fix: use esm build in when using import

.github/workflows/ci.yaml

@@ -2,19 +2,25 @@ name: ci
 
 on:
   push:
+    branches:
+      - main
   pull_request:
 
 jobs:
   test:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [12, 14, 16]
-        experimental: [false]
         include:
+          - node: 14
+            lts: true
+          - node: 16
+            lts: true
           - node: 17
-            experimental: true
-    continue-on-error: ${{ matrix.experimental }}
+            lts: false
+          - node: 18
+            lts: false
+    continue-on-error: ${{ ! matrix.lts }}
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3

.gitignore

@@ -9,3 +9,4 @@
 node_modules/
 lib/
 coverage/
+tests/smoke/*/yarn.lock

examples/calculator.ts

@@ -1,11 +1,13 @@
-import { program, command, argument } from '../src'
+import { argument, command, program } from '../src/index.js'
 
 type Args = { number: number[] }
 
 const number = argument('number', { type: 'number', variadic: true })
 
-const makeOutput = (op: string, initial = (args: Args) => 0) => (args: Args) =>
-  args.number.reduce((sum, arg) => eval(`${sum} ${op} ${arg}`), initial(args))
+const makeOutput =
+  (op: string, initial = (args: Args) => 0) =>
+  (args: Args) =>
+    args.number.reduce((sum, arg) => eval(`${sum} ${op} ${arg}`), initial(args))
 
 program()
   .description('calculator')

examples/cat.ts

@@ -1,5 +1,5 @@
 import { readFileSync } from 'fs'
-import { command, program } from '../src'
+import { command, program } from '../src/index.js'
 
 const cat = command('cat')
   .description('Concatenate files')

examples/dice.ts

@@ -1,4 +1,4 @@
-import { program, command } from '../src'
+import { command, program } from '../src/index.js'
 
 async function rng(bounds: [number, number]) {
   const [min, max] = bounds
@@ -14,4 +14,4 @@ const dice = program().add(
     })
 )
 
-dice.repl()
+dice.runOrRepl()

examples/errors.ts

@@ -1,55 +1,47 @@
-import { command, program } from '../src'
+import { command, program } from '../src/index.js'
 
 const app = program()
 
 const syncOk = command('sync')
   .description('Print sync message')
-  .action(function () {
-    console.log('ok/sync')
-  })
+  .action(() => 'ok/sync')
 
 const asyncOk = command('async')
   .description('Print async message')
-  .action(async function () {
-    console.log('ok/async')
-  })
+  .action(async () => 'ok/async')
 
 const syncNok = command('sync')
   .description('Throw sync error')
-  .action(function () {
+  .action(() => {
     throw new Error('nok/sync')
   })
 
 const asyncNok = command('async')
   .description('Throw async error')
-  .action(async function () {
+  .action(async () => {
     throw new Error('nok/async')
   })
 
 const syncValidation = command('sync')
   .description('Test validation error with sync handler')
   .argument('required')
-  .action(function () {
-    console.log('call without arguments')
-  })
+  .action(() => 'call without arguments')
 
 const asyncValidation = command('async')
   .description('Test validation error with async handler')
   .argument('required')
-  .action(async function () {
-    console.log('call without arguments')
-  })
+  .action(async () => 'call without arguments')
 
 const noHandler = command('no_handler').description(
   'Test missing command handler'
 )
 
 // Say bye
-const success = (resolved: unknown) => console.log('[success]', resolved)
+const success = (resolved: unknown) => console.log('resolved:', resolved)
 
 // Print error message only (omit stack trace) and exit with a meaningful status
 const fail = (error: any) => {
-  console.error('[failed]', String(error))
+  console.error('rejected:', String(error))
 
   if (!app.isRepl()) {
     process.exit(42)

examples/foo.ts

@@ -1,4 +1,4 @@
-import { program, command } from '../src'
+import { command, program } from '../src/index.js'
 
 const foo = command('foo')
   .description('Outputs "bar".')

examples/pizza.ts

@@ -1,4 +1,4 @@
-import { program, command } from '../src'
+import { command, program } from '../src/index.js'
 
 const cmd = command()
   .argument('address', {

examples/pretty.ts

@@ -1,4 +1,4 @@
-import { command, program } from '../src'
+import { command, program } from '../src/index.js'
 
 const app = program()
   .description('JSON pretty printer')

examples/repl.ts

@@ -1,4 +1,4 @@
-import { command, program } from '../src'
+import { command, program } from '../src/index.js'
 
 let url: string | null = null
 

examples/simple.ts

@@ -1,4 +1,4 @@
-import { program, command } from '../src'
+import { command, program } from '../src/index.js'
 
 const echo = command('concat')
   .description('Concatenate input')

examples/types.ts

@@ -1,4 +1,4 @@
-import { command, program } from '../src'
+import { command, program } from '../src/index.js'
 
 /**
  * Keep in mind that argument/option types are not validated at runtime.

