mirror of
https://github.com/ahmetb/kubectx.git
synced 2026-03-18 20:02:49 +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.
62 lines
1.7 KiB
Go
62 lines
1.7 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 main
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import (
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"errors"
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"fmt"
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"io"
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"github.com/ahmetb/kubectx/internal/kubeconfig"
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"github.com/ahmetb/kubectx/internal/printer"
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)
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// UnsetOp indicates intention to remove current namespace preference.
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type UnsetOp struct{}
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func (_ UnsetOp) Run(_, stderr io.Writer) error {
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kc := new(kubeconfig.Kubeconfig).WithLoader(kubeconfig.DefaultLoader)
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defer kc.Close()
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if err := kc.Parse(); err != nil {
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return fmt.Errorf("kubeconfig error: %w", err)
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}
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ns, err := clearNamespace(kc)
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if err != nil {
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return err
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}
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err = printer.Success(stderr, "Active namespace is \"%s\".", printer.SuccessColor.Sprint(ns))
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return err
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}
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func clearNamespace(kc *kubeconfig.Kubeconfig) (string, error) {
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ctx, err := kc.GetCurrentContext()
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if err != nil {
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return "", fmt.Errorf("failed to get current context: %w", err)
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}
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ns := "default"
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if ctx == "" {
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return "", errors.New("current-context is not set")
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}
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if err := kc.SetNamespace(ctx, ns); err != nil {
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return "", fmt.Errorf("failed to clear namespace: %w", err)
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}
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if err := kc.Save(); err != nil {
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return "", fmt.Errorf("failed to save kubeconfig file: %w", err)
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}
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return ns, nil
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}
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