func()

in validators/kernel_validator.go [108:174]

• 64 lines of code
• 17 McCabe index (conditional complexity)

func (k *KernelValidator) validateCachedKernelConfig(allConfig map[string]kConfigOption, kSpec KernelSpec) error {
	badConfigs := []string{}
	// reportAndRecord is a helper function to record bad config when
	// report.
	reportAndRecord := func(name, msg, desc string, result ValidationResultType) {
		if result == bad {
			badConfigs = append(badConfigs, name)
		}
		// report description when the config is bad or warn.
		if result != good && desc != "" {
			msg = msg + " - " + desc
		}
		k.Reporter.Report(name, msg, result)
	}
	const (
		required = iota
		optional
		forbidden
	)
	validateOpt := func(config KernelConfig, expect int) {
		var found, missing ValidationResultType
		switch expect {
		case required:
			found, missing = good, bad
		case optional:
			found, missing = good, warn
		case forbidden:
			found, missing = bad, good
		}
		var name string
		var opt kConfigOption
		var ok bool
		for _, name = range append([]string{config.Name}, config.Aliases...) {
			name = kernelConfigPrefix + name
			if opt, ok = allConfig[name]; ok {
				break
			}
		}
		if !ok {
			reportAndRecord(name, "not set", config.Description, missing)
			return
		}
		switch opt {
		case builtIn:
			reportAndRecord(name, "enabled", config.Description, found)
		case asModule:
			reportAndRecord(name, "enabled (as module)", config.Description, found)
		case leftOut:
			reportAndRecord(name, "disabled", config.Description, missing)
		default:
			reportAndRecord(name, fmt.Sprintf("unknown option: %s", opt), config.Description, missing)
		}
	}
	for _, config := range kSpec.Required {
		validateOpt(config, required)
	}
	for _, config := range kSpec.Optional {
		validateOpt(config, optional)
	}
	for _, config := range kSpec.Forbidden {
		validateOpt(config, forbidden)
	}
	if len(badConfigs) > 0 {
		return errors.Errorf("unexpected kernel config: %s", strings.Join(badConfigs, " "))
	}
	return nil
}