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rOACCT/node_modules/@babel/helpers/scripts/generate-helpers.js
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generate-helpers.js
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			import fs from "fs";
			import { join } from "path";
			import { URL, fileURLToPath } from "url";
			import { minify } from "terser"; // eslint-disable-line import/no-extraneous-dependencies

			const HELPERS_FOLDER = new URL("../src/helpers", import.meta.url);
			const IGNORED_FILES = new Set(["package.json"]);

			export default async function generateHelpers() {
			let output = `/*
			* This file is auto-generated! Do not modify it directly.
			* To re-generate run 'yarn gulp generate-runtime-helpers'
			*/

			import template from "@babel/template";

			function helper(minVersion: string, source: string) {
			return Object.freeze({
			minVersion,
			ast: () => template.program.ast(source, { preserveComments: true }),
			})
			}

			export default Object.freeze({
			`;

			for (const file of (await fs.promises.readdir(HELPERS_FOLDER)).sort()) {
			if (IGNORED_FILES.has(file)) continue;
			if (file.startsWith(".")) continue; // ignore e.g. vim swap files

			const [helperName] = file.split(".");

			const filePath = join(fileURLToPath(HELPERS_FOLDER), file);
			if (!file.endsWith(".js")) {
			console.error("ignoring", filePath);
			continue;
			}

			const fileContents = await fs.promises.readFile(filePath, "utf8");
			const minVersionMatch = fileContents.match(
			/^\s\/\\s@minVersion\s+(?<minVersion>\S+)\s\\/\s$/m
			);
			if (!minVersionMatch) {
			throw new Error(`@minVersion number missing in ${filePath}`);
			}
			const { minVersion } = minVersionMatch.groups;

			const source = await minify(fileContents, {
			mangle: false,
			// The _typeof helper has a custom directive that we must keep
			compress: { directives: false },
			});

			output += `\
			${JSON.stringify(helperName)}: helper(
			${JSON.stringify(minVersion)},
			${JSON.stringify(source.code)},
			),
			`;
			}

			output += "});";
			return output;
			}