fish prompt(ps1) with kubernetes server ip and namespace

fish_prompt.fish

function fish_prompt --description 'Write out the prompt'
        set laststatus $status
    function _git_branch_name
        echo (git symbolic-ref HEAD ^/dev/null | sed -e 's|^refs/heads/||')
    end
    function _is_git_dirty
        echo (git status -s --ignore-submodules=dirty ^/dev/null)
    end
    function _k8s_cluster
        echo (kubectl config view --minify --output 'jsonpath={..server}' 2>/dev/null | cut -d':' -f2 |cut -d'.' -f4)
    end
    if [ (_git_branch_name) ]
        set -l git_branch (set_color -o blue)(_git_branch_name)
        if [ (_is_git_dirty) ]
            for i in (git branch -qv --no-color | string match -r '\*' | cut -d' ' -f4- | cut -d] -f1 | tr , \n)\
 (git status --porcelain | cut -c 1-2 | uniq)
                switch $i
                    case "*[ahead *"
                        set git_status "$git_status"(set_color red)⬆
                    case "*behind *"
                        set git_status "$git_status"(set_color red)⬇
                    case "."
                        set git_status "$git_status"(set_color green)✚
                    case " D"
                        set git_status "$git_status"(set_color red)✖
                    case "*M*"
                        set git_status "$git_status"(set_color green)✱
                    case "*R*"
                        set git_status "$git_status"(set_color purple)➜
                    case "*U*"
                        set git_status "$git_status"(set_color brown)═
                    case "??"
                        set git_status "$git_status"(set_color red)≠
                end
            end
        else
            set git_status (set_color green):
        end
        set git_info "(git$git_status$git_branch"(set_color white)")"
    end
    set_color -b black
    printf "%s%s-%s" (set_color -o blue) (_k8s_cluster) (kubectl config view --minify --output 'jsonpath={..namespace}' 2>/dev/null)
        printf '%s%s%s%s%s%s%s%s%s%s%s' (set_color -o white) '' (set_color white) ' ' (set_color yellow) (echo $PWD | sed -e "s|^$HOME|~|") (set_color white) $git_info (set_color white) ' ' (set_color white)
    if test $laststatus -eq 0
        printf "%s✔%s%s " (set_color -o green) (set_color white) (set_color normal)
    else
        printf "%s✘%s%s " (set_color -o red) (set_color white) (set_color normal)
    end
end