How to break the option list up into groups

Demonstrates breaking the option list up into groups.

Code

const getUsage = require('command-line-usage')

const optionDefinitions = [
  {
    name: 'help',
    description: 'Display this usage guide.',
    alias: 'h',
    type: Boolean,
    group: 'main'
  },
  {
    name: 'src',
    description: 'The input files to process',
    multiple: true,
    defaultOption: true,
    typeLabel: '{underline file} ...',
    group: 'input'
  },
  {
    name: 'timeout',
    description: 'Timeout value in ms',
    alias: 't',
    typeLabel: '{underline ms}',
    group: 'main'
  },
  {
    name: 'plugin',
    description: 'A plugin path',
    type: String
  }
]

const sections = [
  {
    header: 'A typical app',
    content: 'Generates something {italic very} important.'
  },
  {
    header: 'Main options',
    optionList: optionDefinitions,
    group: [ 'main', 'input' ]
  },
  {
    header: 'Misc',
    optionList: optionDefinitions,
    group: '_none'
  }
]

console.log(getUsage(sections))

Output