yargonaut

Decorate yargs content with chalk styles and figlet fonts

yargonaut is the content decorator for yargs, allowing you to customize your yargs-based CLI output using chalk styles and/or figlet fonts ... easily!

yargonaut-demo

Why? Because CLI apps with color and ASCII Art are more fun!

Could you customize yargs text, possibly using chalk or figlet, without yargonaut? Absolutely. But yargonaut makes it so easy! And yargonaut supports all locales that yargs and figlet support - out of the box.

Could terminal coloring or ASCII Art fonts be annoying in CLI apps? Well, sure. But used tastefully, it can add a degree of creative flair to make your CLI stand out. Use wisely!

Install

npm install --save yargonaut yargs

var yargonaut = require('yargonaut') // yargonaut first!
var yargs = require('yargs') // then yargs

yargonaut assumes you have yargs installed independently.

To automatically support all locales that yargs supports, make sure to require('yargonaut') in code before you require('yargs'). This is important! If you choose to ignore this, yargonaut will attempt workarounds as best it can, but any issues caused by incorrect ordering of require() statements will not be given priority. The ordering should be natural, since you'll need to configure yargonaut before yargs parses CLI args anyway.

Note that yargonaut does not wrap yargs and is not a replacement for yargs. It's built to work with yargs side-by-side, and it doesn't lock you in to a particular version of yargs, though internal string customization is only supported in yargs v3.16.1 and up.

If anything goes wrong, yargonaut attempts to fail gracefully and silently, so your CLI still works, just without the cool colors/fonts.

Examples

Use a single style and font for all top-level yargs strings:

require('yargonaut')
  .style('blue')
  .font('Small Slant') // that's it!

var argv = require('yargs')
  .command('add', 'Add item to cart')
  .command('rm', 'Remove item from cart')
  .option('p', {
    alias: 'product',
    describe: 'Product id(s)',
    demand: true
  })
  .option('s', {
    alias: 'size',
    describe: 'Desired product size',
    choices: ['s', 'm', 'l'],
    default: 'm'
  })
  .option('c', {
    alias: 'color',
    describe: 'Desired product color'
  })
  .example('$0 add -p 123 -s l -c green', 'Add large, green product with id 123')
  .wrap(null)
  .argv

$ node order.js
  _____                              __    _
 / ___/__  __ _  __ _  ___ ____  ___/ /__ (_)
/ /__/ _ \/  ' \/  ' \/ _ `/ _ \/ _  (_-<_
\___/\___/_/_/_/_/_/_/\_,_/_//_/\_,_/___(_)

  add  Add item to cart
  rm   Remove item from cart

  ____       __  _               _
 / __ \___  / /_(_)__  ___  ___ (_)
/ /_/ / _ \/ __/ / _ \/ _ \(_-<_
\____/ .__/\__/_/\___/_//_/___(_)
    /_/
  -p, --product  Product id(s)  [required]
  -s, --size     Desired product size  [choices: "s", "m", "l"] [default: "m"]
  -c, --color    Desired product color

   ____                     __        _
  / __/_ _____ ___ _  ___  / /__ ___ (_)
 / _/ \ \ / _ `/  ' \/ _ \/ / -_|_-<_
/___//_\_\\_,_/_/_/_/ .__/_/\__/___(_)
                   /_/
  order.js add -p 123 -s l -c green  Add large, green product with id 123

   __  ____         _                               _            __                                    __  _
  /  |/  (_)__ ___ (_)__  ___ _  _______ ___ ___ __(_)______ ___/ / ___ ________ ___ ____ _  ___ ___  / /_(_)
 / /|_/ / (_-<(_-</ / _ \/ _ `/ / __/ -_) _ `/ // / / __/ -_) _  / / _ `/ __/ _ `/ // /  ' \/ -_) _ \/ __/
/_/  /_/_/___/___/_/_//_/\_, / /_/  \__/\_, /\_,_/_/_/  \__/\_,_/  \_,_/_/  \_, /\_,_/_/_/_/\__/_//_/\__(_)  
                        /___/            /_/                               /___/
   p

