_libcolor.sh

function color_get_ps1 {
	local hostname="${1:-$(hostname)}"
	hostname="${hostname/.*/}"

	if [[ "$(uname -s)" == "Darwin" ]]
	then
		hashfunc=$(type -p md5)
	else
		hashfunc=$(type -p md5sum)
	fi

	local hash=$("$hashfunc" <<< "$hostname")
	hash=${hash/ */}

	if [[ "$TERM" == *256* ]]; then
		_color_hash_to_rgb "$hash"
	else
		_color_hash_to_15bit "$hash"
	fi
}

function _color_hash_to_15bit {
	local hash="$1"
	local bright=${hash:0:12}
	local color=${hash:20:12}

	printf '\033[%d;%dm' \
		$[$(printf '%d' "0x${bright}")%3] \
		$[$[$(printf '%d' "0x${color}")%5]+32]
}

function _color_hash_to_rgb {
	local hash="$1"
	local R=${hash:0:8}
	local G=${hash:12:8}
	local B=${hash:24:8}

	printf '\033[38;2;%d;%d;%dm' \
		$[$(printf '%d' "0x${R}")%256] \
		$[$(printf '%d' "0x${G}")%256] \
		$[$(printf '%d' "0x${B}")%256]
}

color_code="$(color_get_ps1 "$(hostname -s)")"
PS1='${debian_chroot:+($debian_chroot)}\['"${color_code}"'\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
export PS1