setPrompt() {
	if [ "$color_prompt" != yes ]; then
		PROMPT_COMMAND="${PROMPT_COMMAND:+$PROMPT_COMMAND}"
		PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
		return
	fi
	case "$TERM" in
		xterm*|rxvt*)
			;;
		*)
			PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
			return
			;;
	esac
	PROMPT_COMMAND="updatePrompt${PROMPT_COMMAND:+; $PROMPT_COMMAND}"
	PS2="|"
}
updatePrompt() {
	local prev_exit="$?"
	# color_helper_>>color<< (Note: \[\]= escaping)
	local chR="\[\033[1;91m\]"	  #red
	local chW="\[\033[00m\]"	  #white
	local chG="\[\033[01;32m\]"   #green
	local chB="\[\033[0;34m\]"	  #blue
	local chP="\[\033[0;35m\]"	  #purple
	local chY="\[\033[0;33m\]"	  #yellow
	PS1=""
	if [ "$prev_exit" -eq 0 ]; then
		PS1+="$chG✓ $chW"
	else
		PS1+="$chR✗ $chW"
	fi
	local jobs
	jobs="$(jobs -p | wc -w)"
	[ "$jobs" -ne 0 ] && \
		PS1+="${chY}≡$jobs$chW"
	PS1+="${debian_chroot:+($debian_chroot)}"
	PS1+=" At ${chG}\A${chW}"
	PS1+=" by ${chP}\u${chW}"
	sudo -n true 2>/dev/null && \
		PS1+="${chR} (sudo)${chW}"
	PS1+=" in "
	if \git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
		local branch
		branch="$(\git symbolic-ref -q HEAD)"
		PS1+="[${branch#refs/heads/}"
		local status
		status="$(git for-each-ref --format='%(upstream:trackshort)' "$branch" 2>/dev/null | awk '!seen[$1]++ {printf $1}')"
		status+="$(git status --porcelain 2>/dev/null | awk '!seen[$1]++ {printf $1}')"
		[ "$status" != "" ] && \
			PS1+="|$chY$status$chW"
		PS1+="] "
	fi
	PS1+="${chB}\w${chW}"
	PS1+="\n${PS1_jaaENV:-:}"
}
setPrompt
unset color_prompt
unset -f setPrompt

PROMPT_COMMAND+='; history -a'
§p() { # toggle promt
	if [[ "$1" == '--help' ]]; then
		\cat <<- "HELP"
			§p [--help]
			§p <…cmd>

			Toggle <…cmd> in $PROMPT_COMMAND
			- history v1: `history -a`
			- history v2: `history -n; history -w; history -c; history -r`
		HELP
		return 0
	fi
	local cmd="$*"
	if [[ -z "$cmd" ]]; then
		declare -p PROMPT_COMMAND
		return 0
	fi
	if [[ "$PROMPT_COMMAND" == *"; $cmd"* ]]; then
		PROMPT_COMMAND="${PROMPT_COMMAND/; $cmd}"
	else
		PROMPT_COMMAND+="; $cmd"
	fi
}
complete -A command -A variable §p

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