Build CJS files via Rollup

See https://rollupjs.org/

lib/__tests__/writeOutputFile.test.mjs

@@ -2,7 +2,7 @@ import { fileURLToPath } from 'node:url';
 import fs from 'node:fs/promises';
 import path from 'node:path';
 
-import writeOutputFile from '../writeOutputFile.js';
+import writeOutputFile from '../writeOutputFile.mjs';
 
 describe('writeOutputFile', () => {
 	it('creates a file', async () => {

lib/cli.js

@@ -10,7 +10,7 @@ const { isPlainObject } = require('./utils/validateTypes');
 const checkInvalidCLIOptions = require('./utils/checkInvalidCLIOptions');
 const printConfig = require('./printConfig');
 const standalone = require('./standalone');
-const writeOutputFile = require('./writeOutputFile');
+const writeOutputFile = require('./writeOutputFile.cjs');
 const resolveCustomFormatter = require('./resolveCustomFormatter');
 const {
 	DEFAULT_CACHE_LOCATION,

lib/writeOutputFile.cjs

@@ -0,0 +1,19 @@
+'use strict';
+
+const node_path = require('node:path');
+const promises = require('node:fs/promises');
+const stripAnsi = require('strip-ansi');
+const writeFileAtomic = require('write-file-atomic');
+
+/**
+ * @param {string} content
+ * @param {string} filePath
+ * @returns {Promise<void>}
+ */
+async function writeOutputFile(content, filePath) {
+	await promises.mkdir(node_path.dirname(filePath), { recursive: true });
+
+	await writeFileAtomic(node_path.normalize(filePath), stripAnsi(content));
+}
+
+module.exports = writeOutputFile;

lib/writeOutputFile.mjs

@@ -0,0 +1,15 @@
+import { dirname, normalize } from 'node:path';
+import { mkdir } from 'node:fs/promises';
+import stripAnsi from 'strip-ansi';
+import writeFileAtomic from 'write-file-atomic';
+
+/**
+ * @param {string} content
+ * @param {string} filePath
+ * @returns {Promise<void>}
+ */
+export default async function writeOutputFile(content, filePath) {
+	await mkdir(dirname(filePath), { recursive: true });
+
+	await writeFileAtomic(normalize(filePath), stripAnsi(content));
+}

package.json

@@ -29,13 +29,19 @@
   },
   "files": [
     "bin/**/*.js",
+    "bin/**/*.cjs",
+    "bin/**/*.mjs",
     "lib/**/*.js",
+    "lib/**/*.cjs",
+    "lib/**/*.mjs",
     "!**/__tests__/**",
     "!lib/testUtils/**",
     "types/stylelint/index.d.ts"
   ],
   "scripts": {
     "benchmark-rule": "node scripts/benchmark-rule.mjs",
+    "build": "rollup -c",
+    "postinstall": "npm run build",
     "format": "prettier . --write --cache",
     "lint": "npm-run-all --parallel --continue-on-error lint:*",
     "lint:formatting": "prettier . --check --cache",
@@ -45,7 +51,7 @@
     "prepare": "husky install && patch-package",
     "release": "np --no-release-draft",
     "pretest": "npm run lint",
-    "test": "node --experimental-vm-modules node_modules/jest/bin/jest.js",
+    "test": "npm run build && node --experimental-vm-modules node_modules/jest/bin/jest.js",
     "test-coverage": "npm test --ignore-scripts -- --coverage",
     "test-only": "npm test --ignore-scripts",
     "version": "changeset version",
@@ -211,6 +217,7 @@
     "postcss-sass": "^0.5.0",
     "postcss-scss": "^4.0.6",
     "remark-cli": "^11.0.0",
+    "rollup": "^3.26.0",
     "sugarss": "^4.0.1",
     "typescript": "^5.1.6"
   },

rollup.config.mjs

@@ -0,0 +1,14 @@
+import fg from 'fast-glob';
+
+const inputFiles = fg.globSync(['lib/**/*.mjs', '!**/__tests__/**', '!lib/testUtils/**']);
+
+export default inputFiles.map((input) => {
+	return {
+		input,
+		output: {
+			format: 'cjs',
+			file: input.replace('.mjs', '.cjs'),
+			generatedCode: 'es2015',
+		},
+	};
+});

tsconfig.json

@@ -13,6 +13,7 @@
 		"noUnusedParameters": true,
 		"noUncheckedIndexedAccess": true,
 		"resolveJsonModule": true,
+		"esModuleInterop": true,
 		"skipLibCheck": false,
 		"paths": {
 			"*": ["./node_modules/@types/*", "./types/*"]