Currently, command line completion is not pre-installed in any installation method. You need to do it manually.
Source this this script from your ~/.bashrc
or put it into your completions directory.
There is currently only a bash completion script. But you can use it in zsh also.
Add below lines to your ~/.zshrc
file (before you source the bash completion script).
autoload bashcompinit
bashcompinit
Then source the bash completion script.