#!/usr/bin/env node
"use strict";

// this script ensures that any candidate package referenced as dependency
// within a meta-package matches the reference version

let path = require("path");

let root = path.resolve(__dirname, "..");
let { version } = require(`${root}/package.json`);

let candidates = process.argv.slice(2);
let metaPackages = candidates.slice(1);

metaPackages.forEach(metaPackage => { // NB: excludes main package
	metaPackage = path.basename(metaPackage);
	getDependencyGroups(`${root}/pkg/${metaPackage}`).forEach(dependencies => {
		candidates.forEach(candidate => {
			let versionRange = dependencies[candidate];
			let valid = versionRange === undefined || versionRange === version;
			if(!valid) {
				console.error(`dependency version mismatch: ${metaPackage} requires ` +
						`${candidate} ${versionRange}, expected ${version}`);
				process.exit(1);
			}
		});
	});
});

function getDependencyGroups(directory) {
	let meta = require(`${directory}/package.json`);
	return Object.keys(meta).
		filter(key => /[dD]ependencies$/.test(key)).
		map(section => meta[section]);
}