Use one style and font for help content and another for error messages:

require('yargonaut')
  .help('3D-ASCII')
  .helpStyle('green')
  .errors('Calvin S')
  .errorsStyle('red')

var argv = require('yargs')
  .command('add', 'Add item to cart')
  .command('rm', 'Remove item from cart')
  .option('p', {
    alias: 'product',
    describe: 'Product id(s)',
    demand: true
  })
  .option('s', {
    alias: 'size',
    describe: 'Desired product size',
    choices: ['s', 'm', 'l'],
    default: 'm'
  })
  .option('c', {
    alias: 'color',
    describe: 'Desired product color'
  })
  .example('$0 add -p 123 -s l -c green', 'Add large, green product with id 123')
  .wrap(null)
  .argv

$ node order.js
 ________  ________  _____ ______   _____ ______   ________  ________   ________  ________
|\   ____\|\   __  \|\   _ \  _   \|\   _ \  _   \|\   __  \|\   ___  \|\   ___ \|\   ____\  ___
\ \  \___|\ \  \|\  \ \  \\\__\ \  \ \  \\\__\ \  \ \  \|\  \ \  \\ \  \ \  \_|\ \ \  \___|_|\__\
 \ \  \    \ \  \\\  \ \  \\|__| \  \ \  \\|__| \  \ \   __  \ \  \\ \  \ \  \ \\ \ \_____  \|__|
  \ \  \____\ \  \\\  \ \  \    \ \  \ \  \    \ \  \ \  \ \  \ \  \\ \  \ \  \_\\ \|____|\  \  ___
   \ \_______\ \_______\ \__\    \ \__\ \__\    \ \__\ \__\ \__\ \__\\ \__\ \_______\____\_\  \|\__\
    \|_______|\|_______|\|__|     \|__|\|__|     \|__|\|__|\|__|\|__| \|__|\|_______|\_________\|__|
                                                                                    \|_________|


  add  Add item to cart
  rm   Remove item from cart

 ________  ________  _________  ___  ________  ________   ________
|\   __  \|\   __  \|\___   ___\\  \|\   __  \|\   ___  \|\   ____\  ___
\ \  \|\  \ \  \|\  \|___ \  \_\ \  \ \  \|\  \ \  \\ \  \ \  \___|_|\__\
 \ \  \\\  \ \   ____\   \ \  \ \ \  \ \  \\\  \ \  \\ \  \ \_____  \|__|
  \ \  \\\  \ \  \___|    \ \  \ \ \  \ \  \\\  \ \  \\ \  \|____|\  \  ___
   \ \_______\ \__\        \ \__\ \ \__\ \_______\ \__\\ \__\____\_\  \|\__\
    \|_______|\|__|         \|__|  \|__|\|_______|\|__| \|__|\_________\|__|
                                                            \|_________|


  -p, --product  Product id(s)  [required]
  -s, --size     Desired product size  [choices: "s", "m", "l"] [default: "m"]
  -c, --color    Desired product color

 _______      ___    ___ ________  _____ ______   ________  ___       _______   ________
|\  ___ \    |\  \  /  /|\   __  \|\   _ \  _   \|\   __  \|\  \     |\  ___ \ |\   ____\  ___
\ \   __/|   \ \  \/  / | \  \|\  \ \  \\\__\ \  \ \  \|\  \ \  \    \ \   __/|\ \  \___|_|\__\
 \ \  \_|/__  \ \    / / \ \   __  \ \  \\|__| \  \ \   ____\ \  \    \ \  \_|/_\ \_____  \|__|
  \ \  \_|\ \  /     \/   \ \  \ \  \ \  \    \ \  \ \  \___|\ \  \____\ \  \_|\ \|____|\  \  ___
   \ \_______\/  /\   \    \ \__\ \__\ \__\    \ \__\ \__\    \ \_______\ \_______\____\_\  \|\__\
    \|_______/__/ /\ __\    \|__|\|__|\|__|     \|__|\|__|     \|_______|\|_______|\_________\|__|
             |__|/ \|__|                                                          \|_________|


