Function fetchLatestVersion

cli/pkg/cmdutil/update.go:111–155

fetchLatestVersion fetches the latest version of Rill from Github releases.

(ctx context.Context)

// fetchLatestVersion fetches the latest version of Rill from Github releases.
func fetchLatestVersion(ctx context.Context) (*githubReleaseInfo, error) {
	req, err := http.NewRequestWithContext(ctx, http.MethodGet, versionCheckURI, http.NoBody)
	if err != nil {
		return nil, err
	}

	req.Header.Set("Content-Type", "application/json; charset=utf-8")
	req.Header.Set("Accept", "application/vnd.github.v3+json")

	getToken := func() string {
		if t := os.Getenv("GH_TOKEN"); t != "" {
			return t
		}
		return os.Getenv("GITHUB_TOKEN")
	}

	if token := getToken(); token != "" {
		req.Header.Set("Authorization", fmt.Sprintf("token %s", token))
	}

	client := &http.Client{Timeout: time.Second * 15}
	resp, err := client.Do(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()

	out, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, err
	}

	success := resp.StatusCode >= 200 && resp.StatusCode < 300
	if !success {
		return nil, fmt.Errorf("error fetching latest release: %s", string(out))
	}

	var info *githubReleaseInfo
	err = json.Unmarshal(out, &info)
	if err != nil {
		return nil, err
	}

	return info, nil
}