update to esm

Author: jimmywarting

bin/cmd.js

@@ -1,8 +1,16 @@
 #!/usr/bin/env node
+/* eslint-disable no-var, no-eval */
 
-if (process.version.match(/v(\d+)\./)[1] < 4) {
-  console.error('standardx: Node v4 or greater is required. `standardx` did not run.')
+var match = process.version.match(/v(\d+)\.(\d+)/)
+var major = parseInt(match[1], 10)
+var minor = parseInt(match[2], 10)
+
+if (major >= 12 || (major === 12 && minor >= 20)) {
+  eval('import("standard-engine")').then(function (standardEngine) {
+    eval('import("../options.js")').then(function (options) {
+      standardEngine.cli(options.default)
+    })
+  })
 } else {
-  const opts = require('../options')
-  require('standard-engine').cli(opts)
+  console.error('standardx: Node 12.20.0 or greater is required. `standardx` did not run.')
 }

index.js

@@ -1,5 +1,7 @@
 /*! standardx. MIT License. Feross Aboukhadijeh <https://feross.org/opensource> */
-const Linter = require('standard-engine').linter
-const opts = require('./options')
+import standardEngine from 'standard-engine'
+import opts from './options.js'
 
-module.exports = new Linter(opts)
+const Linter = standardEngine.linter
+
+export default new Linter(opts)

options.js

@@ -1,17 +1,18 @@
-const pkg = require('./package.json')
-const stdVersion = require('standard/package.json').version
-const stdOpts = require('standard/options.js')
+import { readFileSync } from 'node:fs'
+import stdOpts from 'standard/options.js'
 
-const opts = Object.assign({}, stdOpts, {
+const stdVersion = stdOpts.version
+const pkg = JSON.parse(readFileSync(new URL('./package.json', import.meta.url), 'utf-8'))
+const baseConfig = JSON.parse(readFileSync(stdOpts.eslintConfig.configFile, 'utf-8'))
+
+export default Object.assign({}, stdOpts, {
   bugs: pkg.bugs.url,
   cmd: 'standardx',
   eslintConfig: {
-    baseConfig: require('standard/eslintrc.json'),
+    baseConfig,
     useEslintrc: true
   },
   homepage: pkg.homepage,
   tagline: 'Use JavaScript Standard Style (tweaked by standardx)',
   version: `${pkg.version} (standard ${stdVersion})`
 })
-
-module.exports = opts

package.json

@@ -11,14 +11,18 @@
   "bugs": {
     "url": "https://github.com/standard/standardx/issues"
   },
+  "type": "module",
   "dependencies": {
     "standard": "^16.0.1",
     "standard-engine": "^14.0.1"
   },
   "devDependencies": {
     "cross-spawn": "^7.0.3",
     "tap-spec": "^5.0.0",
-    "tape": "^5.0.1"
+    "tape": "^5.3.1"
+  },
+  "engines": {
+    "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
   },
   "homepage": "https://github.com/standard/standardx",
   "keywords": [],

test/index.js

@@ -1,8 +1,8 @@
-const path = require('path')
-const test = require('tape')
-const crossSpawn = require('cross-spawn')
+import { fileURLToPath } from 'node:url'
+import test from 'tape'
+import crossSpawn from 'cross-spawn'
 
-const CMD_PATH = path.join(__dirname, '..', 'bin', 'cmd.js')
+const CMD_PATH = fileURLToPath(new URL('../bin/cmd.js', import.meta.url))
 
 test('command line usage: --help', function (t) {
   t.plan(2)
@@ -16,7 +16,7 @@ test('command line usage: --help', function (t) {
 test('test-repo-eslintrc allows snake_case', function (t) {
   t.plan(4)
 
-  const jsPath = path.join(__dirname, 'test-repo-eslintrc', 'index.js')
+  const jsPath = fileURLToPath(new URL('./test-repo-eslintrc/index.js', import.meta.url))
   const result = crossSpawn.sync(CMD_PATH, [jsPath])
 
   t.error(result.error)
@@ -29,7 +29,7 @@ test('test-repo-eslintrc allows snake_case', function (t) {
 test('test-repo-package-json allows snake_case', function (t) {
   t.plan(4)
 
-  const jsPath = path.join(__dirname, 'test-repo-package-json', 'index.js')
+  const jsPath = fileURLToPath(new URL('./test-repo-package-json/index.js', import.meta.url))
   const result = crossSpawn.sync(CMD_PATH, [jsPath])
 
   t.error(result.error)