mirror of
https://github.com/ahmetb/kubectx.git
synced 2025-08-23 17:38:29 +00:00
87 lines
2.2 KiB
Go
87 lines
2.2 KiB
Go
// Copyright 2021 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package kubeconfig
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import (
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"github.com/pkg/errors"
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"gopkg.in/yaml.v3"
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)
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func (k *Kubeconfig) contextsNode() (*yaml.Node, error) {
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contexts := valueOf(k.rootNode, "contexts")
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if contexts == nil {
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return nil, errors.New("\"contexts\" entry is nil")
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} else if contexts.Kind != yaml.SequenceNode {
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return nil, errors.New("\"contexts\" is not a sequence node")
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}
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return contexts, nil
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}
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func (k *Kubeconfig) contextNode(name string) (*yaml.Node, error) {
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contexts, err := k.contextsNode()
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if err != nil {
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return nil, err
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}
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for _, contextNode := range contexts.Content {
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nameNode := valueOf(contextNode, "name")
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if nameNode.Kind == yaml.ScalarNode && nameNode.Value == name {
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return contextNode, nil
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}
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}
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return nil, errors.Errorf("context with name \"%s\" not found", name)
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}
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func (k *Kubeconfig) ContextNames() []string {
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contexts := valueOf(k.rootNode, "contexts")
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if contexts == nil {
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return nil
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}
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if contexts.Kind != yaml.SequenceNode {
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return nil
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}
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var ctxNames []string
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for _, ctx := range contexts.Content {
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nameVal := valueOf(ctx, "name")
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if nameVal != nil {
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ctxNames = append(ctxNames, nameVal.Value)
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}
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}
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return ctxNames
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}
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func (k *Kubeconfig) ContextExists(name string) bool {
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ctxNames := k.ContextNames()
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for _, v := range ctxNames {
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if v == name {
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return true
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}
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}
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return false
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}
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func valueOf(mapNode *yaml.Node, key string) *yaml.Node {
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if mapNode.Kind != yaml.MappingNode {
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return nil
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}
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for i, ch := range mapNode.Content {
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if i%2 == 0 && ch.Kind == yaml.ScalarNode && ch.Value == key {
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return mapNode.Content[i+1]
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}
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}
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return nil
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}
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