mirror of
https://github.com/ahmetb/kubectx.git
synced 2026-03-18 03:42:12 +00:00
860e09775b
Modernize the codebase to use idiomatic Go 1.25 patterns, removing deprecated APIs and reducing external dependencies.
- Replace deprecated `io/ioutil` with `os.ReadFile`, `os.WriteFile`, `os.MkdirTemp`, `os.CreateTemp`
- Replace `interface{}` with `any` (Go 1.18+)
- Remove `github.com/pkg/errors` dependency entirely, using stdlib `fmt.Errorf` with `%w` and `errors.New`
- Use `errors.As()` instead of direct type assertions on error values
- Use `strings.Cut()` for delimiter parsing instead of `strings.Split` + length check
- Use `slices.Contains()` for linear search in `ContextExists()`
- Use `t.Setenv()` and `t.TempDir()` in tests instead of manual env save/restore and temp dir cleanup
- Delete unused `internal/testutil/tempfile.go` helper
- Update GitHub Actions CI and release workflows from Go 1.22 to 1.25
Net result: -70 lines, 1 fewer external dependency.
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
80 lines
2.2 KiB
Go
80 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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"errors"
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"fmt"
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"os"
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"path/filepath"
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"github.com/ahmetb/kubectx/internal/cmdutil"
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)
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var (
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DefaultLoader Loader = new(StandardKubeconfigLoader)
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)
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type StandardKubeconfigLoader struct{}
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type kubeconfigFile struct{ *os.File }
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func (*StandardKubeconfigLoader) Load() ([]ReadWriteResetCloser, error) {
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cfgPath, err := kubeconfigPath()
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if err != nil {
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return nil, fmt.Errorf("cannot determine kubeconfig path: %w", err)
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}
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f, err := os.OpenFile(cfgPath, os.O_RDWR, 0)
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if err != nil {
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if os.IsNotExist(err) {
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return nil, fmt.Errorf("kubeconfig file not found: %w", err)
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}
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return nil, fmt.Errorf("failed to open file: %w", err)
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}
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// TODO we'll return all kubeconfig files when we start implementing multiple kubeconfig support
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return []ReadWriteResetCloser{ReadWriteResetCloser(&kubeconfigFile{f})}, nil
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}
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func (kf *kubeconfigFile) Reset() error {
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if err := kf.Truncate(0); err != nil {
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return fmt.Errorf("failed to truncate file: %w", err)
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}
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if _, err := kf.Seek(0, 0); err != nil {
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return fmt.Errorf("failed to seek in file: %w", err)
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}
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return nil
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}
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func kubeconfigPath() (string, error) {
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// KUBECONFIG env var
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if v := os.Getenv("KUBECONFIG"); v != "" {
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list := filepath.SplitList(v)
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if len(list) > 1 {
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// TODO KUBECONFIG=file1:file2 currently not supported
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return "", errors.New("multiple files in KUBECONFIG are currently not supported")
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}
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return v, nil
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}
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// default path
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home := cmdutil.HomeDir()
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if home == "" {
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return "", errors.New("HOME or USERPROFILE environment variable not set")
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}
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return filepath.Join(home, ".kube", "config"), nil
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}
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