references-empty-enum.js

const ensure = require("@commitlint/ensure");
const message = require("@commitlint/message");

module.exports = function (parsed, when = "never", value) {
    const { references, type } = parsed;

    if (!type || !ensure.enum(type, value)) {
        return [true];
    }

    const negated = when === "always";
    const empty = references.length === 0;

    return [
        negated ? empty : !empty,
        message(["references", negated ? "must" : "must not", `be empty when type is one of [${value.join(", ")}]`])
    ];
};