nestedCommands.js

#!/usr/bin/env node

const commander = require('commander');
const program = new commander.Command();

// Commander supports nested subcommands.
// .command() can add a subcommand with an action handler or an executable.
// .addCommand() adds a prepared command with an action handler.

// Add nested commands using `.command()`.
const brew = program.command('brew');
brew.command('tea').action(() => {
  console.log('brew tea');
});
brew.command('coffee').action(() => {
  console.log('brew coffee');
});

// Add nested commands using `.addCommand().
// The command could be created separately in another module.
function makeHeatCommand() {
  const heat = new commander.Command('heat');
  heat.command('jug').action(() => {
    console.log('heat jug');
  });
  heat.command('pot').action(() => {
    console.log('heat pot');
  });
  return heat;
}
program.addCommand(makeHeatCommand());

program.parse(process.argv);

// Try the following:
//    node nestedCommands.js brew tea
//    node nestedCommands.js heat jug