[yargs multi subcommand]

yargs_command.js

//https://github.com/yargs/yargs/issues/225

var yargs = require('yargs')
var argv = yargs
  .usage('usage: $0 <command>')
  .command('create', 'create a new [project|module]', function (yargs) {
    argv = yargs
      .usage('usage: $0 create <item> [options]')
      .command('project', 'create a new project', function (yargs) {
        console.log('creating project :)')
      })
      .command('module', 'create a new module', function (yargs) {
        console.log('creating module :)')
      })
      .help('help')
      .updateStrings({
        'Commands:': 'item:'
      })
      .wrap(null)
      .argv
    checkCommands(yargs, argv, 2)
  })
  .command('list', 'list items in project', function (yargs) {
    console.log('listing items in project :)')
  })
  .help('help')
  .wrap(null)
  .argv

checkCommands(yargs, argv, 1)

function checkCommands (yargs, argv, numRequired) {
  if (argv._.length < numRequired) {
    yargs.showHelp()
  } else {
    // check for unknown command
  }
}