Battery indicator for use with RPROMPT in oh-my-zsh. Has a fallback to displaying time if on a Linux-system with no acpi (haven't tested acpi as i don't have a Linux-laptop here atm)

battery.zsh

function battery_charge {
	if [[ $(uname -s) == 'Darwin' ]]; then
		percent_battery=$(pmset -g batt | grep -o "[0-9]*%" )
		percent_battery=${percent_battery:0:-1}

		charge="%{$fg_bold[green]%}⚡️ "
		if [[ -z $(pmset -g batt |grep "AC Power") ]]; then charge="%{$fg_bold[red]%}🔋 "	fi
		
	elif [[ $(uname -s) == 'Linux' ]]; then
		percent_battery=0
		#if [[ $(acpi 2&>/dev/null | grep -c '^Battery.*Discharging') -gt 0 ]] ; then
		#	percent_battery="$(acpi | cut -f2 -d ',' | tr -cd '[:digit:]')" 
		#fi
		
		if [[ $percent_battery -eq 0 ]]; then
			# Fallback to displaying IP and Time
			echo -n '['
			echo -n `/sbin/ifconfig eth0 | grep 'inet addr:' | cut -d: -f2 | awk '{ print $1}'`
			echo "][%*]"
			return 0
		fi
	fi

	color=green
	if [[ 20 -ge $percent_battery ]]; then
		color=red
	elif [[ 50 -ge $percent_battery ]]; then
		color=blue
	fi

	charged=$(( ($percent_battery) / 10 ))
	rest=$(( $percent_battery%10 ))
	if [[ $rest > 4 ]]; then charged=$(( $charged + 1 )) fi

	# print
	echo -n "$charge%{$fg_bold[$color]%}"
	for ((i = 0; i < $charged; i++)); do echo -n '▸' ; done
	for ((i = 0; i < $((  10 - $charged )); i++)); do echo -n '▹' ;done
	echo "%{$reset_color%}" 2>/dev/null
}

Changed char for displaying charging och discharging