cli.js

var opts = {
  log: require('./logger'),
  fs: require('./fs')
};

var someCommand(
  name('something'),
  use(function (data, flags, options) {
    options.log('hey!');
    options.fs.write('something');
  });
);

var run = cli(
  options(opts) // these are global options to all commands and flags
  someCommand(/* command specific options here */)
);

// Note: global options and local options get merged

run(process.argv.slice(2));