meow-subcommands.js

const meow = require('meow')
const prop = k => o => o[k]
const pipe = (...fns) => x => [...fns].reduce((acc, f) => f(acc), x)

const siconstore = () => ({
    cli: meow(`
        Usage
        $ siconstore [command]

        Available Commands

        $ siconstore publish
        $ siconstore latest
    `),
    action: cli => cli.showHelp(),
})
siconstore.publish = () => ({
    cli: meow(`
        Usage
            $ siconstore publish

        Description
            Uses stdin to publish json to app-store
    `),
    action: cli => {
        console.log(cli.flags)
    }
})

const getSubcommand = (cliObject, level) => pipe(
    prop('input'),
    prop(level),
    name => prop(name)(cliObject),
)(prop('cli')(cliObject()))

const cli = (cliObject, level = 0) => {
    const { cli: nextCli, action } = cliObject()
    const subCommand = getSubcommand(cliObject, level)
    return subCommand ? 
        cli(subCommand, level + 1) :
        nextCli.flags.help ?
            nextCli.showHelp() :
            action(nextCli)
}

cli(siconstore)