const commandLineArgs = require('command-line-args')
/* first - parse the main command name */
let mainDefinitions = [
  { name: 'name', defaultOption: true }
]
const mainCommand = commandLineArgs(mainDefinitions, { stopAtFirstUnknown: true })
let argv = mainCommand._unknown || []
console.log('mainCommand\n===========')
console.log(mainCommand)
/* second - parse the main command options */
if (mainCommand.name === 'run') {
  const runDefinitions = [
    { name: 'detached', alias: 'd', type: Boolean },
    { name: 'target', defaultOption: true }
  ]
  const runOptions = commandLineArgs(runDefinitions, { argv, stopAtFirstUnknown: true })
  argv = runOptions._unknown || []
  console.log('\nrunOptions\n==========')
  console.log(runOptions)
  /* third - parse the sub-command  */
  const subCommandDefinitions = [
    { name: 'name', defaultOption: true }
  ]
  const subCommand = commandLineArgs(subCommandDefinitions, { argv, stopAtFirstUnknown: true })
  console.log('\nsubCommand\n==========')
  console.log(subCommand)
}