options-extra.js

#!/usr/bin/env node

// This is used as an example in the README for extra option features.
// See also options-env.js for more extensive env examples,
// and options-conflicts.js for more details about .conflicts().

// const { Command, Option } = require('commander'); // (normal include)
const { Command, Option } = require('../'); // include commander in git clone of commander repo
const program = new Command();

program
  .addOption(new Option('-s, --secret').hideHelp())
  .addOption(new Option('-t, --timeout <delay>', 'timeout in seconds').default(60, 'one minute'))
  .addOption(new Option('-d, --drink <size>', 'drink cup size').choices(['small', 'medium', 'large']))
  .addOption(new Option('-p, --port <number>', 'port number').env('PORT'))
  .addOption(new Option('--donate [amount]', 'optional donation in dollars').preset('20').argParser(parseFloat))
  .addOption(new Option('--disable-server', 'disables the server').conflicts('port'));

program.parse();

console.log('Options: ', program.opts());

// Try the following:
//    node options-extra.js --help
//    node options-extra.js --drink huge
//    PORT=80 node options-extra.js
//    node options-extra.js --donate
//    node options-extra.js --donate 30.50
//    node options-extra.js --disable-server --port 8000