Add support for executable subcommands with help flags differing from those of the parent command

[aweebit]

Disclaimer: The change introduced here is of low importance.

This PR builds upon the already approved #1930.

Diff only for the change introduced by this PR:
aweebit/commander.js@feature/fixes...feature/help-command-executable-help-flags

Problem

Currently, help commands don't have support for executable subcommands whose help flags differ from those of the parent command.

Such support could be useful especially when third-party executables are used.

Solution

Get help flags to pass to an executable subcommand from the subcommand instance rather than the parent instance in ._dispatchHelpCommand().

Make it possible to set custom flags for such a subcommand instance by including helpFlags in the options passed to .command().

// program.js
const { Command } = require('commander');

const program = new Command();
program.command('executable', 'description', {
  helpFlags: '-c, --custom-help'
});
program.parse();

// program-executable.js
const { Command } = require('commander');

const program = new Command()
  .helpOption('-c, --custom-help');
program.parse();

node program help executable

ChangeLog

Added

• support for executable subcommands with help flags differing from those of the parent command (must be specified in the helpFlags option when calling .command())

[shadowspawn]

I like the concept, but so low value and you have so many other PR that closing.

May never come up in the real world!