Build a command line interface using a commander program.

build_cli.js

/**
 * Builds commands and options for a Commander.js program object using an array of command objects.
 * @param {Object[]} commands - An array of command objects, where each object represents a command with its options.
 * @param {string} commands.name - The name of the command.
 * @param {string} commands.description - The description of the command.
 * @param {Object[]} commands.options - An array of option objects for the command.
 * @param {string} commands.options.flags - The flags for the option.
 * @param {string} commands.options.description - The description of the option.
 * @param {function} commands.action - The action function for the command.
 */
const build_cli = (program, commands) => {
	try {
		let usedDefault = false;

		// Loop through the commands and add them to the program.
		for (const command of commands) {
			if (!command.name && usedDefault)
				throw "You cannot set more than one index command.";
			else if (!command.name) usedDefault = true;

			let cmd = (
				command.name ? program.command(command.name) : program
			).description(command.description || "No description provided.");

			// Add all command options.
			if (command.options)
				for (const option of command.options)
					cmd = cmd.option(
						option.flags,
						option.description || "No description provided."
					);

			// Add all command arguments.
			if (command.arguments)
				for (const argument of command.arguments)
					cmd = cmd.argument(
						argument.flags,
						argument.description || "No description provided."
					);

			cmd.action(command.action);
		}
	} catch (err) {
		console.error("ERROR:", err);
		process.exit(1);
	}
};

module.exports = build_cli;