web-ext-run/lib/util/file-exists.js

A tool to open and run web extensions

import fs from 'fs/promises';
import { isErrorWithCode } from '../errors.js';

/*
 * Resolves true if the path is a readable file.
 *
 * Usage:
 *
 * const exists = await fileExists(filePath);
 * if (exists) {
 *   // ...
 * }
 *
 * */
export default async function fileExists(path, {
  fileIsReadable = f => fs.access(f, fs.constants.R_OK)
} = {}) {
  try {
    await fileIsReadable(path);
    const stat = await fs.stat(path);
    return stat.isFile();
  } catch (error) {
    if (isErrorWithCode(['EACCES', 'ENOENT'], error)) {
      return false;
    }
    throw error;
  }
}
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