Function filterRuntime

lib/util/runtime.js:423–442

(runtime, filter)

 * @returns {boolean | RuntimeSpec} true/false if filter is constant for all runtimes, otherwise runtimes that are active
 */
const filterRuntime = (runtime, filter) => {
	if (runtime === undefined) return filter();
	if (typeof runtime === "string") return filter(runtime);
	let some = false;
	let every = true;
	/** @type {RuntimeSpec} */
	let result;
	for (const r of runtime) {
		const v = filter(r);
		if (v) {
			some = true;
			result = mergeRuntimeOwned(result, r);
		} else {
			every = false;
		}
	}
	if (!some) return false;
	if (every) return true;
	return result;
};

/**
 * Defines the runtime spec map inner map type used by this module.