storybook/lib/cli/bin/generate.js

import program from 'commander';
import chalk from 'chalk';
import pkg from '../package.json';
import initiate from '../lib/initiate';
import { codeLog } from '../lib/helpers';

const logger = console;

if (process.argv[1].includes('getstorybook')) {
  logger.log(chalk.yellow('WARNING: getstorybook is deprecated.'));
  logger.log(chalk.yellow('The official command to install Storybook from now on is:\n'));
  codeLog(['sb init']);
  logger.log();
  initiate({}, pkg).then(() => process.exit(0));
} else {
  program
    .command('init')
    .description('Initialize Storybook into your project.')
    .option('-f --force', 'Forcely add storybook')
    .option('-s --skip-install', 'Skip installing deps')
    .option('-N --use-npm', 'Use npm to install deps')
    .option('-p --parser <babel | babylon | flow>', 'jscodeshift parser')
    .option('-t --type <type>', 'Add Storybook for a specific project type')
    .action(options => initiate(options, pkg));

  program.command('*', { noHelp: true }).action(cmd => {
    logger.error('Invalid command: %s.\nSee --help for a list of available commands.', cmd);
    process.exit(1);
  });

  program.version(pkg.version).parse(process.argv);

  if (!program.args.length) {
    program.help();
  }
}