esm

package.json

@@ -20,14 +20,21 @@
     "node": "^18.18.0 || >=20.0.0",
     "npm": ">=8.12.1"
   },
+  "exports": {
+    ".": {
+      "import": "./build/index.js",
+      "require": "./build/index.js"
+    }
+  },
+  "type": "module",
   "main": "build/index.js",
   "types": "build/index.d.ts",
   "scripts": {
     "build": "rimraf build && npm run build:options && vite build",
     "build:options": "vite-node src/scripts/build-options.ts",
     "lint": "cross-env FORCE_COLOR=1 npm-run-all --parallel --aggregate-output lint:*",
     "lint:lockfile": "lockfile-lint",
-    "lint:markdown": "markdownlint \"**/*.md\" --ignore node_modules --ignore build --config .markdownlint.js",
+    "lint:markdown": "markdownlint \"**/*.md\" --ignore node_modules --ignore build --config .markdownlint.cjs",
     "lint:src": "eslint --cache --cache-location node_modules/.cache/.eslintcache --ignore-path .gitignore --report-unused-disable-directives .",
     "prepare": "src/scripts/install-hooks && test/bun-setup.sh",
     "prepublishOnly": "npm run build",
@@ -64,7 +71,7 @@
     "@types/js-yaml": "^4.0.9",
     "@types/json-parse-helpfulerror": "^1.0.3",
     "@types/jsonlines": "^0.1.5",
-    "@types/lodash": "^4.17.0",
+    "@types/lodash-es": "^4.17.12",
     "@types/make-fetch-happen": "^10.0.4",
     "@types/mocha": "^10.0.6",
     "@types/node": "^20.11.30",
@@ -105,7 +112,7 @@
     "json-parse-helpfulerror": "^1.0.3",
     "jsonlines": "^0.1.1",
     "lockfile-lint": "^4.13.2",
-    "lodash": "^4.17.21",
+    "lodash-es": "^4.17.21",
     "make-fetch-happen": "^13.0.0",
     "markdownlint-cli": "^0.39.0",
     "mocha": "^10.4.0",
@@ -124,7 +131,6 @@
     "semver": "^7.6.0",
     "semver-utils": "^1.1.4",
     "should": "^13.2.3",
-    "sinon": "^17.0.1",
     "source-map-support": "^0.5.21",
     "spawn-please": "^3.0.0",
     "strip-ansi": "^7.1.0",
@@ -160,7 +166,11 @@
   "mocha": {
     "check-leaks": true,
     "extension": [
-      "test.ts"
+      "ts"
+    ],
+    "node-option": [
+      "experimental-specifier-resolution=node",
+      "loader=ts-node/esm"
     ],
     "require": [
       "source-map-support/register",

src/bin/cli.ts

@@ -1,14 +1,16 @@
 #!/usr/bin/env node
 import { Help, Option, program } from 'commander'
-import cloneDeep from 'lodash/cloneDeep'
-import pickBy from 'lodash/pickBy'
+import { cloneDeep, pickBy } from 'lodash-es'
+import fs from 'node:fs/promises'
+import path from 'node:path'
 import semver from 'semver'
-import pkg from '../../package.json'
-import cliOptions, { renderExtendedHelp } from '../cli-options'
-import ncu from '../index'
-import { chalkInit } from '../lib/chalk'
+import cliOptions, { renderExtendedHelp } from '../cli-options.js'
+import ncu from '../index.js'
+import { chalkInit } from '../lib/chalk.js'
 // async global contexts are only available in esm modules -> function
-import getNcuRc from '../lib/getNcuRc'
+import getNcuRc from '../lib/getNcuRc.js'
+
+const __dirname = path.dirname(new URL(import.meta.url).pathname)
 
 const optionVersionDescription = 'Output the version number of npm-check-updates.'
 
@@ -19,6 +21,8 @@ const uncode = (s: string) => s.replace(/`/g, '')
   // importing update-notifier dynamically as esm modules are only allowed to be dynamically imported inside of cjs modules
   const { default: updateNotifier } = await import('update-notifier')
 
+  const pkg = JSON.parse(await fs.readFile(path.join(__dirname, '../../../package.json'), 'utf-8'))
+
   // check if a new version of ncu is available and print an update notification
   //
   // For testing from specific versions, use:

src/cli-options.ts

@@ -1,11 +1,11 @@
-import sortBy from 'lodash/sortBy'
-import path from 'path'
-import { defaultCacheFile } from './lib/cache'
-import chalk from './lib/chalk'
-import table from './lib/table'
-import CLIOption from './types/CLIOption'
-import ExtendedHelp from './types/ExtendedHelp'
-import { Index } from './types/IndexType'
+import { sortBy } from 'lodash-es'
+import path from 'node:path'
+import { defaultCacheFile } from './lib/cache.js'
+import chalk from './lib/chalk.js'
+import table from './lib/table.js'
+import CLIOption from './types/CLIOption.js'
+import ExtendedHelp from './types/ExtendedHelp.js'
+import { Index } from './types/IndexType.js'
 
 /** Valid strings for the --target option. Indicates the desired version to upgrade to. */
 const supportedVersionTargets = ['latest', 'newest', 'greatest', 'minor', 'patch', 'semver']

src/index.ts

@@ -1,28 +1,28 @@
-import isString from 'lodash/isString'
-import path from 'path'
+import { isString } from 'lodash-es'
+import path from 'node:path'
 import prompts from 'prompts-ncu'
 import spawn from 'spawn-please'
-import { cliOptionsMap } from './cli-options'
-import { cacheClear } from './lib/cache'
-import chalk, { chalkInit } from './lib/chalk'
-import determinePackageManager from './lib/determinePackageManager'
-import doctor from './lib/doctor'
-import exists from './lib/exists'
-import findPackage from './lib/findPackage'
-import getAllPackages from './lib/getAllPackages'
-import getNcuRc from './lib/getNcuRc'
-import initOptions from './lib/initOptions'
-import { print, printJson } from './lib/logging'
-import mergeOptions from './lib/mergeOptions'
-import programError from './lib/programError'
-import runGlobal from './lib/runGlobal'
-import runLocal from './lib/runLocal'
-import { Index } from './types/IndexType'
-import { Options } from './types/Options'
-import { PackageFile } from './types/PackageFile'
-import { PackageInfo } from './types/PackageInfo'
-import { RunOptions } from './types/RunOptions'
-import { VersionSpec } from './types/VersionSpec'
+import { cliOptionsMap } from './cli-options.js'
+import { cacheClear } from './lib/cache.js'
+import chalk, { chalkInit } from './lib/chalk.js'
+import determinePackageManager from './lib/determinePackageManager.js'
+import doctor from './lib/doctor.js'
+import exists from './lib/exists.js'
+import findPackage from './lib/findPackage.js'
+import getAllPackages from './lib/getAllPackages.js'
+import getNcuRc from './lib/getNcuRc.js'
+import initOptions from './lib/initOptions.js'
+import { print, printJson } from './lib/logging.js'
+import mergeOptions from './lib/mergeOptions.js'
+import programError from './lib/programError.js'
+import runGlobal from './lib/runGlobal.js'
+import runLocal from './lib/runLocal.js'
+import { Index } from './types/IndexType.js'
+import { Options } from './types/Options.js'
+import { PackageFile } from './types/PackageFile.js'
+import { PackageInfo } from './types/PackageInfo.js'
+import { RunOptions } from './types/RunOptions.js'
+import { VersionSpec } from './types/VersionSpec.js'
 
 // allow prompt injection from environment variable for testing purposes
 if (process.env.INJECT_PROMPTS) {