fish_right_prompt.fish

function fish_right_prompt
	set -l delay
	set -l now (date +%s)
	if set -q __fish_last_prompt
		set -g dur (math $now - $__fish_last_prompt)
		if test $dur -lt 120
			set delay (printf '%ds' $dur)
		else if test $dur -lt 3600
			set delay (printf '%d:%02d' (math "floor($dur / 60)") (math "$dur % 60"))
		else
			set delay (printf '%d:%02d:%02d' (math "floor($dur / 3600)") (math "floor(($dur % 3600) / 60)") (math "$dur % 60"))
		end
	end
	set -g __fish_last_prompt $now
	printf '%s%s %s %s%s' (set_color blue) $delay $status (date +%H:%M) (set_color normal)
end

in ~/.config/fish/functions/