mirror of
https://github.com/ahmetb/kubectx.git
synced 2025-06-18 19:58:05 +00:00
45 lines
1.1 KiB
Go
45 lines
1.1 KiB
Go
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 namespaces in the current context
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%PROG% <NAME> : change the active namespace of current context
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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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`
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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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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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// 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 "kubectx"
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}
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