: always()

e2e/watch-plugins/cjs/my-watch-plugin.cjs

@@ -6,17 +6,15 @@
  */
 class MyWatchPlugin {
   // Add hooks to Jest lifecycle events
-  apply(jestHooks) {
-  }
+  apply(jestHooks) {}
 
   // Get the prompt information for interactive plugins
   getUsageInfo(globalConfig) {
     console.log('getUsageInfo');
   }
 
   // Executed when the key from `getUsageInfo` is input
-  run(globalConfig, updateConfigAndRun) {
-  }
+  run(globalConfig, updateConfigAndRun) {}
 }
 
 module.exports = MyWatchPlugin;

e2e/watch-plugins/mjs/my-watch-plugin.mjs

@@ -6,17 +6,15 @@
  */
 class MyWatchPlugin {
   // Add hooks to Jest lifecycle events
-  apply(jestHooks) {
-  }
+  apply(jestHooks) {}
 
   // Get the prompt information for interactive plugins
   getUsageInfo(globalConfig) {
     console.log('getUsageInfo');
   }
 
   // Executed when the key from `getUsageInfo` is input
-  run(globalConfig, updateConfigAndRun) {
-  }
+  run(globalConfig, updateConfigAndRun) {}
 }
 
 export default MyWatchPlugin;

package.json

@@ -87,31 +87,31 @@
   "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",
-    "check-copyright-headers": "node ./scripts/checkCopyrightHeaders.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.mjs",
     "clean-all": "yarn clean-e2e && yarn build-clean && rimraf './packages/*/node_modules' && rimraf './node_modules'",
-    "clean-e2e": "node ./scripts/cleanE2e.js",
+    "clean-e2e": "node ./scripts/cleanE2e.mjs",
     "crowdin:upload": "echo 'Uploading sources to Crowdin' && crowdin upload sources --config ./crowdin.yaml",
     "crowdin:download": "echo 'Downloading translations from Crowdin' && crowdin download --config ./crowdin.yaml",
     "jest": "node ./packages/jest-cli/bin/jest.js",
     "jest-jasmine": "JEST_JASMINE=1 yarn jest",
     "jest-jasmine-ci": "yarn jest-jasmine --color --config jest.config.ci.js",
     "jest-coverage": "yarn jest --coverage",
-    "lint": "eslint . --cache --ext js,jsx,ts,tsx,md",
+    "lint": "eslint . --cache --ext js,jsx,cjs,mjs,ts,tsx,md",
     "lint:prettier": "prettier '**/*.{json,md,yml,yaml}' 'website/**/*.{css,js}' --write",
     "lint:prettier:ci": "prettier '**/*.{json,md,yml,yaml}' 'website/**/*.{css,js}' --check",
-    "remove-examples": "node ./scripts/remove-examples.js",
+    "remove-examples": "node ./scripts/remove-examples.mjs",
     "test-types": "yarn jest --config jest.config.tsd.js",
     "test-ci-partial": "yarn test-ci-partial:parallel -i",
     "test-ci-partial:parallel": "yarn jest --color --config jest.config.ci.js",
     "test-pretty-format-perf": "node packages/pretty-format/perf/test.js",
     "test-leak": "yarn jest -i --detectLeaks --color jest-mock jest-diff jest-repl pretty-format",
     "test": "yarn lint && yarn jest",
-    "verify-old-ts": "node ./scripts/verifyOldTs.js",
-    "verify-pnp": "node ./scripts/verifyPnP.js",
-    "watch": "yarn build:js && node ./scripts/watch.js",
+    "verify-old-ts": "node ./scripts/verifyOldTs.mjs",
+    "verify-pnp": "node ./scripts/verifyPnP.mjs",
+    "watch": "yarn build:js && node ./scripts/watch.mjs",
     "watch:ts": "yarn build:ts --watch"
   },
   "workspaces": [

scripts/build.js → scripts/build.mjs

@@ -12,36 +12,39 @@
  * 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 path from 'path';
+import {fileURLToPath} from 'url';
+import babel from '@babel/core';
+import chalk from 'chalk';
+import glob from 'glob';
+import fs from 'graceful-fs';
+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 +113,10 @@ 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

@@ -5,18 +5,16 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-'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');
+import assert from 'assert';
+import os from 'os';
+import path from 'path';
+import chalk from 'chalk';
+import execa from 'execa';
+import globby from 'globby';
+import fs from 'graceful-fs';
+import stripJsonComments from 'strip-json-comments';
+import throat from 'throat';
+import {getPackages} from './buildUtils.mjs';
 
 (async () => {
   const packages = getPackages();

scripts/buildUtils.js → scripts/buildUtils.mjs

@@ -5,26 +5,30 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-'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 {createRequire} from 'module';
+import path from 'path';
+import {fileURLToPath} from 'url';
+import chalk from 'chalk';
+import fs from 'graceful-fs';
+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 +108,9 @@ 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 +119,4 @@ 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

@@ -5,25 +5,26 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-'use strict';
-
-const fs = require('fs');
-const path = require('path');
-const {
+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 fs from 'graceful-fs';
+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 = `
@@ -104,7 +105,10 @@ 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),
   );
 

scripts/checkCopyrightHeaders.js → scripts/checkCopyrightHeaders.mjs

@@ -5,11 +5,9 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-'use strict';
-
-const {execSync} = require('child_process');
-const fs = require('fs');
-const {isBinaryFileSync} = require('isbinaryfile');
+import {execSync} from 'child_process';
+import fs from 'graceful-fs';
+import {isBinaryFileSync} from 'isbinaryfile';
 
 const getFileContents = path => fs.readFileSync(path, {encoding: 'utf-8'});
 const isDirectory = path => fs.lstatSync(path).isDirectory();
@@ -149,7 +147,7 @@ function check() {
 
   ${invalidFiles.join('\n  ')}
 
-Please include the header or exclude the files in \`scripts/checkCopyrightHeaders.js\``);
+Please include the header or exclude the files in \`scripts/checkCopyrightHeaders.mjs\``);
     process.exit(1);
   }
 }