fix: stack size exceed error on purging module cache

src/utils.ts

@@ -1,71 +0,0 @@
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at https://mozilla.org/MPL/2.0/.
- */
-
-import { promises as fs } from "fs";
-import * as path from "path";
-
-/**
- * Recursively walk a directory, returning the files it finds.
- *
- * @param dirPath Path to the directory to walk.
- *
- * @return Generator that yields the files found while walking the directory.
- */
-export const walkDir = async function* (
-    dirPath: string
-): AsyncGenerator<string> {
-    const dirEnts = await fs.readdir(dirPath, { withFileTypes: true });
-    for (const dirEnt of dirEnts) {
-        if (dirEnt.isDirectory()) {
-            yield* walkDir(path.join(dirPath, dirEnt.name));
-        }
-        if (dirEnt.isFile()) {
-            yield path.join(dirPath, dirEnt.name);
-        }
-    }
-};
-
-/**
- * Purge cached versions of a node module and all of its dependencies from the
- * global require cache, ensuring that future imports reload the module from
- * disk.
- *
- * @param modName Name of the module to purge from the require cache.
- */
-export const purgeModuleAndDepsFromCache = (modName: string): void => {
-    const modPath = require.resolve(modName);
-    if (modPath == null) {
-        return;
-    }
-    const mod = require.cache[modPath];
-    if (mod == null) {
-        return;
-    }
-    for (const child of mod.children) {
-        purgeModuleAndDepsFromCache(child.id);
-    }
-    delete require.cache[modPath];
-};
-
-export type Flattenable<T> = Array<T | Flattenable<T>>;
-
-/**
- * Flatten an arbitrarily-deeply nested array into a flat array.
- *
- * @param arr Array to flatten.
- *
- * @return Flattened array.
- */
-export const flatDeep = <T>(arr: Flattenable<T>): T[] => {
-    const flattenedArr: T[] = [];
-    for (const val of arr) {
-        if (Array.isArray(val)) {
-            flattenedArr.push(...flatDeep(val));
-        } else {
-            flattenedArr.push(val);
-        }
-    }
-    return flattenedArr;
-};