JVLink MCP Server

Instructions

Implementation Reference

• src/jvlink_mcp_server/server.py:687-692 (handler)

  The 'check_update' MCP tool handler. It calls 'check_for_updates' and returns the update information.

  def check_update() -> dict:
      """サーバーの最新バージョンを確認する。アップデートがあるか確認します。"""
      info = check_for_updates()
      if info is None:
          return {"error": "アップデートの確認に失敗しました。ネットワーク接続を確認してください。"}
      return info

• src/jvlink_mcp_server/updater.py:66-125 (helper)

  The implementation of 'check_for_updates' which interacts with the GitHub API to check for new releases or tags.

  def check_for_updates() -> Optional[dict]:
      """Check GitHub for latest release.
  
      Returns dict with latest_version, current_version, update_available, html_url
      or None on failure.
      """
      import urllib.request
      import urllib.error
  
      current = get_current_version()
  
      # Try releases/latest first
      try:
          url = f"{GITHUB_API_URL}/releases/latest"
          req = urllib.request.Request(
              url,
              headers={"Accept": "application/vnd.github.v3+json", "User-Agent": GITHUB_REPO},
          )
          with urllib.request.urlopen(req, timeout=10) as resp:
              data = json.loads(resp.read().decode("utf-8"))
              latest = data.get("tag_name", "unknown")
              return {
                  "latest_version": latest,
                  "current_version": current,
                  "update_available": _version_newer(latest, current),
                  "html_url": data.get("html_url", ""),
                  "release_name": data.get("name", ""),
                  "body": data.get("body", ""),
              }
      except urllib.error.HTTPError as e:
          if e.code != 404:
              logger.debug("GitHub API error: %s", e.code)
              return None
      except Exception as e:
          logger.debug("Failed to check releases: %s", e)
          return None
  
      # Fallback: check tags
      try:
          url = f"{GITHUB_API_URL}/tags?per_page=1"
          req = urllib.request.Request(
              url,
              headers={"Accept": "application/vnd.github.v3+json", "User-Agent": GITHUB_REPO},
          )
          with urllib.request.urlopen(req, timeout=10) as resp:
              data = json.loads(resp.read().decode("utf-8"))
              if data:
                  latest = data[0].get("name", "unknown")
                  return {
                      "latest_version": latest,
                      "current_version": current,
                      "update_available": _version_newer(latest, current),
                      "html_url": f"https://github.com/{GITHUB_OWNER}/{GITHUB_REPO}/releases",
                      "release_name": "",
                      "body": "",
                  }
      except Exception as e:
          logger.debug("Failed to check tags: %s", e)
  
      return None