func findMasterPlugin()

in pkg/cni/conf/confmanager.go [302:327]

• 24 lines of code
• 9 McCabe index (conditional complexity)

func findMasterPlugin(cniConfDir, cniConfFile string) (string, error) {
	var confFiles []string
	files, err := os.ReadDir(cniConfDir)
	if err != nil {
		return "", fmt.Errorf("failed to read cni config directory: %w", err)
	}

	for _, file := range files {
		if !file.Type().IsRegular() {
			continue
		}
		if strings.EqualFold(file.Name(), cniConfFile) {
			continue
		}
		fileExtension := filepath.Ext(file.Name())
		if fileExtension == ".conflist" || fileExtension == ".conf" || fileExtension == ".json" {
			confFiles = append(confFiles, file.Name())
		}
	}

	if len(confFiles) == 0 {
		return "", ErrMainCNINotFound
	}
	sort.Strings(confFiles)
	return filepath.Join(cniConfDir, confFiles[0]), nil
}