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selector.go
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selector.go
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// Copyright 2024 Matrix Origin
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package common
import (
"github.com/go-errors/errors"
recon "github.com/matrixorigin/controller-runtime/pkg/reconciler"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/selection"
"k8s.io/apimachinery/pkg/util/validation/field"
"sigs.k8s.io/controller-runtime/pkg/client"
)
func ListPods(cli recon.KubeClient, opts ...client.ListOption) ([]corev1.Pod, error) {
podList := &corev1.PodList{}
if err := cli.List(podList, opts...); err != nil {
return nil, err
}
return podList.Items, nil
}
func MustAsSelector(ps *metav1.LabelSelector) labels.Selector {
ls, err := metav1.LabelSelectorAsSelector(ps)
if err != nil {
panic(errors.WrapPrefix(err, "impossible path: LabelSelectorAsSelector failed", 0))
}
return ls
}
func MustNewRequirement(key string, op selection.Operator, vals []string, _ ...field.PathOption) labels.Requirement {
r, err := labels.NewRequirement(key, op, vals)
if err != nil {
panic(errors.WrapPrefix(err, "impossible path: new requirement failed", 0))
}
return *r
}
func MustEqual(key string, value string) labels.Requirement {
return MustNewRequirement(key, selection.Equals, []string{value})
}
func MustNotHave(key string) labels.Requirement {
return MustNewRequirement(key, selection.DoesNotExist, []string{})
}