Fish config which I put on my servers. Beautiful and requires nothing.

config.fish

# 
# Functions
# 

function i
    hostname -I | cut -d " " -f 1
end

function ut
    sudo sh -c "timedatectl set-timezone Europe/Moscow && /usr/sbin/ntpdate pool.ntp.org"
end

function ll
    ls -alah
end

function fuck
    git update-index --assume-unchanged
end

function unfuck
    git update-index --no-assume-unchanged
end

#
# Fish-related
#

function fish_greeting
end

function fish_prompt -d "Write out the prompt"
    set laststatus $status
    printf '%s%s@%s%s ' (set_color green) $USER (i) (set_color normal)
    printf '%s%s%s ' (set_color blue) (prompt_pwd) (set_color normal)
    if test -d .git
        printf '%s %s%s ' (set_color magenta) (git rev-parse --symbolic-full-name @{upstream} | cut -d "/" -f 3,4 2> /dev/null) (set_color normal)
    end
    printf '%s%s%s\n' (set_color normal) (date +"%T") (set_color normal)
    if test $laststatus -eq 0
        printf '%s%s%s ' (set_color blue)  (set_color normal)
    else
        printf '%s%s%s ' (set_color red)  (set_color normal)
    end
    printf '%s%s%s ' (set_color normal)  (set_color normal)
end

fish_variables

# This file contains fish universal variable definitions.
# VERSION: 3.0
SETUVAR __fish_initialized:3100
SETUVAR fish_color_autosuggestion:555\x1ebrblack
SETUVAR fish_color_cancel:\x2dr
SETUVAR fish_color_command:white
SETUVAR fish_color_comment:brblack
SETUVAR fish_color_cwd:green
SETUVAR fish_color_cwd_root:red
SETUVAR fish_color_end:cyan
SETUVAR fish_color_error:white
SETUVAR fish_color_escape:cyan
SETUVAR fish_color_history_current:\x2d\x2dbold
SETUVAR fish_color_host:normal
SETUVAR fish_color_host_remote:yellow
SETUVAR fish_color_normal:normal
SETUVAR fish_color_operator:cyan
SETUVAR fish_color_param:blue
SETUVAR fish_color_quote:green
SETUVAR fish_color_redirection:blue
SETUVAR fish_color_search_match:bryellow\x1e\x2d\x2dbackground\x3dbrblack
SETUVAR fish_color_selection:white\x1e\x2d\x2dbold\x1e\x2d\x2dbackground\x3dbrblack
SETUVAR fish_color_status:red
SETUVAR fish_color_user:brgreen
SETUVAR fish_color_valid_path:\x2d\x2dunderline
SETUVAR fish_key_bindings:fish_default_key_bindings
SETUVAR fish_pager_color_completion:\x1d
SETUVAR fish_pager_color_description:B3A06D\x1eyellow
SETUVAR fish_pager_color_prefix:white\x1e\x2d\x2dbold\x1e\x2d\x2dunderline
SETUVAR fish_pager_color_progress:brwhite\x1e\x2d\x2dbackground\x3dcyan