-
Notifications
You must be signed in to change notification settings - Fork 13
/
labelselector.go
51 lines (44 loc) · 1.46 KB
/
labelselector.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
package utils
import (
"github.com/go-logr/logr"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/selection"
)
// ConvertLabelSelector converts a "k8s.io/apimachinery/pkg/apis/meta/v1".LabelSelector as found in manifests spec section into a "k8s.io/apimachinery/pkg/labels".Selector to be used to filter list operations.
func ConvertLabelSelector(logger logr.Logger, inSelector *metav1.LabelSelector) (labels.Selector, error) {
outSelector := labels.NewSelector()
if inSelector != nil {
for key, value := range inSelector.MatchLabels {
req, err := labels.NewRequirement(key, selection.In, []string{value})
if err != nil {
logger.Error(err, "NewRequirement")
return outSelector, err
}
outSelector = outSelector.Add(*req)
}
for _, expr := range inSelector.MatchExpressions {
var op selection.Operator
switch expr.Operator {
case metav1.LabelSelectorOpIn:
op = selection.In
case metav1.LabelSelectorOpNotIn:
op = selection.NotIn
case metav1.LabelSelectorOpExists:
op = selection.Exists
case metav1.LabelSelectorOpDoesNotExist:
op = selection.DoesNotExist
default:
logger.Info("Invalid Operator:", expr.Operator)
continue
}
req, err := labels.NewRequirement(expr.Key, op, expr.Values)
if err != nil {
logger.Error(err, "NewRequirement")
return outSelector, err
}
outSelector = outSelector.Add(*req)
}
}
return outSelector, nil
}