mirror of
https://github.com/ahmetb/kubectx.git
synced 2025-08-23 17:38:29 +00:00
87 lines
1.9 KiB
Go
87 lines
1.9 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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"io"
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"github.com/pkg/errors"
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"gopkg.in/yaml.v3"
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)
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type ReadWriteResetCloser interface {
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io.ReadWriteCloser
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// Reset truncates the file and seeks to the beginning of the file.
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Reset() error
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}
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type Loader interface {
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Load() ([]ReadWriteResetCloser, error)
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}
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type Kubeconfig struct {
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loader Loader
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f ReadWriteResetCloser
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rootNode *yaml.Node
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}
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func (k *Kubeconfig) WithLoader(l Loader) *Kubeconfig {
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k.loader = l
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return k
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}
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func (k *Kubeconfig) Close() error {
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if k.f == nil {
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return nil
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}
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return k.f.Close()
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}
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func (k *Kubeconfig) Parse() error {
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files, err := k.loader.Load()
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if err != nil {
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return errors.Wrap(err, "failed to load")
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}
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// TODO since we don't support multiple kubeconfig files at the moment, there's just 1 file
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f := files[0]
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k.f = f
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var v yaml.Node
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if err := yaml.NewDecoder(f).Decode(&v); err != nil {
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return errors.Wrap(err, "failed to decode")
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}
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k.rootNode = v.Content[0]
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if k.rootNode.Kind != yaml.MappingNode {
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return errors.New("kubeconfig file is not a map document")
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}
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return nil
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}
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func (k *Kubeconfig) Bytes() ([]byte, error) {
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return yaml.Marshal(k.rootNode)
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}
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func (k *Kubeconfig) Save() error {
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if err := k.f.Reset(); err != nil {
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return errors.Wrap(err, "failed to reset file")
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}
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enc := yaml.NewEncoder(k.f)
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enc.SetIndent(0)
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return enc.Encode(k.rootNode)
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}
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