Bash auto-completion on Linux

Introduction

The karmadactl completion script for Bash can be generated with the command karmadactl completion bash. Sourcing the completion script in your shell enables karmadactl autocompletion.

However, the completion script depends on bash-completion, which means that you have to install this software first (you can test if you have bash-completion already installed by running type _init_completion).

Install bash-completion

bash-completion is provided by many package managers (see here). You can install it with apt-get install bash-completion or yum install bash-completion, etc.

The above commands create /usr/share/bash-completion/bash_completion, which is the main script of bash-completion. Depending on your package manager, you have to manually source this file in your ~/.bashrc file.

source /usr/share/bash-completion/bash_completion

Reload your shell and verify that bash-completion is correctly installed by typing type _init_completion.

Enable karmadactl autocompletion

You now need to ensure that the karmadactl completion script gets sourced in all your shell sessions. There are two ways in which you can do this:

• Source the completion script in your ~/.bashrc file:

echo 'source <(karmadactl completion bash)' >>~/.bashrc

• Add the completion script to the /etc/bash_completion.d directory:

karmadactl completion bash >/etc/bash_completion.d/karmadactl

If you have an alias for karmadactl, you can extend shell completion to work with that alias:

echo 'alias km=karmadactl' >>~/.bashrc
echo 'complete -F __start_karmadactl km' >>~/.bashrc

Note: bash-completion sources all completion scripts in /etc/bash_completion.d.

Both approaches are equivalent. After reloading your shell, karmadactl autocompletion should be working.

Enable kubectl-karmada autocompletion

Currently, kubectl plugins do not support autocomplete, but it is already planned in Command line completion for kubectl plugins.

We will update the documentation as soon as it does.