kubectl plugin-completion

TL;DR

Requires PR 105867

Plugin that generates shell completion scripts for over half the kubectl plugins.

$ kubectl krew install --manifest-url https://raw.githubusercontent.com/marckhouzam/kubectl-plugin_completion/v0.1.0/plugin-completion.yaml

$ kubectl plugin-completion generate
$ export PATH=$PATH:$HOME/.kubectl-plugin-completion

What

There is an ongoing effort to add support for shell completion for kubectl plugins. Please see kubernetes/kubernetes#105867 for details. If merged, it will be possible for any kubectl plugin to provide shell completion. However, each plugin will need to provide the necessary script itself; this will take time.

Until this happens, the plugin-completion plugin automatically generates the required shell completion scripts when possible, for the currently installed plugins.

Installation

This plugin is not (yet?) available on the Krew index, but can still be installed with Krew.

1. Install the plugin: kubectl krew install --manifest-url https://raw.githubusercontent.com/marckhouzam/kubectl-plugin_completion/v0.1.0/plugin-completion.yaml
2. Add the $HOME/.kubectl-plugin-completion directory at the end of your $PATH variable

Usage

Generate the scripts

kubectl plugin-completion generate

will generate completion scripts for all installed plugins that are supported. Once done, you will be able to do use shell completion with your plugins. For example:

$ kubectl plugin-completion generate
Shell completion for plugin 'krew' has been generated.
Shell completion for plugin 'plugin_completion' has been generated.

$ kubectl plugin-completion [tab][tab]
clean      generate   list       supported

$ kubectl krew [tab][tab]
completion  help        index       info        install     list        search      uninstall   update      upgrade     version

After running this command, the plugin-completion plugin itself will have shell completion enabled.

Note: Whenever you install a new plugin you will need to run the generate command again.

Cleanup

kubectl plugin-completion clean

will remove all generated completion scripts.

List

kubectl plugin-completion list

will list the currently installed plugins for which a completion script has been generated.

Supported plugins

kubectl plugin-completion supported

will list the installed plugins for which a shell completion script can be generated.

How

The plugin takes advantage of the fact that over 50% of plugins registered with krew use the Cobra library, which automatically supports shell completion. This plugin therefore automatically generates a shell completion script that uses Cobra's functionality.

You can find the generated scripts under $HOME/.kubectl-plugin-completion.