Method checkpointExists

packages/core/src/core/logger.ts:402–429

(tag: string)

  }

  async checkpointExists(tag: string): Promise<boolean> {
    if (!this.initialized) {
      throw new Error(
        'Logger not initialized. Cannot check for checkpoint existence.',
      );
    }
    let filePath: string | undefined;
    try {
      filePath = await this._getCheckpointPath(tag);
      // We need to check for existence again, because _getCheckpointPath
      // returns a canonical path even if it doesn't exist yet.
      await fs.access(filePath);
      return true;
    } catch (error) {
      const nodeError = error as NodeJS.ErrnoException;
      if (nodeError.code === 'ENOENT') {
        return false; // It truly doesn't exist in either format.
      }
      // A different error occurred.
      console.error(
        `Failed to check checkpoint existence for ${
          filePath ?? `path for tag "${tag}"`
        }:`,
        error,
      );
      throw error;
    }
  }

  close(): void {
    this.initialized = false;