func nodeSelectorRequirementsAsSelector()

in scheduling/corev1/nodeaffinity/nodeaffinity.go [205:242]

• 38 lines of code
• 11 McCabe index (conditional complexity)

func nodeSelectorRequirementsAsSelector(nsm []v1.NodeSelectorRequirement, path *field.Path) (labels.Selector, []error) {
	if len(nsm) == 0 {
		return labels.Nothing(), nil
	}
	var errs []error
	selector := labels.NewSelector()
	for i, expr := range nsm {
		p := path.Index(i)
		var op selection.Operator
		switch expr.Operator {
		case v1.NodeSelectorOpIn:
			op = selection.In
		case v1.NodeSelectorOpNotIn:
			op = selection.NotIn
		case v1.NodeSelectorOpExists:
			op = selection.Exists
		case v1.NodeSelectorOpDoesNotExist:
			op = selection.DoesNotExist
		case v1.NodeSelectorOpGt:
			op = selection.GreaterThan
		case v1.NodeSelectorOpLt:
			op = selection.LessThan
		default:
			errs = append(errs, field.NotSupported(p.Child("operator"), expr.Operator, nil))
			continue
		}
		r, err := labels.NewRequirement(expr.Key, op, expr.Values, field.WithPath(p))
		if err != nil {
			errs = append(errs, err)
		} else {
			selector = selector.Add(*r)
		}
	}
	if len(errs) != 0 {
		return nil, errs
	}
	return selector, nil
}