Node function to verify if a file exists

fileExists.ts

import { promisify } from 'util';

export async function fileExists(path: string): Promise<boolean> {
  try {
    await promisify(access)(path);
    return true;
  } catch (err) {
    if (isAccessError(err) && err.code === 'ENOENT') {
      return false;
    }

    throw err;
  }

  type accessError = unknown & {
    code: string;
  };

  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  function isAccessError(value: any): value is accessError {
    return value?.error && typeof value.error === 'string';
  }
}