Function setNested

cli/parse_args.ts:447–474

(
  object: NestedMapping,
  keys: string[],
  value: unknown,
  collect = false,
)

}

function setNested(
  object: NestedMapping,
  keys: string[],
  value: unknown,
  collect = false,
) {
  keys = [...keys];
  const key = keys.pop()!;

  for (const k of keys) {
    if (isConstructorOrProto(object, k)) return;
    object = (object[k] ??= {}) as NestedMapping;
  }

  if (isConstructorOrProto(object, key)) return;

  if (collect) {
    const v = object[key];
    if (Array.isArray(v)) {
      v.push(value);
      return;
    }

    value = v ? [v, value] : [value];
  }

  object[key] = value;
}

function hasNested(object: NestedMapping, keys: string[]): boolean {
  for (const key of keys) {