package.json

@@ -30,7 +30,7 @@
   "main": "./lib/cjs/index.cjs",
   "exports": {
     "types": "./lib/types/index.d.ts",
-    "import": "./lib/cjs/index.cjs",
+    "import": "./lib/esm/index.js",
     "require": "./lib/cjs/index.cjs"
   },
   "type": "module",
@@ -50,33 +50,33 @@
     "test:unit": "jest",
     "test:types": "tsd",
     "test:smoke": "./tests/smoke/run.sh",
-    "start": "ts-node",
+    "start": "node --loader ts-node/esm",
     "release": "semantic-release"
   },
   "dependencies": {
-    "@types/yargs": "17.0.2",
+    "@types/yargs": "17.0.10",
     "enquirer": "^2.3.6",
     "string-argv": "^0.3.1",
     "typed-emitter": "^2.1.0",
-    "yargs": "^17.4.0"
+    "yargs": "^17.5.1"
   },
   "devDependencies": {
     "@semantic-release/changelog": "6.0.1",
     "@semantic-release/git": "10.0.1",
-    "@types/jest": "27.4.1",
-    "@types/node": "17.0.23",
+    "@types/jest": "27.5.1",
+    "@types/node": "17.0.33",
     "convert-extension": "0.3.0",
-    "doctoc": "2.1.0",
-    "husky": "7.0.4",
-    "jest": "27.5.1",
+    "doctoc": "2.2.0",
+    "husky": "8.0.1",
+    "jest": "28.1.0",
     "leasot": "13.1.0",
     "mock-argv": "2.0.8",
     "prettier": "2.6.2",
     "semantic-release": "19.0.2",
-    "ts-jest": "27.1.4",
+    "ts-jest": "28.0.2",
     "ts-node": "10.7.0",
     "tsd": "0.20.0",
-    "typescript": "4.6.3"
+    "typescript": "4.6.4"
   },
   "tsd": {
     "directory": "tests/types"

src/command.ts

@@ -1,13 +1,10 @@
-import { Arguments as BaseArguments, Argv, CommandModule } from 'yargs'
+import { ArgumentsCamelCase, Argv, CommandModule } from 'yargs'
 import { Argument, ArgumentOptions } from './argument.js'
 import { InferArgType } from './baseArg.js'
 import { Option, OptionOptions } from './option.js'
 import { prompter } from './prompter.js'
 
-export type Arguments<T = {}> = T &
-  BaseArguments<T> & {
-    __promise?: Promise<any>
-  }
+export type YargsArguments<T = {}> = ArgumentsCamelCase<T>
 
 type CommandOptions = {
   /**
@@ -30,7 +27,7 @@ type CommandOptions = {
 type CommandRunner = (command: string) => Promise<unknown>
 
 export interface HandlerFn<T> {
-  (args: Omit<T, '_' | '$0'>, commandRunner: CommandRunner): Promise<any> | any
+  (args: T, commandRunner: CommandRunner): Promise<any> | any
 }
 
 function isArgument(obj: Argument | Option | Command): obj is Argument {
@@ -213,6 +210,7 @@ export class Command<T = {}> {
       aliases: [],
       describe: this.options.hidden ? false : this.options.description || '',
       builder: this.getBuilder(commandRunner),
+      // @ts-ignore Our handler returns a different type than void
       handler: this.getHandler(commandRunner),
     }
     return module
@@ -261,23 +259,21 @@ export class Command<T = {}> {
   }
 
   /**
-   * Wraps the actual command handler to insert prompt and async handler logic.
-   * Takes command runner.
+   * Wraps the actual command handler to insert prompt and handler logic.
    */
   private getHandler(commandRunner: CommandRunner) {
-    return async (argv: Arguments<T>) => {
-      const { _, $0, ...rest } = argv
+    return async (argv: YargsArguments<T> & { __promise?: Promise<any> }) => {
       const prompterInstance = prompter(
         [...this.getArguments(), ...this.getOptions()],
-        rest
+        argv
       )
 
       let promise = prompterInstance.prompt()
 
-      promise = promise.then((args) => {
+      promise = promise.then(({ _, $0, __promise, ...args }) => {
         // @todo coerce all types and remove coerce option from baseArg
         if (this.handler) {
-          return this.handler(args, commandRunner)
+          return this.handler(args as unknown as T, commandRunner)
         }
 
         // Display help if this command contains sub-commands

src/program.ts

@@ -4,7 +4,7 @@ import path from 'path'
 import TypedEventEmitter from 'typed-emitter'
 import { Argv, ParserConfigurationOptions } from 'yargs'
 import createYargs from 'yargs/yargs'
-import { Arguments, Command, command } from './command.js'
+import { command, Command } from './command.js'
 import { history, History } from './history.js'
 import { Repl, repl } from './repl.js'
 import { isPromise } from './utils.js'
@@ -215,7 +215,7 @@ export class Program extends (EventEmitter as new () => TypedEventEmitter<Events
     return new Promise((resolve, reject) => {
       // @ts-ignore Not sure why this is needed?
       this.createYargsInstance()
-        .parse(cmd, {}, (err, argv: Arguments | Promise<Arguments>, output) => {
+        .parse(cmd, {}, (err, argv, output) => {
           // We don't use yargs 17 promise style argv
           if (isPromise(argv)) {
             throw new Error('argv is of unexpected type')

src/prompter.ts

@@ -1,7 +1,13 @@
-import { prompt } from 'enquirer'
+import Enquirer from 'enquirer'
 import { Argument } from './argument.js'
 import { Option } from './option.js'
 
+/**
+ * Workaround for "The requested module 'enquirer' is a CommonJS module, which
+ * may not support all module.exports as named exports."
+ */
+const prompt = Enquirer.prompt
+
 type PromptType =
   | 'input'
   | 'number'

src/repl.ts

@@ -1,4 +1,3 @@
-import { Prompt } from 'enquirer'
 import { CompleterResult } from 'readline'
 import nodeRepl, { REPLServer } from 'repl'
 import { parseArgsStringToArgv } from 'string-argv'
@@ -53,9 +52,9 @@ export class Repl {
     // Setup history
     this.history?.hydrateReplServer(this.server)
 
-    // Fixes bug with hidden cursor after enquirer prompt
-    // @ts-ignore
-    new Prompt().cursorShow()
+    // Fixes bug with hidden cursor after enquirer prompt, this is identical to
+    // the enquirer method Prompt.cursorShow()
+    process.stdout.write(`\u001b[?25h`)
   }
 
   public stop() {