  order.js add -p 123 -s l -c green  Add large, green product with id 123

╔╦╗┬┌─┐┌─┐┬┌┐┌┌─┐  ┬─┐┌─┐┌─┐ ┬ ┬┬┬─┐┌─┐┌┬┐  ┌─┐┬─┐┌─┐┬ ┬┌┬┐┌─┐┌┐┌┌┬┐
║║║│└─┐└─┐│││││ ┬  ├┬┘├┤ │─┼┐│ ││├┬┘├┤  ││  ├─┤├┬┘│ ┬│ ││││├┤ │││ │
╩ ╩┴└─┘└─┘┴┘└┘└─┘  ┴└─└─┘└─┘└└─┘┴┴└─└─┘─┴┘  ┴ ┴┴└─└─┘└─┘┴ ┴└─┘┘└┘ ┴
   p

Customize only specific yargs strings:

require('yargonaut')
  .font('DOS Rebel', 'Invalid values:')
  .style('yellow', 'Invalid values:')

var argv = require('yargs')
  .option('s', {
    alias: 'size',
    describe: 'Desired product size',
    choices: ['s', 'm', 'l'],
    demand: true
  })
  .showHelpOnFail(false)
  .argv

$ node order.js -s xl
 █████                                  ████   ███      █████                          ████
░░███                                  ░░███  ░░░      ░░███                          ░░███
 ░███  ████████   █████ █████  ██████   ░███  ████   ███████     █████ █████  ██████   ░███  █████ ████  ██████   █████  ██
 ░███ ░░███░░███ ░░███ ░░███  ░░░░░███  ░███ ░░███  ███░░███    ░░███ ░░███  ░░░░░███  ░███ ░░███ ░███  ███░░███ ███░░  ░░
 ░███  ░███ ░███  ░███  ░███   ███████  ░███  ░███ ░███ ░███     ░███  ░███   ███████  ░███  ░███ ░███ ░███████ ░░█████
 ░███  ░███ ░███  ░░███ ███   ███░░███  ░███  ░███ ░███ ░███     ░░███ ███   ███░░███  ░███  ░███ ░███ ░███░░░   ░░░░███
 █████ ████ █████  ░░█████   ░░████████ █████ █████░░████████     ░░█████   ░░████████ █████ ░░████████░░██████  ██████  ██
░░░░░ ░░░░ ░░░░░    ░░░░░     ░░░░░░░░ ░░░░░ ░░░░░  ░░░░░░░░       ░░░░░     ░░░░░░░░ ░░░░░   ░░░░░░░░  ░░░░░░  ░░░░░░  ░░



  Argument: s, Given: "xl", Choices: "s", "m", "l"

Change default rendering strategy for a specific string:

require('yargonaut')
  .errors('ANSI Shadow')
  .transformWholeString('Unknown argument: %s')

var argv = require('yargs')
  .showHelpOnFail(false)
  .strict()
  .argv

$ node order.js -a -b
██╗   ██╗███╗   ██╗██╗  ██╗███╗   ██╗ ██████╗ ██╗    ██╗███╗   ██╗     █████╗ ██████╗  ██████╗ ██╗   ██╗███╗   ███╗███████╗███╗   ██╗████████╗███████╗        █████╗        ██████╗
██║   ██║████╗  ██║██║ ██╔╝████╗  ██║██╔═══██╗██║    ██║████╗  ██║    ██╔══██╗██╔══██╗██╔════╝ ██║   ██║████╗ ████║██╔════╝████╗  ██║╚══██╔══╝██╔════╝██╗    ██╔══██╗       ██╔══██╗
██║   ██║██╔██╗ ██║█████╔╝ ██╔██╗ ██║██║   ██║██║ █╗ ██║██╔██╗ ██║    ███████║██████╔╝██║  ███╗██║   ██║██╔████╔██║█████╗  ██╔██╗ ██║   ██║   ███████╗╚═╝    ███████║       ██████╔╝
██║   ██║██║╚██╗██║██╔═██╗

Yargonaut

Install / Use

README