Allow subcommands to handle --help

[arichardsmith]

Currently when handling subcommands using separate meow instances like this:

const bar = argv => {
	const cli = meow({
		argv,
		help: `
		  Usage
		    $ foo bar <input>
	`});
};

const cli = meow(`
	Usage
	  $ foo <command>

	Commands
	  bar
`);

// Check cli.input and handle commands

If the user enters $ foo bar --help they get the help for foo and not foo bar

There's a wrapper called moggie that handles subcommands, but I was thinking we could to add a commands: [commands] option to meow so it doesn't block the --help flag?

Meow could either:

• Not show help if a command is matched, leaving everything else to the user to handle
• Handle the argv filtering and return the matched command and filtered argv

I'm happy to write something and submit a PR.

[angeloashmore]

Running into this issue now. A subcommand implements it's own meow instance with it's own help text. Not using moggie.

Rather than providing a list of commands to meow, since that is a moggie-specific solution, maybe provide a toggle to turn off the automatic --help handler? The programmer could then handle how and when showHelp() is called.

I could submit a PR if necessary. Unless there is a better way to handle this with the existing options in meow or minimist?