mirror of
https://github.com/ahmetb/kubectx.git
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4c9e8fb81e
Spawns an isolated sub-shell with a minimal kubeconfig containing only the specified context. This allows the user to launch a shell where they can only interact with a single cluster without having to worry about a command or an LLM agent interacting with other contexts. Inside the isolated shell, most context switching/editing operations on kubectx are blocked. Nested shells not allowed. Fixes #12. Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
65 lines
2.1 KiB
Go
65 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 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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"github.com/pkg/errors"
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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 contexts
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%PROG% <NAME> : switch to context <NAME>
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%PROG% - : switch to the previous context
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%PROG% -c, --current : show the current context name
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%PROG% <NEW_NAME>=<NAME> : rename context <NAME> to <NEW_NAME>
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%PROG% <NEW_NAME>=. : rename current-context to <NEW_NAME>
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%PROG% -u, --unset : unset the current context
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%PROG% -d <NAME> [<NAME...>] : delete context <NAME> ('.' for current-context)
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%SPAC% (this command won't delete the user/cluster entry
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%SPAC% referenced by the context entry)
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%PROG% -s, --shell <NAME> : start a shell scoped to context <NAME>
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%PROG% -h,--help : show this message
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%PROG% -V,--version : show version`
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help = strings.ReplaceAll(help, "%PROG%", selfName())
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help = strings.ReplaceAll(help, "%SPAC%", strings.Repeat(" ", len(selfName())))
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_, err := fmt.Fprintf(out, "%s\n", help)
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return errors.Wrap(err, "write error")
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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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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 "kubectx"
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}
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