mirror of
https://github.com/ahmetb/kubectx.git
synced 2026-03-18 11:52:24 +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>
63 lines
1.9 KiB
Go
63 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 main
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import (
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"fmt"
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"io"
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"os"
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"path/filepath"
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"strings"
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)
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// HelpOp describes printing help.
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type HelpOp struct{}
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func (_ HelpOp) Run(stdout, _ io.Writer) error {
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return printUsage(stdout)
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}
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func printUsage(out io.Writer) error {
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help := `USAGE:
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%PROG% : list the namespaces in the current context
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%PROG% <NAME> : change the active namespace of current context
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%PROG% <NAME> --force/-f : force change the active namespace of current context (even if it doesn't exist)
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%PROG% - : switch to the previous namespace in this context
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%PROG% -c, --current : show the current namespace
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%PROG% -h,--help : show this message
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%PROG% -u,--unset : unset the namespace choice (set to 'default')
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%PROG% -V,--version : show version`
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// TODO this replace logic is duplicated between this and kubectx
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help = strings.ReplaceAll(help, "%PROG%", selfName())
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_, err := fmt.Fprintf(out, "%s\n", help)
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if err != nil {
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return fmt.Errorf("write error: %w", err)
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}
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return nil
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}
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// selfName guesses how the user invoked the program.
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func selfName() string {
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// TODO this method is duplicated between this and kubectx
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me := filepath.Base(os.Args[0])
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pluginPrefix := "kubectl-"
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if strings.HasPrefix(me, pluginPrefix) {
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return "kubectl " + strings.TrimPrefix(me, pluginPrefix)
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}
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return "kubens"
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}
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