yii2/contrib/completion/zsh/_yii

#compdef yii

_yii() {
    local state command lastArgument commands options executive
    lastArgument=${words[${#words[@]}]}
    prevArgument=${words[${#words[@]}-1]}
    executive=$words[1]

    # lookup for command
    for word in ${words[@]:1}; do
        if [[ $word != -* ]]; then
            command=$word
            break
        fi
    done


    [[ $lastArgument == $command ]] && state="command"
    [[ $lastArgument != $command ]] && state="option"
    [[ $prevArgument == "help" ]] && state="help"

    case $state in
        command|help)
            commands=("${(@f)$(${executive} help/list 2>/dev/null)}")
            _describe 'command' commands
        ;;
        option)
            options=("${(@f)$(${executive} help/usage ${command} 2>/dev/null)}")
            _message -r "$options"

            suboptions=("${(@f)$(${executive} help/list-action-options ${command} 2>/dev/null)}")
            _describe -V -o -t suboption 'action options' suboptions
        ;;
        *)
    esac

}

compdef _yii yii