@snailicide/cli-app 🐌

Node Cli App Boilerplate with yargs, zod, chalk

• Github: @snailicide/cli-app • snailicide-monorepo
• CDN: jsdeliver

Author

👤 Gillian Tunney

• github
• email

Recommended package manager is pnpm

@snailicide/cli-app 🐌

The @snailicide/cli-app package is a builder application for making custom command-line interface (CLI) application. Developers can quickly bootstrap a boilerplate with powerful validation/parsing schemas. It leverages several libraries to provide robust and interactive user experience.

Key Features

• Command-Line Parsing: Utilizes yargs and yargs-interactive for parsing command-line arguments and handling interactive prompts.
• Schema Validation/Handling: Use zod schemas to parse/validate input, including resolving user options & application configurations, and generating Yargs-compatible option objects.
• Configuration Management: Manages application configurations using schemas defined with zod. This ensures that configurations are validated and adhere to expected structures.
• Title /HelpScreen Management: Manage custom cli options and customize appearance of title/help menu terminal output.

Installation

This library is published in the NPM registry and can be installed using any compatible package manager as a development dependency.

#pnpm
pnpm add @snailicide/cli-app

#yarn
yarn add @snailicide/cli-app

#npm
npm install @snailicide/cli-app

Example Usage

The cli-app package can be initialized and configured using the initApp function, which sets up the application based on provided schemas and options, and supports interactive prompts if needed.

import { z } from 'zod'

import {
  AppConfigIn,
  commonFlagsSchema,
  initApp,
  InitSuccessCallback,
  WrappedSchema,
  wrapSchema,
} from './index.js'

/** Define custom schema, wrapper is required to avoid typescript error */
const custom_schema = z.object({
  testarr: z.number().array().default([]).describe('test array'),
  testarr2: z.string().array().default([]).describe('test array'),
})
const my_merged_schema = wrapSchema<typeof commonFlagsSchema>(commonFlagsSchema)
  .merge(custom_schema)
  .transform((value) => {
    return value
  })
  .describe('this is a sample app that is made of fun')

type MergedSchema = WrappedSchema<typeof my_merged_schema>

/** Set the init function which will be called after app is intialized with typed arguments. */
const initFunc: InitSuccessCallback<MergedSchema> = <
  Schema extends
    | z.AnyZodObject
    | z.ZodEffects<z.AnyZodObject> = typeof commonFlagsSchema,
>(
  args: z.infer<Schema>,
) => {
  if (args['testarr']) {
    console.warn('RESOLVED APP ARGS: ', args)
  }
  console.log(JSON.stringify(args))
  return true
}

/** Example app configuration options */
const exampleAppConfigOptions: AppConfigIn<MergedSchema> = {
  description: 'This is an example to demonstrate use',
  //code editor error
  examples: [
    ['$0 --config "~/config.json"', 'Use custom config'],
    ['$0 --safe', 'Start in safe mode'],
  ],
  flag_aliases: {
    outDir: 'o',
    rootDir: 'r',
    // help: 'h',
    //version: 'v',
  },
  hidden: ['debug', 'testarr2'],
  name: 'Example App',
}

/** Initialize App */
const initialize = async (): Promise<'SUCCESS' | 'ERROR'> => {
  const instance_yargs = await initApp<MergedSchema>(
    my_merged_schema,
    exampleAppConfigOptions,
    initFunc,
  )
  if (instance_yargs === undefined) {
    process.exit(1)
    return 'ERROR'
  }
  process.exit(0)
  return 'SUCCESS'
}

export default initialize()

Helpful Links

• yargs
• yargs-interactive
• zod
• chalk
• figlet