mirror of
https://github.com/ahmetb/kubectx.git
synced 2026-03-18 03:42:12 +00:00
0d800e1367
This change addresses eight key improvements to the kubectx/kubens codebase: Resource Management Fixes: - Fix use-after-close bugs where Kubeconfig was accessed after Close() - Fix resource leaks on error paths by ensuring defer kc.Close() is called - Fix YAML encoder not being closed after Encode(), causing buffered data loss API Design Improvements: - Change ContextNames() to return ([]string, error) instead of silently returning nil on error, making parse failures distinguishable from empty results - Change GetCurrentContext() to return (string, error) instead of returning "" for both "not set" and parse error cases - Update all 16 call sites across cmd/kubectx and cmd/kubens packages to handle the new error returns while preserving backward-compatible behavior Error Handling: - Add explicit error handling for printer.Success() calls in 5+ locations by prefixing unchecked calls with _ = Performance: - Add slice pre-allocation in namespace list pagination using slices.Grow() before append loops, reducing allocations when fetching 500+ item batches All changes maintain backward compatibility for missing kubeconfig keys while improving error transparency and resource safety.
95 lines
2.1 KiB
Go
95 lines
2.1 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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"errors"
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"fmt"
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"io"
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"sigs.k8s.io/kustomize/kyaml/yaml"
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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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config *yaml.RNode
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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 fmt.Errorf("failed to load: %w", err)
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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 fmt.Errorf("failed to decode: %w", err)
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}
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k.config = yaml.NewRNode(&v)
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if k.config.YNode().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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str, err := k.config.String()
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if err != nil {
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return nil, err
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}
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return []byte(str), nil
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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 fmt.Errorf("failed to reset file: %w", err)
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}
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enc := yaml.NewEncoder(k.f)
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enc.SetIndent(0)
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if err := enc.Encode(k.config.YNode()); err != nil {
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return err
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}
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return enc.Close()
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}
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