Method appendFileSync

lib/internal/vfs/provider.js:339–350

* Appends to a file synchronously. * @param {string} path The file path * @param {Buffer|string} data The data to append * @param {object} [options] Options

(path, data, options)

   * @param {object} [options] Options
   */
  appendFileSync(path, data, options) {
    if (this.readonly) {
      throw createEROFS('open', path);
    }
    const flag = options?.flag ?? 'a';
    const handle = this.openSync(path, flag, options?.mode);
    try {
      handle.writeFileSync(data, options);
    } finally {
      handle.closeSync();
    }
  }

  /**
   * Checks if a path exists.