cli.js

#!/usr/bin/env node

const { existsSync, readFileSync } = require("node:fs");
const { resolve } = require("node:path");
const { convertPack } = require(".");

const args = require("minimist")(process.argv.slice(2), {
	alias: {
		"input-version": ["iv"],
		"output-version": ["ov"],
		"input-edition": ["ie"],
		"output-edition": ["oe"],
		verbose: ["v"],
		help: ["h"],
	},
	boolean: ["verbose", "help"],
});

if (args.help) {
	const manPage = readFileSync(resolve(__dirname, "./convert-pack.1"), { encoding: "utf8" });
	// very quick solution to support man pages and a help menu with the same file
	const helpPage = manPage.replace(/\n\.br\n/g, "\n");
	console.log(helpPage);
	process.exit();
}

if (!Object.groupBy || typeof Object.groupBy !== "function") {
	console.error(`You need a newer version of Node.js to run this program! (>=21.0)`);
	process.exit(1);
}

const options = {
	inputDir: args._?.[0],
	outputDir: args._?.[1],
	inputEdition: args.ie,
	outputEdition: args.oe,
	inputVersion: args.iv,
	outputVersion: args.ov,
	verbose: args.verbose,
};

// validation stuff
if (!args._?.[0]) {
	console.error("No input folder path specified!");
	process.exit(1);
}

if (!existsSync(args._[0])) {
	console.error(`Input folder doesn't exist! (received "${args._[0]}")`);
	process.exit(1);
}

if (!args._?.[1]) {
	console.error("No output folder path specified!");
	process.exit(1);
}

if (!options.inputEdition && !options.inputVersion) {
	console.error(
		"Not enough input information provided! (edition or version required at minimum)",
	);
	process.exit(1);
}

if (!options.outputEdition && !options.outputVersion) {
	console.error(
		"Not enough output information provided! (edition or version required at minimum)",
	);
	process.exit(1);
}

(async () => {
	// falls back to latest if not specified (don't make unnecessary fetch)
	if (options.inputVersion || options.outputVersion) {
		const versions = await fetch("https://api.faithfulpack.net/v2/versions/list").then((res) =>
			res.json(),
		);

		// "latest" is a macro to the latest version for the given edition
		versions.unshift("latest");

		if (!versions.includes(options.inputVersion)) {
			console.error(`Unknown input version (received ${options.inputVersion})!`);
			console.error(`Available versions:\n- ${versions.join("\n- ")}`);
			process.exit(1);
		}

		if (!versions.includes(options.outputVersion)) {
			console.error(`Unknown input version (received ${options.inputVersion})!`);
			console.error(`Available versions:\n- ${versions.join("\n- ")}`);
			process.exit(1);
		}
	}
	await convertPack(options);

	// sometimes iifes have issues with exiting correctly
	process.exit(0);
})();