index.js

import { createRequire } from "node:module";
import Path from "node:path";

import { globSync } from "glob";

const require = createRequire(import.meta.url);

export default {
	utils: { getPackages },
	rules: {
		"scope-enum": (ctx) =>
			getPackages(ctx).then((packages) => [2, "always", packages]),
	},
};

function getPackages(context) {
	return Promise.resolve()
		.then(() => {
			const ctx = context || {};
			const cwd = ctx.cwd || process.cwd();

			const { workspaces } = require(Path.join(cwd, "package.json"));
			if (!Array.isArray(workspaces)) {
				// no workspaces configured, skipping
				return [];
			}

			const wsGlobs = workspaces.flatMap((ws) => {
				const path = Path.posix.join(ws, "package.json");
				return globSync(path, { cwd, ignore: ["**/node_modules/**"] });
			});

			return wsGlobs.sort().map((pJson) => require(Path.join(cwd, pJson)));
		})
		.then((packages) => {
			return packages
				.map((pkg) => pkg.name)
				.filter(Boolean)
				.map((name) => (name.charAt(0) === "@" ? name.split("/")[1] : name));
		});
}