Walk A Directory Recursively Using an Async Generator

walk.ts

import * as fs from "fs/promises";
import * as path from "path";

export async function exists(path: string): Promise<boolean> {
  return fs
    .access(path, fs.constants.F_OK)
    .then(() => true)
    .catch(() => false);
}

export async function* walkFilesRecursively(
  p: string
): AsyncGenerator<string, void, void> {
  if (!(await exists(p))) return;

  const stats = await fs.stat(p);

  if (stats.isDirectory()) {
    for (const dirent of await fs.readdir(p, { withFileTypes: true })) {
      for await (const result of walkFilesRecursively(
        path.join(dirent.path, dirent.name)
      )) {
        yield result;
      }
    }
  } else if (stats.isFile()) {
    yield p;
  }
}