cac.future.js

const cli = require('cac')

// call cli.option to add global options

cli.option({
  name: 'cool',
  desc: 'Make CLI cool again',
  required: true,
  type: String
})

cli.option({
  name: 'wow,w',
  desc: 'Say wow',
  type: Boolean
})

cli.command({
  name: 'build',
  // Basically `cmd` == `cli` but with command context
  // i.e. it only adds options to this command
  builder: cmd => cmd.option({
    name: 'production,p',
    default: true,
    desc: 'Minimize code'
  }),
  handler: (args, flags) => {
    console.log(flags.p) // true
  }
})

cli.parse(process.argv)

cli.option adds global option, cmd.option adds command option.

Would be great if the generated help message looks like this:

The debug logger could be very useful too.